Curing effectiveness of single-peak and multi-peak led light curing units on tpo-containing resin composites with different chromatic characteristics.

ORAL and Implantology Pub Date : 2017-09-27 eCollection Date: 2017-04-01 DOI:10.11138/orl/2017.10.2.140

G Conte, M Panetta, M Mancini, A Fabianelli, A Brotzu, R Sorge, L Cianconi

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引用次数: 9

Abstract

This study evaluated the surface microhardness of Lucirin-TPO (TPO) containing resin based composite (RBC) cured with three light-emitting diode (LED) light curing units (LCUs) (two single-peak LED and one multi-peak LED), and two different energy density (ED) (8 J/cm² and 16 J/cm²). Ninety specimens (8 mm wide and 2 mm thick) (n=5), were prepared with three different shades: translucent (T), A2 dentin (A2d), and A4 dentin (A4d). Specimens were subjected to micro-hardness Vickers measurements (Vickers Hardness Number, VHN) on both top and bottom surfaces. Hardness ratio (rHV) was also calculated. Data were analyzed using multifactorial ANOVA and Bonferroni tests (<=0.05). Results indicated that higher ED performed better than lower ED. Multi-peak LED achieved higher VHNs and rHV than single-peak LED when curing a TPO-containing RBC. A4d invariably achieved lower rHV and VHN than T and A2d. Single-peak LED achieved comparable VHNs and rHVs with multi-peak LED only curing A2d and T shades with 16J/cm².

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单峰和多峰led光固化单元对不同色度特性的含tpo树脂复合材料的固化效果。

采用三个发光二极管(LED)光固化单元(lcu)(两个单峰LED和一个多峰LED)、两种不同能量密度(ED) (8 J/cm2和16 J/cm2)对含Lucirin-TPO (TPO)树脂基复合材料(RBC)进行表面显微硬度评价。90个样品(宽8 mm，厚2 mm) (n=5)，有三种不同的颜色:半透明(T)， A2牙本质(A2d)和A4牙本质(A4d)。在试样的上下表面进行显微硬度维氏测量(维氏硬度数，VHN)。计算硬度比(rHV)。数据分析采用多因素方差分析和Bonferroni检验(2。

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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ORAL and Implantology Dentistry-Dentistry (all)

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