The aim of this paper was to report the diagnosis and evaluation of periradicular bone repair by using computed tomography and digital subtraction radiography in an endodontic surgery case treated with mineral trioxide aggregate (MTA). The patient had local swelling and fistula 7 years after trauma in the upper jaw. Periapical lesion on tooth #12 and root resorption of tooth #11 were detected radiographically. Endodontic therapy and placement of intracanal medication were carried out. After 3 months, with no improvement in the clinical signs and symptoms, computed tomography was performed, showing extensive apical bone resorption on tooth #12 and dental resorption promoting communication of the root canal with the periodontium of tooth #11. The patient was referred to endodontic surgery. After surgery and postoperative periods of 15, 30, 60, 90, and 120 days, standardized radiographs were taken, digitized, and subjected to digital subtraction of the images using Adobe Photoshop CS software. Four years later, a cone-beam computed tomography was performed, showing bone repair and absence of root resorption at tooth #11. In this clinical case, digital subtraction radiography was effective for early detection of new bone formation and evolution of repair.
The purpose of this study was to evaluate by diaphanization the cleaning ability of walls of flattened root canals prepared with three different instruments. Thirty lower incisors, which had their root canals filled with India ink after coronal access and determination of the work length, were selected. The samples were randomly divided into three groups of 10 teeth each, according to the instrument used in the preparation: Group 1 -hand files instrumentation; Group 2 -instrumentation with ProTaper Universal rotary files; Group 3 -instrumentation with iRace rotary files. After instrumentation, the teeth were diaphanized and evaluated by cleaning ability, analyzing the amount of dentin walls in which India ink was not removed. When performing the Kruskal-Wallis test (p>0.05) there were not statistical significant differences between the groups, as the arithmetic average of the scores at cervical, middle and apical thirds. None of the instruments used in root canal preparation of flattened root canals was able to perform a complete cleaning of the dentin walls.Keywords: Root Canal Preparation; Dental Pulp Cavity; Endodontics. ResumoO objetivo desse estudo foi avaliar utilizando a diafanização, a capacidade de limpeza das paredes de canais radiculares achatados preparados com três diferentes instrumentos. Foram selecionados 30 incisivos inferiores que após abertura coronária e odontometria tiveram os canais preenchidos com tinta nanquim, em seguida foram divididos aleatoriamente em três grupos de 10 dentes cada, de acordo com o instrumento utilizado no preparo: Grupo 1 -instrumentação com limas manuais; Grupo 2 -instrumentação com limas rotatórias ProTaper Universal; Grupo 3 -instrumentação com limas rotatórias iRace. Após a instrumentação, os dentes foram diafanizados e avaliados quanto a capacidade de limpeza, analisando-se a quantidade de paredes dentinárias em que a tinta nanquim não foi removida. Ao se realizar o teste de Kruskal Wallis (p>0,05) não foram observadas diferenças estatisticamente significantes entre os grupos, quanto a média aritmética dos escores nos terços cervical, médio e apical. Nenhum dos instrumentos utilizados no preparo biomecânico de canais radiculares achatados foi capaz de realizar uma completa limpeza das paredes dentinárias.
The purpose of this study was to evaluate by diaphanization the cleaning ability of walls of flattened root canals prepared with three different instruments. Thirty lower incisors, which had their root canals filled with India ink after coronal access and determination of the work length, were selected. The samples were randomly divided into three groups of 10 teeth each, according to the instrument used in the preparation: Group 1– hand files instrumentation; Group 2– instrumentation with ProTaper Universal rotary files; Group 3 – instrumentation with iRace rotary files. After instrumentation, the teeth were diaphanized and evaluated by cleaning ability, analyzing the amount of dentin walls in which India ink was not removed. When performing the Kruskal-Wallis test (p>0.05) there were not statistical significant differences between the groups, as the arithmetic average of the scores at cervical, middle and apical thirds. None of the instruments used in root canal preparation of flattened root canals was able to perform a complete cleaning of the dentin walls.
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