Opal Shireen, Garg Shalini, Sharma Deepak, Dhindsa Abhishek, Jatana Isha
Senior lecturer, Department of Pediatric and Preventive Dentistry, BRS Dental College, Sultanpur, Haryana, India;, Email:
Professor, in the Department of Pediatric and Preventive Dentistry, College of Dental Sciences and Research, Maharishi Markandeshwar University, Mullana, Ambala, Haryana.
Pediatr Dent. 2017 Jan 15;39(1):1-8.
The purpose of this study was to evaluate macroscopically and ultrastructurally the effect of calcium hydroxide cement (CH) and resin-modified glass ionomer cement (RMGIC) compared with gutta percha (control) as a lining material on carious dentin after partial caries removal and sealing.
Twenty-seven permanent molars with deep carious lesions underwent partial caries removal with the application of CH, RMGIC, or gutta percha (control) and were then sealed for three months. After a partial caries removal and sealing period, the dentin was macroscopically assessed (for color, consistency, and humidity) and further analyzed by scanning electron microscope to assess the ultrastructural changes in dentin (lumen size, mineralization of tubules, occlusion of tubules by cements, and bacterial ingress). The effect of treatment in each group was statistically analyzed.
Dentin darkening and hardening were observed after the sealing period in all groups. However, there was no difference in the color after treatment among the three groups. It was observed that RMGIC showed a significant reduction in the size of the lumen compared to CH and the control.
Partial caries removal and sealing resulted in dentin hardening, darkening, and dentin remineralization, irrespective of the dentin protection used.
本研究旨在从宏观和超微结构层面评估，在部分龋坏去除并封闭后，作为衬层材料的氢氧化钙水门汀（CH）、树脂改性玻璃离子水门汀（RMGIC）与牙胶（对照）相比，对龋坏牙本质的影响。
选取27颗患有深龋病变的恒牙，分别应用CH、RMGIC或牙胶（对照）进行部分龋坏去除，然后封闭三个月。在部分龋坏去除及封闭期后，对牙本质进行宏观评估（颜色、质地和湿度），并通过扫描电子显微镜进一步分析，以评估牙本质的超微结构变化（管腔大小、牙本质小管矿化、水门汀对牙本质小管的封闭以及细菌侵入情况）。对每组治疗效果进行统计学分析。
在封闭期后，所有组均观察到牙本质变黑和变硬。然而，三组治疗后的颜色并无差异。观察发现，与CH和对照组相比，RMGIC的管腔大小显著减小。
无论使用何种牙本质保护材料，部分龋坏去除并封闭都会导致牙本质硬化、变黑以及牙本质再矿化。
