Evaluation of apical leakage of white MTA associated with two different vehicles / Avaliação da infiltração apical do MTA branco associado a dois diferentes veículos

Objective - Compare ex vivo apical leakage of white Mineral Trioxide Aggregate (MTA) associated with distilled water or AH Plus endodontic sealer when used as retrofilling materials. Methods - Forty-four extracted human molars were randomly distributed into four groups. Their distal/palatine roots were sectioned and chemical-mechanical preparation was performed by the step technique up to instrument #55. The roots were filled with gutta-percha cones and endodontic sealer (Tagger's hybrid technique). The roots had the apex removed with a 90º angulation, and after sealing, ultrasonic retro preparations were performed (depth 3mm), following the long axis of the root. The retrograde cavities were retrofilled with White MTA powder associated with distilled water (Group I) or AH Plus endodontic sealer (Group II). In Group III (positive control) no retrofilling was performed and the specimens from Group IV (negative control) were completely covered with sealant.The roots were immersed in Indian ink and kept in an oven (37ºC, 48 hours). Longitudinal wear of the root apical portion was performed in the vestibular-palatine direction, in order to analyze leakage. Results - Among the experimental groups, Group II showed less leakage than Group I (p<0.05). Conclusion - The association MTA/AH Plus sealer showed less marginal leakage when compared with MTA/distilledwater.

Objetivo - Comparar ex vivo a infiltração apical do Mineral Trióxido Agregado (MTA) associado à água destilada ou ao cimento endodôntico AH Plus quando usados materiais retro-obturadores. Métodos - Quarenta e quatro molares foram randomicamente distribuídos em quatro grupos. Os dentes tiveram as raízes distais ou palatinas seccionadas e o preparo químico-mecânico realizado pela técnica escalonada até o instrumento #55. As raízes foram obturadas com cones de guta-percha e cimento endodôntico (Técnica híbrida de Tagger). As raízes tiveram os ápices removidos com uma angulação de 90º e, após a impermeabilização externa, foram feitos retro-preparos ultrassônicos (3 mm de profundidade), seguindo o longo-eixo radicular. As cavidades retrógradas foram preenchidas com o pó do MTA branco associado à água destilada (Grupo I) ou ao cimento endodôntico AH Plus (Grupo II). No Grupo III (controle positivo), não houve o preenchimento das cavidades e, os espécimes do Grupo IV (controle negativo) foram completamente cobertos com o material impermeabilizante. As raízes foram imersas em tinta Nanquim, permanecendo por 48 horas a 37ºC. Cortes longitudinais foram feitos na porção apical no sentido vestíbulo-palatino, a fim de analisar-se a infiltração. Resultados - Entre os grupos experimentais, o Grupo II apresentou menores infiltrações do que o Grupo I (p<0,05). Conclusão - A associação entre o MTA branco e o cimento AH Plus apresentou menores infiltrações quando comparada ao MTA branco e a água destilada.

Utilização de cimento ionomérico fotopolimerizável no tratamento de perfuração radicular: relato de caso / Use of glass ionomer light-cure in treatment of root perforation: case report

Perfuração radicular é uma comunicação entre o sistema de canais radiculares e os tecidos de sustentação do dente e resulta em sérias complicações com prognóstico incerto. Para o tratamento da perfuração pode-se utilizar a via endodôntica, via cirúrgica ou ambas. Um dos elementos dentais com maior incidência de perfurações é o incisivo lateral superior, cuja inclinação radicular no sentido mésio-palatino contribui para erros de procedimentos, tanto durante abertura coronária, quanto no preparo químico-mecânico. Os cimentos de ionômero de vidro modificados por resina por apresentarem características de biocompatibilidade, adesão dentinária e serem esteticamente aceitáveis são utilizados para selar estas lesões próximas ao sulco gengival. O objetivo deste trabalho é relatar o caso clínico de um paciente atendido na Clínica Integrada do curso de Odontologia da UFC, onde durante o acesso endodôntico ao dente 12 ocorreu extensa perfuração radicular no nível de 1/3 médio. Após a localização correta do trajeto do canal, este foi instrumentado pela técnica crown-down e obturado pela técnica híbrida de Tagger. Em seguida, tentou-se o fechamento da perfuração via canal radicular com o material Super-EBA e, em decorrência de excessivo extravasamento deste material para a região do ligamento periodontal, optou-se pelo acesso cirúrgico, sendo a cavidade preenchida com cimento ionomérico fotopolimerizável. Após 36 meses, o paciente não apresenta nenhuma sintomatologia dolorosa, estando o dente com função mastigatória restabelecida

Root perfuration is a communication between the root canal system and the tooth supporting tissues and result in serious complications with uncertain prognosis. For the treatment of root perfuration can be used the root canal way, surgical approach or both. One of teeth with the highest incidence of perforations is the maxillary lateral incisor, whose inclination root in a mesio-palatal contributes to procedural errors, either during coronary opening or in the chemomechanical preparation. The resin-modified glass ionomer cements exhibit biocompatibility characteristics, dentin bonding and be aesthetically acceptable in restorations are used for sealing these lesions near to the gingival sulcus. The aim of this study is to report a clinical case of one patient in the Integrated Clinic of the UFC dental clinic, where during endodontic access to tooth 12 occurred a extensive radicular perfuration in the medium third level. After the correct localization of root canal pathway, it was instrumented by crown-down technique and filled by the Tagger’s hybrid technique. Next, was tried to close the perforation through the root canal with the Super-EBA material, and due to excessive leakage of this material to the region of the periodontal ligament, was opted for surgical access, and the cavity was filled with light-cured glass ionomer cement. After 36 months, the patient shows no pain symptoms, with the function tooth restored

Avulsion and replacement of the tooth element fractured at the level of the middle 1/3: a case report.

Dental trauma continues to cause loss of teeth, particularly in the anterior region of the maxilla. Reimplanting the tooth with the fragment repositioned by turning it through 180 degrees presents a conservative treatment option that makes it possible to keep a tooth, at first indicated for extraction, functioning and with a satisfactory esthetic appearance.

Comparison of apical leakage between canals filled with gutta-percha/AH-Plus and the Resilon/Epiphany System, when submitted to two filling techniques.

The purpose of this study was to compare the level of apical leakage between canals filled with gutta-percha/AH-Plus (GP) and the Resilon/Epiphany System (RES), when submitted to two filling techniques. Seventy extracted teeth were instrumented and randomly divided into four experimental groups in accordance with the material and techniques used [lateral condensation and Hybrid technique (HT)] and two control groups. After 7 days in an oven (37 degrees C, 100% humidity), the teeth were immersed in India ink and cleared. Leakage was measured by the NIH imageJ program. With respect to the presence of leakage, there was no difference between the filling techniques (p > 0.05), but there was a statistically significant difference when RES was compared with GP (p < 0.05), which leaked more than RES. With RES, leakage was confined to the apical third and HT could be used to thermoplasticize RES with satisfactory results.

Methodologies for assessment of apical and coronal leakage of endodontic filling materials: a critical review.

Apical leakage continues to be a topic of great interest, because in spite of the advances in Endodontics, clinical failures still occur. Most failures are probably attributed to the proliferation of bacteria that remain viable after chemical-mechanical preparation and cause periapical tissue irritation. Coronal leakage has aroused researchers' interest over the last few years, since canals may be re-contaminated after loss of coronal sealing or fracture of the remaining tooth. In this review, the various methodologies used for assessing root canal sealing capacity are critically analyzed, as they are not standardized, which makes it difficult to compare the results obtained when different methodologies are used, even though the same substrate is being assessed.