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

Brazilian Journal of Oral Sciences

Marilisa Carneiro Leão Gabardo²  Wander José Da Silva¹  Letícia Machado Gonçalves¹  Marili Doro Andrade Deonízio¹ 

[1] ,Pontifical Catholic University of Paraná School of Health and Biosciences Area of Collective HealthCuritiba PR ,Brazil

关键词: endodontics;    root canal therapy;    root canal obturation;    root canal filling materials;   

DOI  :  10.1590/S1677-32252013000200013

来源: SciELO

【 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】

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