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Marginal adaptation of titanium frameworks produced by CAD/CAM techniques
C Besimo1, C Jeger, R Guggenheim
1Department of Prosthodontics, School of Dentistry, University of Basle, Switzerland.
The International Journal of Prosthodontics
|March 12, 1998
Summary
The Digitizing Computer System (DCS Production) effectively fabricates titanium copings. Computer-aided design and manufacturing achieved a mean marginal fit of 47.0 microns for veneered crowns.
Area of Science:
- Biomaterials Science
- Dental Technology
- Computer-Aided Manufacturing
Background:
- Accurate marginal fit is crucial for the longevity and function of dental restorations.
- Computer-controlled fabrication offers potential for improved precision in dental prosthetics.
Purpose of the Study:
- To evaluate the marginal fit of titanium copings fabricated using the Digitizing Computer System (DCS Production).
- To assess the accuracy of computer-controlled fabrication for dental restorations.
Main Methods:
- Acquisition of 3D crown preparation shapes using micropalpation with a contact digitizer.
- In vitro assessment of marginal fit of computer-machined titanium frameworks using scanning electron microscopy.
- Measurement of marginal gap along the finish line on 10 specimens (1,475 measurements).
Main Results:
- The mean marginal fit for individual crowns ranged from 21.2 +/- 14.6 microns to 81.6 +/- 25.1 microns.
- The overall mean marginal fit across all tested crowns was 47.0 +/- 31.5 microns.
- Computer-machined titanium frameworks demonstrated a quantifiable marginal fit.
Conclusions:
- The Digitizing Computer System (DCS Production) is a viable method for computer-controlled fabrication of titanium copings.
- The evaluated system provides acceptable marginal fit for veneered crowns in dental applications.
- Further research may explore optimization of the DCS Production for enhanced precision.