Clinical observation of the marginal and internal fit of titanium crowns fabricated by a selective laser mel-ting technology

VernacularTitle:选择性激光熔覆（SLM）纯钛全冠适合性的临床研究
Author: Kenan CHEN ; Jinghong MAO ; Yuqi DANG ; Bo GAO
Publication Type:Journal Article
Keywords: Selective laser melting(SLM); Crowns; Fit; CAD/CAM; 3D Printing; Clinical trial
From: Journal of Practical Stomatology 2016;32(3):317-320
CountryChina
Language:Chinese
Abstract: Objective:To compare the marginal and internal fit of selective laser melting(SLM)titanium crowns with lost-wax cast (LW)titanium crowns.Methods:Titanium crowns of 10 subjects were fabricated by SLM and conventional LW respectively(n =10).The marginal and internal gaps of the crowns were recorded with silicon film using a replica technique.Each silicon film was cut into 2 parts and the thickness of silicon layer was measured at ×100 magnification using a stereomicroscope,the data of marginal gap (MG)and internal gap(IG)were statistically analysed by ANOVA and SPSS statistical package version 17.0.Results:The MG (μm)of the titanium crowns of SLMgroup and LMgroup were 90.67 ±14.7 and 94.77 ±21.9(P <0.05),IG were 213.73 ±90.4 and 217.00 ±97.7(P >0.05),respectively.Conclusion:The marginal fit of the SLMcrowns is better than that of the LW ones,and is significantly smaller than 120 μm of the clinical generally accepted standards.