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Publishing Language: Chinese | Open Access

The effects of two different patterns on the precision of zirconia all-ceramic crowns

Juan ZHANG, Dongjian LI, Jie JIANG, Yan SITU, Shuangshuang ZOU, Xingtao WEN( )
Department of Prosthodontics, Liwan District Stomatological Hospital of Guangzhou, Guangdong 510145, China
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Abstract

Objective

The objective of this study was to compare the early clinical effects of zirconia all-ceramic crowns using two different impression methods. Zirconia ceramic crowns were produced using digital models based on either a silicone rubber impression perfusion model in vitro or a 3D mouth scanner.

Methods

A total of 50 patients with a planned restoration of the first permanent molar with zirconia all-ceramic crowns after root canal therapy were selected and randomly divided into two groups: a digital impression by intraoral 3D scanning group and a digital impression by extraoral scanning after silicone rubber impression group. Zirconia all-ceramic crowns were created by CAD/CAM in both groups. Marginal adaptation, proximal contact, and occlusal contact were compared between groups.

Results

There was no significant difference between the two groups in marginal adaptation (P > 0.05). For proximal contact and occlusal contact, no significant differences regarding the number of cases for the criteria of level A and level B were found between two groups (P > 0.05), while the misfit value in level B was smaller in the first group than in the second group (P < 0.05).

Conclusion

Zirconia all-ceramic crowns with intraoral 3D scanning show excellent early clinical performance.

Keywords

Digital impression3D scannerSilicone rubber impressionMarginal adaptationProximal contactOcclusal contactPrecision
CLC number: R783.1 Document code: A Article ID: 2096-1456(2018)04-0245-05

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Journal of Prevention and Treatment for Stomatological Diseases
Volume 26 Issue 4,
April 2018
Pages 245-249
DOI: 10.12016/j.issn.2096-1456.2018.04.009

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Cite this article:
ZHANG J, LI D, JIANG J, et al. The effects of two different patterns on the precision of zirconia all-ceramic crowns. Journal of Prevention and Treatment for Stomatological Diseases, 2018, 26(4): 245-249. https://doi.org/10.12016/j.issn.2096-1456.2018.04.009

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Received: 18 May 2017
Revised: 10 July 2017
Published: 20 April 2018
© 2018 by Editorial Department of Journal of Prevention and Treatment for Stomatological Diseases

This article is licensed under a Creative Commons Attribution 4.0 International License.