Subtractive versus additive indirect manufacturing techniques of digitally designed partial dentures
Ahmed Mamdouh Snosi, Shaimaa Lotfy, Yasmine Thabet, Marwa Ezzat Sabet, Fardos N Rizk
Abstract
PURPOSE: study was to evaluate the accuracy of digitally designed removable partial denture (RPD) frameworks, constructed by additive and subtractive methods castable resin patterns, using comparative 3D analysis. MATERIALS AND METHODS: value ≤ .05 was considered statistically significant. RESULTS: Regarding the accuracy of the occlusal rests, group A (milled) (0.1417 ± 0.0224) showed significantly higher accuracy than group B (printed) (0.02347 ± 0.0221). The same results were found regarding the 3D comparison of the overall accuracy, in which group A (0.1501 ± 0.0205) was significantly more accurate than group B (0.179 ± 0.0137). CONCLUSION: In indirect fabrication techniques, subtractive manufacturing yields more accurate RPDs than additive manufacturing.