后固化对复合材料力学性能的影响。

Effects of post-curing on mechanical properties of a composite.

作者信息

Powers J M, Smith L T, Eldiwany M, Ladd G D

机构信息

Department of Oral Biomaterials, University of Texas-Houston Health Science Center, Dental Branch 77225.

出版信息

Am J Dent. 1993 Oct;6(5):232-4.

PMID:7880465

Abstract

The mechanical properties (diametral tensile strength, compressive strength, modulus of elasticity in compression, Knoop hardness, and Rockwell Superficial indentation and recovery) were measured for one light-cured composite (Herculite XRV) post-cured by five different conditions. The post-curing conditions were: boiling water, CRC-100, D.I.-500, Translux EC Light Box, and Triad 2000 with normal light curing as a control. Post-curing Herculite XRV significantly improved the diametral tensile strength (24-39%), Knoop hardness (8-22%) and Rockwell Superficial recovery (3-6%); decreased Rockwell Superficial indentation (0-19%) but did not affect the compressive strength significantly. Modulus of elasticity was not affected, except by the Translux EC Light Box, which increased the modulus by 33%. Post-curing Herculite XRV with the Triad 2000 and Translux EC Light Box produced the most improved properties. Water at 100 degrees C was the least effective of the post-curing methods.

摘要

对一种光固化复合树脂（Herculite XRV）在五种不同条件下进行后固化处理后，测量其机械性能（径向拉伸强度、抗压强度、压缩弹性模量、努氏硬度、洛氏表面压痕和恢复率）。后固化条件分别为：沸水、CRC - 100、D.I. - 500、Translux EC灯箱以及以常规光固化作为对照的Triad 2000。对Herculite XRV进行后固化处理显著提高了径向拉伸强度（提高24% - 39%）、努氏硬度（提高8% - 22%）和洛氏表面恢复率（提高3% - 6%）；降低了洛氏表面压痕（降低0% - 19%），但对抗压强度没有显著影响。除了Translux EC灯箱使弹性模量提高33%外，弹性模量不受影响。使用Triad 2000和Translux EC灯箱对Herculite XRV进行后固化处理，性能改善最为明显。100摄氏度的水是后固化方法中效果最差的。