West China Journal of Stomatology ›› 2012, Vol. 30 ›› Issue (4): 343-345.doi: 10.3969/j.issn.1000-1182.2012.04.003

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Bond strength evaluation of four adhesive systems to dentin in vitro

Xiao Ximei1,2, Xing Lu3, Xu Haiping1,2, Jiang Zhe1,2, Su Qin1,   

  1. 1. State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China; 2.Dept. of Endodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China; 3. Dept. of Endodontics, Tianjin Stomatological Hospital, Tianjin 300041, China
  • Received:2011-09-19 Revised:2012-03-09 Online:2012-08-01 Published:2012-08-01

Abstract:

Objective To compare the adhesive strength and observe the bonding interface. According to statistic analysis and scanning electron microscope(SEM) observation, the resistance capacity of four adhesive systems is evaluated. Methods Prime & Bond NT(PBNT), Tetric N-Bond(TNB), Clearfil SE Bond(CSEB), G Bond(GB) were bonded to the occlusal surfaces and mesial surfaces of third molars respectively. The mesial resins received shear force experiment and the fracture load were recorded. The tensile bond strength(TBS) of the remaining parts were tested. The interfacial configuration were observed under SEM. Results In the shear bond strength(SBS) experiment, PBNT and TNB showed the best result, but there was no significant difference between them(P>0.05). The SBS of PBNT was stronger than that of CSEB and GB(P<0.05). The SBS of TNB was stronger than that of GB(P<0.05). There was no
significant difference between TNB and CSEB(P>0.05). In accordance with the shear force result, the TBS of PBNT and TNB was larger than CSEB and GB(P<0.05). Under SEM, resin tags of PBNT and TNB were longer and slender, the bonding layer was thick. Resin tags of CSEB were shorter, the ones of GB were the fewest and shortest. Conclusion Compared to self-etching system, total-etching system could reach better bonding strength. There is some connection between the interfacial configuration of adhesives and bond strength of them.

Key words: dentin, adhesive, etching, tensile bond strength, shear bond strength