US2011229838A1PendingUtilityA1

Orthodontic composition with polymeric fillers

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Assignee: KALGUTKAR RAJDEEP SPriority: Oct 1, 2007Filed: Sep 19, 2008Published: Sep 22, 2011
Est. expiryOct 1, 2027(~1.2 yrs left)· nominal 20-yr term from priority
Inventors:Rajdeep S. KalgutkarDavid T. AmosTaun L. Mckenzie
A61K 6/17A61K 6/30A61K 6/62A61C 7/16
63
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Claims

Abstract

Orthodontic adhesives are claimed which use polymeric filler particles with defined particle size characteristics. The particle size characteristics are controlled such that these adhesives provide comparable mechanical retention and cohesive strength of conventional orthodontic adhesives when used to bond orthodontic appliances to teeth. Because polymeric fillers are generally softer than inorganic fillers, these adhesives are easier to remove from the tooth than conventional adhesives after debonding an orthodontic appliance. Embodiments of the invention include both self-curing and two-part adhesives, packaged adhesive-coated orthodontic appliances, and methods for removing a cured adhesive from a tooth surface.

Claims

exact text as granted — not AI-modified
1 . An orthodontic composition comprising:
 a hardenable component;   a hardener; and   a polymeric filler,   wherein the polymeric filler has a particle size median in a range from 6 micrometers to 18 micrometers.   
     
     
         2 . The orthodontic composition according to  claim 1 , wherein the polymeric filler is an emulsion polymer. 
     
     
         3 . The orthodontic composition according to  claim 1 , wherein the polymeric filler is a suspension polymer. 
     
     
         4 . The orthodontic composition according to  claim 1 , wherein the polymeric filler has a particle size median in a range from 7 micrometers to 17 micrometers. 
     
     
         5 . The orthodontic composition according to  claim 1 , wherein the polymeric filler has a particle size median in a range from 8 micrometers to 16 micrometers. 
     
     
         6 . The orthodontic composition according to  claim 1 , wherein the polymeric filler has a d50/d25 particle size ratio up to 2.5. 
     
     
         7 . The orthodontic composition according to  claim 1 , wherein the polymeric filler has a d50/d25 particle size ratio up to 2.0. 
     
     
         8 . The orthodontic composition according to  claim 1 , wherein the polymeric filler has a d50/d25 particle size ratio up to 1.8. 
     
     
         9 . The orthodontic composition according to  claim 1 , further comprising a silica filler. 
     
     
         10 . The orthodontic composition according to  claim 9 , wherein the silica filler is present in an amount up to 5 percent based on the overall weight of the adhesive. 
     
     
         11 . The orthodontic composition according to  claim 1 , further comprising a fluoroaluminosilicate glass filler. 
     
     
         12 . The orthodontic composition according to  claim 11 , wherein the fluoroaluminosilicate glass filler is silane treated. 
     
     
         13 . The orthodontic composition according to  claim 11 , wherein the fluoroaluminosilicate glass filler is present in an amount up to 40 percent based on the overall weight of the adhesive. 
     
     
         14 . The orthodontic composition according to  claim 11 , wherein the fluoroaluminosilicate glass filler is fluoride releasing. 
     
     
         15 . The orthodontic composition according to  claim 1 , wherein the polymeric filler is derived from at least one of: poly(methylmethacrylate), poly(styrene), or poly(styrene-ethyl methacrylate). 
     
     
         16 . The orthodontic composition according to  claim 1 , wherein the polymeric filler is present in a range from 55 percent by weight to 65 percent by weight, based on the overall weight of the adhesive. 
     
     
         17 . The orthodontic composition according to  claim 1 , wherein the polymeric filler is crosslinked. 
     
     
         18 . The orthodontic composition according to  claim 1 , wherein the hardenable component comprises a crosslinker. 
     
     
         19 . The orthodontic composition according to  claim 1 , wherein the hardenable component is present in a range from 30 to 45 percent by weight based on the overall weight of the adhesive. 
     
     
         20 . The orthodontic composition according to  claim 1 , wherein the hardenable component comprises at least one of: a urethane dimethacrylate, bis-glycidyl methacrylate, or bis-ethyl methacrylate. 
     
     
         21 . The orthodontic composition according to  claim 1 , wherein the hardener is present in a range from 1 to 2.5 percent by weight based on the overall weight of the adhesive. 
     
     
         22 . An orthodontic composition comprising:
 a hardenable component;   a hardener;   a polymeric filler, wherein the polymeric filler has a particle size median in a range from 6 micrometers to 18 micrometers; and   an inorganic filler, wherein the inorganic filler has a Mohs hardness of at least 5 and is present in an amount up to 5 percent by weight based on the overall weight of the adhesive,   wherein the adhesive is essentially free of any other inorganic fillers with a Mohs hardness of at least 5.   
     
     
         23 . An orthodontic composition according to  claim 22 , wherein the adhesive is essentially free of any inorganic filler with a Mohs hardness of at least 5. 
     
     
         24 . The orthodontic composition according to  claim 22 , wherein the polymeric filler has a particle size median in a range from 7 micrometers to 17 micrometers. 
     
     
         25 . The orthodontic composition according to  claim 22 , wherein the polymeric filler has a particle size median in a range from 8 micrometers to 16 micrometers. 
     
     
         26 . The orthodontic composition according to  claim 22 , wherein the polymeric filler has a d50/d25 particle size ratio up to 2.5. 
     
     
         27 . The orthodontic composition according to  claim 22 , wherein the polymeric filler has a d50/d25 particle size ratio up to 2.0. 
     
     
         28 . The orthodontic composition according to  claim 22 , wherein the polymeric filler has a d50/d25 particle size ratio up to 1.8. 
     
     
         29 . A two-part orthodontic adhesive comprising:
 a first adhesive composition comprising an oxidizing agent; and   a second adhesive composition comprising a reducing agent,   wherein at least one of the first adhesive composition or the second adhesive composition further comprises a hardenable component and a polymeric filler,   wherein the polymeric filler has a particle size median in a range from 6 micrometers to 18 micrometers, and   wherein the orthodontic adhesive is hardened by contacting the first adhesive composition and second adhesive composition with each other.   
     
     
         30 . The two-part orthodontic adhesive of  claim 29 , wherein the polymeric filler has a particle size median between 7 micrometers and 17 micrometers. 
     
     
         31 . The two-part orthodontic adhesive of  claim 29 , wherein the polymeric filler has a particle size median ranging from 8 micrometers to 16 micrometers. 
     
     
         32 . A packaged article comprising:
 an orthodontic appliance having a base for bonding the appliance to a tooth;   an adhesive on the base of the appliance, the adhesive comprising
 a hardenable component; 
 a hardener; 
 a polymeric filler, 
 wherein the polymeric filler has a particle size median in a range from 6 micrometers to 18 micrometers; and 
   a container at least partially surrounding the orthodontic appliance having adhesive on the base thereof.   
     
     
         33 . The packaged article according to  claim 32 , wherein the polymeric filler is an emulsion polymer. 
     
     
         34 . The article of  claim 32 , wherein the polymeric filler has a particle size median in a range from 7 micrometers to 17 micrometers. 
     
     
         35 . The article of  claim 32 , wherein the polymeric filler has a particle size median in a range from 8 micrometers to 16 micrometers. 
     
     
         36 . The article of  claim 32 , further comprising a surface in contact with the adhesive. 
     
     
         37 . A method for removing cured orthodontic composition from a tooth comprising:
 providing a tooth surface having a cured orthodontic adhesive on at least a portion thereon, the adhesive comprising a hardenable component, a hardener, and a polymeric filler,   wherein the polymeric filler has a particle size median in a range from 6 micrometers to 18 micrometers; and   applying an abrasive to the tooth surface to remove the adhesive from the tooth, wherein the abrasive has a Mohs hardness that is less than 5.   
     
     
         38 . The method according to  claim 37 , wherein the polymeric filler is an emulsion polymer. 
     
     
         39 . The method of  claim 37 , wherein the polymeric filler has a particle size median between 7 micrometers and 17 micrometers. 
     
     
         40 . The method of  claim 37 , wherein the polymeric filler has a particle size median between 8 micrometers and 16 micrometers. 
     
     
         41 . The method of  claim 37 , wherein the act of applying the abrasive is carried out with a prophy powder. 
     
     
         42 . The method of  claim 37 , wherein the act of applying the abrasive is carried out with a finishing disk. 
     
     
         43 . The method of  claim 37 , wherein the act of applying the abrasive is carried out with a finishing burr. 
     
     
         44 . The method of  claim 37 , wherein the act of applying the abrasive is carried out with a scalar.

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