Effect of using teeth positioning guides on the accuracy of CAD/CAM complete dentures: an in-vitro study

Document Type : Original articles

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1 Resident at the Removable prosthodontics, faculty of dentistry, ainshams university, Cairo, Egypt

2 Assistant professor of removable prosthodontics, Faculty of Dentistry, Ain Shams University.

3 faculty of dentistry ain shams university egypt

Abstract

The purpose of this study is to evaluate the effect of using teeth positioning guides on the accuracy of CAD/CAM complete dentures.
Materials and methods: Twelve denture bases were digitally designed using the Exocad software and 3D printed upon an educational maxillary edentulous model. In group I, six printed upper complete dentures were fabricated, and the teeth were manually positioned in the recesses of the denture bases, while in group II, six printed upper complete dentures were fabricated, and the teeth were positioned in the recesses of the denture bases using a teeth positioning guide.
Results: Group II showed higher deviation and less accuracy when compared to group I regarding the accuracy of the positions of the centrals and the first molars. The differences between both groups were statistically significant.
Conclusion: The accuracy of the teeth positions in printed complete dentures was reduced by the use of teeth positioning guides.

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