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https://www.readbyqxmd.com/read/27822004/the-morphometric-anatomy-of-the-delto-fulcral-triangle-a-3d-ct-based-reconstruction-study
#1
N Naidoo, L Lazarus, K S Satyapal, L De Wilde, A Van Tongel
This study introduced the new delto-fulcral triangle (DFT), the first anatomical model of its kind. As seen from the orthopaedician's supraspinatus-outlet view, the antero-superior point of the coracoid process along with the lateral- and posterior-most acromial landmarks form the boundaries of the DFT. Since these osseous scapular landmarks accounted for both dynamic and static stabilisers of the glenohumeral joint, knowledge of the anatomical features of the DFT may prove beneficial to the orthopaedic surgeon...
March 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/27718360/does-mandibular-distraction-vector-influence-airway-volumes-and-outcome
#2
Elizabeth G Zellner, Julie M Mhlaba, Russell R Reid, Derek Steinbacher
PURPOSE: The goal of mandibular distraction in the Pierre-Robin sequence is to maximally expand the oropharyngeal airway. It has been hypothesized that a steep oblique distraction vector might allow greater airway enlargement compared with horizontal distraction. This study compared vector orientation in relation to airway volume and overall clinical outcome. MATERIALS AND METHODS: Micrognathic infants who underwent mandibular distraction with sufficient computed tomographic data were retrospectively reviewed...
September 13, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27563623/crouzon-syndrome-virtual-planning-of-surgical-treatment-by-application-of-internal-distractors
#3
Chingiz Rahimov, Ruslan Asadov, Gunel Hajiyeva, Nazim Verdiyev, Zaur Novruzov, Ismayil Farzaliyev
Crouzon syndrome is one of the frequent pathologies within craniosynostosis syndrome. Current progress in computers and biotechnologies allows improving surgical approach and forecasting final result of reconstruction as well. We present a case of successful surgical treatment of Crouzon syndrome, done by application of virtual planning allowing determining "monobloc" features, type of reconstruction and distraction protocol as well. A 20-year-old female had presented with craniofacial deformity. Clinical and radiological investigation revealed Crouzon syndrome...
January 2016: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/27506462/impact-of-three-dimensional-printed-pelvicaliceal-system-models-on-residents-understanding-of-pelvicaliceal-system-anatomy-before-percutaneous-nephrolithotripsy-surgery-a-pilot-study
#4
Hasan Anıl Atalay, Volkan Ülker, İlter Alkan, Halil Lütfi Canat, Ünsal Özkuvancı, Fatih Altunrende
OBJECTIVE: To investigate the impact of three-dimensional (3D) printed pelvicaliceal system models on residents' understanding of pelvicaliceal system anatomy before percutaneous nephrolithotripsy (PCNL). MATERIALS AND METHODS: Patients with unilateral complex renal stones indicating PCNL were selected. Usable data of patients were obtained from CT-scans in Digital Imaging and Communications in Medicine (DICOM) format. Mimics software version 16.0 (Materialise, Belgium) was used for segmentation and extraction of pelvicaliceal systems (PCSs)...
October 2016: Journal of Endourology
https://www.readbyqxmd.com/read/27476365/biomechanical-effects-of-maxillary-expansion-on-a-patient-with-cleft-palate-a-finite-element-analysis
#5
Haofu Lee, Alan Nguyen, Christine Hong, Paul Hoang, John Pham, Kang Ting
INTRODUCTION: The aims of this study were to evaluate the effects of rapid palatal expansion on the craniofacial skeleton of a patient with unilateral cleft lip and palate (UCLP) and to predict the points of force application for optimal expansion using a 3-dimensional finite element model. METHODS: A 3-dimensional finite element model of the craniofacial complex with UCLP was generated from spiral computed tomographic scans with imaging software (Mimics, version 13...
August 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27270544/accuracy-assessment-of-three-dimensional-surface-reconstructions-of-in-vivo-teeth-from-cone-beam-computed-tomography
#6
Yan-Hui Sang, Hong-Cheng Hu, Song-He Lu, Yu-Wei Wu, Wei-Ran Li, Zhi-Hui Tang
BACKGROUND: The accuracy of three-dimensional (3D) reconstructions from cone-beam computed tomography (CBCT) has been particularly important in dentistry, which will affect the effectiveness of diagnosis, treatment plan, and outcome in clinical practice. The aims of this study were to assess the linear, volumetric, and geometric accuracy of 3D reconstructions from CBCT and to investigate the influence of voxel size and CBCT system on the reconstructions results. METHODS: Fifty teeth from 18 orthodontic patients were assigned to three groups as NewTom VG 0...
June 20, 2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27170842/a-systematic-review-of-image-segmentation-methodology-used-in-the-additive-manufacture-of-patient-specific-3d-printed-models-of-the-cardiovascular-system
#7
N Byrne, M Velasco Forte, A Tandon, I Valverde, T Hussain
BACKGROUND: Shortcomings in existing methods of image segmentation preclude the widespread adoption of patient-specific 3D printing as a routine decision-making tool in the care of those with congenital heart disease. We sought to determine the range of cardiovascular segmentation methods and how long each of these methods takes. METHODS: A systematic review of literature was undertaken. Medical imaging modality, segmentation methods, segmentation time, segmentation descriptive quality (SDQ) and segmentation software were recorded...
January 2016: JRSM Cardiovascular Disease
https://www.readbyqxmd.com/read/27007950/endocranial-morphology-of-the-primitive-nodosaurid-dinosaur-pawpawsaurus-campbelli-from-the-early-cretaceous-of-north-america
#8
Ariana Paulina-Carabajal, Yuong-Nam Lee, Louis L Jacobs
BACKGROUND: Ankylosaurs are one of the least explored clades of dinosaurs regarding endocranial anatomy, with few available descriptions of braincase anatomy and even less information on brain and inner ear morphologies. The main goal of this study is to provide a detailed description of the braincase and internal structures of the Early Cretaceous nodosaurid Pawpawsaurus campbelli, based on recently made CT scans. METHODOLOGY/PRINCIPAL FINDINGS: The skull of Pawpawsaurus was CT scanned at University of Texas at Austin (UTCT)...
2016: PloS One
https://www.readbyqxmd.com/read/26949129/correlation-between-hyoid-bone-position-and-airway-dimensions-in-chinese-adolescents-by-cone-beam-computed-tomography-analysis
#9
Y-Y Jiang
This study aimed to investigate the correlation between upper airway dimensions and hyoid bone position in Chinese adolescents based on cone beam computed tomography (CBCT) images. CBCT images from a total of 254 study subjects were included. The upper airway and hyoid bone parameters were measured by Materialism's interactive medical image control system (MIMICS) v.16.01 (Materialise, Leuven, Belgium). The airway dimensions were evaluated in terms of volume, cross-sectional area (CSA), mean CSA, length, anteroposterior dimension of the cross-section (AP), lateral dimension of the cross-section (LAT), and LAT/AP ratio...
July 2016: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/26913140/finite-element-modelling-of-the-femur-bone-of-a-subject-suffering-from-motor-neuron-lesion-subjected-to-electrical-stimulation
#10
Magnus K Gislason, Páll Ingvarsson, Paolo Gargiulo, Stefán Yngvason, Vilborg Guðmundsdóttir, Sigrún Knútsdóttir, Þórður Helgason
Bone loss and a decrease in bone mineral density is frequently seen in patients with motor neuron lesion due to lack of mechanical stimulation. This causes weakening of the bones and a greater risk of fracture. By using functional electrical stimulation it is possible to activate muscles in the body to produce the necessary muscle force to stimulate muscle growth and potentially decrease the rate of bone loss. A longitudinal study was carried out on a single patient undergoing electrical stimulation over a 6 year period...
September 23, 2014: European Journal of Translational Myology
https://www.readbyqxmd.com/read/26855859/the-feasibility-and-radiological-features-of-sacral-alar-iliac-fixation-in-an-adult-population-a-3d-imaging-study
#11
Ai-Min Wu, Yong-Long Chi, Wen-Fei Ni, Yi-Xing Huang
BACKGROUND: Surgical treatments for adult spinal deformities often include pelvic fixation, and the feasibility of sacral-2 alar iliac (S2AI) screw fixation has been shown previously. However, sometimes S2AI screw fixation cannot be applied due to the presence of an osteolytic lesion or trauma or because the biomechanical properties of only an S2AI screw is insufficient. Therefore, we questioned the feasibility of using sacral AI screws in other segments and determined whether S3AI and S4AI screws have the potential to be used for sacral fractures...
2016: PeerJ
https://www.readbyqxmd.com/read/26827979/evaluation-of-facial-hard-and-soft-tissue-asymmetry-using-cone-beam-computed-tomography
#12
COMPARATIVE STUDY
Rahime Burcu Nur, Derya Germeç Çakan, Tülin Arun
INTRODUCTION: The purposes of this study were to (1) evaluate facial asymmetry 3 dimensionally using cone-beam computed tomography (CBCT) and (2) compare the right and left facial hard and soft tissues volumetrically and their interferences on each other. METHODS: The CBCT data of 49 asymmetric (soft tissue menton deviation, ≥4 mm; distance from the facial midline) (mean age, 19.9 ± 5.6 years) and 39 symmetric patients (soft tissue menton deviation, <4 mm) (mean age, 17...
February 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/26788498/a-new-measurement-technique-of-the-characteristics-of-nutrient-artery-canals-in-tibias-using-materialise-s-interactive-medical-image-control-system-software
#13
Jiantao Li, Hao Zhang, Peng Yin, Xiuyun Su, Zhe Zhao, Jianfeng Zhou, Chen Li, Zhirui Li, Lihai Zhang, Peifu Tang
We established a novel measurement technique to evaluate the anatomic information of nutrient artery canals using Mimics (Materialise's Interactive Medical Image Control System) software, which will provide full knowledge of nutrient artery canals to assist in the diagnosis of longitudinal fractures of tibia and choosing an optimal therapy. Here we collected Digital Imaging and Communications in Medicine (DICOM) format of 199 patients hospitalized in our hospital. All three-dimensional models of tibia in Mimics were reconstructed...
2015: BioMed Research International
https://www.readbyqxmd.com/read/26558322/study-of-contact-characteristics-between-a-respirator-and-a-headform
#14
Mang Cai, Shengnan Shen, Hui Li, Xiaotie Zhang, Yanzhao Ma
This article presents a computational study on contact characteristics of contact pressure and resultant deformation between an N95 filtering facepiece respirator and a newly developed digital headform. The geometry of the headform model is obtained based on computed tomography scanning of a volunteer. The segmentation and reconstruction of the headform model is performed by Mimics v16.0 (Materialise, Leuven, Belgium), which is a medical image processing software. The respirator model is obtained by scanning the surface of a 3M 8210 N95 respirator using a 3D digitizer and then the model is transformed by Geomagic Studio v12...
2016: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/26545217/the-lumbar-artery-perforator-flap-3-dimensional-anatomical-study-and-clinical-applications
#15
Mary Beth Bissell, David T Greenspun, Josh Levine, William Rahal, Ammar Al-Dhamin, Ali AlKhawaji, Steven F Morris
BACKGROUND: The lumbar region is a potential donor site for perforator-based rotational or free flaps or as a recipient site for free flaps to obtain coverage for deficits in the sacral region. Because of the lack of consensus regarding the microvascular anatomy of this potential flap site, a robust investigation of the anatomy of this region is required. METHODS: Three-dimensional reconstructions (n = 6) of the microvasculature of the lumbar region were generated using MIMICS software (Materialise, Belgium) for each of the four paired lumbar vessels...
October 2016: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/26423682/a-computer-aided-measurement-method-for-unstable-pelvic-fractures-based-on-standardized-radiographs
#16
Jing-Xin Zhao, Zhe Zhao, Li-Cheng Zhang, Xiu-Yun Su, Hai-Long Du, Li-Ning Zhang, Li-Hai Zhang, Pei-Fu Tang
BACKGROUND: To set up a method for measuring radiographic displacement of unstable pelvic ring fractures based on standardized X-ray images and then test its reliability and validity using a software-based measurement technique. METHODS: Twenty-five patients that were diagnosed as AO/OTA type B or C pelvic fractures with unilateral pelvis fractured and dislocated were eligible for inclusion by a review of medical records in our clinical centre. Based on the input pelvic preoperative CT data, the standardized X-ray images, including inlet, outlet, and anterior-posterior (AP) radiographs, were simulated using Armira software (Visage Imaging GmbH, Berlin, Germany)...
September 30, 2015: BMC Medical Imaging
https://www.readbyqxmd.com/read/26339820/segmentation-and-surface-reconstruction-of-a-cadaver-heart-on-mimics-software
#17
D S Shin, S Lee, H S Park, S-B Lee, M S Chung
The Visible Korean research team used Mimics software (Materialise, Leuven, Belgium) for the segmentation and subsequent surface reconstruction of heart structures using information obtained from sectioned images of a cadaver. Twenty-six heart components were outlined in advance on Photoshop (Adobe Systems, San Jose, CA, USA). By use of the Mimics, the outlined images were then browsed along with the vertical planes as well as the 3-dimensional surface models, which were immediately built by piling the images...
2015: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/26267849/volumetric-nasal-cavity-analysis-in-children-with-unilateral-and-bilateral-cleft-lip-and-palate
#18
Zainab Farzal, Jonathan Walsh, Gabriella Lopes de Rezende Barbosa, Carlton J Zdanski, Stephanie D Davis, Richard Superfine, Luiz A Pimenta, Julia S Kimbell, Amelia Fischer Drake
OBJECTIVES/HYPOTHESIS: Children with cleft lip and palate (CLP) often suffer from nasal obstruction that may be related to effects on nasal volume. The objective of this study was to compare side:side volume ratios and nasal volume in patients with unilateral (UCLP) and bilateral (BCLP) clefts with age-matched controls. STUDY DESIGN: Retrospective case-control study using three-dimensional (3D) nasal airway reconstructions. METHODS: We analyzed 20 subjects (age range = 7-12 years) with UCLP and BCLP from a regional craniofacial center who underwent cone beam computed tomography (CT) prior to alveolar grafting...
June 2016: Laryngoscope
https://www.readbyqxmd.com/read/26208225/usefulness-of-3-dimensional-measurement-of-ossification-of-the-posterior-longitudinal-ligament-opll-in-patients-with-opll-induced-myelopathy
#19
Nam Lee, Gyu Yeul Ji, Hyun Chul Shin, Yoon Ha, Jong Wuk Jang, Dong Ah Shin
STUDY DESIGN: Retrospective study. OBJECTIVE: To evaluate the usefulness of 3-dimensional (3D) measurement of ossification of the posterior longitudinal ligament (OPLL), and identify the reliability of a novel 3D method of measurement. SUMMARY OF BACKGROUND DATA: OPLL is not a 2-dimensional (2D) disease, but rather a 3D disease. Therefore, conventional measurement of parameters using radiography may not be suitable for evaluating OPLL. However, there is no study that investigated the correlation between 3D parameters of OPLL and clinical outcomes...
October 1, 2015: Spine
https://www.readbyqxmd.com/read/26152559/influence-of-maxillary-advancement-surgery-on-skeletal-and-soft-tissue-changes-in-the-nose-a-retrospective-cone-beam-computed-tomography-study
#20
Andreas F Hellak, Bernhard Kirsten, Michael Schauseil, Rolf Davids, Wolfgang M Kater, Heike M Korbmacher-Steiner
OBJECTIVES: Surgical correction of skeletal maxillary retroposition is often associated with changes in the morphology of the nose. Unwanted alar flaring of the nose is observed in many cases. The aim of the present study was therefore to investigate the influence of surgical advancement of the maxilla on changes in the soft-tissue morphology of the nose. Having a coefficient that allows prediction of change in the nasal width in Caucasian patients after surgery would be helpful for treatment planning...
July 9, 2015: Head & Face Medicine
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