The effects of two different patterns on the precision of zirconia all-ceramic crowns
10.12016/j.issn.2096⁃1456.2018.04.009
- Author:
ZHANG Juan
1
;
LI Dongjian
1
;
JIANG Jie
1
;
SITU Yan
1
;
ZOU Shuangshuang
1
;
WEN Xingtao
1
Author Information
1. Department of Prosthodontics, Liwan District Stomatologi⁃ cal Hospital of Guangzhou
- Publication Type:Journal Article
- Keywords:
Digital impression;
3D scanner;
Silicone rubber impression;
Marginal adaptation;
Proximal contact;
Occlusal contact;
Precision
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2018;26(4):245-249
- CountryChina
- Language:Chinese
-
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 se⁃
lected and randomly divided into two groups: a digital impression by intraoral 3D scanning group and a digital impres⁃
sion 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 con⁃
tact 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.
- Full text:两种不同模型制取方法对氧化锆全瓷冠精度的影响.pdf
