不同牙本质清洁剂对牙本质与自粘接树脂水门汀粘接强度的影响  

Effect of different dentin cleaning agents on the bond strength of self-adhesive resin cement to dentin

作　　者：焦纪兰[1] 曾利伟[1] 周灏[2] 邓璐[1] 周年苟[1] 陈萍[1] 江辉[1] 

机构地区：[1]南昌大学附属口腔医院口腔修复科,南昌330000 [2]九江学院附属口腔医院口腔正畸科,九江332000

出　　处：《华西口腔医学杂志》2015年第3期306-310,共5页West China Journal of Stomatology

基　　金：江西省卫生厅科技计划基金资助项目(20131086)

摘　　要：目的评价乙二胺四乙酸(EDTA)和次氯酸钠(NaClO)对自粘接树脂水门汀与牙本质间粘接强度的影响。方法选择新鲜无龋、无裂纹的人离体前磨牙27颗,去除颊侧釉质,暴露浅层牙本质,随机分为对照组(A组)、EDTA组(B组)和NaClO组(C组)。分别选用蒸馏水、3%EDTA溶液和1%NaClO溶液处理牙本质表面后与自粘接树脂水门汀Rely X Unicem进行粘接,将其中24个试件置于37℃生理盐水中浸泡24 h后测定剪切强度,采用SPSS 17.0统计学软件对数据进行统计分析,在扫描电镜(SEM)和体视显微镜下分别观察粘接界面及断裂模式。结果 A组与B组的剪切强度分别为(8.55±0.63)MPa和(8.47±0.56)MPa,二者间差异无统计学意义(P>0.05);C组的剪切强度为(12.97±0.59)MPa,与A组和B组间差异均有统计学意义(P<0.05)。SEM下观察可见,C组自粘接树脂水门汀Rely X Unicem与牙本质间结合紧密,但均未见树脂突,而A组与B组粘接界面均不理想。体视显微镜下观察可见,A组与B组试件破坏模式以内聚破坏为主,C组试件全部为内聚破坏。结论 1%Na Cl O处理牙本质可以提高自粘接树脂水门汀Rely X Unicem与牙本质之间的粘接强度,3%EDTA处理对提高自粘接树脂水门汀Rely X Unicem与牙本质之间的粘接强度无影响。ObjectiveThis study aims to evaluate the bond strength of a self-adhesive resin cement to dentin by ethylene-diamine tetraacetic acid （EDTA） and NaClO. Methods Twenty-seven freshly extracted non-carious human premolars were prepared to expose the buccal dentin and randomly divided into three groups： control group （A group）, EDTA group （B group） and NaClO group （C group）. All teeth were bonded to dentin using a self-adhesive resin cement after the teeth in the A group were processed with distilled water. The B and C group were processed with 3%EDTA and 1%NaClO, respectively. After 24 hours at 37 ℃ water, the shear bond strengths of the twenty-four specimens were measured. All statistical analysis was performed using SPSS 17.0 software package. Each fractured specimen was examined under dental microscope. Three new specimens were cut, and the morphologies of the cement-dentin interface were observed under scanning electron microscope （SEM）. Results The shear bond strength in the A group, B group and C group was （8.55±0.63）, （8.47±0.56） and （12.97± 0.59） MPa, respectively. The difference between A group and B group was no statistically significant （P〉0.05）, whereas the difference between C group and B group （or A group） was statistically significant （P〈0.05）. SEM observation of the cement-dentin interface in the C group showed good adaptation, but resin tags were not observed. The other two groups showed poor bonding interface. Most of the fractured adhesive dentin surfaces exhibited cohesive failure in the A group and B group. All the fractured adhesive dentin surfaces exhibited cohesive failure in the C group. Conclusion 1% NaClO can increase the bond strength of self-adhesive resin cement to dentin, but 3%EDTA has no effect.

关 键 词：乙二胺四乙酸 次氯酸钠 自粘接树脂水门汀 剪切强度 

分 类 号：R783.1[医药卫生—口腔医学]