[Influence of Coping Material Selection and Porcelain Firing on Marginal and Internal Fit of Computer-aided Design/computer- Aided Manufacturing of Zirconia and Titanium Ceramic Implant-supported Crowns]

Overview

Journal Hua Xi Kou Qiang Yi Xue Za Zhi

Specialty Dentistry

Date 2016 Aug 17

PMID 27526450

Citations 1

Authors

Liu Cuiling

Yang Liyuan

Gao Xu

Shang Hong

Affiliations

Soon will be listed here.

Abstract

Objective: This study aimed to investigate the influence of coping material and porcelain firing on the marginal and internal fit of computer-aided design/computer-aided manufacturing (CAD/CAM) of zirconia ceramic implant- and titanium ceramic implant-supported crowns.

Methods: Zirconia ceramic implant (group A, n = 8) and titanium metal ceramic implant-supported crowns (group B, n = 8) were produced from copings using the CAD/CAM system. The marginal and internal gaps of the copings and crowns were measured by using a light-body silicone replica technique combined with micro-computed tomography scanning to obtain a three-dimensional image. Marginal gap (MG), horizontal marginal discrepancy (HMD), and axial wall (AW) were measured. Statistical analyses were performed using SPSS 17.0.

Results: Prior to porcelain firing, the measurements for MG, HMD, and AW of copings in group A were significantly larger than those in group B (P < 0.05). After porcelain firing, the measurements for MG of crowns in group A were smaller than those in group B (P < 0.05), whereas HMD and AW showed no significant difference between the two groups (P > 0.05). Porcelain firing significantly reduced MG (P < 0.05) in group A but significantly increased MG, HMD, and AW in group B (P < 0.05) HMD and AW were not influenced by porcelain firing in group A (P > 0.05).

Conclusion: The marginal fits of CAD/CAM zirconia ceramic implant-supported crowns were superior to those of CAD/CAM titanium ceramic-supported crowns. The fits of both the CAD/CAM zirconia ceramic implant- and titanium ceramic implant-supported crowns were obviously influenced by porcelain firing.

Citing Articles

[Effect of materials and superstructure designs on the passive fit of implant-supported fixed prostheses].

Song S, Zheng Z, Yang L, Gao X Hua Xi Kou Qiang Yi Xue Za Zhi. 2019; 37(1):37-41.

PMID: 30854816 PMC: 7030732. DOI: 10.7518/hxkq.2019.01.007.

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