Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (12): 2159-2163.doi: 10.3969/j.issn.1673-8225.2010.12.017

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Wear resistance properties of Ti-Zr-Nb-Sn alloy for dental restoration

Hu Xin1, Wei Qiang2, Li Chang-yi1, Deng Jia-yin1, Liu Shuang1, Zhang Lian-yun1　　   

  1. 1 School of Stomatology, Tianjin Medical University, Tianjin 300070, China; 2 Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
  • Online:2010-03-19 Published:2010-03-19
  • Contact: Zhang Lian-yun, Professor, Chief physician, School of Stomatology, Tianjin Medical University, Tianjin 300070, China
  • About author:Hu Xin★, Master, Attending physician, School of Stomatology, Tianjin Medical University, Tianjin 300070, China huxin90@126.com
  • Supported by:

    Basic Application Research Project of Tianjin, No. 07JCZDJC07100*; China Postdoctoral Science Foundation, No. 200801215*; Research Fund for the Doctoral Program of Higher Education of China, No. 200800620006*

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Abstract:

BACKGROUND: Ti alloy, in particular pure titanium, was limited by poor surface firmness and wear resistance as well as mismatch to natural teeth for the application of fixed denture.
OBJECTIVE: To test and compare the wear resistance of a new Ti-Zr-Nb-Sn alloy for dental restoration.
METHODS: A loading wear test was done under an artificial saliva environment at 37 ℃ by MMV-1 Vertical universal friction and wear testing machine. Dental metal materials including pure Ti (TA2) and Ti-Zr-Nb-Sn alloy were two-body wear tested in vitro. While the natural enamel was used as control, the steatite ceramic was used as counter sample. Wear surface morphology was observed with electron microscope, debris element analysis was carried out using X-ray diffraction energy spectrometer, the rigidity value was got by micro-rigidity test device, and volume wear loss was detected using electronic balance.
RESULTS AND CONCLUSION: Volume wear loss and rigidity value of Ti-Zr-Nb-Sn alloy and natural enamel were higher than that of TA2 (P < 0.05). The main wear mechanism of Ti-Zr-Nb-Sn alloy was abrasive wear, and enamel and TA2 were adhesion and abrasive wear. Debris element analysis demonstrated that the major component of Ti-Zr-Nb-Sn alloy was Ti, Zr, and Sn, but no Nb; while, the major component of pure TA2 was Ti. Based on the current results, it was proposed that the Ti-Zr-Nb-Sn alloy had good surface wear resistance and were suitable for dental restoration application.

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