Repair Bond Strength of Aged Bulk-Fill Composites: Influence of Different Primers and Direction of Debonding Stress.

IF 1.2 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

European Journal of Prosthodontics and Restorative Dentistry Pub Date : 2025-08-12 DOI:10.1922/EJPRD_2937Ahlholm07

P Ahlholm, F Staxrud, K Sipilä, P Vallittu

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引用次数: 0

Abstract

Objective: This study aimed to assess the hydrolytic stability of the adhesive interface between repaired bulk-fill and bulk-fill resin composites after 12 months of water storage.

Materials and methods: Bulk-fill resin composite specimens were bonded to smooth substrate surfaces using three different primer/bonding systems. A total of 35 specimens were prepared for shear bond strength (SBS) testing, and 30 specimens for micro-tensile bond strength (μTBS) testing. The specimens were aged in water at 37°C for 12 months, after which SBS and μTBS were evaluated.

Results: The mean SBS ranged from 6.0 to 14.9 MPa, with the highest values observed for the Ceramic primer. The mean μTBS ranged from 0 to 7.8 MPa, with the Composite primer yielding the highest values. Both primers outperformed the three-step etch-and-rinse adhesive in terms of bond strength.

Conclusions: The Ceramic primer (containing silane) and the Composite primer exhibited superior adhesive performance compared to the three-step etch-and-rinse adhesive, demonstrating better long-term bond stability.

Clinical relevance: The findings suggest that using Ceramic or Composite primers can enhance the durability of repaired bulk-fill composite restorations, improving adhesive stability and long-term clinical outcomes.

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老化堆填复合材料修复粘结强度：不同底漆及脱粘应力方向的影响

目的：研究修复后的填充体与填充体树脂复合材料在蓄水12个月后粘接界面的水解稳定性。材料和方法：用三种不同的底漆/粘接系统将填充树脂复合试样粘接到光滑的基材表面。共制备35个试件进行剪切粘结强度（SBS）试验，30个试件进行微拉伸粘结强度（μTBS）试验。37℃水中陈化12个月，测定SBS和μTBS。结果：平均SBS为6.0 ~ 14.9 MPa，以陶瓷引物最高。平均μTBS范围为0 ~ 7.8 MPa，以复合引物最高。两种底漆在粘合强度方面都优于三步蚀刻-冲洗胶粘剂。结论：陶瓷底物（含硅烷）和复合底物的粘接性能优于三步蚀刻-漂洗底物，具有较好的长期粘接稳定性。临床意义：研究结果表明，使用陶瓷或复合底物可以提高修复体填充复合修复体的耐久性，提高粘连稳定性和长期临床效果。

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

European Journal of Prosthodontics and Restorative Dentistry DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

2.30

自引率

7.70%

发文量

期刊介绍： The European Journal of Prosthodontics and Restorative Dentistry is published quarterly and includes clinical and research articles in subjects such as prosthodontics, operative dentistry, implantology, endodontics, periodontics and dental materials.