Avaliação de Técnicas de Obturação para Canais Instrumentados pelo Sistema Reciproc®

Abstract

Objetivo: Investigar se a modelagem do sistema Reciproc interfere na realização da técnica Sistema (TC) e compará-las com outras duas técnicas: Cone Único sistema Reciproc (CU) e Mcspadden Modificada(MC), quanto à porcentagem da área preenchida por gutapercha, cimento Ahplus e áreas vazias, no terço apical em canais instrumentados pelo sistema Reciproc ® . Metodologia: Quinze raízes mesiais de molares inferiores foram instrumentadas por instrumento único recíproco R25 e separadas nos grupos: CU, TC e MC. Após as obturações os dentes foram seccionados nos níveis de 2mm e 4mm do forame e imagens foram obtidas para medir a porcentagem da área do canal obturada com os materiais obturadores e os espaços vazios, sendo os dados submetidos ao teste estatístico de Kruskal-Wallis. Resultados: Comparando-se as técnicas sem distinção dos níveis, verificou-se que, para o preenchimento Guta Percha, TC se diferenciou de CU e de MC, apresentando média maior que ambas. Para o Cimento, novamente as diferenças surgiram entre TC e as outras duas, mas com TC apresentando média menor que elas. Com relação à Área Vazia não foi encontrada diferença estatisticamente significativa entre TC, CU e MC. Conclusões: A modelagem proporcionada pela lima R25 do Sistema Reciproc não interfere no emprego da técnica TC. O preenchimento com Guta Percha apresentou maior media na técnica TC, em conseqüência, o Cimento apresentou a menor média, ambos com diferenças significantes para MC e CU. Com relação à Área Vazia o comportamento foi igual para todas as técnicas.Obturação do Canal Radicular; Endodontia; Materiais Restauradores do Canal Radicular.Objective: To investigate whether the shaping promoted by the Reciproc ® system interferes with performing the System technique (TC) in comparison with two other techniques -Single Cone Reciproc ® system (CU) and Modified Mcspadden (MC) -, relative to the percentage of the area filled by gutta-percha and Ahplus sealer and non-filled areas in the apical third of canals instrumented with the Reciproc ® system. Methods: Fifteen mesial roots of mandibular molars were instrumented by a single reciprocate R25 file and assigned to three groups: CU, TC and MC. After root filling, the teeth were sectioned at 2 and 4 mm short of the apical foramen. Images were captured to calculate the percentages of canal area occupied by and free of filling material. Data were analyzed statistically by the Kruskal-Wallis test. Results: Comparison of the techniques regardless of apical levels revealed that for gutta-percha filling, TC presented significantly greater means than CU and MC. For the sealer, TC presented significantly lower means than CU and MC. Regarding the area free of filling material, no statistically significant difference was found among TC, CU and MC. Conclusions: Canal shaping produced by the Reciproc ® system's R25 file does not interfere with the use of the TC technique. Gutta-percha filling presented the greatest mean value with the TC technique and sealer filling presented the lowest mean value, both with sig...

Efficacy of Protaper Next Compared to Wave One in Intraradicular Dentin Wear in Flattened Root Canals

“…In view of this limitation, a technique was developed in which only one file of the Protaper Universal system, F2, was used in all root canal instrumentation based on reciprocating kinematics instead of continuous, in order to simplify the preparation steps and reduce the instrument fatigue [8]. From this proposal of intervention in root canals, several studies were conducted to compare the effectiveness of the continuous and reciprocating movements [1,10,13], emphasizing that the nickel and titanium instruments when used with reciprocating movements showed greater resistance, longer shelf life, greater ability to maintain canal centering, lower apical transport, and less extrusion of dentin remains in the periapex, compared to continuous instrumentation [2]. as more resistant to cyclic fatigue [16].…”

“…Mechanical preparation is an important step in endodontic treatment and consists of eliminating microorganisms and their by-products from the root canal system. However, the anatomical variability that characterizes the root canal makes it difficult or even impossible to completely disinfect the pulp cavity using instruments [1].…”

Thermoplastic endodontic obturation – TC system: case report

“…The main purpose of endodontic filling is to fill the space of root canals with the best possible adaptation to the walls, through the use of a homogeneous mass of gutta-percha and a thin layer of endodontic cement. Piati et al [5] state that the seal must be sufficient to prevent reinfection by fluids and bacterial byproducts. The obturation techniques assist in this process, but the strong influence of the anatomical variability of root canals may lead to failure.…”

“…In this system alpha -phase gutta-percha is plasticized by a low intensity electric heater, using lower temperature and longer heating time. Piati et al [5] affirm hat in this way the guttapercha syringes can be reused without changing the properties of the material. It is not necessary to use the main or accessories cones.…”

“…It is not necessary to use the main or accessories cones. The results of recent research on the use of TC system have been very satisfactory as the filling of curved and flattened root canals [5,6].…”