Abdel-Maksoud Heba B, Bahanan Aziza W, Alkhattabi Lujain J, Bakhsh Turki A
Restorative Dentistry Department, King Abdulaziz University, P.O. Box 80209, Jeddah 21589, Saudi Arabia.
Restorative Dentistry Department, Faculty of Dentistry, Suez Canal University, Ismailia 41611, Egypt.
Materials (Basel). 2021 Dec 12;14(24):7668. doi: 10.3390/ma14247668.
The aim of the present study was to evaluate the adaptation of newly introduced bioactive restorative materials to the cavity floor using cross-polarization optical coherence tomography (CP-OCT).
Round class V cavities were prepared on the proximal surfaces of sixty non-carious human anterior teeth (0.5 mm depth × 4 mm diameter), which were divided into groups according to the restorative material (n = 15). In the VF group, Vertise flow composite (Kerr, Orange, CA, USA) was used, in the BF group, Beautifil II composite (Shofu, Koyoto, Japan) was used, and in the AB group, ACTIVA BioACTIVE composite (Pulpdent, Watertown, NY, USA) was used. Cavities were restored using the bulk filling technique and cured according to the manufacturers' instructions. Then, the specimens were immersed in a contrasting agent, and image acquisitions were taken by CP-OCT to calculate the adaptation percentage by using an image analysis software.
B-scans showed a diffuse bright band of white pixels at the tooth-resin interface that was interpreted as a micro-gap present between the cavity floor and restorative material. The Kruskal-Wallis test showed a statistically significant difference between all tested groups with the AB group representing the least gap formation, followed by the BF group, and then the VF group, which demonstrated the highest gap formation.
In class V cavities, better adaptation to the cavity floor can be obtained when using ACTIVA BioACTIVE more than Vertise flow and Beautifil II composites. In addition, CP-OCT is considered a non-destructive imaging tool that helps in evaluating the quality of the tooth-restoration interface when bioactive composites are used.
本研究旨在使用交叉极化光学相干断层扫描（CP-OCT）评估新引入的生物活性修复材料与洞底的适应性。
在60颗无龋的人前牙近中面制备圆形V类洞（深度0.5mm×直径4mm），根据修复材料将其分为几组（n = 15）。在VF组中，使用Vertise flow复合树脂（美国加利福尼亚州奥兰治市克尔公司），在BF组中，使用Beautifil II复合树脂（日本京都府松风公司），在AB组中，使用ACTIVA生物活性复合树脂（美国纽约州沃特敦市Pulpdent公司）。采用整块充填技术修复窝洞，并按照制造商的说明进行固化。然后，将标本浸入造影剂中，通过CP-OCT采集图像，使用图像分析软件计算适应百分比。
B扫描显示牙齿-树脂界面处有一条白色像素的弥散亮带，被解释为洞底与修复材料之间存在的微间隙。Kruskal-Wallis检验显示所有测试组之间存在统计学显著差异，AB组形成的间隙最小，其次是BF组，然后是VF组，VF组形成的间隙最大。
在V类洞中，使用ACTIVA生物活性复合树脂比Vertise flow复合树脂和Beautifil II复合树脂能更好地适应洞底。此外，CP-OCT被认为是一种无损成像工具，有助于在使用生物活性复合树脂时评估牙齿-修复体界面的质量。
