Journal of Prevention and Treatment for Stomatological Diseases ›› 2016, Vol. 24 ›› Issue (5): 280-282.doi: 10.12016/j.issn.2096-1456.2016.05.004

Special Issue: 11

• Basic Study • Previous Articles     Next Articles

The influence of the air abrasion on the resin filling microtensile bond strength of deciduous tooth

YAN Zhi-qi,YE Mei(),YAN Xue-min   

  1. Jiangning Maternal and Child Health Hospital, Nanjing 211100, China
  • Received:2015-10-30 Revised:2015-12-20 Online:2016-05-20 Published:2016-05-20
  • Contact: Mei YE E-mail:1207008297@qq.com

Abstract:

Objective To investigate the influence of the air abrasion on the resin filling microtensile bond strength of deciduous tooth. Methods 24 primary molars were randomly divided into 2 groups. Crown enamel was removed to expose dentin. Superficial occlusal dentin were prepared by air abrasion or high-speed dental bur. Two samples were selected from each group. One of them was directly observed by scanning electron microscope (SEM) and the other was observed by SEM after etching. The rest of samples were restored with the composite resin. Microtensile test was used to examine the microtensile bond strength. Results The microtensile bond strength of air abrasion group was (24.470±3.194) Mpa, which was statistically higher than that of high-speed dental bur group (22.294±2.268) Mpa (P<0.05). The tooth prepared by air abrasion with etching showed the characteristic of "honeycomb" pattern in SEM micrograghs, while the tooth in the control group showed a shallow shape. Conclusion Air abrasion preparation can improve the microtensile bond strength in dentin restorations with the composite resin.

Key words: Air abrasion, Microtensile bond strength, Primary molar, SEM, Composite resin restoration

CLC Number: 

  • R781.05
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