Chee Hui Theng, Wan Bakar Wan Zaripah, Ghani Zuryati Ab, Amaechi Bennett T
Dental Officer, Taman Selasih Dental Clinic, 09000 Kulim, Kedah, Malaysia.
Conservative Unit, School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia.
Dent Res J (Isfahan). 2018 May-Jun;15(3):215-219.
Composite resin (CR) currently is one of the most commonly used material in restoring noncarious cervical lesions (NCCL) due to its strength and esthetics color but has microleakage problem. The aim of this study is to compare the microleakage depth between CR and porcelain in restoring NCCL.
This an study was done by preparing cavities on the buccocervical surface of 62 extracted premolar teeth which randomly assigned to two groups ( = 31) where Group 1 was restored with nanocomposite and Group 2 was cemented with porcelain cervical inlays. They were then subjected to thermocycling before immersion in 2% methylene blue dye for 24 h. Dye penetration depths were measured using Leica imaging system For statistical analysis, independent -test was used to analyze the results ( < 0.05).
Porcelain cervical inlay restorations demonstrated statistically lesser microleakage depth for the cervical margins ( = 0.018) when compared to CR. Deeper microleakage depth at the cervical compared to coronal margins of CR ( = 0.006) but no significant difference of both margins for porcelain cervical inlays ( = 0.600).
Porcelain cervical inlays show lesser microleakage than CR which could be alternative treatment option in restoring NCCL with better marginal seal and esthetics.
复合树脂（CR）因其强度和美观的颜色，目前是修复非龋性颈部病变（NCCL）最常用的材料之一，但存在微渗漏问题。本研究的目的是比较CR和瓷修复NCCL时的微渗漏深度。
本研究通过在62颗拔除的前磨牙的颊颈表面制备窝洞进行，这些牙齿随机分为两组（每组n = 31），其中第1组用纳米复合树脂修复，第2组用瓷嵌体修复。然后对它们进行热循环处理，再浸泡在2%的亚甲蓝染料中24小时。使用徕卡成像系统测量染料渗透深度。对于统计分析，采用独立样本t检验分析结果（P < 0.05）。
与CR相比，瓷嵌体修复在颈部边缘的微渗漏深度在统计学上较小（P = 0.018）。CR颈部边缘的微渗漏深度比冠部边缘更深（P = 0.006），但瓷嵌体修复的两个边缘无显著差异（P = 0.600）。
瓷嵌体的微渗漏比CR小，这可能是修复NCCL时更好的边缘封闭和美观的替代治疗选择。
