Er:YAG激光对根面牙本质与玻璃离子间抗剪切强度的影响

›› 2014, Vol. 5 ›› Issue (2): 91-94.

Er:YAG激光对根面牙本质与玻璃离子间抗剪切强度的影响

章善¹,²,朱庆萍¹

1. 南京医科大学附属口腔医院特诊科
2. 南京医科大学口腔研究所

收稿日期:2014-02-10 修回日期:2014-04-13 出版日期:2014-06-25 发布日期:2014-06-23
通讯作者: 朱庆萍 E-mail:zhuqpp@163.com

Effect of Er:YAG laser irradiation on shear bond strength of glass ionomer cement to root surface dentine

¹,²,

Received:2014-02-10 Revised:2014-04-13 Online:2014-06-25 Published:2014-06-23

摘要/Abstract

摘要： 目的：研究铒：钇铝石榴石（Er:YAG）激光照射对老年人根面牙本质与玻璃离子水门汀间的抗剪切强度的影响。方法：于2013年2月至5月收集20颗老年人（≥60岁）和20颗年轻人（≤20岁）完整离体恒牙，并用金刚砂车针磨除近中釉牙骨质界部位的牙釉质及牙骨质，暴露根方牙本质。老年人牙齿随机分为G1组和G2组，年轻人牙齿随机分为M1组和M2组，每组10颗。采用不同的方式处理根面牙本质：G1组和M1组用Er:YAG激光照射，G1组和M2组仅用金刚砂车针制备。将牙齿包埋于自凝塑料，制备根面使用GC Fuji Ⅸ GP CAPSULE 玻璃离子充填。样本冷热循环后，置于万能材料试验机测定其抗剪切强度，并行统计学分析。结果：抗剪切强度比较显示：G1组>G2组，M1组>M2组，G1组>M1组，G2组>M2组（P<0.05）。结论：Er:YAG激光照射可以提高牙本质与玻璃离子间抗剪切强度；老年人牙齿可以获得比年轻人更高的抗剪切强度。

Abstract: Objective: To evaluate the effects of Er:YAG laser irradiation on shear strength between glass ionomer cement and root surface dentine in the elderly.Methods: 20 elderly people(≥ 60) and 20 young people(≤20) teeth without caries and subfissure were selected from February to May in 2013 for this study and made into specimens with exposed root dentine by cutting the enamel and dentine around the mesial enamel-dentinal junction with a diamond bur.The teeth from the elderly people were randomly divided into group G1 and group G2 and teeth from the young people were randomly divided into group M1 and M2,each group contain ten teeth.Using defferent technique to prepare the root dentine:Group G1 and group M1 using Er:YAG laser irradiation,group G2 and group M2 using diamond bur preparation. Embedding each tooth in self-curing plastic,filling with GC Fuji Ⅸ GP CAPSULE glass ionomer cement after preparing the root dentine.All specimens were tested shear strength in universal testing machine after thermocycling.Results: The comprison of shear strength showes: group G1 >group G2, group M1 >M2, group G1> M1, group G2 > M2 (P < 0.05).Conclusions: Er: YAG laser irradiation can improve the shear strength between the dentin and ionomer cement; root dentin of elderly ones obtain higher shear bond strength to ionomer cement than the ones of the young.

中图分类号:

R781.05

章善朱庆萍. Er:YAG激光对根面牙本质与玻璃离子间抗剪切强度的影响[J]. , 2014, 5(2): 91-94.

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