A comparison of the effects of incremental and snowplow techniques on the mechanical properties of composite restorations

IF 1.9 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

Australian dental journal Pub Date : 2023-10-09 DOI:10.1111/adj.12982

Y Ölçer Us, A Aydınoğlu, Ş Erşahan, Y Erdem Hepşenoğlu, K Sağır, A Üşümez

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引用次数: 0

Abstract

Background

Glass fibre-reinforced composite (GFRC) has the potential to enhance the mechanical properties of resin-based restorations. Nevertheless, the application technique can influence the cervical margin porosity, potentially reducing the mechanical strength of restorations.

Methods

In an in vitro setup, mould specimens underwent six different treatments to assess the effects of snowplow and incremental curing techniques on the properties of GFRC (EverX) and universal resin composite (Filtek). Mechanical properties, namely flexural strength (FS), compressive strength (CS) and Vickers hardness (VH), were evaluated following ISO 4049 standards. Data interpretation utilized the Kruskal–Wallis tests.

Results

No significant difference emerged across groups for FS. CS in the snowplow method with lesser EverX thickness (SnPl_1) was comparable with only EverX and Filtek (P > 0.05). The CS was reduced in the snowplow technique with greater EverX thickness (SnPl_2) (P < 0.05) and further decreased with the incremental method (P < 0.001). VH results showed that EverX Posterior was consistently softer than Filtek, with specific patterns of hardness variations among different application methods.

Conclusions

Applying EverX and Filtek using the snowplow technique delivers superior CS and VH for restorations in contrast to the incremental method. Utilizing the snowplow approach in high-stress areas can make restorations more fracture-resistant.

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增量和铲雪技术对复合修复体力学性能影响的比较。

背景：玻璃纤维增强复合材料（GFRC）具有提高树脂基修复体力学性能的潜力。然而，应用技术可能会影响颈缘孔隙率，从而可能降低修复体的机械强度。方法：在体外装置中，对模具样品进行六种不同的处理，以评估扫雪机和增量固化技术对GFRC（EverX）和通用树脂复合材料（Filtek）性能的影响。机械性能，即弯曲强度（FS）、压缩强度（CS）和维氏硬度（VH），按照ISO 4049标准进行评估。数据解释采用Kruskal-Wallis检验。结果：FS各组间无显著差异。在具有较小EverX厚度（SnPl_1）的扫雪机方法中，CS仅与EverX和Filtek相当（P > 0.05）。EverX厚度越大（SnPl_2），CS越低（P 结论：与增量方法相比，使用雪犁技术应用EverX和Filtek可提供更好的CS和VH修复。在高应力区域使用扫雪机方法可以使修复体更具抗断裂性。

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

Australian dental journal 医学-牙科与口腔外科

CiteScore

4.20

自引率

4.80%

发文量

审稿时长

6-12 weeks

期刊介绍： The Australian Dental Journal provides a forum for the exchange of information about new and significant research in dentistry, promoting the discipline of dentistry in Australia and throughout the world. It comprises peer-reviewed research articles as its core material, supplemented by reviews, theoretical articles, special features and commentaries.