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INTRODUCTION: The aim of this study was to determine the frequency and risk factors of maxillary sinusitis of endodontic origin (MSEO) on posterior maxillary teeth evaluated using dynamic navigation and a novel filter of cone-beam computed tomographic (CBCT) imaging. METHODS: CBCT scans of 453 patients (814 teeth) were selected. Data were divided into 4 groups: (1) root canal treatment (RCT), (2) relation of the root apex to the maxillary sinus, (3) apical periodontitis (AP), and (4) maxillary sinus inflammation (no inflammation, periapical osteoperiostitis, periapical mucositis, partial obstruction, or total obstruction). Frequency distribution and cross-tabulation were used for data analysis. The association of maxillary sinus abnormalities with other variables was analyzed using the chi-square test. The significance level was set at 5%, and the association between dependent and independent variables was analyzed using robust Poisson regression models. RESULTS: MSEO was found in 65.6% of the cases, and the highest frequency rates were in the periapical mucositis (44%) and partial obstruction (15.8%) groups. The rates of risk factors were highest in the cases of RCT (54.9%), AP (34.3%), and the root apex in contact with the maxillary sinus (53.8%). The most frequent sex and age group were female (55.8%) and 41-50 years (30.5%). CONCLUSIONS: The frequency of MSEO was high and positively associated with RCT, AP, and the root apex's position in contact with the floor of the maxillary sinus. The maxillary sinus filter of the CBCT software provides a clear image of maxillary sinus abnormalities.

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OBJECTIVES: The diagnosis of root fractures by conventional radiographs is still difficult because of limitations of 2D images. Cone-beam volumetric tomography improves the diagnosis capacity in dentistry, such as increased radiation dose to the patient and presence of artifacts on the image. STUDY DESIGN: This study compared the images obtained on conventional periapical radiographs and 3D scans (Accuitomo 3DX) for the diagnosis of root fractures. Twenty patients with suspected root fractures were submitted to examination by periapical radiography and CBCT. Two professionals, unaware of the symptomatology, examined these radiographs and CBCT images according to pre-established scores, which were later checked against the signs and symptoms. RESULTS: The results revealed statistical difference for cone-beam volumetric tomography compared with conventional radiographs in the diagnosis of root fractures. CONCLUSION: It could be concluded that cone-beam volumetric tomography was better than conventional radiography in the diagnosis of root fractures, thereby constituting an excellent alternative for diagnosis in general practice.

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Uma das descobertas responsáveis pela revolução mundial é a informática. A aplicação dos benefícios nos distintos setores da saúde permitiu expressivo auxílio no diagnóstico, na terapêutica, na ciência, economia de tempo, além de influenciar a qualidade de vida. A biotecnologia continua revolucionando o pensamento atual. As imagens interpretadas pelas radiografias em apenas dois planos, desde sua descoberta por Rõntgen em 1895, atravessaram quase um século. Hoje a tomografia computadorizada Cone Beam (CBCT) permite uma visualização de uma imagem tridimensional, em que um novo plano é adicionado: a profundidade. Sua aplicação clínica, com elevada acurácia, se direciona a quase todas as áreas da Odontologia - Cirurgia, Implantodontia, Ortodontia, Endodontia, Periodontia, Distúrbio Temporomandibular e Diagnóstico por Imagens. A visão real da associação destes indicadores aos aspectos clínicos projeta a quarta dimensão, marcada pela necessidade de tempo e espaço. Assim, estudou-se a revolução da Odontologia a partir da CBCT.

One of the responsible founds for the world revolution is the informatics. The application of the benefits in different sectors of health allowed expressive aid of diagnosis, therapeutic, science, economy of time, besides influencing in life quality. A biotechnology continues revolutionizing the current thought. The images interpreted by the x-rays in only two plans, since their discovery for Rõntgen in 1895, they almost crossed one century. Today, the tomography computerized Cone Beam allows a visualization of a three-dimensional image, where a new plan is added, the depth. Its clinical application, with high accuracy, directed to all of the areas of the Dentistry - Surgery, Implantodontology, Orthodontics, Endodontics, Periodontology, Temporomandibular Joint (TMJ) Dysfunctions and Diagnosis for Images. The real vision of the association of these indicators to the clinical aspects, projects the fourth dimension, marked by the need of time and space. Therefore, the objective of this paper was to study the revolution of the dental practice starting from the Cone Beam computed tomography.

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