Quality of root canal fillings using three gutta-percha obturation techniques
Ho Edith Siu Shan, Chang Jeffrey Wen Wei, Cheung Gary Shun Pan,
소속 상세정보
( Ho Edith Siu Shan ) - the Government of Hong Kong SAR Government Dental Service Department of Health
( Chang Jeffrey Wen Wei ) - University of Hong Kong Faculty of Dentistry Prince Philip Dental Hospital Area of Endodontics
( Cheung Gary Shun Pan ) - University of Hong Kong Faculty of Dentistry Prince Philip Dental Hospital Area of Endodontics
KMID : 1034420160410010022
Abstract
Objectives: The goal of this study was to compare the density of gutta-percha root fillings obturated with the following techniques: cold lateral (CL) compaction, ultrasonic lateral (UL) compaction, and warm vertical (WV) compaction.
Materials and Methods: Thirty-three extracted mandibular first molars, with two separate mesial canals in each, were selected. After instrumentation, the canals were stratified into three groups based on canal length and curvature, and underwent obturation with one of the techniques. No sealer was used in order to avoid masking any voids. The teeth were imaged pre- and post-obturation using micro-computed tomography. The reconstructed three-dimensional images were analyzed volumetrically to determine the amount of gutta-percha present in every 2 mm segment of the canal. P values < 0.05 were considered to indicate statistical significance.
Results: The overall mean volume fraction of gutta-percha was 68.51 ± 6.75% for CL, 86.56 ± 5.00% for UL, and 88.91 ± 5.16% for WV. Significant differences were found between CL and UL and between CL and WV (p < 0.05), but not between UL and WV (p = 0.526). The gutta-percha density of the roots treated with WV and UL increased towards the coronal aspect, but this trend was not noted in the CL group.
Conclusions: WV compaction and UL compaction produced a significantly denser gutta-percha root filling than CL compaction. The density of gutta-percha was observed to increase towards the coronal aspect when the former two techniques were used.
키워드
Lateral condensation technique; Micro-CT; Obturation; Root canal filling Ultrasonic spreader; Vertical compaction
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