Kimyai Soodabeh, Bahari Mahmoud, Abed-Kahnamouei Mahdi, Ebrahimi-Chaharom Mohammad-Esmaeel, Asl-Oskouei Mahdi-Hoseini
Professor, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Assistant Professor, Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
J Clin Exp Dent. 2023 Mar 1;15(3):e210-e216. doi: 10.4317/jced.60202. eCollection 2023 Mar.
Bond strength of indirect restorations is a very important issue that should be given special attention. Immediate dentin sealing (IDS) technique has been suggested in recent years. The aim of the present study was to investigate the effect of different strategies of universal adhesive application for immediate and delayed dentin sealing (DDS) on the microtensile bond strength (μTBS) of self-adhesive resin cement with and without aging.
In this experimental study, 24 healthy human third molars were selected. After exposing the occlusal dentin, the teeth were randomly divided into two groups of 12 based on the All-Bond Universal adhesive application strategy (etch-and-rinse or self-etch). Each group was further subdivided into two (n=6) based on IDS or DDS technique. Then composite blocks were cemented on the occlusal surface with self-adhesive resin cement. After cutting the samples into 1 mm2 cross-sections, half of the samples of each subgroup were subjected to µTBS test after one week, and the other half were tested under μTBS after 10,000 thermal cycles. Data were analyzed using three-way ANOVA (<0.05).
μTBS was significantly affected by all three factors of bond strategy, sealing technique and aging. There was also a significant interaction between the three factors.
Immediate dentin sealing improved μTBS. The etch-and-rinse strategy resulted in higher μTBS, while aging led to a decrease in μTBS. Adhesives, dental bonding, dentin, universal, sealing.
间接修复体的粘结强度是一个非常重要的问题，应予以特别关注。近年来，即时牙本质封闭（IDS）技术被提出。本研究的目的是调查通用粘结剂不同应用策略用于即时和延迟牙本质封闭（DDS）对自粘结树脂水门汀微拉伸粘结强度（μTBS）的影响，包括有无老化情况。
在本实验研究中，选取24颗健康人第三磨牙。暴露咬合面牙本质后，根据全粘结通用粘结剂的应用策略（酸蚀冲洗或自酸蚀）将牙齿随机分为两组，每组12颗。每组再根据IDS或DDS技术进一步细分为两组（n = 6）。然后用自粘结树脂水门汀将复合树脂块粘结在咬合面上。将样本切成1平方毫米的横截面后，每个亚组的一半样本在一周后进行μTBS测试，另一半在10000次热循环后进行μTBS测试。数据采用三因素方差分析进行分析（<0.05）。
μTBS受到粘结策略、封闭技术和老化这三个因素的显著影响。这三个因素之间也存在显著的交互作用。
即时牙本质封闭提高了μTBS。酸蚀冲洗策略导致更高的μTBS，而老化导致μTBS降低。粘结剂、牙粘结、牙本质、通用型、封闭。
