聚合瓷表面不同处理方式对其与金属托槽粘接效果的影响

摘要

目的 探讨4种不同表面处理方式对聚合瓷与金属托槽粘接效果的影响.方法 制作45个聚合瓷试件块,从中挑选40个并根据表面处理方式的不同随机分为5组.A组:不做任何处理;B组:采用质量分数为9.6％的氢氟酸凝胶酸蚀;C组:质量分数为9.6％的氢氟酸凝胶酸蚀后联合涂布硅烷偶联剂;D组:质量分数为35％的磷酸凝胶酸蚀;E组:质量分数为35％的磷酸凝胶酸蚀后联合涂布硅烷偶联剂,各组处理后与金属托槽粘接.试件置入37℃恒温水浴箱内24 h,随后进行冷热水温度循环500次(5～55℃),完成后取出试件测量抗剪切强度,并统计剪切后试件块表面材料破损情况及粘接剂残留指数(adhesive remnant index,ARI).结果 各组抗剪切强度值分别为:对照组为3.24 MPa、氢氟酸酸蚀处理组为7.24 MPa、氢氟酸联合涂布硅烷偶联剂组为10.78 MPa、磷酸酸蚀组为4.17 MPa、磷酸联合涂布硅烷偶联剂处理组为6.84 MPa,各组间抗剪切强度比较均有统计学差异(P＜ 0.001).氢氟酸联合涂布硅烷偶联剂组在去粘接后聚合瓷折裂率较其它四组高.结论 质量分数为35％的磷酸联合使用硅烷偶联剂处理聚合瓷表面,既达到临床所需有效粘接强度,又在去粘接后减少聚合瓷破损率,故临床推荐使用.%Objective To analyze and discuss the effect of 4 different surface treatment methods on the bonding effect between polymerization porcelain and metal brackets.Methods 45 polymer-ceramics specimens were made and 40 of them were selected and randomly divided into 5 groups according to different surface treatment methods.A group:surface without special treatment.B group:9.6％ hydrofluoric acid gel combine with bonding agent,C group:9.6％ hydrofluoric acid gel combine with silane,D group:35 ％ phosphoric acid gel combine with bonding agent,E group:35 ％ phosphoric acid gel combine with silane.All specimens were stored in water for 24 hours at 37 ℃ after bonding 10 min utes and then cycled 500 cycles (5 ℃ to 55 ℃).To measure the shear bonding strength and record the damage cases and the adhesive remnant index.Results The shear strength values were:3.24 in the control group,7.24 MPa in the hydrofluoric acid etching treatment group.10.78 MPa in the hydrofluoric acid gel combined with silane group.4.17 MPa in the phosphoric acid-only group,6.84 MPa in the phosphoric acid gel combined with silane group.The results of each group were statistically different from those of the other four groups (P ＜ 0.001).The rate of breakage after the removal of brackets of the hydrofluoric acid gel combined with silane group is higher than the others.Conclusion As to the high shear bonding strength and low rate of breakage after the removal of brackets,we recommend 35％ phosphoric acid etching combining with silane coupling agent in clinical.