Department of Pediatric and Preventive Dentistry, Teerthanker Mahaveer Dental College and Research Centre, Moradabad, Uttar Pradesh, India.
Preventive Dental Science Department, Faculty of Dentistry, Najran University, Najran, 55461, Saudi Arabia.
BMC Oral Health. 2024 Sep 16;24(1):1100. doi: 10.1186/s12903-024-04817-2.
Apexification is a procedure that promotes apical closure by forming mineralized tissue in the apex region of a nonvital young permanent tooth. Calcium silicate-based cement like Mineral trioxide aggregate (MTA) and Biodentine are commonly employed as apical barriers to facilitate this process. Microleakage, defined as the leakage along the junction between the canal wall and filling material, is a crucial aspect to assess in MTA and Biodentine applications as apical barriers, as it directly impacts the prevention of bacterial seepage and maintenance of structural integrity. The current study aims to assess the microleakage of MTA and Biodentine when used as apical barriers in simulated young permanent teeth.
From a total of 128 extracted teeth, 114 were selected for the study and randomly allocated into three groups: G1 (MTA), G2 (Biodentine), and G3 (Control), with 38 teeth per group. After excluding 5 teeth from each group due to issues such as canal calcification, breakage during sectioning, and procedural errors, 33 teeth were analyzed to ensure equal distribution. To simulate young permanent teeth, samples were instrumented using a person-reamer with a diameter of 1.7 mm. A 4 mm thick apical plug of MTA and Biodentine was placed in G1 and G2, respectively, while G3 was the control group. Apical microleakage in all experimental groups was assessed using a dye penetration method. Specimens were longitudinally sectioned and examined under a stereomicroscope with graded eyepiece.
The Kruskal-Wallis test revealed variations in mean apical microleakage among the groups: G1 recorded 0.67, G2-0.16, and G3-1.62, with G2 showing the lowest value and G3 group exhibiting the highest.
Biodentine was found to excel in its ability to create a secure seal and function effectively as an apical barrier in simulated young permanent teeth. These results underscore its potential as a highly efficient material for dental applications, particularly in scenarios requiring reliable sealing and barrier formation in the root canal system of developing permanent teeth.
根尖诱导成形术是一种通过在年轻恒牙的根尖区域形成矿化组织来促进根尖闭合的方法。硅酸钙基水泥，如矿化三氧化物凝聚体（MTA）和 Biodentine，通常被用作根尖屏障，以促进这个过程。微渗漏是指沿着根管壁和填充材料交界处发生的渗漏，作为根尖屏障的 MTA 和 Biodentine 应用中需要评估的一个关键方面，因为它直接影响到防止细菌渗透和维持结构完整性。本研究旨在评估 MTA 和 Biodentine 作为模拟年轻恒牙根尖屏障时的微渗漏情况。
从总共 128 颗拔出的牙齿中，选择 114 颗用于研究，并随机分为三组：G1（MTA）、G2（Biodentine）和 G3（对照组），每组 38 颗牙齿。每组中因根管钙化、切片时断裂和程序错误等问题排除 5 颗牙齿后，分析了 33 颗牙齿以确保均匀分布。为了模拟年轻恒牙，使用直径为 1.7mm 的人扩孔器对样本进行器械处理。在 G1 和 G2 中分别放置 4mm 厚的 MTA 和 Biodentine 根尖塞，而 G3 为对照组。使用染料渗透法评估所有实验组的根尖微渗漏。将标本纵向切开，在带有分级目镜的立体显微镜下检查。
Kruskal-Wallis 检验显示各组根尖微渗漏均值存在差异：G1 为 0.67，G2 为 0.16，G3 为 1.62，G2 组值最低，G3 组值最高。
Biodentine 在模拟年轻恒牙中表现出卓越的密封能力，有效地作为根尖屏障。这些结果突出了它在牙科应用中的潜在优势，特别是在需要在发育中恒牙的根管系统中实现可靠密封和屏障形成的情况下。
