冷热循环对Er:YAG激光以及车针备洞后牙本质和玻璃离子粘结剪切强度的影响

发布时间：2018-07-17 04:47

【摘要】：目的:评价冷热循环对Er:YAG激光以及车针备洞后牙本质与玻璃离子粘结剪切强度的影响。方法:40个离体牙分为颊舌两半,完全去除颊舌侧牙釉质,暴露牙本质后自凝塑料包埋,制成80个试件后随机分为A、B、C、D 4组(n=20)。A组采用Er:YAG激光照射后粘结Fuji IX;B组采用Er:YAG激光照射后粘结Fuji IX,再进行12 000次冷热循环;C组采用车针预备牙本质后粘结Fuji IX;D组采用车针预备牙本质后粘结Fuji IX,再进行12 000次冷热循环。所有样本置于万能材料力学测试机进行剪切强度测试。结果:A、B、C组之间的剪切强度无显著差异(P0.05),D组剪切强度明显小于其他3组(P0.05)。结论:经过冷热循环之后,Er:YAG激光组的剪切强度未见明显变化,但车针备洞组的剪切强度明显降低。
[Abstract]:Aim: to evaluate the effect of hot and cold cycles on the bonding shear strength between dentin and glass ions after er: YAG laser and lavender. Methods: forty teeth in vitro were divided into buccal and lingual sides. Enamel of buccal and lingual side was completely removed, and self-coagulating plastic was embedded after exposure to dentin. After making 80 specimens, they were randomly divided into two groups: group A, bonded Fuji IXX by er: YAG laser irradiation, group B, after er: YAG laser irradiation, group C, with 12 000 cycles of cold and hot cycles, group C, using a car needle to prepare the dentine after bonding Fuji IXD, group B, after er: YAG laser irradiation, the Fuji IXD group was treated with Fuji IXD after irradiation by er: YAG laser. Fuji IX was bonded with the needle after dentin preparation, and 12 000 cycles of heat and cold were performed. All samples are placed in a universal material mechanics tester for shear strength testing. Results there was no significant difference in shear strength between the two groups (P0.05). The shear strength of group D was significantly lower than that of the other three groups (P0.05). Conclusion: the shear strength of er: YAG laser group did not change obviously after hot and cold cycle, but the shear strength of the car needle preparation hole group decreased obviously.
【作者单位】：佛山市第一人民医院口腔医学中心;
【分类号】：R783.1

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