Melih Irena, Jakovljević Ankica, Popović Milica, Pesić Dragana
Srp Arh Celok Lek. 2010 May-Jun;138(5-6):287-91. doi: 10.2298/sarh1006287m.
Root canal filling materials are intended to prevent microleakage and passing of microorganisms and their toxins along the root canal space and into the periradicular tissues.
Objective of this in vitro study was to evaluate and compare apical leakage of root canals obturated using a modified warm vertical condensation technique and different materials.
Sixty-five extracted single-root teeth were prepared according to the crown-down/ step-back technique. Each canal was rinsed with 3% NaOCl during and after the preparation. The teeth were divided into 3 groups. Every group was obturated by the same technique, but with different materials: RealSeal system (SybronEndo), gutta-percha with AH Plus (Dentsply Maillefer) and gutta-percha with Acroseal sealer (Septodont). The remaining 20 teeth were in the control group. The teeth were immersed in 1% methylene blue for 72 hours. After that period, the roots were split longitudinally, and dye penetration was measured using a stereomicroscope.
Dye penetration occurred in all groups. The least dye penetration occurred in the RealSeal group (0.33 +/- 0.29 mm), while the highest dye penetration occurred in the Acroseal group (1.11 +/- 0.52 mm). According to the Student's t-test, Acroseal showed significantly more leakage (p < 0.001) than RealSeal and AH Plus materials. The microleakage of RealSeal system was not significantly different (p > 0.05) from that of AH Plus sealer with gutta-percha.
The results suggested that new material Resilon (RealSeal) and conventional combination AH Plus with guttapercha had the least apical dye penetration and provided the best sealing.
根管充填材料旨在防止微渗漏以及微生物及其毒素沿根管间隙进入根尖周组织。
本体外研究的目的是评估和比较采用改良热垂直加压技术及不同材料充填根管后的根尖渗漏情况。
按照冠向下/逐步后退技术对65颗拔除的单根牙进行预备。预备过程中及预备后用3%次氯酸钠冲洗每个根管。将牙齿分为3组。每组均采用相同技术进行充填，但使用不同材料：RealSeal系统（SybronEndo公司）、牙胶尖与AH Plus糊剂（登士柏迈丽菲公司）以及牙胶尖与Acroseal封闭剂（Septodont公司）。其余20颗牙齿作为对照组。将牙齿浸泡在1%亚甲蓝中72小时。此后，将牙根纵向劈开，用体视显微镜测量染料渗透情况。
所有组均出现染料渗透。RealSeal组的染料渗透最少（0.33±0.29毫米），而Acroseal组的染料渗透最多（1.11±0.52毫米）。根据学生t检验，Acroseal组的渗漏明显多于RealSeal组和AH Plus材料组（p<0.001）。RealSeal系统的微渗漏与牙胶尖加AH Plus封闭剂的微渗漏无显著差异（p>0.05）。
结果表明，新型材料Resilon（RealSeal）和传统的牙胶尖与AH Plus组合的根尖染料渗透最少，封闭效果最佳。
