The influence of the different polishing methods on the marginal sealing property of the computer aided design and computer aided manufacture zirconium dioxide full crown

• Published in: Zhonghua kouqiang yixue zazhi Vol. 51; no. 5; p. 292
• Main Authors: Zhou, Jianying, Deng, Jiupeng, Li, Jinyuan, Wang, Jide, Shen, Baolian
• Format: Journal Article
• Language: Chinese
• Published: China 01.05.2016
• Subjects: Bicuspid; Computer-Aided Design; Crowns; Dental Enamel; Dental Instruments; Dental Leakage - diagnosis; Dental Leakage - prevention & control; Dental Polishing - methods; Dental Prosthesis Design - methods; Humans; Pit and Fissure Sealants; Random Allocation; Resin Cements; Ultrasonics; Zirconium
• ISSN: 1002-0098
• DOI: 10.3760/cma.j.issn.1002-0098.2016.05.008

To evaluate the influence of different polishing methods on marginal microleakage of zirconium dioxide full crown. Thirty extracted premolars were selected and randomly divided into three groups, A, B and C, with 10 in each group. Group A was prepared with MANI TF-13 bur completely without the treatment of shoulder. The shoulder of group B was polished with MANI TR13-EF bur after the preparation using MANI TF-13. The shoulder of group C was polished with the dental pneumatic ultrasonic hand-piece of KaVo SONICflex after the preparation using MANI TF-13 bur. Five specimens after preparation were selected in each group. Fifteen CAD/CAM zirconium dioxide full crowns have been made. The crowns were bonded using PULPDENT resin cement, and the root canals were sealed using nail polish, and apical foramen were closed using flow resin. The test-pieces have been immersed in a 3% solution of methylene blue for 24 h. The condition of shoulder marginal microleakage was observed using light stereomicroscopy and evaluated