Effect of additional firing process after sintering of monolithic zirconia crown on marginal and internal fitness
10.4047/jkap.2019.57.4.321
- Author:
Mi Sun SHIN
1
;
Hyeonjong LEE
Author Information
1. Central Dental Laboratory, Kyung Hee University Dental Hospital, Seoul, Republic of Korea.
- Publication Type:Original Article
- Keywords:
Triple-scan protocol;
3D analysis;
Monolithic zirconia crown;
Marginal fitness;
Internal fitness
- MeSH:
Crowns;
Fires;
Titanium
- From:The Journal of Korean Academy of Prosthodontics
2019;57(4):321-327
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To evaluate an effect of additional firing process after sintering of monolithic zirconia crown on marginal and internal fit through three-dimensional analysis. MATERIALS AND METHODS: Ten monolithic zirconia crowns were fabricated using titanium abutment model. Monolithic zirconia crowns were designed, milled, and sintered as a control group, and additional firing with coloring was performed as a test group. Three dimensional analysis were performed by using triple-scan protocol, and cross-section analysis on mesio-distal and disto-lingual section was evaluated to measure marginal and internal fitness. Then, three-dimensional surface difference on between two groups was evaluated (α=.05). RESULTS: There was statistically significant difference between the control group (32.0 ± 24.3 µm) and the test group (17.0 ± 10.8 µm) in the mesial axial wall (P < .02) and the control group (60.2 ± 24.3 µm) and the test group (71.8 ± 21.5 µm) in the distal axial wall (P < .01). There was no statistically significant difference at the remaining point. CONCLUSION: There was no statistical significance on the deviation of inner surface of crown according to firing number, and the results of both group were considered clinically acceptable.
