不同固化强度下聚合的大块充填复合树脂修复材料的耐磨性

Wear Resistance of Bulk-fill Composite Resin Restorative Materials Polymerized under different Curing Intensities.

作者信息

Alkhudhairy Fahad

机构信息

Department of Restorative Dental Sciences, College of Dentistry King Saud University, Riyadh, Kingdom of Saudi Arabia, e-mail:

出版信息

J Contemp Dent Pract. 2017 Jan 1;18(1):39-43. doi: 10.5005/jp-journals-10024-1985.

DOI:10.5005/jp-journals-10024-1985

PMID:28050983

Abstract

INTRODUCTION

The aim of this study was to assess the wear resistance of four bulk-fill composite resin restorative materials cured using high- and low-intensity lights.

MATERIALS AND METHODS

Twenty-four samples were prepared from each composite resin material (Tetric N-Ceram, SonicFill, Smart Dentin Replacement, Filtek Bulk-Fill) resulting in a total of 96 samples; they were placed into a mold in a single increment. All of the 96 samples were cured using the Bluephase N light curing unit for 20 seconds. Half of the total specimens (n = 48) were light cured using high-intensity output (1,200 mW/cm), while the remaining half (n = 48) were light cured using low-intensity output (650 mW/cm). Wear was analyzed by a three-dimensional (3D) noncontact optical profilometer (Contour GT-I, Bruker, Germany). Mean and standard deviation (SD) of surface loss (depth) after 120,000 cycles for each test material was calculated and analyzed using one-way analysis of variance (ANOVA) with a significance level at p < 0.05.

RESULTS

The least mean surface loss was observed for SonicFill (186.52 urn) cured using low-intensity light. No significant difference in the mean surface loss was observed when comparing the four tested materials with each other without taking the curing light intensity into consideration (p = 0.352). A significant difference in the mean surface loss was observed between SonicFill cured using high-intensity light compared with that cured using low-intensity light (p < 0.001).

CONCLUSION

A higher curing light intensity (1,200 mW/cm) had no positive influence on the wear resistance of the four bulk-fill composite resin restorative materials tested compared with lower curing light intensity (650 mW/cm). Furthermore, SonicFill cured using low-intensity light was the most wear-resistant material tested, whereas Tetric N-Ceram cured using high-intensity light was the least wear resistant.

CLINICAL SIGNIFICANCE

The wear resistance was better with the newly introduced bulk-fill composite resins under low-intensity light curing.

摘要

引言

本研究的目的是评估使用高强度和低强度光固化的四种大块充填复合树脂修复材料的耐磨性。

材料与方法

从每种复合树脂材料（Tetric N-Ceram、SonicFill、Smart Dentin Replacement、Filtek Bulk-Fill）制备24个样本，共96个样本；将它们一次性放入模具中。所有96个样本均使用Bluephase N光固化机固化20秒。总样本的一半（n = 48）使用高强度输出（1200 mW/cm）进行光固化，其余一半（n = 48）使用低强度输出（650 mW/cm）进行光固化。通过三维（3D）非接触式光学轮廓仪（Contour GT-I，德国布鲁克公司）分析磨损情况。计算每种测试材料在120,000次循环后表面损失（深度）的平均值和标准差（SD），并使用单因素方差分析（ANOVA）进行分析，显著性水平为p < 0.05。

结果

使用低强度光固化的SonicFill观察到的平均表面损失最小（186.52 µm）。在不考虑固化光强度的情况下，比较四种测试材料时，平均表面损失没有显著差异（p = 0.352）。与使用低强度光固化的SonicFill相比，使用高强度光固化的SonicFill在平均表面损失上存在显著差异（p < 0.001）。