Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (12): 2167-2170.doi: 10.3969/j.issn.1673-8225.2010.12.019

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Fatigue resistance of pulpless teeth restored with quartz-fiber post crown

Qi Li-li1, Nie Er-min1, Chen Xia-yun2, Huang Ying-he1, Liu Wei1, Zhang Chun-yuan1　   

  1. 1 Department of Stomatology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou  510080, Guangdong Province, China; 2 Department of Stomatology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou  510630, Guangdong Province, China
  • Online:2010-03-19 Published:2010-03-19
  • Contact: Zhang Chun-yuan, Master, Professor, Department of Stomatology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
  • About author:Qi Li-li★, Master, Department of Stomatology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China niean_1999@163.com
  • Supported by:

    the Social Development Project of Guangdong Provincial Science and Technology Department, No.2008B08070
    3032*

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Abstract:

BACKGROUND: Studies demonstrate that there are some effects of oral masticatory function on the fracture resistance ability of the fiber post-core prosthesis.
OBJECTIVE: To evaluate the fatigue resistance of lower premolars restored with quartz-fiber post-core and full crown.
METHODS: Totally 44 single rooted lower premolars recently extracted from orthodontic patients were divided into the experimental and the control groups, with 22 teeth in each group. All the teeth were restored with fiber post-core and full crown. In the experimental group, loads were applied at an 45° to the long axis of the teeth with a cyclic loading at a 6 Hz frequency, and then both two groups were loaded at an 45° to the long axis of the teeth at a crosshead speed of 1 mm/min. The destructive force values, the fracture mode of root and the situation of post-core dislocation with root fracture were recorded.
RESULTS AND CONCLUSION: The mean loading force was (733.88N±254.99) N and (869.14N±280.26) N in the experimental group and the control group, respectively, and there was no significant difference in two groups (P > 0.05). The experimental group had one case with vertical root fracture, the others had repairable root fracture and the dislocation of post-core did not happen in the two groups. The results demonstrated that there is a good fatigue resistance in the removed teeth with quartz-fiber post-core and full crown.

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