Chinese Journal of Tissue Engineering Research ›› 2012, Vol. 16 ›› Issue (47): 8783-8786.doi: 10.3969/j.issn.2095-4344.2012.47.010

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Dental resistance of resin inlays with etched enamel bonding

Xie Fu-qiang1, Jie Wei-bo1, Liu Guo-hua1, Sun Jian1, Li Zhen2   

  1. 1Department of Stomatology, the Second Affiliated Hospital of Lanzhou University, Lanzhou 730030, Gansu Province, China
    2State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu Province, China
  • Received:2012-03-02 Revised:2012-04-24 Online:2012-11-18 Published:2013-03-15
  • Contact: Jie Wei-bo, Attending physician, Department of Stomatology, the Second Affiliated Hospital of Lanzhou University, Lanzhou 730030, Gansu Province, China jiewb@lzu.edu.cn
  • About author:Xie Fu-qiang, Chief physician, Professor, Master’s supervisor, Department of Stomatology, the Second Affiliated Hospital of Lanzhou University, Lanzhou 730030, Gansu Province, China xiefq@lzu.edu.cn

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Abstract:

BACKGROUND: Composite inlays for repairing dental defects can reduce tooth fracture in a certain extent. But there is no report about the effect of inlays with different bonding treatments on fracture resistance of teeth.
OBJECTIVE: To understand the fracture resistance of repaired teeth after compound resin treated with different methods.
METHODS: Forty caries-free human premolars were collected for making medial-occlusal-distalholes. They were randomly divided into four groups: group 1 as control group (without repair after holes formed); group 2(filled with coke beautiful Philippine light curing composite resin inlay), group 3 (direct bonding with coke beautiful Philippine light curing composite resin inlay )and group 4 (etching bonding repaired by coke beautiful Philippine light curing composite resin inlay).
RESULTS AND CONCLUSION: ①The mechanical model of static loading experimental results: fracture load of the 2, 3 and 4 groups was higher than that of the control group (P < 0.05). There was no significant difference among the 2, 3 and 4 groups (P > 0.05), and the fracture load of group 4 was the maximal. ②The scanning electron microscope results: the fracture in group 2 located in between the dentin layer and resin, besides, there was almost no resin residue but a lot of pores. In group 3, a large number of dentin fractured with resin matrix, in addition, there was less resin residue. There were no bubbles and gaps between tooth and resin in the group 4, besides, fitted to each other and in close contact; 10, 5, 3 and 1 samples of resin cohesive fracture were found in the 1, 2, 3 and 4 groups, respectively. These findings suggest that the composite resin inlays treated with acid etching on posterior teeth surface can increase dental resistance.

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