自粘接树脂水门汀在模拟根管内的硬度变化

doi:10.3969/j.issn.1000-1182.2012.03.005

华西口腔医学杂志

自粘接树脂水门汀在模拟根管内的硬度变化

丁虹1 兰卫东2 孟翔峰1

1.南京大学口腔医学院·南京市口腔医院修复科； 2.口腔内科，南京210008

收稿日期:2012-06-25 修回日期:2012-06-25 出版日期:2012-06-01 发布日期:2012-06-01
通讯作者: 孟翔峰，Tel：025-83620297
作者简介:丁虹（1980—），女，江苏人，住院医师，硕士
基金资助:
南京市医学科技发展基金资助项目（ZKX09035）；南京市科技发展基金资助项目（201001083）

Hardness development of self-adhesive resin cement in simulated root canal

Ding Hong1, Lan Weidong2, Meng Xiangfeng1

1. Dept. of Prosthodontics, School of Stomatology, Nanjing University & Nanjing Stomatological Hospital, Nanjing 210008, China; 2. Dept. of Oral Medicine, School of Stomatology, Nanjing University & Nanjing Stomatological Hospital, Nanjing 210008, China

Received:2012-06-25 Revised:2012-06-25 Online:2012-06-01 Published:2012-06-01
Contact: Meng Xiangfeng，Tel：025-83620297
About author:Ding Hong（1980—），女，江苏人，住院医师，硕士

摘要/Abstract

摘要：

目的比较自粘接与通用型树脂水门汀在模拟根管内固化开始后的硬度变化。方法将双重固化自粘接树脂水门汀A（RelyX Unicem）、B（BisCem）和双重固化通用型树脂水门汀C（DUOLINK）注满单端开口、以盖板封闭的半圆柱形不锈钢槽，将光固化灯紧贴开口端持续照射20 s，试件避光保存0.5 h后打开封闭盖板，测量树脂纵断面距照射光源1～10 mm间，以1 mm为间隔共10个深度的努氏显微硬度。试件继续避光保存24、120 h后，重复上述测量。对测量数据进行统计学分析。结果3种材料的硬度值随模拟根管深度的增加而降低（P<0.001），其中A组在5 mm及以下各深度的硬度值、B和C组在4 mm及以下各深度的硬度值差异无统计学意义。各组的硬度值在固化开始后0.5 h内增长最多，24 h后硬度值达到或接近最大值。光照后120 h，除1 mm深处外，C组在各深度的硬度值均显著高于A和B组（P<0.001）。结论2种类型树脂水门汀双重固化条件下的硬度值差异有统计学意义，但随时间变化的趋势基本一致。

关键词: 自粘接树脂水门汀, 双重固化, 显微硬度, 根管

Abstract:

Objective To compare the hardness development of dual-cured self-adhesive and universal resin cement in simulated root canal. Methods The light-proof half-cylinder steel slot with one end open were syringed and filled respectively by self-adhesive A（RelyX Unicem）, B（BisCem） and universal C（DUOLINK） resin cements, then the open end of slot was irradiated directly by a light unit for 20 s. Specimens were stored in a light-proof box for 0.5 h, Knoop microhardness was measured along the vertical surfaces of specimens from 1 mm to 10 mm depth at 1 mm intervals. The same measurements were taken at 24 h and 120 h after irradiation. Data were analyzed by One-way ANOVA. Results Hardness of each group decreased with the increase of simulated canal depth（P<0.001）, however hardness showed no significant change between 5 mm and more depth of group A, between 4 mm and more depth of group B and C. The increase of hardness for each group was more rapid within 0.5 h after irradiation, thereafter the hardness increased gradually to maximum at 24 h. At 120 h after irradiation, hardness of group C was greater than that of other two groups at more than 1 mm depth（P<0.001）. Conclusion Under dual-cured condition, hardness has significant difference between self-adhesive and universal resin cements, however their hardness development is similar.

Key words: self-adhesive resin cement, dual-cured, microhardness, root canal

丁虹兰卫东孟翔峰. 自粘接树脂水门汀在模拟根管内的硬度变化[J]. 华西口腔医学杂志, doi: 10.3969/j.issn.1000-1182.2012.03.005.

Ding Hong1, Lan Weidong2, Meng Xiangfeng1. Hardness development of self-adhesive resin cement in simulated root canal[J]. West China Journal of Stomatology, doi: 10.3969/j.issn.1000-1182.2012.03.005.

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自粘接树脂水门汀在模拟根管内的硬度变化

Hardness development of self-adhesive resin cement in simulated root canal

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