Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (3): 511-514.doi: 10.3969/j.issn.1673-8225.2011.03.032

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Wear resistance and hardness of dental prosthetics materials versus native teeth

Chen Shuang, Li Guo-qiang   

  1. Department of Prosthodontics, Shanghai Stomatological Disease Center, Shanghai   200031, China
  • Received:2010-08-03 Revised:2010-09-08 Online:2011-01-15 Published:2011-01-15
  • Contact: Li Guo-qiang, Associate director, Department of Prosthodontics, Shanghai Stomatological Disease Center, Shanghai 200031, China
  • About author:Chen Shuang★, Master, Physician, Department of Prosthodontics, Shanghai Stomatological Disease Center, Shanghai 200031, China chens79@hotmail.com

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Abstract:

BACKGROUND: There are frictions between native tooth and dental prosthetics materials. In order to protect the native tooth from wear out and lengthen the in-service life of dental prosthetic restorations simultaneously, it is necessary to understand tribological characteristics between native tooth and dental prosthetics materials. Accordingly, we can select the matching prosthetics materials.
OBJECTIVE: To compare wear resistance and hardness of native teeth and dental prosthetics materials.
METHODS: A computer searched of PubMed database (http://www.ncbi.nlm.nih.gov/PubMed) and Wanfang database (http://www.wanfangdata.com.cn) from 2000 to 2010 was performed to retrieve articles about tribological characteristics between native tooth and dental prosthetics materials, with key words of “enamel, dental restorative material, zirconia, wear resistance, hardness” in English and in Chinese. A total of 46 articles were screened out, and 30 ones according to the inclusive criteria were involved for further summary.
RESULTS AND CONCLUSION: The dental enamel has excellent tribology performance and wear resistance, but the dentin has poor wear resistance, once the dentin of native teeth exposes in wearing process, the abrasion will speed up. Therefore, it is extremely necessary to chose ideal dental prosthetic restoration materials which have similar wearing characteristic with native teeth. The abradability of dental enamel is fantastically higher than composite resin. The abradability of composite resin itself is not very good, so it wears little to the native tooth. The physical performance of new type composite resin is raising up unceasingly, and the abradability of some composite resins is approaching to the enamel. The specimens made from Bayer tooth, thermosetting plastic, copper base alloy, titanium and its alloy are thus idea prosthetic materials. Zirconium ceramics belong to biological inertia ceramics, and have good biocompatibility, strong intensity and tenacity. It is a new type dental prosthetic material.

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