A simplified method to assess precision of fit between framework and supporting implants: a preliminary study.
OBJECTIVE
To present a simplified method for assessment of precision of fit between screw-retained frameworks and supporting implants in clinical situations.


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.


CONCLUSIONS
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.
Calderini
Angelo
A
Department of Oral Surgery, School of Dentistry, University of Milan, Italy. angelocalderini@tiscali.it
Maiorana
Carlo
C
Garlini
Giuliano
G
Abbondanza
Tommaso
T
D000368:Aged; D017076:Computer-Aided Design; D000044:Dental Abutments; D003735:Dental Casting Technique; D015921:Dental Implants; D003764:Dental Materials; D019094:Dental Prosthesis, Implant-Supported; D012994:Dental Soldering; D003779:Denture Design; D003781:Denture Retention; D005240:Feasibility Studies; D006801:Humans; D007834:Lasers; D008297:Male; D010865:Pilot Projects; D017755:Prosthesis Fitting / Q000295:instrumentation / Q000379:methods; D015203:Reproducibility of Results; D013499:Surface Properties; D014025:Titanium; D019415:Torque
D015921:Dental Implants; D003764:Dental Materials; D014025:Titanium