Evaluation of Root Perforation Treatments with Mineral Trioxide Aggregate: A Retrospective Case Series Study.

This study aimed to evaluate the long-term clinical success of the use of mineral trioxide aggregate (MTA) as a sealant material in root perforation treatments. Therefore, the dental records of 53 patients were analyzed, and treatment data was collected (age, gender, tooth location, jaw, presence or absence of radiolucent lesion, fallow up time and final radiographic/clinical assessment). All procedures were performed by a single specialist. Two examiners analyzed three radiographs from the records of each patient and classified the treatments as successful or unsuccessful. Data was analyzed statistically using parametric chi-square (P≤0.05). The examiners classified 69.8% of the cases as successful, with a follow-up time of 1-16.25 years (average: 6 years). The presence of initial radiolucent lesion was observed in 79.2% of the teeth, with a higher index of treatment in maxillary teeth (62.3%). However, the majority of successful cases were located in the maxilla (73.0%), while most unsuccessful ones were located in the mandible (62.5%) (P=0.014). There was no statistically significant difference regarding presence of previous lesions in successful (75.7%) and unsuccessful cases (87.5%) (P=0.330). In the present study, root perforations sealed with MTA had a success rate of 69.8% within 1-16.25 years. The presence of initial injury did not influence the prognosis, and maxillary teeth presented a higher success rate.

Transmigração de caninos mandibulares: relato de dois casos clínicos / Transmigration of mandibular canines: a review of the literature and report of two cases

A transmigração do canino mandibular é uma condição raramente encontrada. Quando diagnosticado, por exames clínico e radiográfico, faz-se necessária uma avaliação criteriosa para o estabelecimento do tratamento mais adequado. O objetivo deste artigo é a apresentação de dois casos clínicos demonstrando seus aspectos clínicos, radiográficos e tratamento instituído.

Associação dos diferentes graus de reabsorção radicular com fatores predisponentes etilógicos / Association of several degrees of root resorption with etiological-predisposing factors

As reabsorções radiculares apicais externas têm sido reconhecidas como seqüela do tratamento ortodôntico, tratando-se de um processo biológico de etiologia multifatorial. Em Ortodontia, vários fatores são atribuídos à sua etiologia como genética, susceptibilidade individual, comprimento e desenvolvimento radicular, fatores endócrinos e hormonais, idade, gênero, assim como o tempo e o tipo de terapia ortodôntica. Foram analisadas radiografias periapicais de 32 pacientes com tratamento ortodôntico concluído na Clínica de Especialização em Ortodontia da Faculdade de Odontologia da Universidade Federal de Juiz de Fora, correlacionando o grau de reabsorção radicular nos incisivos centrais e laterais superiores após a conclusão do tratamento, com os fatores sexo, gênero, duração e tipo (com ou sem extração dentária] de terapia ortodôntica. O grau de reabsorção foi avaliado através da diferença entre as radiografias pré e pós-tratamento ortodôntico em incisivos superiores e os resultados foram submetidos à análise estatística. Concluiu-se que os incisivos centrais superiores são os elementos dentários mais acometidos pelo processo reabsortivo e que o grau de reabsorção radicular está diretamente relacionado à idade do paciente.

The external apical root resorption has been recognized as sequel of the orthodontic treatment, being its etiology a multifactorial biological process. In Orthodontics, some factors are attributed to its etiology as genetic, individual susceptibility, endocrine and hormonal factors, length and radicular development, age, gender, as well as the time and the type of orthodontic therapy. Periapical x-rays of 32 patients with orthodontic treatment concluded in the Orthodontic clinic at Dentistry School of the Juiz de Fora Federal University had been analyzed, correlating the root resorption degree level in the superior central and lateral incisors after treatment concluded, with the factors: gender, duration and type (with or without dental extraction] of orthodontic therapy. The resorption degree was evaluated through the difference between the x-rays of the superior incisors taken on pre and post-orthodontic treatment being the results submitted to statistical analysis. It was concluded that the superior central incisors are more attack by the root resorption, being this process directly related to the age of the patient.