Method and instruments for inserting modular implant components

Abstract

An instrument is disclosed for inserting a modular implant, the instrument comprising a first end and a second end, the first end having engagement means for engaging a stem component of the modular implant, the engagement means comprising separation means for separating a body component of the modular implant and the stem component from one another so as to permit rotational positioning of the body component and the stem component relative to one another.

1 . An instrument for inserting a modular implant, the instrument comprising:
 a first end and a second end, the first end having a stem engagement feature for engaging a stem component of a modular implant and a body engagement feature for engaging a body component of a modular implant, the stem engagement feature and the body engagement feature being so disposed as to maintain a separation between an implant body component and an implant stem component when the engagement features are in contact with their respective components so as to permit rotational positioning of the body component and the stem component relative to one another   
     
     
         2 . An instrument for inserting a modular implant according to  claim 1  wherein the second end of the instrument has an impaction site, and further wherein the body component and the stem component are disengaged from one another by applying a force to the impaction site. 
     
     
         3 . An instrument for inserting a modular implant according to  claim 1  wherein the stem engagement feature comprises a threaded recess and one end of the stem component comprises a threaded end, the threaded end and the threaded recess configured to threadably engage one another, where the depth of the stem engagement feature is less than the length of the threaded end of the stem that is exposed above the engagement surface on the body when the implant is assembled together. 
     
     
         4 . An instrument for inserting a modular implant according to  claim 1  wherein the stem engagement feature comprises a threaded protrusion and one end of the stem component comprises a threaded recess, the threaded recess and the threaded protrusion configured to threadably engage one another, where the length of the stem engagement feature is greater than the depth of the engagement surface on the stem below the engagement surface on the body when the implant is assembled together. 
     
     
         5 . An instrument for inserting a modular implant according to  claim 1  wherein the stem engagement feature and the body engagement feature act to align the implant body and implant stem. 
     
     
         6 . An instrument for inserting a modular implant, the instrument comprising:
 a first end and a second end, the first end having a stem engagement feature for engaging a stem component of a modular implant and a neck engagement feature for engaging a neck component of a modular implant, the stem engagement feature and the neck engagement feature being so disposed as to maintain a separation between an implant neck component and an implant stem component when the engagement features are in contact with their respective components so as to permit rotational positioning of the neck component and the stem component relative to one another   
     
     
         7 . An instrument for inserting a modular implant according to  claim 6  wherein the second end of the instrument has an impaction site, and further wherein the neck component and the stem component are disengaged from one another by applying a force to the impaction site. 
     
     
         8 . An instrument for inserting a modular implant according to  claim 6  wherein the stem engagement feature comprises a threaded recess and one end of the stem component comprises a threaded end, the threaded end and the threaded recess configured to threadably engage one another, where the depth of the stem engagement feature is less than the length of the threaded end of the stem that is exposed above the engagement surface on the neck when the implant is assembled together. 
     
     
         9 . An instrument for inserting a modular implant according to  claim 6  wherein the stem engagement feature comprises a threaded protrusion and one end of the stem component comprises a threaded recess, the threaded recess and the threaded protrusion configured to threadably engage one another, where the length of the stem engagement feature is greater than the depth of the engagement surface on the stem below the engagement surface on the neck when the implant is assembled together. 
     
     
         10 . An instrument for inserting a modular implant according to  claim 6  wherein the stem engagement feature and the neck engagement feature act to align the implant neck and implant stem. 
     
     
         11 . An instrument for inserting a modular implant, the instrument comprising:
 a first end and a second end, the first end having a stem engagement feature for engaging a stem component of a modular implant and a main implant engagement feature for engaging a main implant component of a modular implant, the stem engagement feature and the main implant engagement feature being so disposed as to maintain a separation between an implant main implant component and an implant stem component when the engagement features are in contact with their respective components so as to permit rotational positioning of the main implant component and the stem component relative to one another   
     
     
         12 . An instrument for inserting a modular implant according to  claim 11  wherein the second end of the instrument has an impaction site, and further wherein the main implant component and the stem component are disengaged from one another by applying a force to the impaction site. 
     
     
         13 . An instrument for inserting a modular implant according to  claim 11  wherein the stem engagement feature comprises a threaded recess and one end of the stem component comprises a threaded end, the threaded end and the threaded recess configured to threadably engage one another, where the depth of the stem engagement feature is less than the length of the threaded end of the stem that is exposed above the engagement surface on the main implant when the implant is assembled together. 
     
     
         14 . An instrument for inserting a modular implant according to  claim 11  wherein the stem engagement feature comprises a threaded protrusion and one end of the stem component comprises a threaded recess, the threaded recess and the threaded protrusion configured to threadably engage one another, where the length of the stem engagement feature is greater than the depth of the engagement surface on the stem below the engagement surface on the main implant when the implant is assembled together. 
     
     
         15 . An instrument for inserting a modular implant according to  claim 11  wherein the stem engagement feature and the main implant engagement feature act to align the implant main implant and implant stem. 
     
     
         16 . A method for inserting a modular implant, the instrument where: an instrument is provided comprising:
 a first end and a second end, the first end having a stem engagement feature for engaging a stem component of a modular implant and a body engagement feature for engaging a body component of a modular implant, the stem engagement feature and the body engagement feature being so disposed as to maintain a separation between an implant body component and an implant stem component when the engagement features are in contact with their respective components so as to permit rotational positioning of the body component and the stem component relative to one another   
     
     
         17 . A method for inserting a modular implant according to  claim 16  wherein the second end of the instrument has an impaction site, and further wherein the body component and the stem component are disengaged from one another by applying a force to the impaction site. 
     
     
         18 . A method for inserting a modular implant according to  claim 16  wherein the stem engagement feature comprises a threaded recess and one end of the stem component comprises a threaded end, the threaded end and the threaded recess configured to threadably engage one another, where the depth of the stem engagement feature is less than the length of the threaded end of the stem that is exposed above the engagement surface on the body when the implant is assembled together. 
     
     
         19 . A method for inserting a modular implant according to  claim 16  wherein the stem engagement feature comprises a threaded protrusion and one end of the stem component comprises a threaded recess, the threaded recess and the threaded protrusion configured to threadably engage one another, where the length of the stem engagement feature is greater than the depth of the engagement surface on the stem below the engagement surface on the body when the implant is assembled together. 
     
     
         20 . A method for inserting a modular implant according to  claim 16  wherein the stem engagement feature and the body engagement feature act to align the implant body and implant stem. 
     
     
         21 . An instrument for inserting a modular implant, the instrument comprising:
 a first end and a second end, the first end having a stem engagement feature for engaging a stem component of the modular implant and a body engagement feature for engaging a body component of the modular implant, the second end having an impaction feature for applying a force to the instrument, the stem engagement feature and the body engagement feature being configurably disposed so as to maintain a separation between the body component and the stem component so as to permit rotational positioning of the body component and the stem component relative to one another.   
     
     
         22 . An instrument for inserting a modular implant according to  claim 21  wherein the second end of the instrument has an impaction site, and further wherein the body component and the stem component are disengaged from one another by applying a force to the impaction site. 
     
     
         23 . An instrument for inserting a modular implant according to  claim 21  wherein one end of the stem component comprises a threaded end extending from the stem component and the stem engagement feature forms a threaded recess, the threaded end and the threaded recess configured to threadably engage one another, wherein the distance between the stem engagement feature and the body engagement feature is less than the distance between the engagement surface on the stem and the engagement surface on the body when the implant is assembled together. 
     
     
         24 . An instrument for inserting a modular implant according to  claim 21  wherein an end of the stem component comprises a threaded recess extending into the stem component and the stem engagement feature forms a threaded protrusion, the threaded recess and the threaded protrusion configured to threadably engage one another, wherein the distance between the stem engagement feature and the body engagement feature is greater than the distance between the engagement surface on the stem and the engagement surface on the body when the implant is assembled together. 
     
     
         25 . An instrument for inserting a modular implant according to  claim 21  wherein the stem component comprises a threaded end extending therefrom and the stem engagement feature forms a threaded recess, the threaded end and the threaded recess configured to threadably engage one another, where the distance between the stem engagement feature and the body engagement feature is less than the distance between the engagement surface on the stem and the engagement surface on the body. 
     
     
         26 . An instrument for inserting a modular implant according to  claim 21  wherein the second end of the instrument has an impaction site, and further wherein the body component and the stem component are disengaged from one another by applying a predetermined force to the impaction site. 
     
     
         27 . An insertion tool for inserting a modular implant according to  claim 21  wherein the second end of the instrument has an impaction site, wherein the body component and the stem component are disengaged from one another by applying a predetermined force to the impaction site. 
     
     
         28 . An insertion tool for inserting a modular implant of the type comprising a body component having a neck segment extending therefrom, and the body component forming a bore and counterbore therein, and a stem component having a threaded end configured for selective disposal within the bore and counterbore so as to expose through the counterbore a given length thereof, the insertion tool comprising:
 a first end and a second end, the first end forming a threaded recess for engaging the stem component of the modular implant, the threaded recess having a depth less than the length of the threaded end so as to permit rotational positioning of the body component and the stem component relative to one another.   
     
     
         29 . An insertion tool for inserting a modular implant according to  claim 28  wherein the body component comprises a unitary body segment and neck segment. 
     
     
         30 . An insertion tool for inserting a modular implant according to  claim 28  further comprising a neck component configured to selectively attach to the body component. 
     
     
         31 . An instrument for inserting a modular implant, the instrument comprising:
 a first end and a second end, the first end having a stem engagement feature for engaging a stem component of the modular implant and a neck engagement feature for engaging a neck component of the modular implant, the second end having an impaction feature for applying a force to the instrument, the stem engagement feature and the neck engagement feature being configurably disposed so as to maintain a separation between the neck component and the stem component so as to permit rotational positioning of the neck component and the stem component relative to one another.   
     
     
         32 . An instrument for inserting a modular implant, the instrument comprising:
 a first end and a second end, the first end having a stem engagement feature for engaging a stem component of the modular implant and a main implant engagement feature for engaging the main component of the modular implant, the second end having an impaction feature for applying a force to the instrument, the stem engagement feature and the main implant engagement feature being configurably disposed so as to maintain a separation between the main implant component and the stem component so as to permit rotational positioning of the main implant component and the stem component relative to one another.