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https://www.readbyqxmd.com/read/28102157/sexual-dimorphism-of-acetabular-anatomy-based-on-three-dimensional-computed-tomography-image-of-pelvises
#1
Bartosz Musielak, Michał Rychlik, Marek Jóźwiak
BACKGROUND: The study aimed to compare sex differences in the morphology and spatial orientation of pelvic acetabula to advance the understanding of hip anatomy. MATERIAL AND METHODS: The study was based on three-dimensional reconstructions of computed tomography images of 50 female and 50 male acetabula. The images were used for spatial analysis of hip acetabula relative to the base of the sacral bone as the plane of reference. Statistical analysis was performed to compare angles relevant to the actual axis of the acetabulum (inclination angle, anteversion angle, tilt angle) as well as the volume and inner surface area of the acetabulum...
October 28, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28101589/-intramedullary-nailing-in-diaphyseal-clavicle-fractures-using-minimally-invasive-percutaneous-reduction
#2
M Müller, T Freude, U Stöckle, T M Kraus
OBJECTIVE: Closed reduction and intramedullary nailing is common in diaphyseal clavicle fractures. The aim of this report is to demonstrate a surgical method with minimally invasive percutaneous reduction in cases where closed reduction fails. The procedure is associated with good cosmetic results. INDICATIONS: Percutaneous reduction using two reduction forceps enables intramedullary nailing without an open procedure. CONTRAINDICATIONS: Open, multifragmented or non-dislocated fractures, oblique fractures due to postoperative dislocation or shortening risk, fracture having potential to become compound fractures, neurovascular complications, pseudoarthroses...
January 18, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28087161/effect-of-acetabular-position-on-polyethylene-liner-wear-measured-using-simultaneous-biplanar-acquisition
#3
Prateek Goyal, James L Howard, Xunhua Yuan, Matthew G Teeter, Brent A Lanting
BACKGROUND: Studies that have previously examined the relationship between acetabular component inclination angle and polyethylene wear have shown increased wear of conventional polyethylene with high inclination angles. To date, there are no long-term in vivo studies examining the correlation between cup position and polyethylene wear with highly crosslinked polyethylene. METHODS: An institutional arthroplasty database was used to identify patients who had metal-on-highly crosslinked polyethylene primary total hip arthroplasty using the same component design with a minimum follow-up of 10 years...
December 14, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28075046/a-standardized-fluoroscopy-based-technique-to-measure-intraoperative-cup-anteversion
#4
Matthieu Zingg, Sana Boudabbous, Didier Hannouche, Xavier Montet, Friedrich Boettner
Direct anterior approach (DAA) with the patient lying supine has facilitated the use of intraoperative fluoroscopy and allows for standardized positioning of the patient. The current study presents a new technique to measure acetabular component anteversion using intraoperative fluoroscopy. The current paper describes a mathematical formula to calculate true acetabular component anteversion based on the acetabular component abduction angle and the c-arm tilt angle (CaT). The CaT is determined by tilting the c-arm until an external pelvic oblique radiograph with the equatorial plane of the acetabular component perpendicular to the fluoroscopy receptor is obtained...
January 11, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28063078/analysis-of-acetabular-orientation-and-femoral-anteversion-using-images-of-three-dimensional-reconstructed-bone-models
#5
Jaeyeong Park, Jun-Young Kim, Hyun Deok Kim, Young Cheol Kim, Anna Seo, Minkyu Je, Jong Uk Mun, Bia Kim, Il Hyung Park, Shin-Yoon Kim
PURPOSE: Radiographic measurements using two-dimensional (2D) plain radiographs or planes from computed tomography (CT) scans have several drawbacks, while measurements using images of three-dimensional (3D) reconstructed bone models can provide more consistent anthropometric information. We compared the consistency of results using measurements based on images of 3D reconstructed bone models (3D measurements) with those using planes from CT scans (measurements using 2D slice images)...
January 6, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28062966/the-existence-of-a-natural-plica-at-the-anatomical-base-of-the-antihelix-and-its-surgical-importance-to-address-protruding-ears-an-anatomicosurgical-study
#6
Miguel Marques Oliveira, Daniel Sousa Marques Oliveira, Gustavo Sousa Marques Oliveira
BACKGROUND: Protruding ears represent the main abnormality of the external ear, which has required numerous anatomic and surgical studies. Most studies give attention to the absence of the antihelix as the anatomic defect responsible for the clinical deformity of the lateral aspect of the ear that leads to its anteversion. The reason for this study is the controversial origin of the fold of the antihelix within the auricle framework, a field of interest for aesthetic otoplasty. The current study examined the medial surface of the cartilaginous ear frame from cadaver specimens with right morphology to investigate the starting point of the fold of the antihelix...
January 7, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/28041773/efficacy-of-the-anatomical-pelvic-plane-positioner-in-total-hip-arthroplasty-in-the-lateral-decubitus-position
#7
Kentaro Iwakiri, Akio Kobayashi, Yoichi Ohta, Kunio Takaoka
BACKGROUND: Total hip arthroplasty in the lateral position involves particularly large variance in the sagittal tilt of pelvis fixation, which affects the imprecision of the cup anteversion leading to poor outcomes. We have added an additional compression pad to an existing device, also to be used in the lateral position, but theoretically enabling fixation on the anatomical pelvic plane (APP) serving as the reference plane. The present study aims to evaluate the usefulness of this device in comparison with the conventional device...
December 11, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28029702/evaluation-of-a-scoring-system-based-on-conformation-factors-to-predict-cranial-cruciate-ligament-disease-in-labrador-retrievers
#8
Dominique J Griffon, Devin Cunningham, Wanda J Gordon-Evans, Rei Tanaka, K A Bruecker, Randy J Boudrieau
OBJECTIVE: To determine the association of a radiographic score derived from tibial plateau angle (TPA) and femoral anteversion (FAA) with an outcome of cranial cruciate ligament deficiency (CCLD) in large dogs. STUDY DESIGN: Cross-sectional study. ANIMALS: 167 Labrador Retrievers. METHODS: Hind limbs of sound Labrador Retrievers over 6 years of age were considered at low risk for CCLD. Limbs were considered high risk for CCLD if they were affected or predisposed (sound contralateral limb in dogs with unilateral CCLD)...
December 28, 2016: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28027530/sagittal-spinopelvic-alignment-predicts-hip-function-after-total-hip-arthroplasty
#9
Hironori Ochi, Yasuhiro Homma, Tomonori Baba, Hidetoshi Nojiri, Mikio Matsumoto, Kazuo Kaneko
The aim of this study was to investigate the association between preoperative sagittal spinopelvic alignment and postoperative clinical outcomes after total hip arthroplasty (THA). This retrospective study included 92 patients with hip osteoarthritis who underwent primary THA between May 2013 and October 2015. Patients' characteristics, radiographic sagittal spinopelvic parameters and modified Harris Hip Scores, including function scores (gait scores and functional activities scores), were investigated. Multivariate linear regression analysis was performed to determine the associations between each preoperative sagittal spinopelvic parameter and postoperative hip function The preoperative sagittal spinopelvic parameters that were associated with postoperative gait scores were sagittal vertical axis (adjusted β-coefficient=-0...
December 14, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28025151/normative-3d-acetabular-orientation%C3%A2-measurements-by-the-low-dose-eos-imaging-system-in-102-asymptomatic-subjects-in-standing-position-analyses-by-side-gender-pelvic-incidence-and-reproducibility
#10
Thomas Thelen, Philippe Thelen, Hugues Demezon, Stephane Aunoble, Jean-Charles Le Huec
BACKGROUND: Three-dimensional (3D) acetabular orientation is a fundamental topic in orthopedic surgery. Computed tomography (CT) allows 3D measurement of native acetabular orientation, but with a substantial radiation dose. The EOS imaging system was developed to perform this kind of evaluation, but has not been validated in this indication with specific attention to the acetabulum. We therefore performed a prospective study using EOS to assess: 1) the reproducibility of the 3D acetabulum orientation measures; 2) normative asymptomatic acetabular morphology in standing position, according to side and gender; and 3) the relationship between acetabular anteversion and pelvic incidence...
December 23, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28007372/wear-rates-of-larger-diameter-cross-linked-polyethylene-at-5-to-13-years-does-liner-thickness-or-component-position-matter
#11
Jonathan G Haw, Andrew K Battenberg, Der-Chen T Huang, Thomas P Schmalzried
BACKGROUND: Cross-linked polyethylene (XLPE) has demonstrated significantly reduced wear and osteolysis into the second decade for total hip arthroplasty. There is a relative paucity of data with ≥36-mm bearings. Issues include potential effects of reduced liner thickness and component position on wear, osteolysis, and mechanical failure of the bearing. METHODS: Radiographs of 48 primary total hip arthroplasties with ≥36-mm modular XLPE bearings were analyzed at a minimum 5 years postoperative on serial radiographs using a validated, edge-detection-based algorithm...
November 23, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28003067/editorial-commentary-hip-capsule-to-repair-or-not
#12
EDITORIAL
Dean K Matsuda
Arthroscopic hip capsular repair is an area of intense interest. Basic science studies suggest that adverse changes in capsular stability/restraint may occur with capsulotomy and capsulectomy, that repair may ameliorate these changes, and, most recently, that the repaired capsule usually heals. Clinical studies suggest that in some conditions, most notably mild dysplasia, capsular repair or plication may improve short-term outcomes, but in general, the role of capsular closure is less clear. At present, perhaps a selective approach is merited, with capsular closure performed in patients with dysplasia, focal or generalized hyperlaxity, and/or increased femoral anteversion...
January 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27988165/increased-femoral-anteversion-influence-over-surgically-treated-recurrent-patellar-instability-patients
#13
Carlos Eduardo Franciozi, Luiz Felipe Ambra, Leonardo José Bernardes Albertoni, Pedro Debieux, Fernando Cury Rezende, Mauricio Ayres de Oliveira, Marcio de Castro Ferreira, Marcus Vinícius Malheiros Luzo
PURPOSE: To verify the influence that increased femoral anteversion (FA) has on patients with recurrent patellar instability (RPI) treated by anteromedialization tibial tubercle osteotomy (TTO) combined with medial patellofemoral ligament reconstruction (MPFLR) and to present the midterm outcomes of these patients. METHODS: From January 2008 to August 2013, skeletally mature patients with RPI and tibial tubercle (TT)-trochlear groove (TG) ≥ 17 mm who underwent anteromedialization TTO combined with MPFLR were evaluated for J sign, patellar glide, apprehension test, increased FA, Caton index, trochlea dysplasia, TT-TG, Kujala, International Knee Documentation Committee subjective knee evaluation form, and Tegner...
December 14, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27965176/effect-of-acetabular-component-positioning-on-functional-outcomes-in-primary-total-hip-arthroplasty
#14
Prateek Goyal, Adrian Lau, Douglas D Naudie, Matthew G Teeter, Brent A Lanting, James L Howard
BACKGROUND: Acetabular component positioning is crucial to a successful total hip arthroplasty (THA). This study evaluated the effect of absolute acetabular component position as well as acetabular position relative to bony anatomy on patient-reported functional outcomes after primary THA. METHODS: Primary, press fit, hemispherical metal-on-polyethylene THA performed between 2003 and 2011 were analyzed. Western Ontario and McMaster Osteoarthritis Index (WOMAC), Harris Hip Score (HHS), Short Form-12 scores, and radiographs between 2 and 3 years after the index procedure were assessed...
August 26, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27960222/factors-predisposing-to-dislocation-after-primary-total-hip-arthroplasty-a-multivariate-analysis-of-risk-factors-at-7-to-10-years-follow-up
#15
Michele Francesco Surace, Luca Monestier, Fabio D'Angelo, Andrea Bertagnon
BACKGROUND: Dislocation of primary THA (total hip arthroplasty) is one of the most undesirable complications with an incidence ranging from 2% to 5%. Several risk factors are described, related to the patient, surgery, or prosthetic design. The aim of the study was to assess risk factors and their potential influence on dislocation. MATERIALS AND METHODS: 387 primary THA were performed between September 2005 to December 2008 at our institute (Varese, Italy) through a modified posterior-lateral approach...
December 13, 2016: Surgical Technology International
https://www.readbyqxmd.com/read/27939070/femoroacetabular-impingement-and-pelvic-incidence-radiographic-comparison-to-an-asymptomatic-control
#16
Michael D Hellman, Bryan D Haughom, Nicholas M Brown, Yale A Fillingham, Marc J Philippon, Shane J Nho
PURPOSE: To investigate whether pelvic incidence (PI) in patients with symptomatic femoroacetabular impingement was different from that in a normal population. METHODS: Retrospective analysis of 30 consecutive female and 30 consecutive male patients with computed tomography scans who underwent hip arthroscopy for FAI. PI was measured using scout lateral radiographs. The center-edge angle (CEA), acetabular version, and α angle were also measured. Each patient was subcategorized as having a cam-type deformity (α angle >55°), a deep socket deformity (CEA >39°), and/or a retroverted acetabulum (acetabular anteversion <15°)...
December 8, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27926680/humeral-retroversion-in-children-with-shoulder-internal-rotation-contractures-secondary-to-upper-trunk-neonatal-brachial-plexus-palsy
#17
Michael L Pearl, Michael Batech, Fabian van de Bunt
BACKGROUND: The most common sequela of neonatal brachial plexus palsy is an internal rotation contracture of the shoulder that impairs function and leads to skeletal deformation of the glenohumeral joint. Treatment options include release, transfers, and humeral osteotomy, all ultimately striving for better function through increased external rotation. Prior studies have shown that neonatal brachial plexus palsy alters humeral retroversion but with conflicting findings. We studied retroversion in children with internal rotation contractures from neonatal brachial plexus palsy to clarify its effect on version and surgical planning...
December 7, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/27920583/intellijoint-hip-%C3%A2-a-3d-mini-optical-navigation-tool-for-improving-intraoperative-accuracy-during-total-hip-arthroplasty
#18
Wayne G Paprosky, Jeffrey M Muir
Total hip arthroplasty is an increasingly common procedure used to address degenerative changes in the hip joint due to osteoarthritis. Although generally associated with good results, among the challenges associated with hip arthroplasty are accurate measurement of biomechanical parameters such as leg length, offset, and cup position, discrepancies of which can lead to significant long-term consequences such as pain, instability, neurological deficits, dislocation, and revision surgery, as well as patient dissatisfaction and, increasingly, litigation...
2016: Medical Devices: Evidence and Research
https://www.readbyqxmd.com/read/27913129/preoperative-planning-and-operative-techniques-of-the-shorter-tapered-stem-compared-to-the-metaphyseal-fit-stem-in-cementless-total-hip-arthroplasty
#19
Hiroshi Imai, Joji Miyawaki, Tomomi Kamada, Akira Maruishi, Jun Takeba, Hiromasa Miura
BACKGROUND: In order to prevent postoperative dislocation due to prosthetic impingement as a result of total hip arthroplasty (THA), the combined anteversion (CA) theory, which combines the anteversion of the femoral stem and the acetabular socket, has been revised in recent years. Particularly, it is necessary to keep CA within the target zone. METHODS: The aim of this study was to investigate whether postoperative CA can be kept within the target zone while using the operative technique which prepares the socket first in cementless THA, by estimating the anteversion of the metaphyseal fit stem or the shorter, tapered wedge stem using preoperative 3-dimensional computerized planning, and by adjusting the anteversion of the socket using a navigation system that considers CA...
November 10, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27911346/influence-of-pelvic-tilt-on-functional-acetabular-orientation
#20
Robert K Zahn, Sarah Grotjohann, Matthias Pumberger, Heiko Ramm, Stefan Zachow, Michael Putzier, Carsten Perka, Stephan Tohtz
BACKGROUND: Pelvic tilt influences acetabular orientation (AO). Anatomical AO can be measured in relation to the anterior pelvic plane (APP), functional AO can be calculated relative to table's plane. OBJECTIVE: To assess to what extent functional AO is determined by pelvic tilt and if APP and table plane give equal information for correct AO. METHODS: AO was evaluated by computed tomography (CT) scans of 138 patients. Pelvic tilt, anatomical and functional AO were measured, differences between the two reference planes were calculated...
November 25, 2016: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
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