Can a New HEMA-free Two-step Self-etch Adhesive Improve Dentin Bonding Durability and Marginal Adaptation?

IF 2.5 3区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE Journal of Adhesive Dentistry Pub Date : 2021-12-03 DOI:10.3290/j.jad.b2288233

Antonin Tichy, Keiichi Hosaka, Yi Yang, Yutaro Motoyama, Yasunori Sumi, Masatoshi Nakajima, Junji Tagami

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引用次数: 6

Abstract

Purpose: A new two-step self-etch adhesive (2-SEA) free of hydrophilic monomers was evaluated. Its microtensile bond strength (µTBS) to dentin under various aging conditions, interfacial gap formation, water sorption/solubility, and formation of an acid-base resistant zone (ABRZ) were evaluated and compared with a gold-standard 2-SEA.

Materials and methods: The new 2-SEA G2-Bond Universal (G2; GC) was compared to Clearfil SE Bond 2 (CSE2, Kuraray Noritake). Their µTBS to sound coronal dentin was tested after 1 week, 10,000 thermal cycles (TC), 20,000 TC, 6 months and 1 year. Failure mode was determined using scanning electron microscopy (SEM). Gap formation at the interface of 2-mm deep tapered cavities with an enamel border was observed using swept-source optical coherence tomography after 1 day, 1 week, 10,000 TC, and 20,000 TC. In addition, water sorption and solubility of the bonding agents was measured, and ABRZ formation was evaluated using SEM.

Results: There was no significant difference in µTBS between G2 and CSE2 (p > 0.05), and the aging conditions had no significant effect on µTBS (p > 0.05). In all groups, cohesive failures prevailed (55%-95%). Interfacial gap formation was initially similar for both adhesives (p > 0.05), but G2 exhibited a significantly lower gap formation than CSE2 after TC (p < 0.05). The water sorption of G2 was significantly lower compared to CSE2 (p < 0.05), and their solubility was statistically similar (p > 0.05). ABRZ of similar thickness was observed with both adhesives.

Conclusion: The new 2-SEA exhibited stable dentin bonding and increased hydrophobicity resulting from the absence of hydrophilic monomers.

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新型不含hema的两步自蚀刻胶能否提高牙本质粘接耐久性和边缘适应性?

目的:研究一种不含亲水性单体的两步自蚀刻胶粘剂(2-SEA)。在各种老化条件下，对其与牙本质的微拉伸结合强度(µTBS)、界面间隙形成、吸水性/溶解度和耐酸碱区(ABRZ)的形成进行了评估，并与金标准2-SEA进行了比较。材料与方法:新型2-SEA G2- bond Universal (G2;GC)与Clearfil SE Bond 2 (CSE2, Kuraray Noritake)进行比较。分别在1周、1万次热循环(TC)、2万次热循环(TC)、6个月和1年后测试他们对健全冠状牙本质的µTBS。用扫描电子显微镜(SEM)确定了失效模式。在1天，1周，10,000 TC和20,000 TC后，使用扫描源光学相干断层扫描观察2 mm深锥形牙釉质边界界面的间隙形成。此外，还测量了粘结剂的吸水性和溶解度，并利用扫描电镜对ABRZ的形成进行了评价。结果:G2与CSE2之间µTBS差异无统计学意义(p > 0.05)，衰老条件对µTBS无显著影响(p > 0.05)。在所有组中，内聚失败普遍存在(55%-95%)。两种粘接剂的界面间隙形成初始相似(p > 0.05)，但G2在TC后的间隙形成明显低于CSE2 (p < 0.05)。与CSE2相比，G2的吸水率显著降低(p < 0.05)，溶解度差异有统计学意义(p > 0.05)。两种胶粘剂的ABRZ厚度相近。结论:新的2-SEA具有稳定的牙本质键合，并且由于缺乏亲水性单体而增加了疏水性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Adhesive Dentistry 医学-牙科与口腔外科

CiteScore

5.20

自引率

6.10%

发文量

审稿时长

6-12 weeks

期刊介绍： New materials and applications for adhesion are profoundly changing the way dentistry is delivered. Bonding techniques, which have long been restricted to the tooth hard tissues, enamel, and dentin, have obvious applications in operative and preventive dentistry, as well as in esthetic and pediatric dentistry, prosthodontics, and orthodontics. The current development of adhesive techniques for soft tissues and slow-releasing agents will expand applications to include periodontics and oral surgery. Scientifically sound, peer-reviewed articles explore the latest innovations in these emerging fields.