光照射条件对聚合物牙科修复体下间隙形成的影响；光学相干断层扫描研究

Effect of light irradiation condition on gap formation under polymeric dental restoration; OCT study.

作者信息

Bakhsh Turki A, Tagami Jyunji, Sadr Alireza, Luong Minh N, Turkistani Alaa, Almhimeed Yasser, Alshouibi Ehab

机构信息

Restorative Dentistry Department, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 215-89, Saudi Arabia; School of Dentistry, Alfarabi Private College, Jeddah, Saudi Arabia.

Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.

出版信息

Z Med Phys. 2020 Aug;30(3):194-200. doi: 10.1016/j.zemedi.2020.02.001. Epub 2020 Feb 26.

DOI:10.1016/j.zemedi.2020.02.001

PMID:32113749

Abstract

OBJECTIVE

To investigate the effect of two light-curing systems; quartz tungsten-halogen (QTH) and light-emitting diode (LED), and irradiation time on interfacial gap formation of dental composite resin restorations bonded with an adhesive resin using optical coherence tomography (OCT).

MATERIALS AND METHODS

Forty cavities were prepared in extracted human molar teeth and divided into four groups (n=10) based on the type of light curing system QTH (LITEX 680A) and LED (Demi Plus) and curing duration (10 s or 40 s). A single-step self-etching dental adhesive (Tetric® N-Bond; Ivoclar Vivadent AG, Schaan, FL, Liechtenstein) was applied and polymerized with QTH for 10 s (QTH-10), or for 40 s (QTH-40). Similarly, the adhesive in LED-10 and LED-40 groups was polymerized with an LED for 10 s or 40 s, respectively. Then, all specimens were restored with Filtek™ Z350 XT flowable composite (3M ESPE AG, St. Paul, MN, USA) and immersed in ammoniacal silver-nitrate contrasting solution. Cross-sectional images were recorded at every 250μm using cross-polarization OCT system (CP-OCT; IVS-300, Santec, Komaki, Aichi, Japan). Image analysis to quantify the percentage of gap at resin-dentin interface was performed using a custom plugin for ImageJ software.

RESULTS

Data analysis using one-way ANOVA showed a significant difference in mean gap percentage between the four test groups (p<0.0001). Mean gap percentage values were 75.8%, 53.2%, 9.9% and 5.6%. The highest for LED-10 followed by LED-40 (p <0.05). QTH-40 revealed a slightly better adaptation compared with QTH-10, but the difference between them was not significant (p <0.05).

CONCLUSION

CP-OCT with a contrast agent is a useful non-invasive imaging tool for dental composite resin materials. QTH showed better results than LED under the experimental conditions. When using an LED light-curing unit, prolonged irradiation improved interfacial adaptation of dental composite bonded with a self-etching adhesive.

摘要

目的

使用光学相干断层扫描（OCT）研究两种光固化系统（石英钨卤素灯（QTH）和发光二极管（LED））以及照射时间对用粘结树脂粘结的牙科复合树脂修复体界面间隙形成的影响。

材料与方法

在拔除的人磨牙上制备40个窝洞，根据光固化系统的类型（QTH（LITEX 680A）和LED（Demi Plus））以及固化持续时间（10秒或40秒）分为四组（n = 10）。应用单步自酸蚀牙科粘结剂（Tetric® N-Bond；Ivoclar Vivadent AG，Schaan，FL，列支敦士登），并用QTH固化10秒（QTH - 10）或40秒（QTH - 40）。同样，LED - 10组和LED - 40组中的粘结剂分别用LED固化10秒或40秒。然后，所有标本用Filtek™ Z350 XT流动复合树脂（3M ESPE AG，圣保罗，明尼苏达州，美国）修复，并浸入氨性硝酸银对比溶液中。使用交叉偏振OCT系统（CP - OCT；IVS - 300，Santec，小牧市，爱知县，日本）每隔250μm记录横截面图像。使用ImageJ软件的自定义插件进行图像分析，以量化树脂 - 牙本质界面处间隙的百分比。

结果

使用单因素方差分析进行数据分析表明，四个测试组之间的平均间隙百分比存在显著差异（p < 0.0001）。平均间隙百分比值分别为75.8%、53.2%、9.9%和5.6%。LED - 10组最高，其次是LED - 40组（p < 0.05）。QTH - 40组与QTH - 10组相比显示出稍好的适应性，但它们之间的差异不显著（p < 0.05）。