疲劳循环对复合树脂微渗漏影响的体外研究

doi:10.13701/j.cnki.kqyxyj.2017.06.022

口腔医学研究 ›› 2017, Vol. 33 ›› Issue (6): 668-670.DOI: 10.13701/j.cnki.kqyxyj.2017.06.022

疲劳循环对复合树脂微渗漏影响的体外研究

魏玉华, 杨苗^*

湖北文理学院附属医院襄阳市中心医院口腔科湖北襄阳 441021

收稿日期:2017-03-09 出版日期:2017-06-20 发布日期:2017-06-26
通讯作者: 杨苗,E-mail:yangmiao0728@126.com
作者简介:魏玉华(1968~ ),女,湖北枣阳人,主要从事口腔内科的临床治疗工作。

Microleakage of Resin-restoration after Chewing for Half a Year in Vitro.

WEI Yu-hua, YANG Miao^*.

Department of Stomatology, the Affiliated Hospital of Hubei University of Arts and Science, Xiangyang Central Hospital, Xiangyang 441021, China.

Received:2017-03-09 Online:2017-06-20 Published:2017-06-26

摘要/Abstract

摘要： 目的:通过体外加载实验观察复合树脂边缘微渗漏变化情况,分析洞缘斜面的必要性。方法:将140颗离体牙按是否制备洞缘斜面、不同疲劳循环加载次数及位点随机分为14小组。所有样本采用复合树脂(3M P60)充填,包埋后经不同疲劳循环次数(0、1×10⁵、1.3×10⁶次)或加载位点(颊尖、颊界面、修复体)进行加载试验,检测修复体界面染料渗透深度。结果:1.3×10⁶次组微渗漏大于1×10⁵次及0次组。0次加载时,不同洞缘组间差异不显著;加载1×10⁵次后,牙体受力时洞缘斜面组的微渗漏比无洞缘斜面组小(P<0.05);加载1.3×10⁶次后,洞缘斜面组微渗漏小于无洞缘斜面组(P<0.05)。结论:体外疲劳循环(模拟咀嚼半年)后,洞缘斜面有利于减少复合树脂的微渗漏。

关键词: 循环加载, 微渗漏, 洞缘斜面, 复合树脂

Abstract: Objective: To measure the microleakage of resin-restoration after chewing for half a year, and analyze the necessity of beveled margin using cyclic mechanical loading experiment. Methods: One hundred and forty fresh dissociated teeth were divided into 14 groups according to different cavity margin designs, different numbers of loading cycles (0 or 1×10⁵ times loading or 1.3×10⁶ times loading cycles), and different loading sites (the buccal cusp or the buccal interface or the restoration ). After all the cavities were filled with combined resins (3M FiltekTM P60) and entrapped, each sample received cyclic mechanical loading. Then all pieces were examined to observe the dye penetrated along the tooth-restoration interface. SPSS17.0 software was used for statistical analysis. Results: The microleakage of 1.3×10⁶ times loading group was larger than that of the 0 and 1×10⁵ times loading group. There was no significant difference among groups with beveled margin or not after 0 cyclic loading (P>0.05. After 1.3×10⁶ times loading, the microleakage of tooth loaded with beveled margin was less than that without beveled margin(P<0.05). Conclusion: After chewing for half a year, the beveled margin could reduce the microleakage of resin-restoration.

Key words: Cyclic mechanical loading , Microleakage, Beveled margin, Resin

中图分类号:

R780.1

魏玉华, 杨苗. 疲劳循环对复合树脂微渗漏影响的体外研究[J]. 口腔医学研究, 2017, 33(6): 668-670.

WEI Yu-hua, YANG Miao.. Microleakage of Resin-restoration after Chewing for Half a Year in Vitro.[J]. Journal of Oral Science Research, 2017, 33(6): 668-670.

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疲劳循环对复合树脂微渗漏影响的体外研究

Microleakage of Resin-restoration after Chewing for Half a Year in Vitro.

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