Effectiveness of different obturation techniques in the filling of simulated lateral canals.
ABSTRACT The purpose of this in vitro study was to evaluate the ability of lateral compaction of gutta-percha and of five thermoplasticized gutta-percha filling techniques to obturate simulated lateral canals. Sixty extracted single-rooted human teeth were instrumented at the working length to a #35 file before creating three simulated lateral canals on the mesial and distal surfaces of the root, one in each third, using a #15 engine reamer. After enlarging root canals to a #45 file, the teeth were randomly divided into six equal groups of 10 and obturated according to the following techniques: lateral compaction of gutta-percha (group A), hybrid technique (group B), Ultrafil (group C), Obtura II (group D), System B + Obtura II (group E), and Thermafil (group F). AH26 was used as the sealer. A greater number of simulated lateral canals were obturated when Ultrafil, Thermafil, and System B + Obtura II were used, in comparison with canals obturated with the hybrid technique, Obtura II, or lateral compaction of gutta-percha. This difference was statistically significant (p < 0.05). No statistically significant differences were found between results obtained in the obturation of simulated lateral canals in the different thirds of the root (p > 0.05).
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ABSTRACT: The goal of this study was to evaluate the thermoplasticity of conventional and thermoplastic gutta-percha and Resilon ® , a polyester polymer-based material. Specimens with standardised dimensions were made from the following mate-rials: conventional and thermoplastic gutta-percha (Dentsply), conventional and thermoplastic gutta-percha (Endopoints) and Resilon ® . After 24 h, the specimens were placed in water at 70°C for 60 s, and thereafter positioned between two glass slabs. Each set was compressed by a 5-kg weight. Digital images of the specimens before and after compression were obtained and anal-ysed. The thermoplasticity of each material was confirmed by the difference between final and initial areas of each sample. The data were analysed statisti-cally by ANOVA and Tukey's test at a 5% significance level. Resilon ® had the highest thermoplasticity means (P < 0.05). Among the gutta-percha cones, Endopoints TP (thermoplastic) presented the highest thermoplasticity means and differed significantly from the other commercial brands (P < 0.05). Resilon ® had good thermoplasticity, endorsing its use as a thermoplastic root canal filling material.Australian Society of Endodontology Aust Endod J. 01/2007; 33:23-26.
Article: A comparison of three gutta-percha obturation techniques to replicate canal irregularities.[show abstract] [hide abstract]
ABSTRACT: A split-tooth model with artificially created intracanal wall defects was used to compare three gutta-percha (GP) obturation techniques, cold lateral, warm lateral, and warm vertical. The techniques were evaluated and compared based on defect replication quality as a function of defect location and size. The obturations were evaluated on an ordinal scale, 0 to 4, based on how much each defect was replicated. There was a statistically significantly better result with both warm techniques compared to cold lateral obturation, while there was no significant difference between the warm obturation techniques.Journal of Endodontics 09/2006; 32(8):762-5. · 2.88 Impact Factor