A simplified method to assess precision of fit between framework and supporting implants: a preliminary study.

PURPOSE To present a simplified method for assessment of precision of fit between screw-retained frameworks and supporting implants in clinical situations. MATERIALS AND METHODS Torque-angle signature analysis is a method for analysis of tension within a joint. The OsseoCare device developed by Nobel Biocare was utilized for the tests. Three titanium frameworks were fabricated on the same master cast according to 3 different methods: (1) 1-piece casting, (2) the CNC (computer numeric controlled) method, and (3) the CTiP (Cresco Ti Precision) method. These frameworks were used to test the device and indirectly the application of the torque-angle signature analysis technology. RESULTS The frameworks fabricated according to the CNC and CTiP methods demonstrated OsseoCare tracings similar to the reference models of passively fitting joints, while the 1-piece cast framework did not. CONCLUSION According to this pilot study, the OsseoCare device and torque-angle signature analysis proved to be feasible for clinical assessment of fit between frameworks and supporting implants.

[1]  A. Caputo,et al.  Passivity of fit and marginal opening in screw- or cement-retained implant fixed partial denture designs. , 2000, The International journal of oral & maxillofacial implants.

[2]  T. D. Taylor,et al.  Prosthodontic problems and limitations associated with osseointegration. , 1998, The Journal of prosthetic dentistry.

[3]  Torsten Jemt,et al.  Clinical experience of CNC-milled titanium frameworks supported by implants in the edentulous jaw: a 3-year interim report. , 2002, Clinical implant dentistry and related research.

[4]  Graham E. White,et al.  Osseointegrated dental technology , 1994 .

[5]  T Jemt,et al.  Precision of CNC-milled titanium frameworks for implant treatment in the edentulous jaw. , 1999, The International journal of prosthodontics.

[6]  T Jemt,et al.  Photogrammetric measurements of implant positions. Description of a technique to determine the fit between implants and superstructures. , 1994, Clinical oral implants research.

[7]  A Lindberg,et al.  The CrescoTi Precision method: description of a simplified method to fabricate titanium superstructures with passive fit to osseointegrated implants. , 1999, The Journal of prosthetic dentistry.

[8]  C Bessing,et al.  Loose gold screws frequently occur in full-arch fixed prostheses supported by osseointegrated implants after 5 years. , 1994, The International journal of oral & maxillofacial implants.

[9]  T. Jemt.  How do you test a cast framework fit for a full-arch fixed implant-supported prosthesis? , 1994 .

[10]  Toshiyuki Takahashi,et al.  Fit of implant frameworks: an in vitro comparison between two fabrication techniques. , 2003, The Journal of prosthetic dentistry.

[11]  M. Augthun,et al.  The influence of spruing technique on the development of tension in a cast partial denture framework. , 1994, The International journal of prosthodontics.

[12]  B R Lang,et al.  Measuring fit at the implant prosthodontic interface. , 1996, The Journal of prosthetic dentistry.

[13]  T. Dérand,et al.  Description and evaluation of a simplified method to achieve passive fit between cast titanium frameworks and implants. , 1998, The International journal of oral & maxillofacial implants.