Department of Conservative Dentistry and Endodontics, VSPM Dental College and Research Centre, Nagpur, Maharashtra, India, Nagpur.
Indian J Dent Res. 2021 Jul-Sep;32(3):348-353. doi: 10.4103/ijdr.IJDR_90_20.
Class V cavity presents a clinical challenge in the field of restorative dentistry as the margin placement is partially in enamel and partly in cementum, and the trouble associated with this design is the microleakage at the tooth restoration interface.
To evaluate and compare marginal microleakage in Class V cavities when restored with flowable composite and Cention-N restorative material.
This in-vitro study was performed on 30 human maxillary premolars, which were extracted for orthodontic reasons. Class V cavities were prepared on the buccal surfaces of each tooth. After application of seventh-generation bonding agent (3M ESPE, Single Bond Universal Adhesive), the teeth were divided into two groups of 15 each and restored with flowable composite (3M ESPE Filtek Z350 XT) and Cention-N (Ivoclar Vivadent) and were subjected to thermocycling. The teeth were then immersed in 0.1% Rhodamine B dye for 48 h. They were sectioned longitudinally into mesial and distal parts with the help of an isomet diamond saw. The sections were observed under a confocal laser scanning microscope (CLSM).
The results were subjected to statistical analysis using the Mann-Whitney U test and Pearson's Chi-square test.
The analysis showed statistically significant results among the groups. Cention-N showed lesser microleakage, which was statistically significant when compared to flowable composite (P = 0.005).
Cention-N showed significantly lesser leakage and better adaptation than flowable composite.
在修复牙科领域，V 类洞型的临床治疗具有挑战性，因为边缘的位置部分在牙釉质，部分在牙骨质，而这种设计带来的问题是牙修复体界面的微渗漏。
评估和比较使用流动复合树脂和 Cention-N 修复材料修复 V 类洞型时的边缘微渗漏。
本体外研究在 30 颗因正畸原因而拔除的上颌前磨牙上进行。在每个牙齿的颊面制备 V 类洞型。应用第七代粘结剂（3M ESPE，Single Bond Universal Adhesive）后，将牙齿分为两组，每组 15 颗，分别用流动复合树脂（3M ESPE Filtek Z350 XT）和 Cention-N（Ivoclar Vivadent）修复，并进行热循环。然后将牙齿浸入 0.1%罗丹明 B 染料中 48 小时。借助等径金刚石锯将牙齿沿颊舌方向纵向切成近远中两个部分。使用共聚焦激光扫描显微镜（CLSM）观察切片。
采用曼-惠特尼 U 检验和皮尔逊卡方检验对结果进行统计学分析。
分析显示各组之间存在统计学显著差异。Cention-N 显示出的微渗漏较少，与流动复合树脂相比具有统计学意义（P=0.005）。
Cention-N 显示出比流动复合树脂更少的渗漏和更好的适应性。
