评估不同试剂在不同时间间隔下对牙本质进行预处理对树脂剪切粘结强度的影响。
An evaluation of effect of dentin pretreatment with various agents for varying time intervals on the shear bond strength of resin.
作者信息
Bharti Nidhi, Chandra Anil, Tikku A P, Verma Promila, Bharti Ramesh, Shakya Vijay Kumar, Bains Rhythm
机构信息
Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, King George's Medical University, Lucknow, Uttar Pradesh, India.
出版信息
J Conserv Dent. 2018 Jan-Feb;21(1):37-41. doi: 10.4103/JCD.JCD_227_16.
BACKGROUND
This article highlights the contribution of collagen structure/stability to the bond strength. We hypothesize that induction of cross-linking in dentin collagen fibrils improves dentin collagen stability and thus bond strength with composite also improves.
AIMS
The aim of the study was to evaluate the effect of collagen cross-linking agents on the shear bond strength of composite resins.
SUBJECTS AND METHODS
One hundred human permanent teeth were randomly divided into three groups: Group I ( = 20) - no dentin pretreatment done, Group II - dentin pretreatment with 10% sodium ascorbate for 5 min (IIa) and 10 min (IIb), and Group III - dentin pretreatment with 6.5% proanthocyanidin (PA) for 5 min (IIIa) and 10 min (IIIb). A composite resin was bonded on prepared surfaces and cured. Thermocycling was done, and shear bond strength of the prepared samples was tested using a universal testing machine.
RESULTS
Values of Group I (control) were lowest whereas that of Group II (sodium ascorbate) were highest. The following order of shear bond strength was observed: IIb > IIa > IIIb ~ IIIa > I. Results for sodium ascorbate were found to be time dependent, whereas for PA, differences were nonsignificant.
CONCLUSIONS
Treatment of dentinal surfaces with collagen cross-linking agent increases the shear bond strengths.
背景
本文强调了胶原蛋白结构/稳定性对粘结强度的贡献。我们假设牙本质胶原纤维中交联的诱导可改善牙本质胶原的稳定性，从而也提高与复合材料的粘结强度。
目的
本研究的目的是评估胶原交联剂对复合树脂剪切粘结强度的影响。
对象与方法
将100颗人恒牙随机分为三组：第一组（n = 20）——未进行牙本质预处理；第二组——用10%抗坏血酸钠对牙本质进行预处理5分钟（IIa）和10分钟（IIb）；第三组——用6.5%原花青素（PA）对牙本质进行预处理5分钟（IIIa）和10分钟（IIIb）。将复合树脂粘结在制备好的表面并固化。进行热循环，然后使用万能试验机测试制备样品的剪切粘结强度。
结果
第一组（对照组）的值最低，而第二组（抗坏血酸钠）的值最高。观察到以下剪切粘结强度顺序：IIb > IIa > IIIb ~ IIIa > I。发现抗坏血酸钠的结果与时间有关，而对于PA，差异不显著。
结论
用胶原交联剂处理牙本质表面可提高剪切粘结强度。
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