Kim Minjin, Jeon Sujin, Seo Min-Seock
Department of Conservative Dentistry, Wonkwang University Daejeon Dental Hospital, Daejeon, Korea.
Restor Dent Endod. 2024 Jul 11;49(3):e28. doi: 10.5395/rde.2024.49.e28. eCollection 2024 Aug.
This study aimed to investigate the endodontic characteristics of mandibular premolars with dens evaginatus (DE) that require endodontic treatment.
Patients who underwent endodontic treatment were enrolled. The inclusion criteria were patients who underwent root canal treatment in the lower permanent teeth with DE and were followed up for at least 1 year. Preoperative clinical and radiographic variables were obtained. The frequency distribution of the preoperative variables was compared using the χ or Fisher's exact tests. The significance of the change in periapical health index (PAI) and root development stages before and after treatment was examined using the Wilcoxon signed-rank test.
A total of 150 teeth of 134 patients with an average age of 15.3 years were included. The percentage distribution comparison of the preoperative variables and obturation techniques revealed significant differences in pulpal and periapical diagnosis, and percussion, and especially regarding age, root development stage, and PAI. Age was the only statistically significant preoperative variable associated with root growth ( < 0.05).
Approximately, 60% of DEs requiring endodontic treatment had immature roots. Age being the most significant predisposing factor, early treatment provides the greatest opportunity for full root development.
本研究旨在调查需要进行牙髓治疗的下颌前磨牙畸形中央尖（DE）的牙髓特征。
纳入接受牙髓治疗的患者。纳入标准为在患有DE的下颌恒牙上接受根管治疗并随访至少1年的患者。获取术前临床和影像学变量。使用χ²检验或Fisher精确检验比较术前变量的频率分布。使用Wilcoxon符号秩检验检查治疗前后根尖健康指数（PAI）和牙根发育阶段变化的显著性。
共纳入134例患者的150颗牙齿，平均年龄15.3岁。术前变量与充填技术的百分比分布比较显示，在牙髓和根尖周诊断、叩诊方面存在显著差异，尤其是在年龄、牙根发育阶段和PAI方面。年龄是与牙根生长相关的唯一具有统计学意义的术前变量（P<0.05）。
大约60%需要进行牙髓治疗的DE牙根未发育成熟。年龄是最重要的易感因素，早期治疗为牙根完全发育提供了最大机会。
