Navegando por Assunto "Tomografia computadorizada de feixe cônico"

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Acesso aberto (Open Access)
Analysis of the mental foramen using cone beam computerized tomography
(Universidade Federal do Pará, 2015-08) SAITO, Kunihiro; ARAÚJO, Ney Soares de; SAITO, Miki Taketomi; PINHEIRO, João de Jesus Viana; CARVALHO, Pedro Luiz de
Introduction: Knowledge of the anatomical structures located in the region between the mental foramina is of critical importance in pre-operative planning. Objective: To evaluate the position of the mental foramen relative to the apices of the teeth and the distance to the edges of the mandible, using cone beam computerized tomography. Material and method: One hundred cone beam computerized tomographs of the mandible were evaluated; the tomographs were taken using a single tomographic device. Each image chosen was evaluated repeatedly from both sides of the mandible, the position of the mental foramen, indicating the region in which the foramen was found and the measures of the mental foramen, the lingual cortex and the mandibular base. Initially, the data were analyzed descriptively. A value of p<0.05 was chosen as the level of significance. Result: Forty-two percent of the mental foramina were located in the apex of the second pre-molar. The lingual margin of the mental foramen was located, on average, 3.1mm from the lingual cortex. The lower margin of the mental foramen was located 7.25 mm above the lower edge of the mandible. Conclusion: The mental foramen was located more frequently at a level of the apices of the second pre-molars, with a distance to the lingual cortex, on average, of 3.1mm and to the base of the mandible, on average, of 7.25 mm.
Acesso aberto (Open Access)
Comparação do planejamento em implantodontia por radiografia panorâmica e tomografia computadorizada de feixe cônico
(São Leopoldo Mandic, 2017-03-09) ANDRADE, Wagner Almeida de; JUNQUEIRA, José Luiz Cintra
The aim of this research was to evaluate the intra-examiner agreement in the planning of implant planning with panoramic radiography and cone beam computed tomography (CBCT). The research was a retrospective study of the 34 patients, in which panoramic radiography and CBCT were evaluated. The sample used in this study was 76 edentulous sites, with one or multiple spaces in different regions of the jaws, which performed the installation of implants. Inclusion criteria were patients attend in the period from 2013 to 2015, with panoramic radiography and CBCT, with the clinical planning, and discussed between students and teachers before the surgical procedure. The follow up of the patients who did not attend the inclusion were excluded. The radiographic and tomographic planning was compared with clinical planing. The experts answered a questionnaire with the indication of the area to be planned and type of implant, according to an interactive catalog. The data were analyzed in a descriptive statistic, and the intraclass correlation coefficient (ICC) was applied to evaluate the similarity between the measurements of the width and length of the implants by the computerized planning and the initial planning. The level of significance was 5%. The results showed that in the radiographic planning, the evaluation of the reproducibility using the CCI, the observed values were considered from average to good in the posterior maxillary. In tomographic planning, the anterior maxillary height coincided with the initial surgical planning; In the evaluation of the plans of the posterior maxillary and height of the posterior mandible, the CCI found were considered satisfactory. It was concluded that there were intra-examiner disagreements in the planning of the initial and tomographic implants. Cone beam computed tomography should be used in implant planning.