使用粘结剂对窝沟封闭剂渗透能力及微渗漏的影响

目的：观察在窝沟封闭中使用粘结剂对封闭剂渗透能力及微渗漏的影响。方法：选用近期因正畸需要拔除的双尖牙30颗,随机分为A、B、C组,每组10颗。A组为对照组,采用传统封闭方法。B组在酸蚀牙面上涂Du-rafill Bond釉质粘结剂后再进行封闭。C组使用Adper^TMPrompt^TM自酸蚀粘结剂涂布牙面后封闭。通过染料浸染法和光学显微镜观察封闭剂渗入窝沟的程度和微渗漏。结果：C组微渗漏和未封闭面积比均显著高于A组和B组,A组和B组间观察指标差别无显著性。结论：在窝沟封闭操作中,AdperTMPromptTM自酸蚀粘结剂不能替代磷酸酸蚀。Durafill Bond粘结剂的应用对封闭剂的微渗漏和渗透能力无明显改善。

Effect of Adhesive on Microleakage and Penetration Ability of Pit and Fissure Sealant

Objective：To evaluate the microleakage and penetration ability of pit and fissure sealant using different kinds of adhesive.Methods：Thirty human normal first upper premolars recently extracted for orthodontic reasons were randomly divided into A,B,C groups.Group A was etched with 35% phosphoric acid conventionally.Group B was applied with enamel adhesive（Durafill Bond,Heraeus Kulzer）after being eathed by 35% phosphoric acid.Group C was applied with self-each adhensive（Adper^TM Prompt^TM,3M）instead of 35% phosphoric acid,then sealed the fissures.All samples were submitted to 500thermal cycles.After staining with 2% methylene blue,the teeth were sectioned to evaluate the microleakage and penetration ability.Results：The mean percentages of dye penetration and percentages of unfilled area of group C were statistically higher than group A and B（P〈0.05）.No significant difference was found between group A and B.Conclusion：Use of ename adhesive（Durafill Band）could not improve microleakage and penetration of sealant;Self-etch adhesive（AdperTMPrompt TM）was not recommended for fissure sealing.