Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (12): 2192-2194.doi: 10.3969/j.issn.1673-8225.2011.12.025

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Marginal fitness and metal-ceramic bonding strength of new CoCr alloy versus high gold alloy

Liang Rui-ying, Zhao Yan-ping, Dong Wei   

  1. Stomatology Department of North China Coal Medical University, Tangshan 063000, Hebei Province, China
  • Received:2010-10-25 Revised:2010-12-18 Online:2011-03-19 Published:2011-03-19
  • Contact: Zhao Yan-ping, Associate professor, Stomatology Department of North China Coal Medical University, Tangshan 063000, Hebei Province, China hbmyzyp@sina.com
  • About author:Liang Rui-ying★, Master, Lecturer, Stomatology Department of North China Coal Medical University, Tangshan 063000, Hebei Province, China lry110@126.com
  • Supported by:

    Tangshan Science and Technology Development Program, No.09130202A3-11*

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Abstract:

BACKGROUND: CoCr alloy, which does not include Ni or Be but contains Mo and Si, is considered appropriate to make porcelain fused to metal crown. There is no report on its marginal fitness and metal-ceramic bonding strength.
OBJECTIVE: To compare the marginal fitness and metal-ceramic bonding strength of metal-ceramic crowns with high gold alloy and new CoCr alloy.
METHODS: A total of 24 removable die were divided into two groups: high gold alloy group and new CoCr alloy group to prepare into 12 metal-ceramic crowns, respectively. Crowns were cemented by zinc polycarboxylate cement. The marginal fit was investigated by microscope after cementation. And the specimens cemented were subjected to Instron testing machine, which were placed into home-made pipes. The loads at fracture were recorded.
RESULTS AND CONCLUSION: The buccal and lingual marginal discrepancies of new CoCr alloy group were lower than high gold alloy group, but there was no statistical difference (P > 0.05). The metal-ceramic bonding strength of new CoCr alloy group was higher than that of high gold alloy group. There was no statistical difference (P > 0.05). Results indicated that new CoCr alloy matched to metal-ceramic crown.

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