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https://www.readbyqxmd.com/read/28630749/imaging-in-peri-prosthetic-assessment-an-orthopaedic-perspective
#1
Christoph H Lohmann, Sanjiv Rampal, Martin Lohrengel, Gurpal Singh
As imaging techniques are ever-evolving, this article aims to provide a brief overview of the various modalities including their limitations. The ability of imaging for evaluation of implant osseo-integration will be addressed and also the role of imaging in assessing septic and aseptic loosening, with a particular focus on adverse tissue reactions, will be discussed. Specific features when imaging the big joints such as shoulder, hip, knee and ankle joint will also be outlined.Overall, a lack of standardisation and validity was noted and despite the gross variety of imaging modalities, there is no technique covering all aspects required for evaluation of implant fixation and septic and aseptic loosening...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28625098/endoprosthetic-replacement-versus-cement-spacer-in-reconstruction-of-proximal-humerus-after-tumor-resection-cost-and-benefits
#2
Awad Abdelmonem Rafalla, El Sayed Abdelhalim Abdullah
BACKGROUND: Proximal end of the humerus is a common site for both primary and metastatic bone tumors. Limb salvage with endoprosthetic replacement is the most common means of reconstruction, but it has been proved that cement spacer are more beneficial for inferior shoulder function. Thus, limb salvage can be replaced by cheaper spacers especially in poor societies. PATIENTS AND METHODS: This study included 20 patients, of whom 14 were female, with a mean age of 40...
May 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28621284/comparison-of-platform-switched-and-sloping-shoulder-implants-on-stress-reduction-in-various-bone-densities-finite-element-analysis
#3
Joji Markose, S Suresh, Shruthi Eshwar, K Rekha, Vipin Jain, Supriya Manvi
INTRODUCTION: Comparison of platform switched (PS), sloping shoulder, and regular implants on stress reduction in various bone densities with finite element analysis. MATERIALS AND METHODS: A total of 12 three-dimensional finite element models were built to analyze the stress distribution model. Nobel Biocare 4.3 × 8 mm regular platform replace select implant with matching diameter easy abutment, Nobel Biocare 4.3 × 8 mm replace select implant PS with 3.5 mm diameter easy abutment, Bicon 4 × 8 mm implant with 4 mm diameter sloping shoulder abutments were created virtually in compact bone density using software...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28615339/interhemispheric-interactions-between-trunk-muscle-representations-of-the-primary-motor-cortex
#4
Loyda Jean-Charles, Jean-François Nepveu, Joan E Deffeyes, Guillaume Elgbeili, Numa Dancause, Dorothy Barthélemy
Unilateral arm movements require trunk stabilization through bilateral contraction of axial muscles. Interhemispheric interactions between primary motor cortices (M1) could enable such coordinated contractions but these mechanisms are largely unknown. Using transcranial magnetic stimulation (TMS), we characterized interhemispheric interactions between M1 representations of the trunk stabilizing muscle erector spinae at 1(st) lumbar vertebra (ES L1) during a right isometric shoulder flexion. These interactions were compared to those of Anterior Deltoid (AD), the main agonist in this task, and the first dorsal interosseous (FDI)...
June 14, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28607788/a-case-of-fracture-redislocation-of-the-hip-caused-by-a-depressed-fracture-of-the-femoral-head-similar-to-a-hill-sachs-lesion
#5
Yoshihiko Okudera, Hiroaki Kijima, Shin Yamada, Natsuo Konishi, Hitoshi Kubota, Hiroshi Tazawa, Takayuki Tani, Norio Suzuki, Keiji Kamo, Ken Sasaki, Tetsuya Kawano, Yosuke Iwamoto, Naohisa Miyakoshi, Yoichi Shimada
The present case shows a case of fracture-redislocation of the hip caused by a depressed fracture of the femoral head similar to a Hill-Sachs lesion. A 59-year-old man fell from a roof and his left hip joint was dislocated posteriorly. He was admitted to a nearby hospital, and he was referred to our hospital more than 24 hours after injury. Computed tomography (CT) suggested a bone chip from the posterior wall of the acetabulum roof and a depressed femoral head that cut into the posterior margin of the acetabulum roof...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28606638/retrospective-cohort-study-on-radial-head-replacements-comparing-results-between-smooth-and-porous-stem-designs
#6
Mélissa Laflamme, Pierre-Philippe Grenier-Gauthier, Alexandre Leclerc, Stéphanie Antoniades, Anne-Marie Bédard
BACKGROUND: When necessary, radial head integrity after a fracture can be re-created by the use of a radial head arthroplasty if the radial head is judged irreparable. The purpose of this study was to compare the clinical and radiographic outcomes of metal modular radial head replacements with a smooth vs. a porous stem. METHODS: A retrospective cohort study of radial head replacements performed in the first 4 weeks after a trauma in an adult patient at our institution between 2000 and 2014 was completed...
June 9, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28567223/reverse-total-shoulder-arthroplasty-salvage-procedure-for-failed-prior-arthroplasty
#7
Seong Hwan Jo, Jung Youn Kim, Nam Su Cho, Yong Girl Rhee
BACKGROUND: To evaluate the clinical outcome of revision of primary shoulder replacement by using reverse total shoulder arthroplasty (RTSA). METHODS: Seven patients underwent revision RTSA with a mean follow-up of 22.1 months (range, 12 to 54 months). Their mean age at the time of operation was 75.5 years (range, 70 to 80 years). Assessments were performed on the preoperative and postoperative visual analogue scale (VAS) score, muscle strength, range of motion, University of California at Los Angeles (UCLA) score, Constant score, subjective satisfaction and the anteroposterior and axillary views of the glenohumeral joint...
June 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/28558822/do-outcomes-reported-in-randomised-controlled-trials-of-joint-replacement-surgery-fulfil-the-omeract-2-0-filter-a-review-of-the-2008-and-2013-literature
#8
Peter D H Wall, Bethan L Richards, Andrew Sprowson, Rachelle Buchbinder, Jasvinder A Singh
BACKGROUND: It is not known, whether outcome reporting in trials of total joint arthroplasty in the recent years is adequate or not. Our objective was to assess whether outcomes reported in total joint replacement (TJR) trials fulfil the Outcome Measures in Rheumatology (OMERACT) Filter 2.0. METHODS: We systematically reviewed all TJR trials in adults, published in English in 2008 or 2013. Searches were conducted in the Cochrane Central Register of Controlled Trials, MEDLINE, and EMBASE...
May 30, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28558113/retrieval-analysis-of-porous-titanium-glenoid-posts-an-evaluation-of-osteointegration
#9
Jacob G Calcei, Julien Berhouet, Marcella Elpers, Anthony Catanzano, Timothy M Wright, Edward V Craig, Russell F Warren, David M Dines, Lawrence V Gulotta
Glenoid component loosening is a commonly encountered complication of total shoulder replacements. Therefore, focus has been placed on glenoid fixation. Porous metal implants, which promote biological fixation through osteointegration, have provided an uncemented alternative to the traditional cemented implant. In this explantation study, the authors examined the bone ingrowth and ongrowth of a specific porous titanium glenoid peg. Six explanted polyethylene glenoid components with porous titanium-coated central pegs were identified in the authors' implant retrieval program via retrospective review...
May 30, 2017: Orthopedics
https://www.readbyqxmd.com/read/28528351/the-influence-of-critical-shoulder-angle-on-secondary-rotator-cuff-insufficiency-following-shoulder-arthroplasty
#10
Simone Cerciello, Andrew Paul Monk, Enrico Visonà, Stefano Carbone, Thomas Bradley Edwards, Nicola Maffulli, Gilles Walch
INTRODUCTION: Secondary cuff failure after shoulder replacement is disabling and often requires additional surgery. Increased critical shoulder angle (CSA) has been found in patients with cuff tear compared to normal subjects. The interobserver reliability of the CSA and the relationship between CSA and symptomatic secondary cuff failure after shoulder replacement were investigated. MATERIALS AND METHODS: Nineteen patients with symptomatic cuff failure after anatomic shoulder replacement (mean FU 45 months) were compared to a control group of 29 patients showing no signs of symptomatic cuff failure (mean FU 105...
May 20, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28521848/impacts-of-stocking-density-on-development-and-puberty-attainment-of-replacement-beef-heifers
#11
K M Schubach, R F Cooke, A P Brandão, K D Lippolis, L G T Silva, R S Marques, D W Bohnert
In all, 60 Angus×Hereford heifers were ranked by age and BW (210±2 days and 220±2 kg) on day 0, and assigned to: (a) one of three drylot pens (10×14 m pens; 10 heifers/pen) resulting in a stocking density of 14 m2/heifer (HIDENS; n=3), or (b) one of three pastures (25 ha pastures; 10 heifers/pasture), resulting in a stocking density of 25 000 m2/heifer (LOWDENS; n=3). Pastures were harvested for hay before the beginning of this experiment, and negligible forage was available for grazing to LOWDENS heifers during the experiment (days 0 to 182)...
May 19, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28509584/the-influence-of-the-crutch-setup-on-stability-and-weight-bearing-parameters-in-post-total-hip-replacement-surgery-patients-during-quiet-standing
#12
Francesco Esposito, Marco Freddolini, Leonardo Latella, Palmina Braccio, Massimiliano Marcucci, Andrea Corvi
PURPOSE: The purpose of this study is to evaluate the influence of the crutch setup on standing, in post total hip replacement (THR) surgery patients. MATERIALS AND METHODS: Thirty patients after THR were randomly assigned to walking with the elbow flexed (EF) or elbow straight (ES) crutch setup. Subjects were asked to stand on a force platform in a comfortable position with the crutch positioned on the unaffected side, facing forward for 10 seconds. Centre of pressure total path and maximal excursion were evaluated in both medio-lateral and anterior-posterior planes...
May 16, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28496293/the-effect-of-dopaminergic-medication-on-joint-kinematics-during-haptic-movements-in-individuals-with-parkinson-s-disease
#13
Kuan-Yi Li, Pei-Yi Chu, Kristen A Pickett
This study examined whether altered joint angular motion during haptic exploration could account for a decline in haptic sensitivity in individuals with PD by analyzing joint position data during haptic exploration of a curved contour. Each participant's hand was passively moved by a robotic arm along the edges of a virtual box (5 cm × 15 cm) with a curved left wall. After each trial, participants indicated whether the contour was curved or straight. Visual, auditory, and tactile cues were occluded, and an electrogoniometer recorded shoulder and elbow joint angles during each trial...
2017: Behavioural Neurology
https://www.readbyqxmd.com/read/28483433/can-glenoid-wear-be-accurately-assessed-using-x-ray-imaging-evaluating-agreement-of-x-ray-and-magnetic-resonance-imaging-walch-classification
#14
Michaela Kopka, Mitchell Fourman, Ashish Soni, Andrew C Cordle, Albert Lin
BACKGROUND: The Walch classification is the most recognized means of assessing glenoid wear in preoperative planning for shoulder arthroplasty. This classification relies on advanced imaging, which is more expensive and less practical than plain radiographs. The purpose of this study was to determine whether the Walch classification could be accurately applied to x-ray images compared with magnetic resonance imaging (MRI) as the gold standard. We hypothesized that x-ray images cannot adequately replace advanced imaging in the evaluation of glenoid wear...
May 5, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28464753/a-radial-head-prosthesis-appears-to-be-unnecessary-in-mason-iv-fracture-dislocation
#15
Jens Nestorson, Per-Olof Josefsson, Lars Adolfsson
Background and purpose - Previous reports on elbow injuries with concomitant comminute radial head fracture are difficult to interpret, since they include an array of different soft-tissue and bony injuries around the elbow. We focused on Mason-IV fracture dislocations of the elbow and retrospectively reviewed 2 treatment options: radial head resection or replacement with a radial head arthroplasty, both in combination with lateral ligament repair. Patients and methods - In Linköping, 18 consecutive patients with Mason-IV fracture dislocation and with a median age of 56 (19-79) years were treated with a radial head arthroplasty...
June 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28453346/outcomes-of-surface-replacement-proximal-interphalangeal-joint-arthroplasty-through-a-volar-approach-a-prospective-study
#16
Thomas E Trumble, Dennis J Heaton
BACKGROUND: The dorsal approach to the proximal interphalangeal (PIP) joint provides the advantage of improved visualization of the articular surface, while the disadvantage of a dorsal approach is the disruption of the central slip and extensor mechanism requiring a delay in range of motion exercises. A volar approach keeps the central slip and extensor mechanism intact, allowing for early range of motion. The goal of this study was to evaluate patient outcomes of surface replacement (SR) PIP joint arthroplasty performed through a volar approach...
May 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28412103/reverse-shoulder-arthroplasty-compared-with-hemiarthroplasty-in-the-treatment-of-acute-proximal-humeral-fractures
#17
Michael van der Merwe, Matthew J Boyle, Christopher M A Frampton, Craig M Ball
BACKGROUND: Complex proximal humeral fractures may require prosthetic replacement of the humeral head. Surgical options include reverse shoulder arthroplasty (RSA) and shoulder hemiarthroplasty; however, the optimal technique remains controversial. The goal of this study was to compare functional outcomes and revision rates of RSA with hemiarthroplasty in patients with acute proximal humeral fractures. MATERIALS AND METHODS: Between January 1, 1999, and December 31, 2014, there were 218 patients who underwent RSA and 427 who underwent hemiarthroplasty for acute proximal humeral fractures identified through New Zealand Joint Registry records...
April 12, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28410956/nine-year-outcome-after-anatomic-stemless-shoulder-prosthesis-clinical-and-radiologic-results
#18
Nael Hawi, Petra Magosch, Mark Tauber, Sven Lichtenberg, Peter Habermeyer
BACKGROUND: Several stemless shoulder implants are available on the market, but only a few studies have presented results with sufficient mid- to long-term follow-up. The present study evaluated clinical and radiologic outcomes 9 years after anatomic stemless shoulder replacement. METHODS: This is a prospective cohort study evaluating the stemless shoulder prosthesis since 2005. Anatomic stemless shoulder replacement using a single prosthesis was performed in 49 shoulders; 17 underwent total shoulder replacement, and 32 underwent hemiarthroplasty...
April 11, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28410878/efficacy-of-laronidase-therapy-in-patients-with-mucopolysaccharidosis-type-i-who-initiated-enzyme-replacement-therapy-in-adult-age-a-systematic-review-and-meta-analysis
#19
Jordi Pérez-López, Montserrat Morales-Conejo, Mónica López-Rodríguez, Álvaro Hermida-Ameijeiras, Marc Moltó-Abad
BACKGROUND: The efficacy of starting enzyme replacement therapy (ERT) in adults with Muchopolysaccharidosis Type I (MPS-I) is controversial. Evaluating the benefits reported by patients initiating ERT with laronidase at adult age might help physicians decide whether the use of ERT in these patients is worthwhile from a clinical point of view. OBJECTIVE: To assess every effectiveness variable modified in MPS-I patients who initiated laronidase at adult age. METHODS: A systematic search of the literature, from inception to July 2016, was conducted using MEDLINE, EMBASE, CENTRAL and LILACS to identify randomized trials or observational studies including ≥1 MPS-I patients with ERT initiated in adult age (≥18years) and evaluating ERT efficacy...
April 9, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/28405220/intraoperative-complications-during-revision-shoulder-arthroplasty-a-study-using-the-national-joint-registry-dataset
#20
Helen M Ingoe, Philip Holland, Paul Cowling, Lucksy Kottam, Paul N Baker, Amar Rangan
BACKGROUND: The surgical options for revision shoulder arthroplasty and the number of procedures performed are increasing. However, little is known about the risk factors for intraoperative complications associated with this complex surgery. METHODS: The National Joint Registry (NJR) is a surgeon reported database recording information on major joint replacements including revision shoulder arthroplasty. Using multivariable binary logistic regression modelling, we analyzed 1445 revision shoulder arthroplasties reported to the NJR between April 2012 and 2015...
April 2017: Shoulder & Elbow
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