Purpose: The purpose of this study was to investigate and compare the precision of
fabrication in repeatedly produced computer numeric controlled (CNC)–milled
frameworks with conventional castings, and to analyze the distortion from application of
different veneering materials. Materials and Methods: Twenty identical titanium
frameworks were fabricated by means of a CNC milling technique for the same master
model. Five conventional frameworks were cast as a control group to the same model.
The frames were measured with regard to fit in a coordinate measuring machine linked to
a computer. Measurements were made during different stages of handling of the titanium
framework, and after veneering materials had been applied. Results: The CNC
frameworks showed a statistically better fit and precision of fabrication compared to
conventional castings ( P< .05). The application of veneering material did not statistically
affect the fit of the titanium frameworks ( P> .05). Conclusion: It is possible to fabricate
implant-supported frameworks by means of the present CNC technique with a very high
precision and repeatability. Int J Prosthodont 2003;16:194–200.