He Fei Bai

Institute of Porous Flow and Fluid Mechanics

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Bin Yao

Jilin University

Zhong Yi Li

Min Guo

Shandong Jianzhu University

Yong Wang

Stomatology Hospital

Yu Sun

First Automotive Works (China)

Jun Zhang

Jiangsu Institute of Parasitic Diseases

Qun Ren

Tianjin University

Yi Zhao

Qinghai University Affiliated Hospital

Weidan Ma

Shanghai Institute of Technology

Lin Liu

Northwest A&F University

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Northwestern Polytechnical University

Jilin University

Chinese Academy of Sciences

University of Science and Technology Beijing

Shanghai Institute of Technology

The Ohio State University

State Key Laboratory of Solidification Processing

State Key Laboratory of Superhard Materials

Changchun Institute of Optics, Fine Mechanics and Physics

North University of China

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Microstructures and mechanical properties of directionally solidified Al2O3/GdAlO3 eutectic ceramic by laser floating zone melting with high temperature gradient

Journal of the European Ceramic Society (2016)

Haijun Su Qun Ren Jun Zhang Kaichen Wei Bin Yao

Lamella (surface anatomy)

Directional solidification

Zone melting

Rod

Temperature Gradient

Indentation

Interphase

10.1016/j.jeurceramsoc.2016.11.041

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3D Evaluation of Accuracy of Tooth Preparation for Laminate Veneers Assisted by Rigid Constraint Guides Printed by Selective Laser Melting

The Chinese journal of dental research : the official journal of the Scientific Section of the Chinese Stomatological Association (2020)

Zhong Yi Li He Fei Bai Yi Zhao Yong Wang Hong Qiang Ye

Objective To design and fabricate 3D-printed rigid constraint guides for the tooth preparation for laminate veneers and to evaluate the accuracy of guide-assisted preparation. Methods Twenty maxillary right central incisor resin artificial teeth were randomly divided into two equal groups and prepared for laminate veneers. Tooth preparations were performed, assisted by guides in the test group and by depth gauge burs in the control group, and both were finished by freehand operation. The typodonts were 3D scanned before preparation, after initial preparation and after final preparation. The tooth preparation depths at each step, including initial preparation depth, final preparation depth and loss of tooth tissue during polishing, were measured by 3D deviation analysis. Statistical analyses were conducted to investigate differences. Results The initial preparation depth was 0.488 mm (median, quartile 0.013 mm) in the test group and 0.521 mm (median, quartile 0.013 mm) in the control group. A statistically significant difference was found between them (P 0.05). Conclusion In maxillary central incisors, the tooth preparation for laminate veneers could be conducted using 3D-printed rigid constraint guides, the accuracy of which is better than that of depth gauge burs.

10.3290/j.cjdr.a45222

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