ABSTRACT
Objective: it was to evaluate intra- and interexaminer reliability and reproducibility of linear measurements in cone-beam tomography (CBCT) images. Materials and Methods: CBCT scans were obtained from 50 patients of a private clinic. Two examiners located the landmarks twice in two-dimensional and three-dimensional images on different days, with images performed 1 week apart. Intra- and interexaminer reproducibility and reliability were analyzed. Results: the measurement error (ME) did not show significant differences between intra- and interexaminers. The intraclass correlations (ICC) between the intra- and interexaminer readings obtained with the different methods showed almost perfect matches. The results demonstrated high examiner reproducibility for linear and volumetric parameters with high intraclass correlation coefficient (ICC) and coefficient of variation (CV). The ICC showed that the methodology was highly reliable and reproducible (ICC- >0.99 and CV <1.5%). Conclusion: the measurements demonstrated strong agreement between examiners and significant reliability and reproducibility. Therefore, this methodology can serve as a standard for linear measurement analysis of the topography of mandibular canal and osseous adjacent structures.
Subject(s)
Cone-Beam Computed Tomography/methods , Humans , Mandible/diagnostic imaging , Reproducibility of Results , Topography, MedicalABSTRACT
Objective: it was to evaluate intra- and interexaminer reliability and reproducibility of linear measurements in cone-beam tomography (CBCT) images. Materials and Methods: CBCT scans were obtained from 50 patients of a private clinic. Two examiners located the landmarks twice in two-dimensional and three-dimensional images on different days, with images performed 1 week apart. Intra- and interexaminer reproducibility and reliability were analyzed. Results: the measurement error (ME) did not show significant differences between intra- and interexaminers. The intraclass correlations (ICC) between the intra- and interexaminer readings obtained with the different methods showed almost perfect matches. The results demonstrated high examiner reproducibility for linear and volumetric parameters with high intraclass correlation coefficient (ICC) and coefficient of variation (CV). The ICC showed that the methodology was highly reliable and reproducible (ICC- >0.99 and CV <1.5%). Conclusion: the measurements demonstrated strong agreement between examiners and significant reliability and reproducibility. Therefore, this methodology can serve as a standard for linear measurement analysis of the topography of mandibular canal and osseous adjacent structures.
Subject(s)
Cone-Beam Computed Tomography/methods , Humans , Mandible/diagnostic imaging , Reproducibility of ResultsABSTRACT
O propósito desta pesquisa consistiu em realizar estudo clínico-patológico de mixomas odontogênicos arquivados noServiço de Anatomia Patológica do Departamento de Odontologia da Universidade Federal do Rio Grande do Norte. Ao todo, 14 casos de mixoma foram corados pela técnica de rotina da Hematoxilina e Eosina e examinados à microscopia de luz, descrevendo-se a presença de particularidades histopatológicas, como: áreas de intensa colagenização e remanescentesde epitélio odontogênico. Os dados clínicos referentes ao sexo e idade dos pacientes e localização anatômicadas lesões foram obtidos em requisições de biópsias arquivadas. Evidenciou-se acometimento igualitário entre os sexosmasculino e feminino. A média de idade dos pacientes ao diagnóstico foi de 33,07 anos, com o sexo masculino revelando valor médio superior (37,14 anos), em comparação com o feminino (29 anos). Em relação ao sítio anatômico, observouse predileção pela mandíbula (57,14 %), havendo maior acometimento da região posterior dos ossos gnáticos (64,29 %). Histologicamente, foram observadas áreas de intensa colagenização em meio ao estroma tumoral em 42,86% daamostra e 6 casos (42,86 %) revelavam ilhotas aparentemente inativas de epitélio odontogênico. Este estudo, apesar de concordar com os achados clínicos comumente relatados em análises retrospectivas de mixomas odontogênicos, descreve uma freqüência relativamente alta de áreas de intensa colagenização e remanescentes de epitélio odontogênico em meioà matriz extracelular destas neoplasias. Além disso, parâmetros para categorização do grau de colagenização da matriz extracelular de mixomas odontogênicos apresentam-se arbitrários e inconsistentes para classificação de mixomas efibromixomas como entidades patológicas distintas.