摘要
目的:观察根管牙本质表面在壳聚糖纳米颗粒与交联剂碳二亚胺(EDC)预处理后对于纤维桩粘接质量的影响。方法:38颗单根牙齿在进行根管治疗后进行桩道预备,以UNI-ETCH(Bisco)酸蚀,其中2颗牙根进行壳聚糖预处理后进行显微电镜观察,其余随机分为三组:a.浸泡在2.5%戊二醛24h;b.壳聚糖纳米颗粒在超声作用下60s后再浸泡于EDC中24h;c.不做预处理(对照组)。之后各组试件涂布All bond-3粘接剂,进行纤维桩粘接,分别观察粘接界面、评价粘接界面的聚合转化率以及胶原酶降解前后的粘接强度。结果:根管内壁表面预处理对于纤维桩的粘接强度的抗酶解性具有显著影响,但对于聚合转化率无明显影响(P=0.552)。酶水解对于各组的粘接强度均有显著降低(P=0.001),尤其对照组。结论:壳聚糖纳米颗粒结合交联剂碳二亚胺作用于根管牙本质可以降低胶原降解,提高粘接界面的稳定度,而不影响粘接剂的固化。
Objectives:To observe the dentin surface in root canals after pretreatment of chitosan-nanoparticles in combination with crosslinker carbodiimides in the adhesive procedure,and study their influence on the bonding quality of fiber posts in the root canals.Methods:48 teeth with single root canal were prepared endodontically and etched using UNI-ETCH(Bisco)as the adhesive procedure of fiber posts.They were randomly divided into three groups before adhesive(All-Bond 3)application.The root canals were a.immersed into 2.5%glutaraldehyde for 24 h;b.treated with Csnp solution under UA for 60 s and then immersed into EDC crosslinker for 24 h;c.without treatment as control.The bond strength and the degree of conversion within the interface was evaluated.Results:The pretreatments exert significant effect on the bonding stability of fiber post in root canals,but not to the degree of conversion(P=0.552).Enzymatic hydrolysis has significant influence to bond strength for all the groups(P=0.001),especially for group c.Conclusions:Binding Csnp onto dentin in combination with EDC reduced degradation and improved the stability within the adhesive interface,without affecting the adhesive polymerization.
作者
熊洁
谌礼佩
江青松
XIONG Jie;SHEN Li-pei;JIANG Qing-song(Department of Prosthodontics,Beijing Stomatological Hospital,Capital Medical University,Beijing 100050,China)
出处
《口腔颌面修复学杂志》
2020年第3期148-151,共4页
Chinese Journal of Prosthodontics
基金
国家自然科学基金(项目编号:No.81600892)
