II类复合树脂修复中大块充填复合树脂与传统复合树脂的边缘封闭性：一项体外研究

Marginal Sealing of Bulk Fill versus Conventional Composites in Class II Composite Restorations: An In Vitro Study.

作者信息

Shadman Niloofar, Pezeshki Bahareh, Rostami Setare

机构信息

Department of Operative Dentistry, Faculty of Dentistry, Kerman University of Medical Sciences, Kerman, Iran.

Dentist, Private Practice, Isfahan, Iran.

出版信息

Front Dent. 2020 Dec 29;17:40. doi: 10.18502/fid.v17i40.5313. eCollection 2020.

DOI:10.18502/fid.v17i40.5313

PMID:36042801

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9375111/

Abstract

OBJECTIVES

Bulk fill composites are preferred to conventional composites with time-consuming incremental application technique, given that they have good mechanical properties and low microleakage. The aim of this study was to evaluate and compare the dentinal marginal microleakage of bulk fill (in two viscosities) and conventional composites in class II cavities in maxillary premolars.

MATERIALS AND METHODS

In this in vitro study, 42 class II cavities were prepared in the mesial and distal surfaces of 21 maxillary premolars extending 1 mm below the cementoenamel junction, and restored with Grandio composite with 2-mm increments, and X-tra fil and X-tra base with 4-mm increments. After 24 h of storage at 37C and 100% humidity, they were thermocycled (500 cycles, 5-55C), stored in basic fuchsine, sectioned, and evaluated under a stereomicroscope (×40). The microleakage scores of the gingival margin were recorded. Statistical analysis was done by SPSS 21 via the Kruskal-Wallis and Mann-Whitney U tests at P≤0.05 level of significance.

RESULTS

No statistically significant differences were noted among the groups in marginal microleakage (P=0.47). No statistically significant difference was noted between bulk and incremental application techniques in this respect either (P=0.23).

CONCLUSION

There was no difference in marginal microleakage between the bulk fill and conventional composites.

摘要

目的

由于大体积充填复合树脂具有良好的机械性能和低微渗漏率，相比于采用耗时的分层充填技术的传统复合树脂，大体积充填复合树脂更受青睐。本研究的目的是评估和比较上颌前磨牙Ⅱ类洞中大体积充填复合树脂（两种黏度）和传统复合树脂的牙本质边缘微渗漏情况。

材料与方法

在这项体外研究中，在21颗上颌前磨牙的近中面和远中面制备42个Ⅱ类洞，洞深至牙骨质釉质界下方1mm，分别用Grandio复合树脂以2mm的增量、X-tra fil和X-tra base以4mm的增量进行充填修复。在37℃、湿度100%的条件下储存24小时后，进行热循环（500次循环，5 - 55℃），然后储存在碱性品红中，切片，并在体视显微镜（×40）下进行评估。记录牙龈边缘的微渗漏评分。使用SPSS 21软件通过Kruskal-Wallis检验和Mann-Whitney U检验进行统计学分析，显著性水平为P≤0.05。