@article{ZHANG2018, 
author = {Juan ZHANG and Dongjian LI and Jie JIANG and Yan SITU and Shuangshuang ZOU and Xingtao WEN},
title = {The effects of two different patterns on the precision of zirconia all-ceramic crowns},
year = {2018},
journal = {Journal of Prevention and Treatment for Stomatological Diseases},
volume = {26},
number = {4},
pages = {245-249},
keywords = {Digital impression, 3D scanner, Silicone rubber impression, Marginal adaptation, Proximal contact, Occlusal contact, Precision},
url = {https://www.sciopen.com/article/10.12016/j.issn.2096-1456.2018.04.009},
doi = {10.12016/j.issn.2096-1456.2018.04.009},
abstract = {ObjectiveThe 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.MethodsA 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.ResultsThere 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).ConclusionZirconia all-ceramic crowns with intraoral 3D scanning show excellent early clinical performance.}
}