Effect of preparation methods on the metal-porcelain bond strength of Co-Cr alloys.

Author: Jie LIU ; Shuai CHI ; Jin XU ; Yanyan WANG ; Desong ZHAN
Publication Type:Journal Article
MeSH: Alloys; Chromium Alloys; Dental Alloys; Dental Porcelain; Lasers; Materials Testing; Metal Ceramic Alloys; Metals
From: West China Journal of Stomatology 2014;32(2):115-118
CountryChina
Language:Chinese
Abstract:
OBJECTIVETo compare the shear bond strength(SBS) of cast Co-Cr alloys and selective laser melting(SLM) Co-Cr alloys with those of dental porcelain.
METHODSA dental porcelain (Vita) was applied on cast and SLM Co-Cr alloy specimens (n = 10). SBS test was conducted, and fracture mode analysis was determined. Student's t-test by SPSS 13.0 software was employed to analyze the data.
RESULTSThe SLM Co-Cr alloy specimens had lower SBS values than the cast Co-Cr alloy specimens (P > 0.05). The metal-porcelain bond strength value of the cast group was (33.11 +/- 4.98) MPa, and that of the SLM group was (30.94 +/- 5.98) MPa. The specimens in both test groups exhibited mixed failure.
CONCLUSIONThe metal-porcelain system processed by SLM exhibit a bond strength that is similar to that of the cast group. This system also display a high precision.