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https://www.readbyqxmd.com/read/29759906/determining-glenoid-component-version-after-total-shoulder-arthroplasty
#1
Manish P Mehta, Laura A Vogel, Brian B Shiu, Elizabeth R Dennis, Djuro Petkovic, William N Levine, Charles M Jobin
BACKGROUND: Glenoid component loosening after total shoulder arthroplasty (TSA) may occur if retroversion is not corrected to <10°. However, accurately measuring postoperative glenoid component version has been difficult without postoperative computed tomography (CT), adding cost and radiation exposure outside of the standard radiographic follow-up. We present a new method to assess glenoid component version after TSA using only routine preoperative CT and postoperative radiographs (x-rays)...
May 11, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29716401/clinical-accuracy-of-a-patient-specific-femoral-osteotomy-guide-in-minimally-invasive-posterior-hip-arthroplasty
#2
Adrian K Schneider, Jim W Pierrepont, Gabrielle Hawdon, Stephen McMahon
INTRODUCTION: Patient specific guides can be a valuable tool in improving the precision of planned femoral neck osteotomies, especially in minimally invasive hip surgery, where bony landmarks are often inaccessible. The aim of our study was to validate the accuracy of a novel patient specific femoral osteotomy guide for THR through a minimally invasive posterior approach, the direct superior approach (DSA). METHODS: As part of our routine preoperative planning 30 patients underwent low dose CT scans of their arthritic hip...
April 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29679587/orbital-floor-reconstruction-3-dimensional-analysis-shows-comparable-morphology-of-scapular-and-iliac-crest-bone-grafts
#3
Joel C Davies, Harley H L Chan, Jonathan M Bernstein, David P Goldstein, Jonathan C Irish, Ralph W Gilbert
PURPOSE: Current nonvascular osseous reconstructive options for reconstruction of the orbital floor after maxillectomy include options such as scapular tip and iliac crest bone grafts. The aim of this study was to determine whether these donor sites were morphologically comparable with the orbital floor. MATERIALS AND METHODS: A retrospective cross-sectional study design was selected. By use of a pre-existing melanoma database (January 1, 2005, through September 20, 2015), computed tomography scans of the head, neck, thorax, and pelvis were obtained from patients without evidence of bony metastases...
March 28, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29607159/application-of-3d-printing-in-the-surgical-planning-of-hypertrophic-obstructive-cardiomyopathy-and-physician-patient-communication-a-preliminary-study
#4
Hong-Chang Guo, Yang Wang, Jiang Dai, Chang-Wei Ren, Jin-Hua Li, Yong-Qiang Lai
Background: The aim of this study was to evaluate the effect of 3-dimensional (3D) printing in treatment of hypertrophic obstructive cardiomyopathy (HOCM) and its roles in doctor-patient communication. Methods: 3D-printed models were constructed preoperatively and postoperatively in seven HOCM patients received surgical treatment. Based on multi-slice computed tomography (CT) images, regions of disorder were segmented using the Mimics 19.0 software (Materialise, Leuven, Belgium)...
February 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29549022/landmark-independent-method-to-determine-midsagittal-plane-and-its-clinical-application-in-craniomaxillofacial-trauma
#5
Xiaotian Lian, Jun Guo, Wei Zeng, Hai Qing, Rui Ju, Wei Tang
PURPOSE: The purpose of this study was to explore new landmark-independent methods suitable for determining the midsagittal plane (MSP) in patients with craniomaxillofacial trauma and its clinical application. MATERIALS AND METHODS: Preoperative spiral computed tomography data of 25 patients with craniomaxillofacial trauma were imported into Mimics software (Materialise, Leuven, Belgium) to reconstruct 3-dimensional skull models. In the experimental group, the MSP was determined by different landmarks that were clear, were scattered, and did not have displacement according to the types of fractures...
February 20, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29549019/how-does-the-remodeling-capacity-of-children-affect-the-morphologic-changes-of-fractured-mandibular-condylar-processes-after-conservative-treatment
#6
Shiping Chang, Yan Yang, Yang Liu, Jingfu Wang, Wuyang Zhang, Qin Ma
PURPOSE: Our aim was to explore how the remodeling capacity of children's mandibular condyles affected the morphologic changes of fractured condyles after conservative treatment. PATIENTS AND METHODS: A retrospective study was designed and performed in children and adult patients with mandibular condylar fractures. Computed tomographic imaging was reviewed for all patients to analyze the morphologic changes and risk factors for traumatic temporomandibular joint ankylosis...
February 19, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29526640/effect-of-posterior-instrumented-fusion-on-three-dimensional-volumetric-growth-of-cervical-ossification-of-the-posterior-longitudinal-ligament-a-multiple-regression-analysis
#7
Jong Joo Lee, Dong Ah Shin, Seong Yi, Keung Nyun Kim, Do Heum Yoon, Hyun Chul Shin, Yoon Ha
BACKGROUND CONTEXT: Despite the fact that ossification of posterior longitudinal ligament (OPLL) is a three-dimensional disease, conventional studies have mainly focused on a two-dimensional measurement, and it is difficult to accurately determine the volume of OPLL growth and analyze the factors affecting OPLL growth after posterior decompression (laminoplasty or laminectomy and fusion). PURPOSE: This study aimed to investigate the factors affecting OPLL volume growth using a three-dimensional measurement...
March 8, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29471160/persistent-first-intersegmental-artery-pfia-visualized-by-three-dimensional-computed-tomography-angiography-in-chinese-population
#8
Haocong Zhang, Wei Chai, Shuang Wang, Yan Wang, Hongwei Li
BACKGROUND: Persistent first intersegmental artery (PFIA) is one of the most frequently vertebral artery (VA) variations. The presence of PFIA obviously increases the complexity and difficulty of vertebral lesion treatment. Thus, preoperative detection of PFIA is necessary to increase the successful rate of surgeries. We attempted to evaluate the utility value of three-dimension (3D) computed tomography angiography (CTA) for detecting PFIA in the north Chinese population. MATERIALS AND METHODS: Consecutive patients subjected to CTA between June 2012 and March 2014 were recruited from 5 clinical centers in the north of China...
April 2018: International Journal of Surgery
https://www.readbyqxmd.com/read/29465048/evaluation-of-teeth-development-in-unilateral-cleft-lip-and-palate-patients-in-mixed-dentition-by-using-medical-image-control-systems
#9
O Gezgin, M S Botsali
Objectives: The aim of this study was to evaluate the crown and root development in patients with cleft lip and palate using medical software programmes. Materials and Methods: In our study, 25 patients with mixed dentition unilateral cleft lip and palate were examined with cone-beam computed tomography (CBCT). The tomography images obtained as high resolution medical images on the computer control system (MIMICS 15.0, Materialise, Leuven, Belgium and SOLIDWORKS 2014 Premium, Concord, Massachusetts) were converted to three-dimensional volumetric images...
February 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29331571/interdepartmental-imaging-protocol-for-clinically-based-three-dimensional-computed-tomography-can-provide-accurate-measurement-of-glenoid-version
#10
Connor L Zale, Gregory I Pace, Gregory S Lewis, John Chan, H Mike Kim
BACKGROUND: Conventional computed tomography (CT) is not accurate for glenoid version measurement. This study sought to examine the feasibility of an interdepartmental protocol implemented between orthopedic surgery and radiology departments for acquisition of anatomic axial CT images and to validate the glenoid version measured through such a protocol. MATERIALS AND METHODS: Data of 30 conventional CT scans of 10 normal and 20 osteoarthritic glenoids were transferred to clinical 3-dimensional imaging software by a radiology technician trained for the study...
January 10, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29310844/modification-of-the-measurement-of-the-major-variables-in-mandibular-condylar-fractures-angulation-of-sidewards-displacement-and-shortening-of-the-height-of-the-ramus
#11
S P Chang, Y Yang, L Q Shi, Y W Liu, Y Liu, Q Ma
Our aim was to improve the accuracy of measurement of the angulation and the shortening of the height of the ramus in fractures of the mandibular condyle using modified methods. We analysed spiral computed tomography (CT) of 67 unilateral fractures with the OsiriX v 5.0 (©Pixmeo Sarl) and Mimics 19.0 (©2016 Materialise NV, Belgium) and analysed them with SPSS (version 24.0, IBM® SPSS® ). Angulation was measured using both the traditional method and our modified method. The results showed significant difference (p = 0...
February 2018: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/29287813/pedicle-screw-with-increased-cortical-purchase-can-be-inserted-with-same-accuracy-as-the-screw-in-straightforward-trajectory-using-3d-modeling-landmarks
#12
Michal Szczodry, Giovanni F Solitro, Farid Amirouche, Priyesh Patel
STUDY DESIGN: Comparison, in terms of insertion accuracy and biomechanical performance, between an increased cortical purchase and straightforward pedicle screw trajectory. OBJECTIVE: This study aims to compare a trajectory with increased cortical purchase to the more common straightforward trajectory in terms of strength and insertion accuracy using real-time navigation. SUMMARY OF BACKGROUND DATA: In previous studies, it was suggested that pedicle screw pullout strength is strongly correlated with bone mineral density, and using a more cortical tract allows a greater portion of the denser bone, the cortex, to be in contact with the screw...
January 2018: Spine Deformity
https://www.readbyqxmd.com/read/29241814/a-new-method-to-locate-the-radial-head-safe-zone-on-computed-tomography-axial-views
#13
Y Zhan, C F Luo, Y J Chen
PURPOSE: Direct location of the "safe zone" on a CT axial view is impossible because the radial head is circular in shape. Previous "safe zone" location methods are not appropriate if the physician is unable to visualize the actual radial head. This study aims to introduce a new method to locate the "safe zone" on CT. METHODS: CT scans were performed on 20 intact cadaveric upper limbs from 20 different corpses in full pronation and supination...
February 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29032819/assessment-of-the-second-mesiobuccal-root-canal-in-maxillary-first-molars-a-cone-beam-computed-tomographic-study
#14
Yuerong Zhang, Hai Xu, Dongmiao Wang, Yongchun Gu, Juan Wang, Shuzhen Tu, Xiaohui Qiu, Fuyu Zhang, Yao Luo, Shi Xu, Jianling Bai, Grandini Simone, Guangdong Zhang
INTRODUCTION: The purpose of this study was to investigate the incidence and location of the second mesiobuccal (MB2) root canal of the maxillary first molar and the relationship between the presence of an MB2 canal and the distribution of canal orifices on the pulpal floor with the aid of cone-beam computed tomographic (CBCT) technology. METHODS: A total of 1008 maxillary first molars (548 patients) were randomly selected and analyzed through CBCT imaging. The association between the incidence of MB2 canals and potential impacting factors including sex, side, age, and the distribution of the main root canal orifices on the pulpal floor was explored...
October 9, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28809631/-comparison-between-the-range-of-movement-canine-real-cervical-spine-and-numerical-simulation-computer-model-validation
#15
COMPARATIVE STUDY
R Srnec, Z Horák, R Sedláček, M Sedlinská, M Krbec, A Nečas
PURPOSE OF THE STUDY In developing new or modifying the existing surgical treatment methods of spine conditions an integral part of ex vivo experiments is the assessment of mechanical, kinematic and dynamic properties of created constructions. The aim of the study is to create an appropriately validated numerical model of canine cervical spine in order to obtain a tool for basic research to be applied in cervical spine surgeries. For this purpose, canine is a suitable model due to the occurrence of similar cervical spine conditions in some breeds of dogs and in humans...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28749837/occlusion-guided-double-barreled-fibular-osteoseptocutaneous-free-flap-for-refined-mandibular-reconstruction-aided-by-virtual-surgical-planning
#16
Xingzhou Qu, Mingyi Wang, Liqun Xu, Jiannan Liu, Shizhu Bai, Chenping Zhang
BACKGROUND: There were many articles about double-barreled fibular flap for mandibular reconstruction. The upper layer bone was suit for implant placement as a new alveolar. The lower layer was necessary for contour. But the accurate relationship between the 2 layers bone was rarely reported. OBJECTIVES: The purpose of this study was twofold: to evaluate the feasibility of the novel design of the double-barreled fibular flap from virtual surgery to actual result; to evaluate the accuracy and results of occlusion-guided double-barreled fibular free flap in mandible reconstruction...
September 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28746083/novel-cardiac-coordinate-modeling-system-for-three-dimensional-quantification-of-inflow-cannula-malposition-of-heartmate-ii-lvads
#17
Brian Lima, Onur Dur, Joyce Chuang, Themistokles Chamogeorgakis, David J Farrar, Kartik S Sundareswaran, Joost Felius, Susan M Joseph, Shelley A Hall, Gonzalo V Gonzalez-Stawinski
Optimal function of left ventricular assist devices (LVADs) depends on proper alignment of the inflow cannula (IC). Quantitative guidelines for IC angulation are lacking because of variation in cardiac geometry and difficulty in analyzing three-dimensional (3D) cannula orientation relative to the left ventricle (LV). Based on contrast-enhanced computed tomography images from five normal and five clinically malpositioned IC cases in patients with HeartMate II LVADs, we developed a method for 3D quantification of IC malpositioning...
March 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28735790/patient-specific-finite-element-analysis-of-fiber-post-and-ferrule-design
#18
Monise de Paula Rodrigues, Priscilla Barbosa Ferreira Soares, Andréa Dollores Correia Miranda Valdivia, Roberto Sales Pessoa, Crisnicaw Veríssimo, Antheunis Versluis, Carlos José Soares
INTRODUCTION: A ferrule on anterior endodontic-treated teeth has been evaluated using clinical trials, in vitro tests, and finite element analysis (FEA). The patient-specific FEA with a nonuniform ferrule and nonlinear contact biting load associated with clinical validation can be used to predict failure. METHODS: A patient was selected with both maxillary central incisors with different ferrule designs who received endodontic treatment and restoration using a fiber post, composite core, and computer aided design and computer aided manufacturing lithium disilicate ceramic crowns...
July 20, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28689393/inter-and-intra-observer-variability-of-the-volume-of-cervical-ossification-of-the-posterior-longitudinal-ligament-using-medical-image-processing-software
#19
Dong Ah Shin, Gyu Yeul Ji, Chang Hyun Oh, Keung Nyun Kim, Do Heum Yoon, Hyunchul Shin
OBJECTIVE: Computed tomography (CT)-based method of three dimensional (3D) analysis (MIMICS(®), Materialise, Leuven, Belgium) is reported as very useful software for evaluation of OPLL, but its reliability and reproducibility are obscure. This study was conducted to evaluate the accuracy of MIMICS(®) system, and inter- and intra-observer reliability in the measurement of OPLL. METHODS: Three neurosurgeons independently analyzed the randomly selected 10 OPLL cases with medical image processing software (MIMICS(®)) which create 3D model with Digital Imaging and Communication in Medicine (DICOM) data from CT images after brief explanation was given to examiners before the image construction steps...
July 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28680848/comparison-of-2-root-surface-area-measurement-methods-3-dimensional-laser-scanning-and-cone-beam-computed-tomography
#20
Jintana Tasanapanont, Janya Apisariyakul, Tanapan Wattanachai, Patiyut Sriwilas, Marit Midtbø, Dhirawat Jotikasthira
PURPOSE: The aim of this study was to compare the use of 3-dimensional (3D) laser scanning and cone-beam computed tomography (CBCT) as methods of root surface measurement. MATERIALS AND METHODS: Thirty teeth (15 maxillary first premolars and 15 mandibular first premolars) from 8 patients who required extractions for orthodontic treatment were selected. Before extraction, pre-treatment CBCT images of all the patients were recorded. First, a CBCT image was imported into simulation software (Mimics version 15...
June 2017: Imaging Science in Dentistry
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