不同方式处理唾液污染复合树脂对其粘接强度的影响

Effect of different treatment methods on adhesion strength of salivary contaminated composite resin

目的 比较观察复合树脂充填过程中受到唾液污染,采用不同方式处理污染界面对复合树脂的粘接强度的影响,以期为临床复合树脂充填中受到唾液污染的最佳处置提供实验数据和临床参考。方法 选用Beautifil Flow Plus F00流动树脂固化制备成3mm×3mm×5mm的树脂块,A组:不做表面处理;B组:唾液污染,吹干;C组:唾液污染,冲洗吹干;D组:唾液污染,75%酒精擦拭;E组:唾液污染,35%磷酸处理,吹干。以上各组于电子显微镜下观察树脂表面的情况。后续实验情况:A组直接进行树脂块粘接(定为A1组);B、C、D、E组涂布粘接剂后,再进行树脂块粘接(定为B1组、C1组、D1组、E1组);最后进行实验检测。A、B、C、D、E组扫描电镜观察各组树脂块的表面形态;A1组、B1组、C1组、D1组、E1组染料渗入法处理后,在体式显微镜下观察各组树脂粘接界面微渗漏深度;同时采用微拉伸试验检测各组树脂间粘接的强度。所得实验结果进行统计学分析。结果 (1)扫描电镜结果显示:A组、E组的树脂块粘接界面可见明显的裂隙和不规则陷窝,而B、C、D组树脂块的表面相对光滑;(2)微渗漏检测结果:A1组微渗漏深度最小,E1组与A1组差异无统计学意义,但均小于B1、C1、D1组,差异有统计学意义(P<0.05);(3)拉伸强度检测结果:A1组拉伸强度稍高于E1组,差异无统计学意义;但拉伸强度均高于B1、C1、D1组,差异有统计学意义(P<0.05)。结论 唾液污染会明显降低复合树脂间的粘接强度,经35%磷酸酸蚀和粘接系统处理后,微渗漏和粘接强度均能明显改善;35%磷酸酸蚀、粘接系统应用的处理方法基本能消除唾液污染对于树脂间粘接的影响,单纯吹干、流动水冲洗、75%乙醇擦拭不能消除唾液污染的影响。

Objective To study the composite resin contaminated by saliva, and use different methods to deal with the influence of the contaminated interface on the bonding strength of the composite resin, in order to provide experimental data and clinical reference for the best disposal of the saliva contaminated by clinical composite resin filling.Methods We Choose Beautifil Flow Plus F00 flowable resin to solidify into a 3mm ×3mm ×5 mm resin block,Group A: No surface treatment;Group B: saliva pollution, blow dry;Group C: saliva pollution, rinse and blow dry;Group D: Saliva contamination, wipe with 75% alcohol;Group E: Saliva contamination, 35% phosphoric acid treatment, and blow-dry;the above groups were observed under an electron microscope to observe the resin surface.The follow-up experiments: Group A directly bonded with resin blocks(determined as A1 group);After applying adhesive in groups B, C, D, and E, resin block bonding is carried out(determined as group B1, C1, D1,and E1);finally, experimental testing is carried out. Groups A, B, C, D, and E observed the surface morphology of the resin blocks of each group;Group A1, B1, C1, D1 and, E1 were dyed infiltration treatment, then observed the resin adhesion of each group under a stereo microscope Micro-leakage depth at the interface;at the same time, a micro-tensile test is used to detect the bonding strength between the resins of each group. The experimental results obtained were analyzed statistically. Results(1) Scanning electron microscopy results showed that there were obvious cracks and irregular dimples at the bonding interface of the resin blocks of groups A and E, while the surfaces of the resin blocks of groups B, C, and D were relatively smooth.(2) Microleakage detection results: The depth of microleakage in group A1 is the smallest. There is no statistically significant difference between group E1 and group A1, but they are all smaller than groups B1, C1, and D1, and the difference is statistically significant(P <0.05).(3) Tensile strength test results: the tensile strength of group A1 was slightly higher than that of group E1, and the difference was not statistically significant;However, the tensile strength was higher than that in B1, C1 and D1 groups(P <0.05). Conclusion Saliva contamination can significantly reduce the bonding strength between composite resins. Micro leakage and bonding strength can be significantly improved after 35% phosphoric acid etching and bonding system treatment;The treatment method of 35% phosphoric acid etching and bonding system can basically eliminate the influence of saliva pollution on the bonding between resins. Simple drying, flushing with flowing water and wiping with 75% ethanol can not eliminate the influence of saliva pollution.