Jamali Zavare Faeze, Sheikholeslamian Mahsa, Kazemi Saber, Ghasemi Amir, Panahandeh Narges, Yazdizadeh Mina, Zanguei Elham
Dept. of Restorative Dentistry, Dental Research Center, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Dept. of Restorative Dentistry, Dental Research Center, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
J Dent (Shiraz). 2024 Dec 1;25(4):316-325. doi: 10.30476/dentjods.2023.97528.2015. eCollection 2024 Dec.
One of the most important factors in the clinical longevity of composite resin restorations is proper adhesion, which is achieved using phosphoric acid. Different phosphoric acid products might affect the micro-shear bond strength of composite resin to enamel.
The present study aimed to evaluate the micro-shear bond strength of composite resin to sound enamel using six different brands of acid-etch agents.
The present study was carried out on 72 extracted sound human (mandibular and maxillary) first premolar teeth. The teeth crowns were divided into two equal parts with a mesiodistal cut and randomly assigned to six groups in terms of the acid etchant brand: Ultra-etch, SDI, Morvabon, FGM, Nik Darman, and Experimental. The bonding procedure was carried out using the Margin Bond enamel adhesive. Tygon tubes (1×0.7 mm) containing composite resin were bonded to each enamel surface. After 24 hours of storage in distilled water, each sample underwent a shearing force with a crosshead speed of 0.5 mm/min. The morphologic changes were evaluated using scanning electron microscopy. The data were analyzed with SPSS using one-way ANOVA and Tukey test (< 0.05).
One-way ANOVA showed that micro-shear bond strength in different etchant agents have significant differences (< 0.001). The highest and lowest composite resin micro-shear bond strengths belonged to Ultradent and SDI brands, respectively. The enamel surfaces in the SDI group revealed residual debris after dissolution.
Preparation of the enamel surface with different phosphoric acid products might affect the micro-shear bond strength and enamel surface morphology differently. Further clinical studies are suggested to evaluate the effect of different types and concentrations of acid etching agents on the enamel and dentin bonds.
复合树脂修复体临床使用寿命的最重要因素之一是适当的粘结，这可通过使用磷酸来实现。不同的磷酸产品可能会影响复合树脂与牙釉质的微剪切粘结强度。
本研究旨在使用六种不同品牌的酸蚀剂评估复合树脂与健康牙釉质的微剪切粘结强度。
本研究使用72颗拔除的健康人（下颌和上颌）第一前磨牙进行。将牙冠沿近远中方向切成两个相等部分，并根据酸蚀剂品牌随机分为六组：Ultra-etch、SDI、Morvabon、FGM、Nik Darman和实验组。使用边缘粘结牙釉质粘合剂进行粘结程序。将装有复合树脂的泰根管（1×0.7毫米）粘结到每个牙釉质表面。在蒸馏水中储存24小时后，每个样品以0.5毫米/分钟的十字头速度承受剪切力。使用扫描电子显微镜评估形态变化。使用SPSS软件进行单因素方差分析和Tukey检验（<0.05）对数据进行分析。
单因素方差分析表明，不同蚀刻剂中的微剪切粘结强度存在显著差异（<0.001）。复合树脂微剪切粘结强度最高和最低的分别属于Ultradent和SDI品牌。SDI组的牙釉质表面在溶解后显示有残留碎屑。
用不同的磷酸产品制备牙釉质表面可能会对微剪切粘结强度和牙釉质表面形态产生不同影响。建议进一步开展临床研究，以评估不同类型和浓度的酸蚀剂对牙釉质和牙本质粘结的影响。
