中国实用口腔科杂志

中国实用口腔科杂志 ›› 2010, Vol. 3 ›› Issue (10): 604-606.

• 论著 • 上一篇    下一篇

冷热循环对两种复合树脂黏结后抗剪切强度影响的研究

  

  1. 福建医科大学附属口腔医院，a.牙周科，b.预防科，福州  350002
  • 收稿日期:2010-08-05 修回日期:2010-09-21 出版日期:2010-10-15 发布日期:2010-11-03

  • Received:2010-08-05 Revised:2010-09-21 Online:2010-10-15 Published:2010-11-03

摘要：

目的    评价不同冷热循环次数对两种复合树脂黏结后抗剪切强度的影响。方法     选择2009年4月至2010年3月于福建医科大学附属口腔医院牙周科因牙周疾病拔除的恒磨牙60颗，根据单纯随机原则分为两组。Solitaire2组（30颗牙）以Solitaire2复合树脂黏结；Filtek P60组（30颗牙）以Filtek P60复合树脂黏结。每颗牙利用颊、舌、近中、远中4个面，在相应牙面的冠中1／3平整处，制作直径2 mm，高3 mm的圆柱体，每组有40个面的试件，共240个试件。两组牙齿再均分为3组，分别经0次、100次和500次冷热循环（5℃和55℃）后，测定各组样本的抗剪切力，计算抗剪切强度。并在体视显微镜下观察受检试件断面的断裂类型。结果    两种品牌的复合树脂冷热循环0次和100次的抗剪切强度差异无统计学意义（P > 0.05）；冷热循环500次时，Filtek P60树脂黏结的抗剪切强度大于Solitaire 2树脂（P < 0.05）。各组的树脂黏结断裂模式差异无统计学意义（P > 0.05）。结论    冷热循环处理使复合树脂材料的抗剪切强度降低。冷热循环500次时，Solitaire2复合树脂黏结抗剪切强度比Filtek P60复合树脂下降明显。

关键词: Solitaire2复合树脂, Filtek P60复合树脂, 冷热循环, 抗剪切强度

Abstract:

Objective    Evaluate the shear bond strength of different hot and cold cycles on the different brands of composite resin. Methods    Select 60 molars extracted due to periodontal diseases from April 2009 to March 2010 from Department of Periodontics，Stomatological Hospital，Fujian Medical University. According to the principle of the simple random selection，the 60 permanent molars were divided into two groups：Solitaire2 group（30 teeth）by Solitaire2 composite resin bonding，and Filtek P60 group（30 teeth）by Filtek P60 composite resin. Each tooth using buccal，lingual，mesial，distal four side in the corresponding tooth crown，produce diameter of 2 mm，3 mm high cylinder at 1／3 of the formation of crown，each of 40 surface samples，a total of 240 specimens. Each group was divided into 3 groups respectively，with composite resin Solitaire2 and Filtek P60，after 0，100 and 500 thermal cycles （5℃ and 55℃），observe the shear bond strength of samples of each group，calculate the shear strength. And the type of specimen fracture section was observed under stereo microscope. Results    For two brands of composite resin，thermal cycles between 0 and 100 times，the difference of  the shear strength was not statistically significant（P > 0.05）；for 500 hot and cold cycles，shear bond strength of Filtek P60 resin was greater than that of Solitaire2 resin （P < 0.05）. The resin bond fracture mode of each group had no significant difference（P > 0.05）. Conclusion    The hot and cold cycles of composite resin material has impact on shear bond strength. When 500 thermal cycles，shear bond strength of Solitaire2 composite resin is significantly lower than Filtek P60.

Key words: Solitaire2 composite resin；Filtek P60 composite resin；psychro-thermal cycles；shear bond strength