Tooth preparation guide device and method of preparing tooth for dental prosthesis

Abstract

Dental preparation uses a tooth preparation guide custom-made for fitting with teeth of a patient. The preparation guide includes one or more guide channels for guiding a cutting tool. The preparation guide enables modification of the teeth as planned with high level of precision. A dental prosthesis for installing onto prepared teeth of the patient is provided before preparation of the teeth. The prosthesis includes features that are complementary to the prepared teeth. The prosthesis can be installed immediately after preparing the teeth using the preparation guide. With the high level of accuracy and precision in the preparation of teeth, no modification of the prosthesis would be needed for installation.

What is claimed is: 
     
       1. A dental preparation guide apparatus in a single body, the single body apparatus comprising a lingual sidewall, a buccal sidewall opposing the lingual sidewall, and an occlusal wall interconnecting the lingual and buccal sidewalls to form the single body, wherein the lingual sidewall, the buccal sidewall and the occlusal wall in combination define an interior space in which configured to receive a tooth comprising a buccal surface, a lingual surface, a mesial surface, a distal surface and an occlusal surface such that the lingual surface faces the lingual sidewall, the buccal surface faces the buccal sidewall, and the occlusal surface faces the occlusal wall,
 the apparatus further comprising a guide channel formed in the single body and shaped to receive a cutting tool and guide the cutting tool to travel along a trajectory; 
 the guide channel comprising two opposing channel surfaces that are substantially parallel to each other and extend along the trajectory such that the cutting tool is constrained by the two opposing channel surfaces while traveling along the trajectory, the guide channel further comprising at least one anti-tilting configuration formed into at least one of the two channel surfaces and configured to engage with the cutting tool for preventing or reducing tilting of the cutting tool in a plane parallel to a movement direction of movement of the cutting tool at a given point of the trajectory while the cutting tool travels along the trajectory; 
 wherein the guide channel comprises a buccal section, a lingual section, and an interconnecting section interconnecting that interconnects the buccal and lingual sections, which are connected to provide the guide channel as a single integrated channel that allows the cutting tool to travel through the buccal, interconnecting and lingual sections of the guide channel without having to remove the cutting tool therefrom; and 
 wherein when viewing in a direction toward the occlusal wall, the buccal section extends generally along the buccal sidewall, and the lingual section extends generally along the lingual sidewall. 
 
     
     
       2. The apparatus of  claim 1 , wherein the buccal section is configured to cause a portion permit at least part of the cutting tool to enter into a buccal area of the interior space between the buccal sidewall and the tooth such that the portion of the cutting tool cuts at least part of the buccal surface while traveling in the buccal section;
 wherein the lingual section is configured to cause the portion permit at least part of the cutting tool to enter into a lingual area of the interior space between the lingual sidewall and the tooth such that the portion of the cutting tool cut cuts at least part of the lingual surface while traveling in the lingual section; and 
 wherein the interconnecting section is configured to cause the portion permit at least part of the cutting tool to enter into an abutting area of the interior space between the tooth and an immediately neighboring tooth such that the portion of the cutting tool cut cuts at least part of the mesial or distal surface while traveling in the interconnecting section. 
 
     
     
       3. The apparatus of  claim 1 , wherein when viewing in the direction toward the occlusal wall, a tangential line of the buccal section at a point thereof is parallel to a tangential line of the lingual section at a point thereof,
 wherein the at least one anti-titling anti-tilting configuration comprises a first engagement structure and a second engagement structure extending along the trajectory and substantially parallel to each other, the first and second engagement structures being configured to engage respectively with first and second counterpart structures of the cutting tool, wherein engagement of the first and second engagement structures respectively with the first and second counterpart structures is to prevent or reduce tilting of the cutting tool in the plane parallel to the movement direction and further to prevent disengagement of the cutting tool from the guide channel while traveling along the trajectory except where a port of entry or discharge of the cutting tool is provided. 
 
     
     
       4. The apparatus of  claim 3 , wherein the guide channel further comprises a second interconnecting section that further interconnects the buccal and lingual sections to provide the guide channel in the form of a closed loop when viewing in the direction toward the occlusal wall. 
     
     
       5. The apparatus of  claim 3 , wherein the guide channel further comprises another section extending from either the buccal section or the lingual section, wherein when viewing in the direction toward the occlusal wall, a tangential line of the other section at a point thereof is parallel to a tangential line of the interconnecting section at a point thereof. 
     
     
       6. The apparatus of  claim 3 , wherein the guide channel further comprises another section extending from either the buccal section or the lingual section, wherein when viewing in the direction toward the occlusal wall, a tangential line of the other section at a point thereof is parallel to a tangential line of the interconnecting section at a point thereof, wherein the other section does not interconnect between the buccal and lingual sections, which makes the guide channel in the form of an open loop. 
     
     
       7. The apparatus of  claim 3 , wherein the guide channel is configured to allow a proximal portion of the cutting tool to pass through the occlusal wall while allowing a distal portion of the cutting tool extends into the interior space, wherein each of the first and second counterpart structures is in a spherical shape as part of the cutting tool, and wherein each of the first and second engagement structures is a channel portion of the guide channel configured to accommodate traveling of the spherical shape therethrough. 
     
     
       8. A method of providing a dental restoration kit, the method comprising:
 providing a first 3D image data representing one or more teeth of a patient before a desired preparation of the one or more teeth for installing a desired dental prosthesis; 
 before the desired preparation and before making the desired dental prosthesis, determining an axis of insertion along which the desired dental prosthesis should approach the one or more teeth for engaging the desired dental prosthesis with the one or more teeth after the desired preparation, wherein the axis of insertion is determined relative to the one or more teeth; 
 generating a second 3D image data representing the one or more teeth after to be obtained by the desired preparation; 
 producing the dental preparation guide apparatus of  claim 3  based on the first 3D image data and the second 3D image data, wherein the interior space of the dental preparation guide apparatus is configured to receive the one or more teeth for engagement therewith, wherein the guide channel of the dental preparation guide apparatus is configured to guide the cutting tool comprising a burr for cutting at least part of the one or more teeth for the desired preparation; and 
 producing the desired prosthesis based on the first 3D image data and 3D image data comprising the second 3D image data. 
 
     
     
       9. The method of  claim 8 , wherein determining the axis of insertion comprises:
 processing the first 3D image data to orient a 3D image of the one or more teeth in multiple directions; 
 providing information indicative of undercuts in each of the multiple directions of orientation of orienting the 3D image; and 
 choosing a direction of orientation of the 3D image one of the multiple directions as the axis of insertion based on the information indicative of the undercuts. 
 
     
     
       10. The method of  claim 8 , wherein generating the second 3D image data comprises:
 processing the first 3D image data together with the input of an area of cutting a desired cutting area and desired cutting depth of cutting, 
 wherein the single body apparatus further comprises a port configured to allow the burr at least part of the cutting tool to enter into or discharged from the guide channel, wherein the port is located in a portion of the single body that corresponds to another tooth received by the interior space, wherein the guide channel further comprises a non-cutting access way interconnecting between the port and one of the buccal section, the interconnecting section and the lingual section, wherein the non-cutting access way does not cause is configured such that the burr to does not cut the other tooth received by the interior space the one or more teeth while the cutting tool travels the non-cutting access way. 
 
     
     
       11. The method of  claim 8 , wherein generating the second 3D image data comprises:
 processing the first 3D image data with thereceiving input of one or more selected from the group consisting of an orientation of the burr, a diameter of the burr, a length of the burr, tapered shape information of the burr, a position of the burr relative to the one or more teeth, a distance between a rotational axis of the burr and an exterior surface of the one or more teeth, and a level of the burr relative to the one or more teeth; and 
 processing the first 3D image data together with the input, 
 wherein each of the first and second counterpart structures is in a spherical shape as part of the burr, and wherein each of the first and second engagement structures is a channel portion of the guide channel configured to accommodate traveling of the spherical shape therethrough. 
 
     
     
       12. The method of  claim 8  wherein producing the desired prosthesis comprises:
 generating a fourth 3D image data of for the desired prosthesis; and 
 making the desired prosthesis using the fourth 3D image data. 
 
     
     
       13. The method of  claim 8 , further comprising providing the burr cutting tool, wherein at least one of the first and second counterpart structures is in a spherical shape as part of the burr cutting tool, and wherein at least one of the first and second engagement structures is a channel portion of the guide channel configured to accommodate traveling of the spherical shape therethrough. 
     
     
       14. A method of making devices for dental procedure, comprising:
 providing a first 3D image data representing one or more teeth of a patient before a desired preparation of the one or more teeth for installing a desired dental prosthesis; 
 before the desired preparation, generating a first image illustrating a first prospective shape of the one or more teeth that would exist after installation of a first dental prosthesis; 
 before the desired preparation, providing the first image for the patient's review of the first image; 
 subsequent to the patient's approval of the first image and before the desired preparation, causing to make the first dental prosthesis based on image data comprising the first image; and 
 subsequent to the patient's approval of the first image, making the dental preparation guide apparatus of  claim 3  based on the first 3D image data, wherein the interior space of the dental preparation guide apparatus is configured to fit at least part of the one or more teeth, wherein the guide channel of the dental preparation guide apparatus is configured to guide the cutting tool comprising a burr to travel along the trajectory to cut at least part of the one or more teeth for fitting the first dental prosthesis without the need of additional substantial cutting of the one or more teeth. 
 
     
     
       15. The method of  claim 14 , further comprising:
 before the desired preparation, generating a second 3D image data representing a prospective, prepared shape of the one or more teeth that would exist after the desired preparation thereof, wherein the single body apparatus further comprises a port configured to allow the burr at least part of the cutting tool to enter into or discharged from the guide channel, wherein the port is located in a portion of the single body that corresponds to another tooth received by the interior space, wherein the guide channel further comprises a non-cutting access way interconnecting between the port and one of the buccal section, the interconnecting section and the lingual section, wherein the non-cutting access way does not cause is configured such that the burr to does not cut the other tooth received by the interior space one or more teeth while the cutting tool travels the non-cutting access way. 
 
     
     
       16. The method of  claim 14 , further comprising:
 before the desired preparation, generating a second image illustrating a second prospective shape of the one or more teeth that would exist after installation of a second dental prosthesis; 
 before the desired preparation, providing a plurality of images comprising the first and second images for the patient's review; and 
 receiving the patient's approval of the first image rather than the second image, wherein the first and second prospective shapes differ in at least one selected from the group consisting of length, width, surface curvature, embrasure and shading. 
 
     
     
       17. The method of  claim 14 , further comprising:
 subsequent to providing the first image and prior to the patient's approval, receiving the patient's request to modify the first image; 
 changing the first prospective shape based on the patient's request to modify the first image; and 
 providing an a modified first image illustrating the changed first prospective shape for the patient's approval. 
 
     
     
       18. A method of dental procedure, comprising:
 making a the first dental prosthesis and a the preparation guide device in accordance with the method of  claim 14 , wherein at least one of the first and second counterpart structures is in a spherical shape as part of the burr, and wherein at least one of the first and second engagement structures is a channel portion of the guide channel configured to accommodate traveling of the spherical shape therethrough; and 
 providing the first dental prosthesis and the preparation guide device to a dental practitioner for preparing at least part of the one or more teeth and installing the first dental prosthesis onto the one or more teeth after preparation. 
 
     
     
       19. The method of  claim 18 , further comprising: providing the burr along with the first dental prosthesis and the dental preparation guide apparatus, wherein the dental preparation guide apparatus further comprises a guide groove formed along the at least one guide channel, wherein the burr comprises an elongated body with a bump between two ends thereof, wherein the elongated body is configured to fit in the at least one guide channel of the preparation guide device and the bump is configured to fit the guide groove such that the guide channel and the guide groove in combination position and orient the burr relative to the one or more teeth in a predetermined manner. 
     
     
       20. The apparatus of  claim 1 , wherein the interior space defined by the lingual sidewall, the buccal sidewall and the occlusal wall is configured to receive one or more additional teeth, wherein the single body apparatus further comprises a port configured to allow at least part of the cutting tool to enter into or discharged from the guide channel, wherein the port is located in a portion of the single body that corresponds to one of the one or more additional teeth, wherein the guide channel further comprises a non-cutting access way interconnecting between the port and one of the buccal section, the interconnecting section and the lingual section, wherein the non-cutting access way does not cause is configured such that the cutting tool to does not cut the tooth or one or more additional teeth. 
     
     
       21. A method of preparing a tooth for dental restoration, the method comprising:
 providing the apparatus of  claim 1  for preparation of a tooth comprising a buccal surface, a lingual surface, a mesial surface, a distal surface and an occlusal surface; 
 engaging the apparatus with the tooth such that the tooth is received in the interior space and such that the lingual surface faces the lingual sidewall, the buccal surface faces the buccal sidewall, and the occlusal surface faces the occlusal wall; 
 inserting the cutting tool comprising a burr into the guide channel via an insertion hole; 
 traveling the burr cutting tool along the trajectory of the guide channel comprising the buccal section, the lingual section and the interconnecting section, by which the burr cuts side surface of the tooth comprising such that the cutting tool cuts at least part of the lingual surface, at least part of the buccal surface and at least part of the mesial or distal surface; and 
 wherein during traveling of the burr cutting tool along the trajectory, the burr cutting tool is not removed disengaged from the guide channel until completion of the cutting side surfaces of the tooth. 
 
     
     
       22. The method of  claim 21 , wherein when viewing in the direction toward the occlusal wall, a tangential line of the buccal section at a point thereof is parallel to a tangential line of the lingual section at a point thereof,
 wherein the at least one anti-titling anti-tilting configuration comprises a first engagement structure and a second engagement structure extending along the trajectory and substantially parallel to each other, the first and second engagement structures being configured to engage respectively with first and second counterpart structures of the cutting tool, wherein engagement of the first and second engagement structures respectively with the first and second counterpart structures is to prevent or reduce tilting of the cutting tool in the plane parallel to the movement direction and further to prevent disengagement of the cutting tool from the guide channel while traveling along the trajectory except where a port of entry or discharge of the cutting tool is provided in the guide channel. 
 
     
     
       23. The apparatus of  claim 1 , wherein the cutting tool comprises an inserting structure connected to a dentist's handpiece, in which and a burr connected to the inserting structure, wherein the guide channel is configured to engage with the cutting tool such that the inserting structure is inserted between the two opposing channel surfaces, wherein the inserting structure comprises at least one counterpart structure configured to engage with the at least one anti-tilting feature configuration of the guide channel. 
     
     
       24. A system for dental preparation, comprising:
 the apparatus of  claim 1 ; 
 a dental handpiece comprising an inserting structure, wherein the inserting structure and a burr constitutes constitute a cutting tool to be received by the guide channel of the apparatus; and 
 the inserting structure comprising at least one counterpart structure configured to engage with the at least one anti-tilting configuration of the guide channel such that the inserting structure is constrained by the at least one anti-tilting configuration of the guide channel rather than the burr. 
 
     
     
       25. The apparatus of  claim 1 , wherein the cutting tool comprises a burr and an inserting structure that are connected to a dentist's handpiece, wherein the inserting structure is inserted between and constrained by the two opposing channel surfaces of the guide channel, wherein the inserting structure cutting tool comprises at least one counterpart structure configured to engage with the at least one anti-tilting configuration of the guide channel. 
     
     
       26. The apparatus of  claim 1 , wherein the cutting tool comprises a burr and an inserting structure that are connected to a dentist's handpiece, wherein when the cutting tool is received by the guide channel, the inserting structure is constrained by the guide channel whereas the burr is not directly constrained by the guide channel. 
     
     
       27. A dental preparation guide apparatus in a single body, the single body apparatus comprising a lingual sidewall, a buccal sidewall opposing the lingual sidewall, and an occlusal wall interconnecting the lingual and buccal sidewalls to form the single body, wherein the lingual sidewall, the buccal sidewall and the occlusal wall in combination define an interior space in which configured to receive two or more teeth comprising a first tooth and a second tooth,
 wherein the lingual sidewall comprises a first lingual sidewall and a second lingual sidewall, the buccal sidewall comprises a first buccal sidewall and a second buccal sidewall, the occlusal wall comprises a first occlusal wall and a second occlusal wall; 
 wherein the first lingual sidewall and the first buccal sidewall oppose each other and are configured to sandwich the first tooth when the first and second teeth are received in the interior space; 
 wherein the second lingual sidewall and the second buccal sidewall oppose each other and are configured to sandwich the second tooth when the first and second teeth are received in the interior space; 
 wherein the first occlusal wall interconnecting interconnects between the first lingual sidewall and the first buccal sidewall and is configured to overlap the first tooth when the first and second teeth are received in the interior space; 
 wherein the second occlusal wall interconnecting interconnects between the second lingual sidewall and the second buccal sidewall and is configured to overlap the second tooth when the first and second teeth are received in the interior space; 
 wherein the apparatus further single body comprises a first guide channel formed in the single body through the first occlusal wall and shaped to receive a cutting tool and guide for guiding the cutting tool to travel along a first trajectory, the first guide channel comprising a first engagement structure configured to engage with a first counterpart structure of the cutting tool and further configured to prevent disengagement of the cutting tool from the first guide channel while traveling along the first trajectory; and 
 wherein the single body further comprises a second guide channel formed in through the second occlusal wall and shaped to receive the cutting tool or another cutting tool to guide for guiding the same to travel along the second guide channel a second trajectory. 
 
     
     
       28. The apparatus of  claim 27 , wherein the first and second teeth are adjacent with each other with no tooth therebetween and with no missing tooth therebetween, wherein the first guide channel and the second guide channel are connected together and form a single connected channel such that the cutting tool received in the first guide channel can travel to the second guide channel without having to be removed from the first guide channel. 
     
     
       29. The apparatus of  claim 27 , wherein the first and second teeth are immediately next to each other with no tooth therebetween and with no missing tooth therebetween, wherein the first guide channel and the second guide channel are separate from each other and a portion of the single piece body blocks between the first and second guide channels such that the cutting tool received in the first guide channel must be removed from the first guide channel in order to be received in the second guide channel, wherein the first guide channel comprises a second engagement structure configured to engage with a second counterpart structure of the cutting tool, wherein engagement of the first and second engagement structures respectively with the first and second counterpart structures is to prevent or reduce tilting of the cutting tool in the a plane parallel to the a movement direction of the cutting tool at a given point of the first trajectory while traveling along the first trajectory. 
     
     
       30. The apparatus of  claim 27 , wherein a missing tooth exists between the first and second teeth,
 wherein the lingual sidewall further comprises a third lingual sidewall located between the first lingual sidewall and the second lingual sidewall; 
 wherein the buccal sidewall further comprises a third buccal sidewall located between the first buccal sidewall and the second buccal sidewall; 
 wherein the occlusal wall further comprises a third occlusal wall located between the first occlusal wall and the second occlusal wall; 
 wherein the third lingual sidewall, the third buccal sidewall and the third occlusal wall at least partially surrounds a space of the missing tooth when the first and second teeth are received in the interior space; and 
 wherein the first guide channel comprises a second engagement structure configured to engage with a second counterpart structure of the cutting tool, wherein engagement of the first and second engagement structures respectively with the first and second counterpart structures is to prevent or reduce tilting of the cutting tool in the a plane parallel to the a movement direction of the cutting tool at a given point of the first trajectory while traveling along the first trajectory. 
 
     
     
       31. The apparatus of  claim 30 , wherein the single body comprises a third guide channel formed in through the third occlusal wall and shaped to receive the cutting tool or another cutting tool to guide for guiding the same to travel along the third guide channel a third trajectory,
 wherein the first guide channel and the second guide channel are connected together via the third guide channel and form a single connected channel such that the cutting tool received in the first guide channel can travel to the second guide channel without having to be removed from the first guide channel. 
 
     
     
       32. The apparatus of  claim 30 , wherein the single body does not comprise a guide channel in the third occlusal wall,
 wherein the first guide channel and the second guide channel are separate from each other and a portion of the third occlusal wall blocks is interposed between the first and second guide channels such that the cutting tool received in the first guide channel must be removed from the first guide channel in order to be received in the second guide channel. 
 
     
     
       33. The apparatus of  claim 27 , wherein a third tooth exist exists between the first and second teeth,
 wherein the lingual sidewall further comprises a third lingual sidewall located between the first lingual sidewall and the second lingual sidewall; 
 wherein the buccal sidewall further comprises a third buccal sidewall located between the first buccal sidewall and the second buccal sidewall; 
 wherein the occlusal wall further comprises a third occlusal wall located between the first occlusal wall and the second occlusal wall; 
 wherein the third lingual sidewall, the third buccal sidewall and the third occlusal wall at least partially surrounds the third tooth when the first, second and third teeth are received in the interior space; and 
 wherein the first guide channel comprises a second engagement structure configured to engage with a second counterpart structure of the cutting tool, wherein engagement of the first and second engagement structures respectively with the first and second counterpart structures is to prevent or reduce tilting of the cutting tool in the a plane parallel to the a movement direction of the cutting tool at a given point of the first trajectory while traveling along the first trajectory. 
 
     
     
       34. The apparatus of  claim 33 , wherein the single body comprises a third guide channel formed in through the third occlusal wall and shaped to receive the cutting tool or another cutting tool to guide for guiding the same to travel along the third guide channel a third trajectory,
 wherein the first guide channel and the second guide channel are connected together via the third guide channel and form a single connected channel such that the cutting tool received in the first guide channel can travel to the second guide channel without having to be removed from the first guide channel. 
 
     
     
       35. The apparatus of  claim 27 , wherein the first guide channel comprises a first buccal section, a first lingual section, and a first interconnecting section interconnecting the first buccal and first lingual sections to provide the first guide channel as a single integrated channel that allows the cutting tool to travel between the first lingual section and the first buccal section without having to remove the cutting tool therefrom,
 wherein when viewing in a direction toward the occlusal wall, the first buccal section extends generally along the first buccal sidewall, and the first lingual section extends generally along the first lingual sidewall; and 
 wherein the first guide channel comprises a second engagement structure configured to engage with a second counterpart structure of the cutting tool, wherein engagement of the first and second engagement structures respectively with the first and second counterpart structures is to prevent or reduce tilting of the cutting tool in the a plane parallel to the a movement direction of the cutting tool at a given point of the first trajectory while traveling along the first trajectory. 
 
     
     
       36. The apparatus of  claim 35 , wherein the first buccal section is configured to cause a portion permit at least part of the cutting tool to enter into a buccal area of the interior space between the first buccal sidewall and the first tooth for cutting at least part of a buccal surface of the first tooth while traveling in the first buccal section when the first and second teeth are received in the interior space;
 wherein the first lingual section is configured to cause the portion permit at least part of the cutting tool to enter into a lingual area of the interior space and between the first lingual sidewall and the first tooth for cutting at least part of a lingual surface of the first tooth while traveling in the first lingual section when the first and second teeth are received in the interior space; and 
 wherein the first interconnecting section is configured to cause the portion permit at least part of the cutting tool to enter into the interior space for cutting at least part of a mesial or distal surface of the first tooth while traveling in the first interconnecting section when the first and second teeth are received in the interior space. 
 
     
     
       37. The apparatus of  claim 35 , wherein when viewing in the direction toward the occlusal wall, a tangential line of the first buccal section at a point thereof is parallel to a tangential line of the first lingual section at a point thereof, wherein each of the first and second counterpart structures is in a spherical shape as part of the cutting tool, and wherein each of the first and second engagement structures is a channel portion of the first guide channel configured to accommodate traveling of the spherical shape therethrough. 
     
     
       38. The apparatus of  claim 35 , wherein the first guide channel further comprises a second interconnecting section that further interconnects the first buccal section and the first lingual section to provide the first guide channel in the form of a closed loop when viewing in the direction toward the occlusal wall, wherein each of the first and second counterpart structures is in a spherical shape as part of the cutting tool, and wherein each of the first and second engagement structures is a channel portion of the first guide channel configured to accommodate traveling of the spherical shape therethrough. 
     
     
       39. The apparatus of  claim 35 , wherein the first guide channel further comprises another section extending from either the first buccal section or the first lingual section, wherein when viewing in the direction toward the occlusal wall, a tangential line of the other section at a point thereof is parallel to a tangential line of the first interconnecting section at a point thereof, wherein the single body apparatus further comprises a port configured to allow at least part of the cutting tool to enter into or discharged from the first guide channel, wherein the port is located in a portion of the single body that corresponds to one of the two or more teeth received by the interior space, wherein the first guide channel further comprises a non-cutting access way interconnecting between the port and one of the buccal section, the first interconnecting section and the lingual section, wherein the non-cutting access way does not cause the cutting tool to cut is configured such that the cutting tool does not cut the two or more teeth while traveling the non-accessing way. 
     
     
       40. The apparatus of  claim 35 , wherein the first guide channel further comprises another section extending from either the first buccal section or the first lingual section, wherein when viewing in the direction toward the occlusal wall, a tangential line of the other section at a point thereof is parallel to a tangential line of the first interconnecting section at a point thereof, wherein the other section does not interconnect between the first buccal section and the first lingual section to make such that the first guide channel is provided in the form of an open loop, wherein the single body apparatus further comprises a port configured to allow at least part of the cutting tool to enter into or discharged from the first guide channel, wherein the port is located in a portion of the single body that corresponds to one of the two or more teeth received by the interior space, wherein the first guide channel further comprises a non-cutting access way interconnecting between the port and one of the buccal section, the first interconnecting section and the lingual section, wherein the non-cutting access way does not cause the cutting tool to is configured such that the cutting tool does not cut the two or more teeth while traveling the non-access way. 
     
     
       41. The apparatus of  claim 27 , wherein the first guide channel comprises two channel surfaces that are substantially parallel and opposing surfaces formed in the single body each other, wherein the two channel surfaces are configured to receive interpose part of the cutting tool therebetween and to constrain the cutting tool while traveling along the first trajectory. 
     
     
       42. The apparatus of  claim 41 , wherein the cutting tool further comprises an inserting structure connected to a dentist's handpiece, in which wherein the first guide channel is configured to engage with the cutting tool such that the inserting structure is inserted between the two channel surfaces and constrained by the two channel surfaces while the cutting tool is traveling along the first trajectory. 
     
     
       43. A system for dental preparation, comprising:
 the apparatus of  claim 41 ; 
 a cutting tool comprising an inserting structure connected to a dental handpiece with anand a burr connected to the inserting structure connected to the dental handpiece; and 
 wherein the inserting structure is configured to be inserted between and constrained by the two channel surfaces of the first guide channel. 
 
     
     
       44. A method of dental procedure, comprising:
 providing a dental prosthesis for installing onto one or more teeth of a patient, the one or more teeth comprising a first tooth comprising that comprises an occlusal surface, a buccal side, a lingual side, a distal side and a mesial side; 
 providing a preparation guide device in a single piece for use in preparing the one or more teeth of the patient for installing the dental prosthesis, wherein the preparation guide device is custom-made to fit at least part of the one or more teeth and comprises at least one guide channel configured to guide a cutting tool, wherein the at least one guide channel comprises a first single channel that the cutting tool can travel along a first trajectory thereof, the first single channel comprising a first engagement structure and a second engagement structure extending along the first trajectory and substantially parallel to each other; 
 mounting the preparation guide device over the one or more teeth such that the preparation guide device fit the at least part of the one or more teeth; 
 providing the cutting tool comprising a burr, the cutting tool further comprising a first counterpart structure and a second counterpart structure; 
 engaging the cutting tool with the first single channel such that the first and second counterpart structures of the burr engage respectively with the first and second engagement structures of the first single channel; 
 moving the burr cutting tool along the first trajectory to cut the first tooth on such that the burr of the cutting tool contacts and cuts three or four of the buccal, lingual, distal and mesial sides of the first tooth without having to remove disengage the burr cutting tool from the first single channel of the preparation guide device, which completes preparation of the first tooth for installing the dental prosthesis onto the first tooth without the need of an additional preparation guide device for preparing the first tooth and without the need of an additional substantial cutting of the first tooth, wherein engagement of the first and second engagement structures with the first and second counterpart structures prevents or reduces tilting of the burr cutting tool in a plane parallel to a movement direction of movement of the bur cutting tool at a given point of the first trajectory and further prevents disengagement of the burr cutting tool from the first single channel while the burr cutting tool is traveling along the first trajectory except where at a disengagement configuration is provided in the first single channel; and 
 subsequently installing the dental prosthesis onto the first tooth so as to surround the three or four of the buccal, lingual, distal and mesial sides of the first tooth. 
 
     
     
       45. The method of  claim 44 , wherein cutting of the three or four sides leaves at least a portion of the four sides of the first tooth uncut, wherein the uncut portion comprises a contact point of the first tooth that contacts a neighboring tooth, wherein at least one of the first and second counterpart structures is in a spherical shape as part of the cutting tool, and wherein at least one of the first and second engagement structures is a channel portion of the first single channel configured to accommodate traveling of the spherical shape therethrough. 
     
     
       46. The method of  claim 44 , wherein the first single channel is configured to cut the four of the buccal, lingual, distal and mesial sides of the first tooth, wherein cutting of the four sides entirely encircles the first tooth when viewing in a direction toward the occlusal surface, wherein the dental prosthesis comprises a ring structure contacting the four sides of the first tooth that are cut using the first single channel, wherein at least one of the first and second counterpart structures is in a spherical shape as part of the cutting tool, and wherein at least one of the first and second engagement structures is a channel portion of the first single channel configured to accommodate traveling of the spherical shape therethrough. 
     
     
       47. The method of  claim 44 , wherein the first single channel is configured to cut the four of the buccal, lingual, distal and mesial sides of the first tooth, wherein cutting of the four sides does not entirely encircle the first tooth and leaves at least part of one of the four sides uncut when viewing in a direction toward the occlusal surface, wherein the dental prosthesis comprises a C-shaped structure contacting the four sides of the first tooth that are cut using the first single channel, wherein the single piece preparation guide device further comprises a port configured to allow the burr cutting tool to enter into or discharged from the first single channel, wherein the port is located in a portion of the single piece device that corresponds to one of the one or more teeth, wherein the first single channel further comprises a non-cutting access way interconnecting between that extends from the port and one of the buccal section, the interconnecting section and the lingual section, wherein the non-cutting access way does not cause the burr to cut the one or more teeth. 
     
     
       48. The method of  claim 44 , wherein the one or more teeth comprise a first tooth and a second tooth, wherein cutting the one or more teeth comprises cutting the first tooth and then cutting the second tooth, wherein the preparation guide device is not disconnected from the one or more teeth between cutting the first tooth and cutting the second tooth, and wherein the first single channel is further configured to cut the second tooth in addition to cutting the first tooth without having to remove the burr disengage the cutting tool from the first single channel, wherein the single piece preparation guide device further comprises a port configured to allow the burr cutting tool to enter into or discharged from the first single channel, wherein the port is located in a portion of the single piece device that corresponds to one of the one or more teeth, wherein the first single channel further comprises a non-cutting access way interconnecting between that extends from the port and one of the buccal section, the interconnecting section and the lingual section, wherein the non-cutting access way does not cause the burr to cut the one or more teeth. 
     
     
       49. The method of  claim 44 , wherein the one or more teeth comprise a first tooth and a second tooth, wherein cutting the one or more teeth comprises cutting the first tooth and then cutting the second tooth, wherein the preparation guide device is not disconnected from the one or more teeth between cutting the first tooth and cutting the second tooth, and wherein the at least one channel comprises a second single channel that is distinct from the first single channel and configured to cut the second tooth. 
     
     
       50. The method of  claim 44 , wherein providing the dental prosthesis comprises receiving the dental prosthesis from a third party or making the dental prosthesis in-house, wherein providing the preparation guide device comprises receiving the preparation guide device from a third party or making the preparation guide device in-house. 
     
     
       51. The method of  claim 44 , further comprising:
 causing to provide a 3D image data representing the one or more teeth of the patient before cutting the first tooth using the preparation sufficient to install the dental prosthesis guide device, 
 wherein causing to provide the 3D image data comprises at least one selected from the group consisting of:
 scanning of the patient's oral features using a 3D scanning device; and 
 
 taking an impression of the patient's oral features; 
 producing a 3D model of the patient's oral features from the impression; and 
 scanning the a 3D model representing the patient's oral features using a 3D scanning device. 
 
     
     
       52. The method of  claim 44 , wherein the first single channel comprises two channel surfaces that are substantially parallel and opposing surfaces formed in the single piece each other such that the cutting tool is constrained by the two opposing channel surfaces while traveling along the first trajectory. 
     
     
       53. The method of  claim 52 , wherein the burr is engaged with the first single channel via cutting tool further comprises an inserting structure connected to a dentist's handpiece, in which wherein engaging the cutting tool comprises inserting the inserting structure is inserted between the two channel surfaces and such that the inserting structure is constrained by the two opposing channel surfaces while traveling along the first trajectory. 
     
     
       54. A dental preparation guide apparatus in a single body, the single body apparatus comprising a lingual sidewall, a buccal sidewall opposing the lingual sidewall, and an occlusal wall interconnecting the lingual and buccal sidewalls to form the single body, wherein the lingual sidewall, the buccal sidewall and the occlusal wall in combination define an interior space in which configured to receive a tooth comprising a buccal surface, a lingual surface, a mesial surface, a distal surface and an occlusal surface such that the lingual surface faces the lingual sidewall, the buccal surface faces the buccal sidewall, and the occlusal surface faces the occlusal wall,
 wherein the single body comprising comprises a first guide channel that is formed in through the occlusal wall and shaped to engage with a first cutting tool to guide for guiding the first cutting tool to travel along a first trajectory; 
 wherein when viewing in a direction toward the occlusal wall, the first guide channel comprising comprises a section that extends generally along at least part of the buccal sidewall; 
 wherein the single body comprising comprises a second guide channel that is formed in through at least one of the buccal and lingual sidewalls and shaped to engage with the first cutting tool or a second cutting tool to guide for guiding the same first or second cutting tool to travel along a second trajectory; and 
 wherein when viewing in a direction toward the buccal sidewall, the second guide channel comprises a section that extends generally along at least part of the occlusal wall, 
 wherein the first guide channel comprises two channel surfaces that are substantially parallel and opposing each other such that the first cutting tool is constrained by the two channel surfaces while traveling along the first trajectory. 
 
     
     
       55. The apparatus of  claim 54 , wherein the occlusal wall comprises an interior surface facing the occlusal surface of the tooth when the tooth is received in the interior space, wherein the second guide channel extends generally along the interior surface of the occlusal wall when viewing in the direction toward the buccal sidewall; and
 wherein the buccal side wall comprises an interior surface facing the buccal surface of the tooth when the tooth is received in the interior space, wherein the first guide channel extends generally along the interior surface of the buccal wall when viewing in the direction toward the occlusal wall is configured to permit a burr portion of the first cutting tool to enter into the interior space. 
 
     
     
       56. The apparatus of  claim 54 , wherein the first guide channel further comprises another section, which extending generally along at least part of the mesial or distal surface of the tooth when viewed in the direction toward the occlusal wall, wherein the other section is configured to have permit a burr portion of the first cutting tool pass through the occlusal wall such that the first cutting tool extends into the interior space, and further such that the first cutting tool cuts one of the mesial and distal surfaces to cut at least part of the mesial or distal surface when the first cutting tool travels in the other section. 
     
     
       57. A method of preparing a tooth for dental restoration, the method comprising:
 providing the apparatus of  claim 54  for preparation of a tooth comprising a buccal surface, a lingual surface, a mesial surface, a distal surface and an occlusal surface; 
 engaging the apparatus with the tooth such that the tooth is received in the interior space and such that the lingual surface faces the lingual sidewall, the buccal surface faces the buccal sidewall, and the occlusal surface faces the occlusal wall; 
 inserting the first cutting tool comprising a burr into the first guide channel of the apparatus, whereby a cutting portion such that at least part of the burr enters into the interior space and between the buccal sidewall and the tooth; 
 cutting at least part of the buccal surface of the tooth while traveling the burr as the first cutting tool travels along the first trajectory of the first guide channel; 
 inserting the first cutting tool or a second cutting tool comprising a burr into the second guide channel, whereby a cutting portion such that at least part of the burr of the first or second cutting tool enters into the interior space and between the occlusal wall and the tooth, wherein inserting the first or second cutting tool into the second guide channel can occur either before or after cutting the buccal surface; and 
 cutting at least part of the buccal occlusal surface of the tooth while traveling the burr of as the first or second cutting tool travels along the second trajectory of the second guide channel. 
 
     
     
       58. The apparatus of  claim 54 , wherein the first guide channel comprises two substantially parallel and opposing surfaces formed in the single body such that the first cutting tool is constrained by the two opposing surfaces while traveling along the first trajectory. 
     
     
       59. The apparatus of claim  58  54, wherein the first cutting tool is to be engaged with the first guide channel via is configured to engage with an inserting structure connected to a dentist's handpiece, in which such that the inserting structure is inserted between the two channel surfaces and constrained by the two channel surfaces while the first cutting tool is traveling along the first trajectory, wherein the first cutting tool comprises the inserting structure and the burr integrated with the inserting structure. 
     
     
       60. A system for dental preparation, comprising:
 the apparatus of claim  58 54; 
 a dental handpiece with an inserting structure connected to the dental handpiece; and 
 wherein the inserting structure is configured to be inserted between the two channel surfaces of the first guide channel and constrained by the two channel surfaces while the first cutting tool is traveling along the first trajectory. 
 
     
     
       61. A dental preparation guide apparatus in a single body, the single body apparatus comprising a lingual sidewall, a buccal sidewall opposing the lingual sidewall, and an occlusal wall interconnecting the lingual and buccal sidewalls to form the single body, wherein the lingual sidewall, the buccal sidewall and the occlusal wall in combination define an interior space in which configured to receive a tooth comprising a buccal surface, a lingual surface, a mesial surface, a distal surface and an occlusal surface such that the lingual surface faces the lingual sidewall, the buccal surface faces the buccal sidewall, and the occlusal surface faces the occlusal wall,
 wherein the single body comprises a guide channel formed through at least one of the lingual and buccal sidewalls and shaped to engage with a cutting tool to guide for guiding the cutting tool to travel along a trajectory, the guide channel comprising two opposing channel surfaces that are substantially parallel to each other and extending along the trajectory such that the cutting tool is constrained by the two opposing surfaces while traveling along the trajectory; and 
 wherein the guide channel is configured to cause permit a burr portion of the cutting tool to enter into the interior space and to be inserted between the occlusal wall and the tooth such that the burr portion of the cutting tool cuts at least part of the occlusal surface while traveling in the guide channel along the trajectory. 
 
     
     
       62. The apparatus of  claim 61 , wherein the guide channel comprises further comprising a port configured to permit the entry of the cutting tool into the guide channel, wherein the port of the guide channel is formed through the occlusal wall such that the cutting tool enters into the guide channel formed in the at least one of the lingual and buccal sidewalls via the port through the occlusal wall, wherein the guide channel comprises an anti-tilting configuration formed into at least one of the two channel surfaces and configured to engage with the cutting tool for preventing or reducing tilting of the cutting tool in a plane parallel to a movement direction of movement of the cutting tool at a given point of the trajectory while the cutting tool travels along the trajectory. 
     
     
       63. The apparatus of  claim 62 , wherein the cutting tool is to be engaged with anti-tilting configuration of the guide channel via is configured to engage with an inserting structure connected to a dentist's handpiece, in which such that the inserting structure is inserted between the two opposing surfaces, wherein the inserting structure comprises a counterpart structure configured to engage with the anti-tilting configuration of the guide channel such that the inserting structure is further constrained by the guide channel rather than the cutting tool of the guide channel, wherein the cutting tool comprises the inserting structure and the burr portion integrated with the inserting structure. 
     
     
       64. A method of preparing a tooth for dental restoration, the method comprising:
 providing the apparatus of  claim 62  for preparation of a tooth comprising a buccal surface, a lingual surface, a mesial surface, a distal surface and an occlusal surface, wherein the anti-titling anti-tilting configuration comprises a first engagement structure and a second engagement structure extending along the trajectory and substantially parallel to each other, the first and second engagement structures being configured to engage respectively with first and second counterpart structures of the cutting tool, wherein engagement of the first and second engagement structures respectively with the first and second counterpart structures is to prevent or reduce tilting of the cutting tool in the plane parallel to the movement direction and further to prevent disengagement of the cutting tool from the guide channel while traveling along the trajectory except where a port of entry or discharge of the cutting tool is provided; 
 integrating the apparatus with the tooth such that the tooth is received in the interior space and such that the lingual surface faces the lingual sidewall, the buccal surface faces the buccal sidewall, and the occlusal surface faces the occlusal wall; 
 engaging the guide channel of the apparatus with the a cutting tool comprising a burr, whereby a cutting portion such that at least part of the burr enters into the interior space and between the occlusal wall and the tooth; and 
 traveling the burr cutting tool along the guide channel while running the burr, thereby cutting such that at least part of the occlusal surface of the tooth is cut. 
 
     
     
       65. A method of preparing for a dental restoration, the method comprising:
 providing a first 3D image data representing one or more teeth of a patient before a desired preparation of the one or more teeth for installing a desired dental prosthesis;   before the desired preparation and before making the desired dental prosthesis, determining an axis of insertion along which the desired dental prosthesis should approach the one or more teeth for engaging the desired dental prosthesis with the one or more teeth after the desired preparation;   generating a second 3D image data representing the one or more teeth to be obtained by the desired preparation;   producing a dental preparation guide apparatus based on the first 3D image data and the second 3D image data, wherein dental preparation guide apparatus comprises a lingual sidewall, a buccal sidewall opposing the lingual sidewall, and an occlusal wall interconnecting the lingual and buccal sidewalls to form a single piece body, wherein the lingual sidewall, the buccal sidewall and the occlusal wall in combination define an interior space configured to receive one or more teeth for engagement therewith, wherein the dental preparation guide apparatus comprises a guide channel formed in the single body and shaped to receive a cutting tool for cutting at least part of the one or more teeth for the desired preparation; and   producing the desired prosthesis based on 3D image data comprising the second 3D image data.