Results: 74

Uso da estereofotogrametria para mensuração do volume da anatomia externa da face: revisão sistemática

Rev. bras. cir. plást; 33 (4), 2018
Introdução: O registro fotográfico tem sido importante para diversas especialidades médicas como a Cirurgia Plástica. A fotografia em duas dimensões apresenta limitações para capturar profundidade e volume de estruturas outros instrumentos para avaliar essa alteração. Diversas tecnologias foram...

Use of micro-computed tomography for bone evaluation in dentistry

Braz. dent. j; 29 (3), 2018
Abstract Micro computed tomography (µCT) follows the same principle of computed-tomography used for patients, however providing higher-resolution. Using a non-destructive approach, samples can be scanned, and each section obtained is used to build a volume using tridimensional reconstruction. For bone a...

Uso de digitalizador e impressora doméstica em 3 dimensões em rinoplastia

Rev. bras. cir. plást; 33 (1), 2018
Os princípios para uma rinoplastia bem-sucedida incluem consulta e planejamento pré-operatório e uma análise clínica abrangente que defina as metas da cirurgia. Mais recentemente, a digitalização e a impressão doméstica em 3 dimensões tornaram-se disponíveis. O objetivo deste estudo é descrev...

Segmentation methods for micro ct images: a comparative study using human bone samples

Braz. dent. j; 29 (2), 2018
Abstract X-ray microtomography (microCT) is a nondestructive technique used to assess bone morphometry. For an accurate analysis, it is necessary to segment the bone tissue from the background images, avoiding under- or overestimation of the real bone volume. Thus, segmentation methods for microCT can in...

3-H in 3-D: envisaging beyond the current hype, the hope and hurdles of three-dimensional "virtual planning" in orthognathic surgery

Int. j. morphol; 36 (1), 2018
SUMMARY: Recent technical and technological advancements in orthognathic surgery concepts, intricate in the diagnosis and treatment planning for corrections of dento-facial deformities, have achieved stable oro-dental functional occlusion and facial esthetic harmony. Undeniably, this can be attributed to...

Diagnóstico, planificación del tratamiento y endodoncia de un primer premolar inferior con dos canales mediante tomografía computarizada 3D: reporte de un caso

J. oral res. (Impresa); 7 (9), 2018
El tratamiento endodóntico debe considerar que los dientes presentan una morfología del sistema de canales radiculares con alta variabilidad y complejidad. por lo tanto, el conocimiento acabado de la anatomía radicular y la planificación del procedimiento utilizando sistemas imagenológicos previos a...

Clinical application of atlantoaxial pedicle screw placement assisted by a modified 3D-printed navigation template

Clinics; 73 (), 2018
OBJECTIVES: To investigate the primary clinical value of atlantoaxial pedicle screw placement assisted by a modified 3D-printed navigation template. METHODS: We retrospectively analyzed the cases of 17 patients treated from June 2015 to September 2016 with atlantoaxial pedicle screw placement assisted b...

3-D finite element analysis of the effects of post location and loading location on stress distribution in root canals of the mandibular 1st molar

J. appl. oral sci; 26 (), 2018
Abstract Objective The purpose of this study was to evaluate, by using finite element analysis, the influence of post location and occlusal loading location on the stress distribution pattern inside the root canals of the mandibular 1st molar. Material and Methods Three different 3-D models of the ma...

Volumetric reconstruction and determination of minimum crosssectional area of the pharynx in patients with cleft lip and palate: comparison between two different softwares

J. appl. oral sci; 26 (), 2018
Abstract Objective: The aim of this study was to assess the accuracy of volumetric reconstruction of the pharynx by comparing the volume and minimum crosssectional area (mCSA) determined with open-source applications (ITK-Snap, www.itksnap.org ; SlicerCMF) and commercial software (Dolphin3D, 11.8, Dolph...

Comparison of automatic and visual methods used for image segmentation in Endodontics: a microCT study

J. appl. oral sci; 25 (6), 2017
Abstract To calculate root canal volume and surface area in microCT images, an image segmentation by selecting threshold values is required, which can be determined by visual or automatic methods. Visual determination is influenced by the operator's visual acuity, while the automatic method is done entir...