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https://www.readbyqxmd.com/read/29778592/comparative-analysis-of-2-glenoid-version-measurement-methods-in-variable-axial-slices-on-3-dimensionally-reconstructed-computed-tomography-scans
#1
Gregory Cunningham, John Freebody, Margaret M Smith, Mohy E Taha, Allan A Young, Benjamin Cass, Bruno Giuffre
BACKGROUND: Most glenoid version measurement methods have been validated on 3-dimensionally corrected axial computed tomography (CT) slices at the mid glenoid. Variability of the vault according to slice height and angulation has not yet been studied and is crucial for proper surgical implant positioning. The aim of this study was to analyze the variation of the glenoid vault compared with the Friedman angle according to different CT slice heights and angulations. The hypothesis was that the Friedman angle would show less variability...
May 16, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29775910/hip-and-patellofemoral-joint-loading-during-gait-are-increased-in-children-with-idiopathic-torsional-deformities
#2
Elyse Passmore, H Kerr Graham, Marcus G Pandy, Morgan Sangeux
BACKGROUND: Torsional deformities of the femur and tibia are associated with gait impairments and joint pain. Several studies have investigated these gait deviations in children with cerebral palsy. However, relatively little is known about gait deviations in children with idiopathic torsion and debate ensues about the management of these patients. RESEARCH QUESTION: What are the effects of idiopathic increased femoral neck anteversion and external tibial torsion on lower-limb kinematics, kinetics and joint loading during gait in children and adolescents...
May 9, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29772949/lack-of-consensus-on-optimal-acetabular-cup-orientation-because-of-variation-in-assessment-methods-in-total-hip-arthroplasty-a-systematic-review
#3
Thom E Snijders, Koen Willemsen, Steven M van Gaalen, Rene M Castelein, Harrie Weinans, Arthur de Gast
INTRODUCTION: Dislocation is one of the main reasons for revision of total hip arthroplasty but dislocation rates have not changed in the past decades, compromising patients' well-being. Acetabular cup orientation plays a key role in implant stability and has been widely studied. This article investigates whether there is a consensus on optimal cup orientation, which is necessary when using a navigation system. METHODS: A systematic search of the literature in the PubMed, Embase and Cochrane databases was performed (March 2017) to identify articles that investigated the direct relationship between cup orientation and dislocation, including a thorough evaluation of postoperative cup orientation assessment methods...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29765881/determinants-of-hip-and-femoral-deformities-in-children-with-spastic-cerebral-palsy
#4
Yoona Cho, Eun Sook Park, Han Kyul Park, Jae Eun Park, Dong-Wook Rha
Objective: To find factors affecting hip and femoral deformities in children with spastic cerebral palsy (CP) by comparing various clinical findings with imaging studies including plain radiography and computed tomography (CT) imaging. Methods: Medical records of 709 children with spastic CP who underwent thorough baseline physical examination and functional assessment between 2 to 6 years old were retrospectively reviewed. Fifty-seven children (31 boys and 26 girls) who had both plain radiography of the hip and three-dimensional CT of the lower extremities at least 5 years after baseline examination were included in this study...
April 2018: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29764452/risk-factors-for-korean-women-to-develop-an-isthmocele-after-a-cesarean-section
#5
I Y Park, M R Kim, H N Lee, Y Gen, M J Kim
BACKGROUND: The increase in number of cesarean section (CS) operations has resulted in an increase in cases of isthmocele development. The objective of this study is to determine the risk factors for isthmocele development after CS. METHODS: Isthmocele measurements were taken for 404 women with a history of at least one low transverse CS. The following potential risk factors were investigated: patient's age at CS, cause of CS, weeks of gestation at CS, premature rupture of membrane (PROM), phase of labor, type suture (single/double layer), operation time, uterine flexion (anteversion/retroversion), and blood transfusion during operation...
May 15, 2018: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29756497/relationship-between-muscular-and-bony-anatomy-in-native-hips-a-theoretical-background-for-approach-specific-implant-positioning
#6
Doruk Akgün, Philipp von Roth, Tobias Winkler, Carsten Perka, Adam Trepczynski, Bernd Preininger
INTRODUCTION: The aim of this study was to analyse the relationship between bony joint orientation and the distribution of hip musculature. METHODS: The bone anatomy of the hip (femoral antetorsion (AT), acetabular anteversion (AV), and combined anteversion (AV/AT)) and the muscle volume of the gluteal muscles and the tensor fasciae latae were analysed bilaterally using computed tomography data of 49 patients. Muscle force direction (MFD) was determined for each muscle...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29733439/proximal-versus-distal-femoral-derotation-osteotomy-in-bilateral-cerebral-palsy
#7
Mirjam Niklasch, Elizabeth R Boyer, Tom Novacheck, Thomas Dreher, Michael Schwartz
AIM: Femoral derotation osteotomy (FDO) can be conducted either proximally or distally to correct internal rotation gait (IRG) and increased anteversion in children with cerebral palsy (CP). Previous studies with limited numbers of participants have presented comparable short-term static and kinematic outcomes for both techniques. The objective of this retrospective multicentre study was to verify this thesis with a larger number of patients. METHOD: In total, 119 children with CP and IRG were included after matching the groups on preoperative mean stance hip rotation: 67 intertrochanteric (proximal group) FDO (average age at surgery 9y [SD 3y]); 52 supracondylar (distal group) FDO (average age at surgery 12y [SD 3y])...
May 7, 2018: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/29729934/is-direct-anterior-approach-a-credible-option-for-severely-obese-patients-undergoing-total-hip-arthroplasty-a-matched-control-retrospective-clinical-study
#8
Alexander Antoniadis, Dimitris Dimitriou, Andreas Flury, Gregor Wiedmer, Julian Hasler, Naeder Helmy
BACKGROUND: Severely obese patients present a significant challenge for arthroplasty surgeons because of their body habitus. Up to date, there is no clear consensus on the safety of the direct anterior approach (DAA) in obese patients undergoing total hip arthroplasty. Therefore, the purpose of the present study was to determine whether DAA is a credible option in severely obese regarding complication rates, clinical outcomes, and component positioning. METHODS: Obese patients with a body mass index ≥ 35 kg/m2 (n = 129) who received total hip arthroplasty with DAA in our institution were matched for gender and age with nonobese patients with body mass index ≤ 25 kg/m2 (n = 125)...
April 11, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29720218/the-anteroposterior-axis-of-the-tibia-is-adjusted-to-approximately-a-right-angle-to-the-anterior-pelvic-plane-in-the-standing-position-in-patients-with-hip-dysplasia-similar-to-normal-subjects-a-cross-sectional-study
#9
Norio Imai, Dai Miyasaka, Hayato Suzuki, Kazuki Tsuchiya, Tomoyuki Ito, Izumi Minato, Naoto Endo
BACKGROUND: We previously described that the anteroposterior (AP) axis of the tibia is approximately perpendicular to the transverse axis of the anterior pelvic plane (APP) in the standing position in healthy subjects. The purpose of this study was to investigate the rotational alignment between the APP and clinical epicondylar axis and the AP axis of the tibia relative to pelvic coordination in the standing position in normal subjects and in women with developmental dysplasia of the hip (DDH) to aid decision making for surgeons in the alignment of implants in total hip or knee arthroplasty...
May 2, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29707056/characterization-of-proximal-femoral-anatomy-in-the-skeletally-immature-patient
#10
B G Beutel, S J Girdler, J A Collins, N Y Otsuka, A Chu
Purpose: The morphology of the proximal femur has been extensively studied in the adult population. However, no literature providing a comprehensive evaluation of the anatomy in paediatric patients exists. The current study aims to characterize such anatomy in skeletally-immature patients, examine potential differences between genders, and analyze how these anatomical parameters change with age. Methods: Cadaveric femurs from the Hamann-Todd Osteological Collection were examined...
April 1, 2018: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/29704024/the-relationship-of-pelvic-incidence-to-post-operative-total-hip-arthroplasty-dislocation-in-patients-with-lumbar-fusion
#11
Philip J York, Alan S McGee, Chase S Dean, Justin E Hellwinkel, Christopher J Kleck, Michael R Dayton, Craig A Hogan
PURPOSE: To determine if lumbar fusion increases the risk of dislocation following total hip arthroplasty (THA) via a posterior approach and to investigate anatomic variables associated with this increased risk. METHODS: Five-year retrospective review of THAs performed through a posterior approach identifying cases of post-operative dislocation. Patients were grouped into those with or without previous lumbar spine fusion. Lumbar fusion patients were then further analyzed in terms of cup position, pelvic incidence, sacral slope, and pelvic tilt to determine if there were specific variables associated with the increased risk of dislocation...
April 28, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29696606/femoral-derotational-osteotomies
#12
REVIEW
Manfred Nelitz
PURPOSE OF REVIEW: Femoral derotational osteotomies are performed to correct residual symptomatic increased femoral torsion in adolescents and adults. Typical indications are anterior knee pain caused by patellar maltracking and patellofemoral instability. There is still no consensus as to what the correct indication is and which surgical techniques lead to the best outcomes in performing a femoral derotational osteotomy. RECENT FINDINGS: Good early clinical outcomes have been reported...
April 25, 2018: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/29695317/influence-of-joint-kinematics-on-polyethylene-wear-in-anatomic-shoulder-joint-arthroplasty
#13
Steffen Braun, Stefan Schroeder, Ulrike Mueller, Robert Sonntag, Matthias Buelhoff, Jan Philippe Kretzer
BACKGROUND: Despite the positive results in total shoulder arthroplasties (TSAs), a higher revision rate is documented compared with total hip and knee replacements. Wear is the possible main cause of TSA failure in the long-term. This study investigated the effect of joint kinematics and the influence of the rotator cuff on the polyethylene wear performance in an anatomic TSA. METHODS: Lifting a load of 2 kg with an abduction/adduction of 0° to 90° was simulated for 2 × 106 cycles as a primary motion using a fully kinematic joint simulator...
April 23, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29692894/primary-total-hip-arthroplasty-staying-out-of-trouble-intraoperatively
#14
REVIEW
Shahryar Noordin, Riaz Lakdawala, Bassam A Masri
Total hip Arthroplasty is one of the most successful and commonly performed procedures in Orthopaedic Surgery. Meticulous preoperative planning allows to surgeon anticipate potential problems to reduce postoperative complications and optimize patient outcomes. Currently, the posterior approach is the most common approach utilized in the United States. In order to prevent errors in stem version, especially with cementless fixation, the entry point should be posterior, and the initial entry point should be aligned in the correct anteversion as this will determine the ultimate version of the stem...
May 2018: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/29683001/relationship-between-femoral-anteversion-and-tibial-torsion-ct-evaluation-of-38-unilateral-developmental-dysplasia-of-the-hip-patients
#15
Kyu-Jin Cho, Kyung-Soon Park, Young-Rok Shin, Hong-Yeol Yang, Taek-Rim Yoon
INTRODUCTION: Patients with developmental dysplasia of the hip (DDH) present with a wide spectrum of deformities. Few studies have assessed the relationship between femoral anteversion (FA) and rotational profile. The aim of this study is to evaluate the influence of FA on the lower extremity rotational profile by comparing tibial torsion (TT) between the extremities on both sides in patients with unilateral DDH, using computed tomography (CT). PATIENTS AND METHODS: Thirty eight patients with unilateral developmental dysplasia of the hip, who underwent a preoperative rotational profile CT scan at our institution, were evaluated...
April 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29678037/semi-automatically-measuring-shoulders-range-of-motion-objective-measurements-with-good-reliability-and-accuracy
#16
Birgit Saalfeld, Ilonka Pingel, Klaus-Hendrik Wolf
The shoulder's range of motion (ROM) is an important measurement for the diagnostic process and course of treatment for patients with shoulder disorders or injuries. Visual estimation to assess a shoulder's ROM is a fast measuring method, and therefore routinely used in clinical practice. Studies already proved this method as very subjective and unreliable. Misestimating the severity of a patient's disability can lead to improper treatment and should be avoided. Modern technology may help measuring the ROM more reliable, objective, non-invasive and still fast...
2018: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/29661526/a-retrieval-analysis-of-impingement-in-dual-mobility-liners
#17
Trevor P Scott, Lydia Weitzler, Anthony Salvatore, Timothy M Wright, Geoffrey H Westrich
BACKGROUND: Implant-related impingement is likely a major causative factor of total hip arthroplasty (THA) instability. Dual-mobility (DM) cups can theoretically improve stability in THA, but impingement rates with DM cups are not well studied. We examined retrieved DM THA liners to determine if less evidence existed for prosthetic impingement between the neck and the polyethylene liner than historical studies from our institution on fixed-bearing THAs. METHODS: DM components from 93 THAs were identified from 164 THAs whose DM components were revised between 2008 and 2015 through our institutional review board-approved implant retrieval program...
March 16, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29657851/kinematic-alignment-technique-for-total-hip-and-knee-arthroplasty-the-personalized-implant-positioning-surgery
#18
Charles Rivière, Stefan Lazic, Loïc Villet, Yann Wiart, Sarah Muirhead Allwood, Justin Cobb
Conventional techniques for hip and knee arthroplasty have led to good long-term clinical outcomes, but complications remain despite better surgical precision and improvements in implant design and quality.Technological improvements and a better understanding of joint kinematics have facilitated the progression to 'personalized' implant positioning (kinematic alignment) for total hip (THA) and knee (TKA) arthroplasty, the true value of which remains to be determined.By achieving a true knee resurfacing, the kinematic alignment (KA) technique for TKA aims at aligning the components with the physiological kinematic axes of the knee and restoring the constitutional tibio-femoral joint line frontal and axial orientation and soft-tissue laxity...
March 2018: EFORT Open Reviews
https://www.readbyqxmd.com/read/29656970/predictability-of-pelvic-tilt-during-total-hip-arthroplasty-using-a-traction-table
#19
Paul S Roettges, Jack R Hannallah, Jordan L Smith, John T Ruth
BACKGROUND: Pelvic positioning during total hip arthroplasty (THA) affects functional position of the acetabular component. We sought to evaluate whether preoperative pelvic tilt correlated with intraoperative pelvic tilt while positioned on a traction table for direct anterior THA and furthermore to evaluate whether there was a consistent and predictable effect on pelvic tilt while positioned for surgery. METHODS: We evaluated the sagittal spinopelvic preoperative standing and supine pelvic tilt radiographic measurements as compared with intraoperative measurements of 25 patients...
March 16, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29615377/correct-assessment-of-acetabular-component-orientation-in-total-hip-arthroplasty-from-plane-radiographs
#20
Diana Widmer, Kilian Reising, Elmar Kotter, Peter Helwig
BACKGROUND: Correct positioning of the cup is an important factor in total hip arthroplasty. Assessing its position from a plain anteroposterior pelvic radiograph is known to be hampered by systemic errors. This study focuses on developing a correction method to adjust for these potential sources of error and to eliminate them based on a 3D geometric analysis. METHODS: Computed tomography scans of 113 (66 male, 47 female) pelvices were reconstructed and virtually projected onto a plain radiograph with varying rotational and translational positions...
March 2, 2018: Journal of Arthroplasty
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