Department of Endodontology, Academic Centre of Dentistry Amsterdam (ACTA), University of Amsterdam and VU University, Amsterdam, The Netherlands.
J Endod. 2010 Jan;36(1):139-42. doi: 10.1016/j.joen.2009.08.011.
Increased apical enlargement might be achieved with S-ApeX files. However, S-ApeX preparations exhibit a small taper, which might hinder the performance of the root filling. The aim of this study was to compare the percentage of gutta-percha-filled canal areas (PGCA) in root canals after preparation with GT and S-ApeX instruments.
Four groups of maxillary lateral incisors (n = 20) were root canal treated. Canals were prepared with S-ApeX files to size 60 in 2 groups or with a GT system to size 30 taper 0.06 in other groups. Canals were filled with gutta-percha and AH26 by using a lateral compaction (LC) technique or a combined lateral and vertical compaction (LCVC) technique. Roots were then sectioned 2, 4, 6, and 8 mm from the apex. The area of the canal and gutta-percha was measured in each section, and the PGCA was calculated.
The overall PGCA in the S-ApeX/LC group was significantly lower than that in other groups (analysis of variance, P = .001). The average PGCA values were 97.6%, 99.3%, and 98.5% for the GT/LC, S-ApeX/LCVC, and GT/LCVC groups, respectively. The differences between these groups were not statistically significant (analysis of variance, P = .21).
A combined lateral and vertical compaction technique achieved comparable PGCA in canals prepared in maxillary lateral incisors by using S-ApeX or GT instruments.
S-ApeX 锉可增大根尖部的扩大率。然而，S-ApeX 锉预备后的锥度较小，可能会影响根管充填的效果。本研究旨在比较 S-ApeX 锉和 GT 锉预备后根管内牙胶的充填率（PGCA）。
选择 40 颗上颌侧切牙，随机分为 4 组，每组 10 颗。2 组用 S-ApeX 锉预备至 60 号，2 组用 GT 锉预备至 30 号，锥度 0.06。用侧向加压（LC）或侧向联合垂直加压（LCVC）技术根管充填牙胶和 AH26。从根尖起每 2、4、6、8mm 处将牙体纵剖，测量根管和牙胶的横截面积，计算 PGCA。
S-ApeX/LC 组的总体 PGCA 明显低于其他组（方差分析，P =.001）。GT/LC、S-ApeX/LCVC 和 GT/LCVC 组的平均 PGCA 值分别为 97.6%、99.3%和 98.5%。组间差异无统计学意义（方差分析，P =.21）。
在使用 S-ApeX 锉或 GT 锉预备上颌侧切牙根管时，联合使用侧向和垂直加压技术可获得相似的 PGCA。
