Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (16): 3033-3036.doi: 10.3969/j.issn.1673-8225.2011.16.044

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Bond strength of seventh generation adhesives to normal and caries-affected dentine

Wang Qing, Deng Jing, Fan Chun   

  1. The Affiliated Hospital of Medical College, Qingdao University, Qingdao  266003, Shandong Province, China
  • Received:2010-12-22 Revised:2011-02-19 Online:2011-04-16 Published:2013-11-11
  • Contact: Deng Jing, Master, Chief physician, the Affiliated Hospital of Medical College, Qingdao University, Qingdao 266003, Shandong Province, China dengjing3333@163.com
  • About author:Wang Qing★, Studying for master’s degree, the Affiliated Hospital of Medical College, Qingdao University, Qingdao 266003, Shandong Province, China wangqing2211@126.com

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Abstract:

BACKGROUND: Researchers in China and abroad have done a lot of experiments to study the bond strength of dentine adhesives from generation one to six, which have received satisfied results. However, there are still no reports about the bond strength of the seventh generation adhesive (Adper EasyTM one).
OBJECTIVE: To evaluate the bond strength of the Adper EasyTM one to normal dentine and caries-affected dentine, and to compare the results with total-etching adhesives.
METHODS: A total of 12 healthy posterior teeth were randomly divided into group A and B; 12 posterior teeth with chronic occlusal caries were divided into group C and D. Adper EasyTM one was applied for group A and C, while Single bond 2 for group B and D. The modes of group A, B, C, D were subjected to microtensile bond strength test. Interfacial morphologies were analyzed by Stereo-Microscopy. 
RESULTS AND CONCLUSION: The microtensile bond strength of group A and B was (21.84±3.98), (27.10±4.85) MPa, which was (16.44±3.46) and (21.48±4.85) MPa in the group C and D. The differences between group A and B, group C and D, group A and C, as well as group B and D were statistical significant (P < 0.05). Failures mostly occur along the resin-dentine interface. The total-etching adhesives performed more effectively to both normal dentine and caries-affected dentine than Adper EasyTM one. For the same adhesive, the healthy dentine yielded higher bond strength than the caries-affected dentine.

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