Yang Hongye, Chen Zhiyong, Yan Huiyi, Huang Cui
The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedical Ministry of Education, School and Hospital of Stomatology, Wuhan University.
College of Stomatology, Guangxi Medical University.
Dent Mater J. 2018 Jan 30;37(1):122-129. doi: 10.4012/dmj.2017-006. Epub 2017 Nov 23.
This study aimed to evaluate the effects of two calcium-containing desensitizing pastes on the bonding stability of an etch-and-rinse (E&R) adhesive to dentine. After dentine hypersensitivity model established, dentine surfaces were assigned one of the following pretreatment: Group 1, no desensitizer; Group 2, CPP-ACP; and Group 3, Novamin. Specimens were then bonded with an E&R adhesive. Beams from each tooth were randomly divided into three subgroups and then subjected to microtensile bond strength (MTBS) test after 24 h; 12 months of water storage; or 15 runs of pH cycling. Failure modes, nanoleakage, and tubule-occluding effectiveness were analyzed. Results showed that CPP-ACP- or Novamin-pretreated specimens mainly preserved the bonding strength after 12 months of water storage, while effective tubule occlusion could be observed. The results suggested that the calcium-containing desensitizers were compatible pretreatment for bonding with E&R adhesives to obtain reliable long-term bonding strength and prevention of post-operative sensitivity.
本研究旨在评估两种含钙脱敏糊剂对酸蚀冲洗（E&R）型粘结剂与牙本质粘结稳定性的影响。建立牙本质过敏模型后，牙本质表面进行以下预处理之一：第1组，不使用脱敏剂；第2组，酪蛋白磷酸肽无定形磷酸钙（CPP-ACP）；第3组，诺瓦敏（Novamin）。然后用E&R粘结剂进行粘结。将每颗牙齿的梁随机分为三个亚组，在24小时后、储存12个月的水后或进行15次pH循环后进行微拉伸粘结强度（MTBS）测试。分析了失败模式、纳米渗漏和小管封闭效果。结果表明，经CPP-ACP或诺瓦敏预处理的标本在储存12个月的水后主要保持了粘结强度，同时可以观察到有效的小管封闭。结果表明，含钙脱敏剂是与E&R粘结剂粘结的相容预处理方法，以获得可靠的长期粘结强度并预防术后敏感性。
