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Reverse arthroplasty

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https://www.readbyqxmd.com/read/28796543/metal-artifact-reduction-for-orthopedic-implants-o-mar-usefulness-in-ct-evaluation-of-reverse-total-shoulder-arthroplasty
#1
Euddeum Shim, Yusuhn Kang, Joong Mo Ahn, Eugene Lee, Joon Woo Lee, Joo Han Oh, Heung Sik Kang
OBJECTIVE: The objective of this study is to evaluate the effect of the metal artifact reduction algorithm for orthopedic implants (O-MAR) on CT image quality for patients with reverse total shoulder arthroplasty (RTSA), with emphasis placed on the evaluation of bone in the vicinity of prostheses. MATERIALS AND METHODS: Sixty-five patients who underwent CT scanning after RTSA were enrolled in the study. Two radiologists analyzed the images reconstructed with filtered back projection (FBP) with or without O-MAR processing...
August 10, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28791445/pre-operative-factors-influence-the-recovery-of-range-of-motion-following-reverse-shoulder-arthroplasty
#2
Philippe Collin, Tetsuya Matsukawa, Patrick J Denard, Solenn Gain, Alexandre Lädermann
INTRODUCTION: Recently the use of reverse shoulder arthroplasty (RSA) has increased because of a clinical perception of durable functional outcome. However, some patients unexpectedly have a poor recovery of range of motion (ROM) after surgery. Objective factors such as initial diagnosis, pre- and intra-operative ROM, deltoid impairment or arm lengthening have previously been associated with anterior forward flexion (AFF). This study sought to determine if subjective pre-operative factors influence the rate and timing of ROM recovery after RSA...
August 8, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28782448/risk-factors-associated-with-intraoperative-complications-in-primary-shoulder-arthroplasty
#3
Paul D Cowling, Philip Holland, Lucksy Kottam, Paul Baker, Amar Rangan
Background and purpose - Increasing numbers of shoulder arthroplasty are performed internationally. The predictors of intraoperative complications when implanting primary shoulder replacements are unknown. We determined the incidence of intraoperative complications during primary shoulder arthroplasty using the National Joint Registry of England, Wales, Northern Ireland and the Isle of Man (NJR), and analyzed the associated risk factors for complications. Patients and methods - NJR data on primary shoulder arthroplasty were scrutinized for intraoperative complications...
August 7, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28782076/shoulder-arthroplasty-in-patients-with-osteo-chondrodysplasias
#4
Bradley Schoch, Jean-David Werthel, Joaquin Sanchez-Sotelo, John W Sperling, Robert H Cofield, Mark Morrey
PURPOSE: Osteo-chondrodysplasias are a rare cause of limb malalignment, deformity and degenerative joint disease. Earlier in life, deformities may be managed with bony realignment and soft tissue releases; however, as degenerative changes progress, arthroplasty may be considered. There are limited reports examining shoulder arthroplasty in this population. This study aims to assess pain relief, function, and re-operation rate of shoulder arthroplasty in patients with osteo-chondrodysplasias...
August 7, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28773112/corrosion-and-tribology-of-materials-used-in-a-novel-reverse-hip-replacement
#5
Linda Braddon, Zafer Termanini, Steven MacDonald, Jay Parvizi, Jay Lieberman, Victor Frankel, Joseph Zuckerman
Total hip arthroplasty has been utilized for the past 50 years as an effective treatment for degenerative, inflammatory and traumatic disorders of the hip. The design of these implants has generally followed the anatomy of the hip as a ball and socket joint with the femoral head representing the ball and the acetabulum representing the socket. We describe a novel hip arthroplasty design in which the "ball" is located on the acetabular side and the "socket" is located on the femoral side. The results of extensive biomechanical testing are described and document wear and corrosion characteristics that are at least equivalent to standard designs...
July 5, 2017: Materials
https://www.readbyqxmd.com/read/28768785/the-effect-of-intravenous-tranexamic-acid-on-blood-loss-and-early-post-operative-pain-in-total-shoulder-arthroplasty
#6
L Pauzenberger, M A Domej, P R Heuberer, M Hexel, A Grieb, B Laky, J Blasl, W Anderl
AIMS: The purpose of the present study was to evaluate the impact of intravenous tranexamic acid on the reduction of blood loss, transfusion rate, and early post-operative clinical outcome in total shoulder arthroplasty. PATIENTS AND METHODS: A randomised, placebo-controlled trial which included 54 patients undergoing unilateral primary stemless anatomical or stemmed reverse total shoulder arthroplasty was undertaken. Patients received either 100 ml saline (placebo, n = 27), or 100 ml saline together with 1000 mg of tranexamic acid (TXA, n = 27) intravenously prior to skin incision and during wound closure...
August 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28763420/patients-with-staged-bilateral-total-joint-arthroplasty-in-registries-immortal-time-bias-and-methodological-options
#7
Stéphanie L van der Pas, Rob G H H Nelissen, Marta Fiocco
BACKGROUND: In arthroplasty data, patients with staged bilateral total joint arthroplasty (TJA) pose a problem in statistical analysis. Subgroup analysis, in which patients with unilateral and bilateral TJA are studied separately, is sometimes considered an appropriate solution to the problem; we aim to show that this is not true because of immortal time bias. METHODS: We reviewed patients who underwent staged (at any time) bilateral TJA. The logical fallacy leading to immortal time bias is explained through a simple artificial data example...
August 2, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28762021/retroverted-glenoid-reconstruction-using-glenoid-plate-in-reverse-shoulder-arthroplasty
#8
R Lanzone, S Carbone, P Albino, J-B Cassio, P Métais
PURPOSE: The objective of this study is to evaluate the clinical and radiological results of reverse shoulder arthroplasty (RSA) with glenoid plating in a consecutive series of patients affected by cuff tear glenohumeral arthropathy with glenoid retroversion >15°. We hypothesized that autologous humeral head graft may be better stabilized between the baseplate and the native glenoid surface with the use of a glenoid plate. METHODS: Twenty consecutive patients affected by cuff tear arthropathy with glenoid retroversion >15° (B2 or C according to Walch classification) were enrolled in this study...
July 31, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28751094/revision-of-failed-shoulder-hemiarthroplasty-to-reverse-total-arthroplasty-analysis-of-157-revision-implants
#9
Giovanni Merolla, Eric Wagner, John W Sperling, Paolo Paladini, Elisabetta Fabbri, Giuseppe Porcellini
BACKGROUND: There remains a paucity of studies examining the conversion of failed hemiarthroplasty (HA) to reverse total shoulder arthroplasty (RTSA). Therefore, the purpose of this study was to examine a large series of revision HA to RTSA. METHODS: A population of 157 patients who underwent conversion of a failed HA to a revision RTSA from 2006 through 2014 were included. The mean follow-up was 49 months (range, 24-121 months). The indications for revision surgery included instability with rotator cuff insufficiency (n = 127) and glenoid wear (n = 30); instability and glenoid wear were associated in 38 cases...
July 24, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28751093/two-stage-reimplantation-for-the-treatment-of-deep-infection-after-shoulder-arthroplasty
#10
Andrew T Assenmacher, Eduard Alentorn-Geli, Taylor Dennison, Yaser M K Baghdadi, Robert H Cofield, Joaquín Sánchez-Sotelo, John W Sperling
BACKGROUND: Two-stage reimplantation is the most common treatment modality considered for periprosthetic shoulder infection (PSI). Most studies to date have reported on a relatively small number of shoulders. The purpose of this study was to determine the outcome of 2-stage reimplantation for PSI in terms of both eradication of infection and restoration of function. METHODS: Between 1980 and 2010, 40 shoulders (39 patients) underwent a 2-stage reimplantation for PSI; 35 shoulders (34 patients) met inclusion criteria (10 hemiarthroplasties, 24 anatomic total shoulder arthroplasties, 1 reverse total shoulder arthroplasty)...
July 24, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28748362/case-study-failure-of-superior-capsular-reconstruction-using-dermal-allograft
#11
J Zerr, J D McDermott, N M Beckmann, R K Fullick, A Chhabra
Superior capsular reconstruction (SCR) is a novel technique for treating irreparable rotator cuff tears in younger patients in whom a reverse total shoulder arthroplasty is not the optimal treatment choice. This case study describes a middle-aged male with a recurrent, massive, irreparable rotator cuff tear treated with SCR that subsequently failed at the glenoid attachment. The patient underwent successful arthroscopic revision of the SCR. The case illustrates the MRI and arthroscopic correlations of the failed dermal allograft reconstruction, which to our knowledge has not been previously shown in the radiology literature...
July 26, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28747277/glenosphere-size-in-reverse-shoulder-arthroplasty-is-larger-better-for-external-rotation-and-abduction-strength
#12
Andreas M Müller, Marian Born, Christian Jung, Matthias Flury, Christoph Kolling, Hans-Kaspar Schwyzer, Laurent Audigé
BACKGROUND: The role of glenosphere size in reverse shoulder arthroplasty (RSA) may be important in prosthetic stability, joint kinematics, rotator cuff tension and excursion, scapular impingement, humeral lateralization, deltoid wrap, and the occurrence of "notching." This study compared short- and midterm clinical and radiographic outcomes for 2 different glenosphere sizes of a single RSA type with respect to implant positioning, glenoid size, and morphology. METHODS: This retrospective analysis included 68 RSA procedures that were prospectively documented in a local register during a 5-year postoperative period...
July 24, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28736908/bmp-7-ameliorates-cobalt-alloy-particle-induced-inflammation-by-suppressing-th17-responses
#13
Fengrong Chen, Ruisong Chen, Haoyuan Liu, Rupeng Sun, Jianming Huang, Zheyuan Huang, Guojian Jian
Metal wear debris has been shown to activate an aseptic osteolytic process that causes failure in total joint arthroplasty (TJA). This osteolysis is characterized by a proinflammatory, self-propagating immune response involving primarily macrophages, dendritic cells, and activated osteoclasts, as well as T cells and B cells. The human bone morphogenic protein (BMP)-7, on the other hand, was shown to promote osteoblast survival, and reversed the downregulation of anabolic Smad proteins and Runx2 following cobalt injury...
July 24, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28735843/does-arm-lengthening-affect-the-functional-outcome-in-onlay-reverse-shoulder-arthroplasty
#14
Birgit S Werner, Francesco Ascione, Giulia Bugelli, Gilles Walch
BACKGROUND: The concept of onlay design reverse shoulder arthroplasty has been introduced to overcome complications observed with the traditional Grammont-type prosthesis. The aim of this study was to determine the influence of arm lengthening on the short-term clinical outcome in onlay reverse shoulder arthroplasty and investigate the effect of humeral tray offset positioning on arm lengthening and range of motion. METHODS: We retrospectively evaluated 56 patients undergoing reverse shoulder arthroplasty with the Aequalis Ascend Flex prosthesis (Tornier, Bloomington, MN, USA) at a minimum 2 years' follow-up...
July 20, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28735842/angled-bio-rsa-bony-increased-offset-reverse-shoulder-arthroplasty-a-solution-for-the-management-glenoid-bone-loss-and-erosion
#15
Pascal Boileau, Nicolas Morin-Salvo, Marc-Olivier Gauci, Brian L Seeto, Peter N Chalmers, Nicolas Holzer, Gilles Walch
BACKGROUND: Glenoid deficiency and erosion (excessive retroversion/inclination) must be corrected in reverse shoulder arthroplasty (RSA) to avoid prosthetic notching or instability and to maximize function, range of motion, and prosthesis longevity. This study reports the results of RSA with an angled, autologous glenoid graft harvested from the humerus (angled BIO-RSA). METHODS: A trapezoidal bone graft, harvested from the humerus and fixed with a long-post baseplate and screws, was used to compensate for residual glenoid bone loss/erosion...
July 20, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28735841/the-perioperative-effects-of-chronic-preoperative-opioid-use-on-shoulder-arthroplasty-outcomes
#16
Jonathan W Cheah, David C Sing, Dell McLaughlin, Brian T Feeley, C Benjamin Ma, Alan L Zhang
HYPOTHESIS AND BACKGROUND: Chronic opioid therapy is an increasingly used modality for the treatment of osteoarthritis-associated pain. We hypothesized that chronic opioid use would be associated with adverse outcomes in shoulder arthroplasty. METHODS: A retrospective analysis of patients undergoing elective anatomic total shoulder arthroplasty (TSA) and reverse total shoulder arthroplasty (rTSA) at a single institution from 2012-2015 was performed. Patients were stratified by preoperative opioid use (nonusers, short-acting opioid users, and long-acting opioid users), and their postoperative clinical outcomes were assessed...
July 20, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28730322/orthopaedic-surgeons-opinions-surrounding-the-management-of-proximal-humerus-fractures-an-international-survey
#17
Lauren L Nowak, Milena R Vicente, Michael D McKee, Jeremy A Hall, Aaron Nauth, Emil H Schemitsch
PURPOSE: The purpose of this study was to survey surgeons' preferences surrounding the management and evaluation of proximal humerus fractures internationally. METHODS: A questionnaire was developed using previous literature and input from practicing orthopaedic surgeon opinion leaders. Between November 13, 2014 and December 31, 2014, the questionnaire was posted on the membership section of three major orthopaedic and shoulder surgery association websites. Survey responses were anonymous...
July 20, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28719752/return-to-sport-after-shoulder-arthroplasty-in-recreational-athletes-a-systematic-review-and-meta-analysis
#18
Florence Aim, Jean-David Werthel, Julien Deranlot, Marie Vigan, Geoffroy Nourissat
BACKGROUND: One of the most frequent demands from patients after shoulder replacement surgery is to return to sport. PURPOSE: To determine the rate of return to sport after shoulder arthroplasty (total shoulder arthroplasty, reverse shoulder arthroplasty, hemiarthroplasty) in recreational athletes. STUDY DESIGN: Meta-analysis and systematic review. METHODS: The PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines were followed to perform this systematic review and meta-analysis of the results in the literature as well as the presentation of results...
July 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28711169/the-risk-of-suprascapular-and-axillary-nerve-injury-in-reverse-total-shoulder-arthroplasty-an-anatomic-study
#19
Tim Leschinger, Michael Hackl, Eduard Buess, Sebastian Lappen, Martin Scaal, Lars Peter Müller, Kilian Wegmann
PURPOSE: Implantation of a reverse total shoulder arthroplasty (rTSA) places the axillary and suprascapular nerves at risk. The aim of this anatomic study was to digitally analyse the location of these nerves in relation to bony landmarks in order to predict their path and thereby help to reduce the risk of neurological complications during the procedure. METHODS: A total of 22 human cadaveric shoulder specimens were used in this study. The axillary and suprascapular nerves were dissected, and radiopaque threads were sutured onto the nerves without mobilizing the nerves from their native paths...
June 28, 2017: Injury
https://www.readbyqxmd.com/read/28705693/erratum-to-clinical-outcome-of-reverse-total-shoulder-arthroplasty-combined-with-latissimus-dorsi-transfer-for-the-treatment-of-chronic-combined-pseudoparesis-of-elevation-and-external-rotation-of-the-shoulder-j-shoulder-elbow-surg-2014-23-49-57
#20
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