不同有机相复合材料在深 II 类窝洞中的显微硬度：一项体外研究。

Microhardness of composite materials with different organic phases in deep class II cavities: an in vitro study.

机构信息

Department of Operative Dentistry and Peridontology, Dental School and Hospital Freiburg, Freiburg, Germany.

出版信息

Oper Dent. 2011 Sep-Oct;36(5):502-11. doi: 10.2341/10-325-L. Epub 2011 Aug 15.

DOI:10.2341/10-325-L

PMID:21843028

Abstract

OBJECTIVE

This study compared the microhardness of three composite resins with different organic matrices in deep class II cavities.

MATERIALS AND METHOD

A total of 36 extracted molars were randomly assigned to six groups and standardized class II cavities were prepared. The cavity design comprised three steps in a mesiodistal direction with an increasing depth (2, 4, and 6 mm). Twelve cavities each were restored using Filtek Supreme (FS), Quixfil (QF), and Filtek Silorane (SI). The materials were applied in incremental layers of 2 mm and cured either with Halogen Translux Energy (HTE) (n=18) or LED Bluephase C8 (LED) (n=18). Subsequently, the specimens were cross-sectioned, and microhardness was determined in various depths and at two different distances from the matrix.

RESULTS

QF yielded the highest KHN microhardness values (92.67 ± 12.77), followed by FS (65.53 ± 19.52) and SI (57.67 ± 8.33). Composites cured with LED achieved higher KHN values. All materials showed the highest microhardness values within the superficial increments and at a distance of 1000 μm from the matrix.

摘要

目的

本研究比较了三种具有不同有机基质的复合树脂在深 II 类窝洞中的显微硬度。

材料和方法

从 36 颗离体磨牙中随机抽取 36 颗，分为 6 组，并制备标准化的 II 类窝洞。窝洞设计在近远中方向分为三个步骤，深度逐渐增加（2、4 和 6mm）。每个窝洞用 Filtek Supreme（FS）、Quixfil（QF）和 Filtek Silorane（SI）各 12 个。将材料以 2mm 的增量分层涂抹，并分别用卤素 Translux Energy（HTE）（n=18）或 LED Bluephase C8（LED）（n=18）固化。然后，将标本进行横断，在不同深度和距离基质两个不同位置测量显微硬度。