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Accuracy of a digital removable partial denture fabricated by casting a rapid prototyped pattern: A clinical study
Jong-Won Lee1, Ji-Man Park2, Eun-Jin Park3
1Resident, Department of Prosthodontics, School of Medicine, Ewha Woman's University, Seoul, Republic of Korea.
The Journal of Prosthetic Dentistry
|April 9, 2017
Summary
This study analyzed the accuracy of digital removable partial dentures (RPDs) using electronic surveying. Results show accuracy varied, with better fit at the periphery of rests than the center.
Area of Science:
- Dental prosthetics
- Digital dentistry
- Removable partial dentures
Background:
- Limited clinical data exists on the intraoral accuracy of digitally generated removable partial dentures (RPDs).
- A larger participant pool was needed to analyze digital RPD accuracy.
Purpose of the Study:
- To evaluate the accuracy of digital RPDs using the replica technique in a clinical setting.
Main Methods:
- Digital RPDs were fabricated using electronic surveying.
- Replicas were made with silicone registration material and measured using a stereomicroscope.
- Internal discrepancy of metal frameworks was assessed in 10 participants (348 measurements).
Main Results:
- Statistically significant differences in internal discrepancy were found among framework components (P<.05).
- No significant differences were observed among participants with different Kennedy classifications (P>.05).
- Discrepancy was smaller at the periphery than the center of the rest, particularly for cingulum rests (P<.01).
Conclusions:
- Digital RPDs fabricated via electronic surveying exhibit variable accuracy.
- Accuracy of fit is superior at the periphery of rest contact positions compared to the center.