Obturação tridimensional dos canais radiculares – lentulo ou lima endodôntica?
Abstract
No protocolo UFSC para tratamento endodôntico de dentes decíduos, é utilizado Ca(OH)2 em propilenoglicol para curativos de demora e OZE para obturação definitiva do canal, sendo levados a ele pela espiral lentulo ou lima endodôntica. Portanto, foi objetivo desta pesquisa verificar in vitro a eficiência da obturação em profundidade(P) e lateralidade (L) com pasta de Ca(OH) 2 e cimento OZE, nos limites pré-estabelecidos pelo preparo biomecânico. Para isto, 4 grupos de 10 dentes cada, foram obturados com: Ca(OH) 2 levado com lentulo e lima (GI e GII), e os dois grupos restantes (GIII e GIV) obturados com OZE levados também com lentulo e lima, respectivamente. A obediência da obturação aos limites pré-estabelecidos foram analisados em radiografias, nos sentidos M-D e V-L, por 3 examinadores. As distâncias em profundidade foram medidas, conferindo escore 0 (distância de 0 a -1 mm do limite ideal), escore 1 (distância de ±2 e ±3 mm do limite ideal). Para lateralidade as obturações eram adequadas (A) quando todo o espaço M-D do canal estava preenchido, caso contrário eram consideradas inadequadas (I). Os resultados demonstraram que o GII apresentou melhores resultados, obedecendo ao limite apical de obturação (Teste de Mann-Whitney/p = 0,0059). Quando o OZE foi utilizado não houve diferença entre GIII e GIV com 80% de obturações adequadas. O Teste de Proporção mostrou que a lentulo preenche os canais em lateralidade de forma mais efetiva independente de ser Ca(OH) 2 ou OZE (Z = 4,05/p < 0,001). Concluísse que a lentulo e a lima são efetivos, em obturar os canais em profundidade, porém em lateralidade a lentulo é superior à lima, sugerindo que em alguns casos devemos utilizar os métodos combinados, para evitar o extravasamento do material obturador.
UNITERMOS: obturação; canal radicular; broca lentulo.
SUMMARY
In the UFSC protocol for endodontic treatment of deciduos teeth, the Ca(OH) 2 and propilenoglicol paste is used as temporary obturation and ZOE cement as definitive obturation. Both are carried to the canal with Lentulo spiral or endodontic file. The objective of this study was to verify ‘in vitro’ the efficiency of the obturation in deep (D) and laterality (L) in the limits establishes priori through the biomechanical preparation. For this proposal 4 Groups, with 10 teeth each, were filled with: Ca(OH)2 + Lentulo spiral (GI), Ca(OH)2 + endodontic file (GII), ZOE + Lentulo spiral (GIII) and ZOE + endodontic file (GIV). The obedience of the obturation to the limits was analyzed in the M-D and B-L radiographied, by three examiners. The distances in deep were measure and scores 0 (0 to -1 mm from the ideal limit) and 1 (±2 and ±3 mm from the ideal limit). Considering laterality, the obturations were adequate when all the canal M-D were filled (A) and inadequate (I) when this situation was not present. It was showed that GII had the best results, considering the obturation apical limit (Mann-Whitney test/p = 0,059). When ZOE was used, there was no difference between GIII and GIV, with 80% of the fillings bring adequates. The Proportion test showed that Lentulo spiral filled the canals in laterality more effective, regarding the material used (Z = 4,05/p < 0,001). It was conclude that Lentulo spiral and endodontic file were effective in filling the canals in deep, but in laterality the Lentulo was superior to the file, suggesting that in some cases the methods may be combined, to avoid the overfilling of the filling material.
UNITERMS: obturation; root canal; Lentulo spiral.
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