Accuracy evaluation of a new three-dimensional reproduction method of edentulous dental casts, and wax occlusion rims with jaw relation

Abstract

A new method for creating three-dimensional images of dental casts, bite blocks and jaw alignments could pave the way for better-fitting dentures. Pei-Jun Lü and his colleagues at Peking University’s Center of Digital Dentistry in China fabricated standard dental restoration molds from 10 people who had previously had all their teeth extracted. They then used a laser scanner and reverse-engineering software to make computerized renderings of the restoration molds. To test the accuracy of the method, the researchers measured the lengths of eight lines between common anatomical landmarks on the casts and so-called ‘occlusion rims’. They found that the digital drawings were generally within 0.04 millimeters of their true values, as measured with calipers. Notably, the images could be analyzed in three dimensions and visualized from different angles, allowing for computer-aided design of denture prosthetics.

Keywords

accuracy / computer-aided design/computer-aided manufacturing / complete denture / jaw relation / line laser scanner / reverse engineering software

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