Holan G, Fuks A B
Department of Pediatric Dentistry, The Hebrew University, Hadassah Faculty of Dental Medicine, Jerusalem, Israel.
Pediatr Dent. 1993 Nov-Dec;15(6):403-7.
Maintaining a successfully root-treated primary molar has the advantage of preserving the natural tooth--the best possible space maintainer. The purpose of this study was to compare the success of endodontic treatment of nonvital primary molars using ZOE with that of KRI paste. Of 78 necrotic primary molars, 34 were filled with ZOE and 44 with an iodoform-containing paste (KRI). The canals were prepared with files, rinsed with saline and filled with one of the resorbable pastes, using a spiral Lentulo on a low-speed handpiece. A radiograph was exposed immediately postoperatively to observe whether the root filling was flush, underfilled, or overfilled. The effect of length of fill on the treatment outcome also was evaluated. Teeth were examined periodically clinically and radiographically to assess success of the treatment. Follow-up interval varied from 12 to more than 48 months. Overall success rate for KRI paste was 84% versus 65% for ZOE, which was statistically significant (P < 0.05). Overfilling with ZOE led to a failure rate of 59% as opposed to 21% for KRI (P < 0.02). Conversely, underfilling led to similar results, with a failure rate of 17% for ZOE and 14% for KRI. These results support the clinical efficacy of root filling with KRI paste as a treatment option for nonvital primary molars.
成功保留经过根管治疗的乳磨牙具有保留天然牙齿这一优势——天然牙齿是最佳的间隙保持器。本研究的目的是比较使用氧化锌丁香油糊剂（ZOE）和含碘仿糊剂（KRI）对无活力乳磨牙进行根管治疗的成功率。在78颗坏死乳磨牙中，34颗用ZOE充填，44颗用含碘仿糊剂（KRI）充填。用锉预备根管，用生理盐水冲洗，并用低速手机上的螺旋输送器填入其中一种可吸收糊剂。术后立即拍摄X线片，观察根管充填是否恰填、欠填或超填。还评估了充填长度对治疗结果的影响。定期对牙齿进行临床和影像学检查，以评估治疗的成功率。随访时间从12个月到超过48个月不等。KRI糊剂的总体成功率为84%，而ZOE为65%，差异有统计学意义（P<0.05）。ZOE超填导致的失败率为59%，而KRI为21%（P<0.02）。相反，欠填导致的结果相似，ZOE的失败率为17%，KRI为14%。这些结果支持了用KRI糊剂进行根管充填作为无活力乳磨牙治疗选择的临床疗效。
