Chinese Journal of Tissue Engineering Research ›› 2012, Vol. 16 ›› Issue (16): 2947-2950.doi: 10.3969/j.issn.1673-8225.2012.16.023

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Histological evaluation of three commonly used light-cured resin composite materials in the wedge-shaped defect repair of extracted teeth  

Wang Xue-mei1, Wu Wei-wei2, Gao Mei-zhen2, Zhao Zhong2, Yu Zhan-hai1   

  1. 1School of Stomatology, 2School of Physical Science and Technology, Lanzhou University, Lanzhou  730000, Gansu Province, China
  • Received:2011-10-25 Revised:2011-12-07 Online:2012-04-15 Published:2012-04-15
  • Contact: Corresponding author: Yu Zhan-hai, Doctor, Professor, School of Stomatology, Lanzhou University, Lanzhou 730000, Gansu Province, China yuzhanhai@ lzu.edu.cn Corresponding author: Zhao Zhong, Doctor, Associate professor, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu Province, China zhaozh@lzu.edu.cn
  • About author:Wang Xue-mei, Lecturer, School of Stomatology, Lanzhou University, Lanzhou 730000, Gansu Province, China wangxuemei@ lzu.edu.cn

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Abstract:

BACKGROUND: Extending the service life of dental biomaterials is the concern of today's dental therapeutics and materials science.
OBJECTIVE: To evaluate the repairing effects of three kinds of light-cured resin composite materials on wedge-shaped defects.
METHODS: A unified modeling was performed on the in vitro models of isolated teeth. Scanning electron microscope was used to observe the bonding interface of the materials and dental body after filling by the three repairing materials (3MZ350 resin, 3M fluid resin and P90 resin).
RESULTS AND CONCLUSION: All three materials showed a reasonably good tooth-bonding property. In the 3MZ350 group, microfissures were usually found in the adhesive layer, and cavity might be found as well; in the P90 group, failure cracks were found on the resin side. The failure cracks of the fluid resin were small; this might be related to the fluidity. These findings indicate that all the three materials can be directly used for filling; adhesive with good edge sealing performance can effectively reduce the micro leakage of the composite resin-teeth interface and increase the restoration success.

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