Limited Ability of Three Commonly Used Thermoplasticized Gutta-Percha Techniques in Filling Oval-shaped Canals

作者：De Deus Gustavo^*; Reis Claudia; Beznos Denise; Gruetzmacher de Abranches Alice Maria; Coutinho Filho Tauby; Paciornik Sidney

来源：Journal of Endodontics, 2008, 34(11): 1401-1405.

DOI：10.1016/j.joen.2008.08.015

• Filling techniques
• oval canals
• thermoplasticized gutta-percha

The present study was designed to compare the percentage of gutta-percha-filled area (PGFA) achieved in oval-shaped canals after filling by 3 thermoplasticized techniques. Eighty-seven oval-shaped root canals were prepared and root-filled as follows: lateral condensation (n = 20), thermomechanical compaction (n = 20), wave of condensation in = 20), and Thermafil system in = 20). A cross section of each tooth was made 5 mm from the apex, and the samples were prepared for microscopic analysis. Digital image measurements of the cross-sectioned area of the canal and the gutta-percha were performed, and the PGFA was calculated. Nonparametric statistical analysis was performed with the Kruskal-Wallis H test and post hoc Dunn test. Overall, PGFAs were variable among the experimental groups, ranging from 37.1%-98.5%, and the pooled data from all techniques had a general mean of 69.6% +/- 18%. Thermafil system, wave of condensation, and thermomechanical compaction produced significantly higher PGFAs than lateral condensation (P<.05); however, no significant differences among these techniques were detected (P>.05). Therefore, a limited ability to fill oval-shaped canals was achieved in the 3 thermoplasticized techniques tested. (J Endod 2008;34:1401-1405)

• 出版日期2008-11