Effectiveness of different obturation techniques in surpassing the ledge formed in simulated curved canals

Brazilian Journal of Oral Sciences

卷:12

Marili Doro Andrade Deonízio¹  Marilisa Carneiro Leão Gabardo²  Wander José da Silva³  Letícia Machado Gonçalves³ 

[1] Federal University of Paraná;

[2] Pontifical Catholic University of Paraná;

[3] UNICAMP;

关键词: Endodontics;    Root canal therapy;    Root canal obturation;    Root canal filling materials;   

DOI  :  10.20396/bjos.v12i2.8641101

来源: DOAJ

【 摘 要 】

Aim: To compare the effectiveness of different obturation techniques in surpassing the ledge formed in simulated curved root canals. Methods: Eighty acrylic-resin blocks with curved canals were instrumented with Gates-Glidden drills to simulate a ledge formation. Then, a K-File #10 was used for trying to surpass the deviation, and the blocks that permitted surpassing were rejected. The remaining blocks were divided into 4 groups according to the obturation technique: lateral condensation, Tagger’s Hybrid technique, Thermafil and System B. The blocks had their images digitalized using a scanner before and after the obturation procedures. The images were analyzed with Image Tool 3.0 software. Statistical analysis was performed by one-way ANOVA at a significant level of 5%. Results: The System B resulted in the highest obturated area (p<0.001). There were no significant differences between the Tagger’s Hybrid technique and Thermafil system regarding the effectiveness in surpassing ledge (p>0.05). The lateral condensation resulted in the worst ability in filling the ledge space (p<0.001). Conclusions: Within the limitations of this study, it was possible to conclude that techniques using heat condensation or gutta-percha thermoplastification were more effective in surpassing the ledge formed in curved canals than the lateral condensation.

【 授权许可】

Unknown