Micro CT评估光照模式对复合树脂微渗漏影响的研究

doi:10.13701/j.cnki.kqyxyj.2020.03.021

口腔医学研究 ›› 2020, Vol. 36 ›› Issue (3): 276-279.DOI: 10.13701/j.cnki.kqyxyj.2020.03.021

Micro CT评估光照模式对复合树脂微渗漏影响的研究

赵岩¹, 靳趁心^2*

1. 天津医科大学口腔医院儿童口腔科天津 300070;
2. 天津医科大学口腔医院牙周科天津 300070

收稿日期:2019-05-05 出版日期:2020-05-15 发布日期:2020-05-15
通讯作者: 靳趁心,E-mail:chenxinjin0602@sina.com
作者简介:赵岩(1970~),男,天津人,硕士,主治医师,主要从事儿童口腔学、口腔材料学研究。

Micro CT Evaluation of Microleakage in Composites Resin Cured by Various Light Curing Modes

ZHAO Yan¹, JIN Chenxin^2*

1. Department of Pediatric Dentistry, Stomatological Hospital of Tianjin Medical University, Tianjin 300070, China;
2. Department of Periodontology, Stomatological Hospital of Tianjin Medical University, Tianjin 300070, China

Received:2019-05-05 Online:2020-05-15 Published:2020-05-15

摘要/Abstract

摘要： 目的：用Micro CT评价不同光照模式对复合树脂充填体微渗漏的影响。方法：选取24颗新鲜拔除的上颌前磨牙,在牙冠颊面制备圆形窝洞(直径1 mm,深度1 mm),窝洞用光固化树脂(3M Z250)充填并固化,按照光固化模式随机分为常规模式组(A组)、弱光引导组(B组)、间歇光照组(C组)。标本经冷热循环及氨硝酸银染色剂浸染后,用Micro CT测量复合树脂充填体和牙齿界面的银沉积物体积,定量评价微渗漏程度。结果：常规模式组微渗漏大于弱光启动组和间歇光照组,差异有显著性(P<0.05);弱光启动组与间歇光照组之间微渗漏有差异,但不具统计学意义(P>0.05)。结论：弱光引导模式和间歇光照模式能够比常规光照模式更有效降低复合树脂(3M Z250)的微渗漏。

关键词: 复合树脂, 微渗漏, 光照模式, MicroCT, 三维重建

Abstract: Objective: To evaluate the effects of different light modes on microleakage of composite resin filling by Micro CT. Methods: Twenty-four freshly extracted maxillary premolars were collected. Circular cavity(diameter 1mm, depth 1mm) were prepared on the buccal surface of the crown. The cavity was filled with composite resin (3M Z250) and cured by light curing. According to the light curing mode, they were randomly divided into three groups: conventional model group (group A), soft-start light group (group B), and intermittent light group (group C). After thermal cycling and 50% ammoniacal silver nitratesolution staining, the volume of silver deposit at the tooth-restoration interface were scanned by micro CT, and the degree of microleakage was evaluated quantitatively. Results: The microleakage in the conventional light group was significantly higher than that in the soft-start light group and the intermittent light group (P<0.05), but there was no statistical differences between the soft-start light group and the intermittent light group (P<0.05). Conclusion: The soft-start light mode and intermittent light mode can reduce the microleakage of composite resin (3M Z250) more effective than the conventional light mode.

Key words: composite resins, microleakage, photoactivation mode, micro CT, three-dimensional reconstruction

赵岩, 靳趁心. Micro CT评估光照模式对复合树脂微渗漏影响的研究[J]. 口腔医学研究, 2020, 36(3): 276-279.

ZHAO Yan, JIN Chenxin. Micro CT Evaluation of Microleakage in Composites Resin Cured by Various Light Curing Modes[J]. Journal of Oral Science Research, 2020, 36(3): 276-279.

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Micro CT评估光照模式对复合树脂微渗漏影响的研究

Micro CT Evaluation of Microleakage in Composites Resin Cured by Various Light Curing Modes

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