RESUMEN
ABSTRACT Liver transplantation is the treatment of choice for end-stage liver disease patients, and offers them the possibility of returning to active and longer life. A dental evaluation before transplantation is a recommended prerequisite to avoid oral infections, which can worsen the patient's overall situation. This case report refers to the root fracture of an anterior tooth in a patient who was undergoing dental treatment prior to liver transplantation. On clinical examination, the maxillary right central incisor (11) presented without color change, but with mobility in the buccolingual direction, slight flaring and extrusion, and fistula in the attached gingiva on the distal side of tooth 11. The patient reported that he had suffered a trauma in that region 30 years before. The radiographic examination showed a horizontal fracture of the middle third of the root, associated with bone damage, indicated by a radiolucent area at the distal surface of 11. The proposed treatment consisted of: scraping procedure and straightening of the distal surface, radical endodontic treatment of the coronal portion of the root, subsequent filling with Mineral Trioxide Aggregate and dental immobilization. The clinical and radiographic follow-up at three-monthly intervals allowed us to observe gradual regression of the lesion with bone formation, contributing to maintenance of the patient's general and emotional health, preserving his smile and quality of life.
RESUMO O transplante de fígado é o tratamento de escolha para o estágio final da doença hepática e oferece a possibilidade ao paciente de retorno a uma vida ativa e longa. Uma avaliação dentária antes do transplante é recomendada como pre-requisito para a eliminação de infecções orais, as quais podem piorar o quadro do paciente. Este relato de caso se refere a uma fratura radicular de dente anterior em um paciente em tratamento odontológico prévio ao transplante de fígado. No exame clínico, o incisivo central superior direito (11) apresentava-se sem alteração na coloração mas com mobilidade no sentido vestíbulo-lingual, ligeira vestibularização e extrusão, e fístula na gengiva inserida na distal do 11. O paciente relatou ter sofrido traumatismo na região há mais de 30 anos. Ao exame radiográfico, foi identificada uma linha de fratura radicular horizontal no terço médio, associada à lesão óssea indicada por uma área radiolúcida na superfície distal do 11. O tratamento proposto para o caso envolveu procedimentos de raspagem e alisamento subgengival da superfície distal, o tratamento endodôntico radical da porção coronária radicular com posterior obturação com Agregado Trióxido Mineral e imobilização dental. O acompanhamento clínico e radiográfico, em intervalos de três meses, permitiu observar a regressão gradual da lesão, com formação de osso no local, contribuindo para manutenção do quadro de saúde geral e emocional do paciente, preservando seu sorriso e sua qualidade de vida.
RESUMEN
The objective of this study was to determine the ecological relationships between bacterial species that colonize infected root canals. Root canal bacteria recovered from one patient with pulp canal necrosis were evaluated in vitro for synergistic and antagonistic activities determined by mono and co-culture growth kinetics and the production of bacteriocin-like substances using the double layer diffusion method. Peptostreptococcus prevotii triggered a significant increase of Fusobacterium nucleatum growth, while the former bacteria did not affect the growth of P. prevotii. The bacterial species did not produce antagonism activity against itself or against any of the other two species. Despite many studies have demonstrated the capability of root canal microorganisms to produce antagonistic substances, these in vitro experimental tests show the synergistic effect of P. prevotii on the growth of F. nucleatum.