光固化可填充复合树脂的压缩蠕变与恢复

Compressive creep and recovery of light-cured packable composite resins.

作者信息

Marghalani Hanadi Yousif, Al-Jabab Abed Sulaiman

机构信息

Department of Restorative Dentistry, College of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 21589, Saudi Arabia.

出版信息

Dent Mater. 2004 Jul;20(6):600-10. doi: 10.1016/j.dental.2003.10.001.

DOI:10.1016/j.dental.2003.10.001

PMID:15134949

Abstract

OBJECTIVE

The purpose of this investigation was to study the time-dependent creep and recovery behavior of some packable composites resins compared to a typical dispersion-phase amalgam alloy.

METHODS

Three packable posterior composite resins (ALERT, SureFil, Solitaire) were used as experimental groups and a high copper admixed amalgam alloy (Dispersalloy) was chosen as a control material. Cylindrical specimens (4 mm x 8 mm) were fabricated and stored in artificial saliva for 1 week at 37 degrees C. A custom-made creep testing machine was used to test the compressive creep of each of the materials under specified conditions of stress and temperature (155.5 MPa and 37 degrees C, 155.5 MPa and 55 degrees C; 36 MPa and 37 degrees C; 36 MPa and 55 degrees C) for 24 h, after which the strain recovery was recorded over a period of 24 h.

RESULTS

One-way ANOVA and Fisher's test showed no significant differences in creep and recovery strain behaviors between ALERT and SureFil for each test condition (P > 0.05). However, for residual strain, there was a highly significant difference between Dispersalloy and each of the packable composites (P < 0.01), but no significant differences between the composites themselves (P > 0.05). ALERT and SureFil had the lowest creep strain (1.91 +/- 0.59% and 1.96 +/- 0.36%, respectively) while Solitaire showed 6.09 +/- 0.26% creep strain at 155.5 MPa and 37 degrees C.

SIGNIFICANCE

The low creep and residual strain values of ALERT and SureFil compared to Dispersalloy amalgam suggest that these packable composite resins are suitable for restoring stress-bearing areas because of their ability to withstand viscoelastic deformation better than amalgam, over extended time periods, even under high load and temperature.

摘要

目的

本研究旨在比较某些可压实复合树脂与典型的分散相汞合金的时间依赖性蠕变和恢复行为。

方法

使用三种可压实的后牙复合树脂（ALERT、SureFil、Solitaire）作为实验组，并选择一种高铜混合汞合金（Dispersalloy）作为对照材料。制作圆柱形试件（4毫米×8毫米）并在37摄氏度的人工唾液中储存1周。使用定制的蠕变试验机在特定的应力和温度条件下（155.5兆帕和37摄氏度、155.5兆帕和55摄氏度、36兆帕和37摄氏度、36兆帕和55摄氏度）测试每种材料的压缩蠕变24小时，之后记录24小时内的应变恢复情况。

结果

单向方差分析和费舍尔检验表明，在每种测试条件下，ALERT和SureFil之间的蠕变和恢复应变行为无显著差异（P>0.05）。然而，对于残余应变，Dispersalloy与每种可压实复合材料之间存在高度显著差异（P<0.01），但复合材料本身之间无显著差异（P>0.05）。在155.5兆帕和37摄氏度时，ALERT和SureFil的蠕变应变最低（分别为1.91±0.59%和1.96±0.36%），而Solitaire的蠕变应变显示为6.09±0.26%。