Evaluation of Accuracy for Digital Tooth Preparation Guidance Technology

doi:10.13701/j.cnki.kqyxyj.2023.05.014

Abstract

Abstract: Objective: To compare the accuracy of digital tooth preparation guidance technique with traditional tooth preparation techniques at different stages. Methods: The virtual diagnostic wax-up was printed into 20 resin models by 3D printing and divided into 4 groups. Group 1: use free-hand for tooth preparation; group 2: use a three-stage indicator template to guide the tooth preparation; group 3: use a self-limiting diamond burs to guide the tooth preparation; and group 4: use a rigid-constraint template to guide the tooth preparation. The models data were imported into the measurement software and matched with the virtual diagnostic wax-up to measure the depth of the indicator and tooth preparation. Results: The deviations of the indicator depth in the four groups were (76±19) μm, (95±17) μm, (65±14) μm, and (54±15) μm, respectively (P＜0.0001). The deviations of the preparation depth were (151±22) μm, (129±21) μm, (102±22) μm, and (78±17) μm, respectively (P<0.0001). The loss of tooth tissue was different among four tooth preparation methods (P<0.05). Conclusion: The accuracy of digital tooth preparation guidance technique is higher than that of traditional non-quantitative tooth preparation guidance techniques in all stages of tooth preparation. Either method has additional tissue loss during the finishing stage.

Key words: porcelain veneer, restoration space, guidance technique, accuracy

CHEN Liang, ZHANG Xinyi, XING Zhenquan, LI Xin. Evaluation of Accuracy for Digital Tooth Preparation Guidance Technology[J]. Journal of Oral Science Research, 2023, 39(5): 450-454.

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