Influence of viscosity and fiber reinforcement of resin composite on fracture strength and failure mode of restored molars

IF 3.2 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Esthetic and Restorative Dentistry Pub Date : 2024-08-02 DOI:10.1111/jerd.13293

Karin Tyeme Borges DDS, MSc, María Paz Méndez Servín DDS, MSc, Fabiana Mantovani Gomes França DDS, MS, PhD, Cecilia Pedroso Turssi DDS, MSc, PhD, Roberta Tarkany Basting DDS, MSc, PhD, Ronaldo Hirata DDS, MSc, PhD, Waldemir Francisco Vieira-Junior DDS, MSc, PhD

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引用次数: 0

Abstract

Objective

To evaluate the fracture behavior of human molars with extensive MOD restorations using short-fiber-reinforced resin composite of varying viscosities.

Materials and Methods

Human molars were randomly divided into seven groups (n = 12): intact teeth (control); restoration using conventional high-viscosity resin composite without (Filtek Z350XT, 3M) or with fibers (everX Posterior, GC); conventional low-viscosity resin composite without (Filtek Supreme Flowable, 3M) or with fibers (everX Flow Dentin Shade, GC); bulk-fill low-viscosity resin composite (Filtek Bulk Fill Flow, 3M) or with fibers (everX Flow Bulk Shade, GC). Restorations were performed on extensive MOD preparations, following the manufacturers' recommendations for each material. Specimens underwent fracture strength testing (N) and fracture pattern (%) categorized as repairable, possibly repairable, or non-repairable. Results were analyzed using a generalized linear model (N) and Fisher's exact test (%), with α = 0.05.

Results

Restorations performed with high-viscosity materials showed fracture strength values similar to the control and higher than those of restorations using low-viscosity resin composites (p < 0.0001), except for the bulk-fill low-viscosity resin composite with fibers (p > 0.05). Teeth restored using low-viscosity resin composite with fibers showed a higher % of repairable and possibly repairable fractures than the control (p = 0.0091).

Conclusions

The viscosity of materials mediated the fracture strength, with restorations using high-viscosity resin composites promoting values similar to the intact tooth; however, the presence of fibers influenced the fracture pattern.

Clinical Significance

Teeth with MOD cavities restored with high-viscosity resin composites showed similar fracture strength to intact teeth. Fiber-reinforced low-viscosity resin composite for the base of restoration resulted in a more repairable/possibly repairable fracture pattern.

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树脂复合材料的粘度和纤维增强对修复臼齿断裂强度和破坏模式的影响

目的评估使用不同粘度的短纤维增强树脂复合材料进行大面积 MOD 修复体的人类臼齿的断裂行为。材料和方法：将人类臼齿随机分为七组（n = 12）：完好无损的牙齿（对照组）；使用不含纤维（Filtek Z350XT，3M）或含纤维（everX Posterior，GC）的传统高粘度树脂复合材料进行修复；使用不含纤维（Filtek Supreme Flowable，3M）或含纤维（everX Flow Dentin Shade，GC）的传统低粘度树脂复合材料进行修复；使用大量填充低粘度树脂复合材料（Filtek Bulill Flow，3M）或含纤维（everX Flow Bulk Shade，GC）进行修复。按照制造商对每种材料的建议，在大量 MOD 制剂上进行修复。对试样进行断裂强度测试（N）和断裂模式（%），分为可修复、可能修复和不可修复。结果采用广义线性模型（N）和费雪精确检验（%）进行分析，α = 0.05：结果：使用高粘度材料修复的牙齿，其断裂强度值与对照组相似，但高于使用低粘度树脂复合材料修复的牙齿（P 0.05）。使用带纤维的低粘度树脂复合材料修复的牙齿显示出的可修复和可能修复的断裂百分比高于对照组（p = 0.0091）：材料的粘度对断裂强度有影响，使用高粘度树脂复合材料修复的牙齿的断裂强度值与完整牙齿的断裂强度值相似；然而，纤维的存在会影响断裂模式：临床意义：用高粘度树脂复合材料修复的MOD龋齿与完整牙齿的断裂强度相似。用纤维增强的低粘度树脂复合材料作为修复体的基底，可修复/可能修复的断裂模式更多。

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 Esthetic and Restorative Dentistry 医学-牙科与口腔外科

CiteScore

6.30

自引率

6.20%

发文量

124

审稿时长

>12 weeks

期刊介绍： The Journal of Esthetic and Restorative Dentistry (JERD) is the longest standing peer-reviewed journal devoted solely to advancing the knowledge and practice of esthetic dentistry. Its goal is to provide the very latest evidence-based information in the realm of contemporary interdisciplinary esthetic dentistry through high quality clinical papers, sound research reports and educational features. The range of topics covered in the journal includes: - Interdisciplinary esthetic concepts - Implants - Conservative adhesive restorations - Tooth Whitening - Prosthodontic materials and techniques - Dental materials - Orthodontic, periodontal and endodontic esthetics - Esthetics related research - Innovations in esthetics