West China Journal of Stomatology

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

Liu Jie1, Chi Shuai1, Xu Jin1, Wang Yanyan2, Zhan Desong3   

  1. 1. Dept. of Prosthodontics, School of Stomatology, China Medical University, Liaoning Institute of Dental Research, Shenyang 110002, China; 2. Dept. of Analysis and Test, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; 3. Dept. of Materials, School of Stomatology, China Medical University, Liaoning In-stitute of Dental Research, Shenyang 110002, China
  • Received:2013-04-12 Revised:2014-01-09 Online:2014-04-01 Published:2014-04-01

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Abstract:

Objective   To compare the shear bond strength(SBS) of cast Co-Cr alloys and selective laser melting(SLM) Co-Cr alloys with those of dental porcelain. Methods  A 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 soft- ware was employed to analyze the data. Results   The 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. Conclusion  The 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.

Key words: Co-Cr alloy, shear bond strength, selective laser melting, casting

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