GC正畸玻璃离子粘接剂不同酸蚀时间对体外氟斑牙面与金属托槽粘接强度的影响

发布时间：2018-01-29 20:11

本文关键词： 氟斑牙牙酸蚀 GC正畸玻璃离子光敏粘接剂剪切强度粘接剂残留指数(ARI)　出处：《西安交通大学学报(医学版)》2017年01期 　论文类型：期刊论文

【摘要】：目的比较GC正畸玻璃离子光敏粘接剂对氟斑牙面不同酸蚀时间与金属托槽的体外粘接强度。方法选择60颗离体氟斑牙随机分为酸蚀1min(A组)和2min(B组)组(n=30),GC正畸玻璃离子光敏粘接剂粘接直丝弓金属托槽,每组粘接剂结固5min,于24h后各取出15颗牙齿在万能材料试验机上测试去除托槽时的抗剪切强度,同时对每一牙面上的粘接剂残留指数(ARI)进行观察统计。结果 B组在5min和24h的抗剪切强度分别高于A组相应时间点的抗剪切强度,差异有统计学意义(P0.05);每组5min和24h时间点的抗剪切强度数值相比,差异无统计学意义(P0.05),且2组在2个时间点的抗前切强度值均6MPa。B组在5min和24h的ARI值与A组相应时间点的ARI值差异均有统计学意义(P0.05)。结论 GC正畸玻璃离子光敏粘接剂对氟斑牙酸蚀1min的粘接强度可得到临床正畸最低需求,如需较大正畸力时,可延长酸蚀时间至2min。
[Abstract]:Objective to compare the in vitro bonding strength of glass-ion Guang Min adhesive for dental fluorosis with different etching time and metal bracket. Methods 60 isolated fluorosis teeth were randomly divided into acid etching group (group A) and metal bracket group (group A). Group B (n = 30) and group B (n = 2). GC orthodontic glass ion Guang Min adhesive bonded straight wire arch metal brackets, each group of adhesives fixed for 5 minutes. After 24 hours, 15 teeth were taken out and the shear strength of the bracket was tested on the universal material testing machine. Results the shear strength of group B at 5 min and 24 h was higher than that of group A at 5 min and 24 h, respectively. The difference was statistically significant (P 0.05). There was no significant difference in shear strength between 5 min and 24 h time points in each group (P 0.05). There were significant differences in the ARI values between the two groups at 2 time points (6MPa.B, 5min and 24h) and the ARI values at the corresponding time points in group A (P0.05). Conclusion the adhesive strength of GC orthodontic glass ion Guang Min adhesive for 1 min of dental fluorosis can meet the minimum requirement of orthodontic therapy. If greater orthodontic force is needed, the etching time can be prolonged to 2 mins.
【作者单位】：延安大学附属医院口腔正畸科;
【分类号】：R783.5
【正文快照】： 氟斑牙特殊的釉质结构使其抗酸能力增强。传统粘接方法的托槽脱落率很高,正畸医师一直努力探索提高氟斑牙粘接强度的方法,其中牙表面处理和正畸粘接剂及其性能成为研究的热点。目前,对氟斑牙粘接剂的研究多选择树脂类粘接剂[1-2],树脂粘接剂有使托槽粘接边缘釉质脱矿现象[3],

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