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https://www.readbyqxmd.com/read/29305619/-torsional-malalignment-of-the-humerus
#1
REVIEW
N Hawi, S Razaeian, C Krettek, R Meller, E Liodakis
The torsion of the humerus describes the physiological rotation of the humerus around its longitudinal axis. Various clinical and radiological methods for measurement have been described. The computed tomography method is currently the gold standard. The angle between the humeral head axis and the transepicondylar axis is measured. This angle is called retroversion. Values of retroversion vary between 10° and 40°. For the treatment of many humeral pathologies, a precise reconstruction of the anatomical retroversion is required...
January 5, 2018: Der Unfallchirurg
https://www.readbyqxmd.com/read/29244705/arthroscopic-repair-of-recurrent-posterior-shoulder-subluxation-after-total-shoulder-arthroplasty-a-case-report
#2
Ricardo Grieshaber-Bouyer, Christian Gerber
CASE: A 53-year-old man presented with osteoarthritis (Walch biconcave [B2] glenoid retroversion, 22°; glenohumeral subluxation index, 65%) and a partial rupture of the supraspinatus tendon in the left shoulder. Following anatomic total joint replacement, he developed disabling recurrent posterior subluxation despite a stable prosthesis and a correctly centered glenoid head, as observed with postoperative radiography and computed tomography. In order to avoid bone loss and the complications associated with revision arthroplasty, we performed arthroscopic reefing of the posterior capsule as an experimental minimally invasive treatment...
July 2017: JBJS Case Connector
https://www.readbyqxmd.com/read/29201309/little-leaguer-s-shoulder-can-cause-severe-three-dimensional-humeral-deformity
#3
Yuji Hosokawa, Teruhisa Mihata, Yasuo Itami, Masashi Neo, Munekazu Doi
We analyzed three-dimensional (3D) humeral deformity (valgus-varus, flexion-extension, and rotational deformation) after little leaguer's shoulder using 3D computed tomography in a 15-year-old male baseball player. Humeral retroversion was increased by 27.1° on the dominant side compared with the nondominant side. Compared with the nondominant shaft, the dominant humeral shaft was deformed in the varus direction (9.4°), resulting in a decreased neck-shaft angle (dominant side, 127.5°; nondominant side, 135...
December 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/29155311/glenoid-exposure-in-total-shoulder-arthroplasty
#4
REVIEW
L Nové-Josserand, P Clavert
Glenoid exposure is agreed to be a difficult step, but is also a key step in total shoulder arthroplasty, both anatomic and reverse. It conditions unhindered use of the ancillary instrumentation and thus correct glenoid component positioning. The main stages comprise arthrotomy, by opening the rotator cuff, humeral head cut, and inferior glenohumeral release, enabling shifting of the humerus and good exposure of the glenoid cavity. The two main approaches are deltopectoral and anterosuperior transdeltoid. Using the deltopectoral approach, arthrotomy is performed through the subscapularis muscle, by various techniques...
November 16, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28965996/three-dimensional-assessment-of-the-normal-japanese-glenoid-and-comparison-with-the-normal-french-glenoid
#5
N Mizuno, S Nonaka, R Ozaki, M Yoshida, M Yoneda, G Walch
INTRODUCTION: In 2014, reverse total shoulder arthroplasty was approved in Japan. We were concerned that the base plate might be incompatible with Japanese who were generally smaller than Westerners. Therefore we investigated the dimensions and morphology of the normal Japanese glenoid and compare with the normal French glenoid. MATERIALS AND METHODS: One hundred Japanese shoulders without glenoid lesions (50 men and 50 women) were investigated and compared with 100 French shoulders (50 men and 50 women)...
September 28, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28965687/walch-b0-glenoid-pre-osteoarthritic-posterior-subluxation-of-the-humeral-head
#6
REVIEW
Peter Domos, Caio Santos Checchia, Gilles Walch
The management of primary osteoarthritis of the shoulder has been well investigated. However, the etiology and management of posterior humeral head subluxation in the context of primary glenohumeral osteoarthritis remain controversial. The finding of static posterior subluxation of the humeral head before the development of posterior bone erosion of the glenoid in young men with radiographic findings of primary osteoarthritis has been described as arthrogenic posterior subluxation of the humeral head. It demonstrates the earliest form of the osteoarthritic evolution, and an excessive glenoid retroversion is the only probable cause of this static subluxation, although this is controversial...
September 28, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28948516/version-correction-via-eccentric-reaming-compromises-remaining-bone-quality-in-b2-glenoids-a-computational-study
#7
Xiang Chen, Akhil S Reddy, Andreas Kontaxis, Daniel S Choi, Timothy Wright, David M Dines, Russell F Warren, Julien Berhouet, Lawrence V Gulotta
BACKGROUND: Version correction via eccentric reaming reduces clinically important retroversion in Walch type B2 glenoids (those with substantial glenoid retroversion and a second, sclerotic neoglenoid cavity) before total shoulder arthroplasty (TSA). Clinically, an increased risk of glenoid component loosening in B2 glenoids was hypothesized to be the result of compromised glenoid bone quality attributable to eccentric reaming. However, no established guidelines exist regarding how much version correction can be applied without compromising the quality of glenoid bone...
December 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28927670/patient-specific-instrumentation-for-total-shoulder-arthroplasty-not-as-accurate-as-it-would-seem
#8
Simon C Lau, Prue P A Keith
BACKGROUND: There is an increasing body of literature suggesting that the use of patient-specific instrumentation (PSI) in total shoulder arthroplasty (TSA) results in improved positioning of the glenoid component. The aim of this in vivo study was to assess the accuracy of PSI of the glenoid component in TSA in a consecutive series at a single center. METHODS: Eleven consecutive TSAs (7 TSAs and 4 reverse TSAs) were performed using custom-made patient-specific positioning guides for the glenoid component...
September 15, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28872528/quantitative-measurement-of-osseous-pathology-in-advanced-glenohumeral-osteoarthritis
#9
Joseph P Iannotti, Bong-Jae Jun, Thomas E Patterson, Eric T Ricchetti
BACKGROUND: Osteoarthritis of the glenohumeral joint has typical patterns of deformity as described by Walch et al. However, more severe glenoid pathology may be difficult to classify. The purpose of this study was to use 3-dimensional computed tomography (3-D CT) imaging analysis to define common pathologic subtypes that can be differentiated from the current Walch classification. METHODS: We performed quantitative measurements of premorbid and pathologic anatomy using preoperative 3-D CT scans from 155 cases of advanced glenohumeral osteoarthritis that underwent anatomic or reverse total shoulder arthroplasty...
September 6, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28866848/corr-insights-%C3%A2-does-postoperative-glenoid-retroversion-affect-the-2-year-clinical-and-radiographic-outcomes-for-total-shoulder-arthroplasty
#10
Michael Lawrence Pearl
No abstract text is available yet for this article.
November 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28777216/posterior-shoulder-instability
#11
Alaina Brelin, Jonathan F Dickens
Posterior shoulder instability is a relatively uncommon condition, occurring in ∼10% of those with shoulder instability. Because of the rarity of the condition and the lack of knowledge in treatment, it is often misdiagnosed or patients experience a delay in diagnosis. Posterior instability typically affects athletes participating in contact or overhead sports and is usually the result of repetitive microtrauma or blunt force with the shoulder in the provocative position of flexion, adduction, and internal rotation, leading to recurrent subluxation events...
September 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28762021/retroverted-glenoid-reconstruction-using-glenoid-plate-in-reverse-shoulder-arthroplasty
#12
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/28735842/angled-bio-rsa-bony-increased-offset-reverse-shoulder-arthroplasty-a-solution-for-the-management-glenoid-bone-loss-and-erosion
#13
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/28689828/influence-of-humeral-head-material-on-wear-performance-in-anatomic-shoulder-joint-arthroplasty
#14
Ulrike Mueller, Steffen Braun, Stefan Schroeder, Mark Schroeder, Robert Sonntag, Sebastian Jaeger, Jan Philippe Kretzer
BACKGROUND: The number of total shoulder arthroplasties has increased in the past years, with encouraging results. However, the survival of anatomic total shoulder arthroplasty (aTSA) is lower compared with that of knee and hip replacements. Wear-associated problems like loosening are well-known causes of long-term failure of aTSA. The main purpose of this study was to investigate the wear behavior of ceramic-polyethylene bearings compared with the standard metal-polyethylene bearings...
July 6, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28681354/does-postoperative-glenoid-retroversion-affect-the-2-year-clinical-and-radiographic-outcomes-for-total-shoulder-arthroplasty
#15
Benjamin C Service, Jason E Hsu, Jeremy S Somerson, Stacy M Russ, Frederick A Matsen
BACKGROUND: While glenoid retroversion and posterior humeral head decentering are common preoperative features of severely arthritic glenohumeral joints, the relationship of postoperative glenoid component retroversion to the clinical results of total shoulder arthroplasty (TSA) is unclear. Studies have indicated concern for inferior outcomes when glenoid components are inserted in 15° or more retroversion. QUESTIONS/PURPOSES: In a population of patients undergoing TSA in whom no specific efforts were made to change the version of the glenoid, we asked whether at 2 years after surgery patients having glenoid components implanted in 15° or greater retroversion had (1) less improvement in the Simple Shoulder Test (SST) score and lower SST scores; (2) higher percentages of central peg lucency, higher Lazarus radiolucency grades, higher mean percentages of posterior decentering, and more frequent central peg perforation; or (3) a greater percentage having revision for glenoid component failure compared with patients with glenoid components implanted in less than 15° retroversion...
November 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28663399/prediction-of-the-pre-morbid-3d-anatomy-of-the-proximal-humerus-based-on-statistical-shape-modelling
#16
S Poltaretskyi, J Chaoui, M Mayya, C Hamitouche, M J Bercik, P Boileau, G Walch
AIMS: Restoring the pre-morbid anatomy of the proximal humerus is a goal of anatomical shoulder arthroplasty, but reliance is placed on the surgeon's experience and on anatomical estimations. The purpose of this study was to present a novel method, 'Statistical Shape Modelling', which accurately predicts the pre-morbid proximal humeral anatomy and calculates the 3D geometric parameters needed to restore normal anatomy in patients with severe degenerative osteoarthritis or a fracture of the proximal humerus...
July 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28567227/measurement-methods-for-humeral-retroversion-using-two-dimensional-computed-tomography-scans-which-is-most-concordant-with-the-standard-method
#17
Joo Han Oh, Woo Kim, Angel A Cayetano
BACKGROUND: Humeral retroversion is variable among individuals, and there are several measurement methods. This study was conducted to compare the concordance and reliability between the standard method and 5 other measurement methods on two-dimensional (2D) computed tomography (CT) scans. METHODS: CT scans from 21 patients who underwent shoulder arthroplasty (19 women and 2 men; mean age, 70.1 years [range, 42 to 81 years]) were analyzed. The elbow transepicondylar axis was used as a distal reference...
June 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/28545718/the-effect-of-glenoid-component-version-and-humeral-polyethylene-liner-rotation-on-subluxation-and-impingement-in-reverse-shoulder-arthroplasty
#18
Vijay N Permeswaran, Andrea Caceres, Jessica E Goetz, Donald D Anderson, Carolyn M Hettrich
BACKGROUND: A previously validated finite element modeling approach was used to determine how changes in glenoid component version and polyethylene liner rotation within the humeral component affect the arm abduction angle at which impingement between the inferior glenoid and the polyethylene liner occurs as well as the amount of subluxation generated by that impingement. MATERIALS AND METHODS: Five glenoid component versions (5° anteversion; neutral; 5°, 10°, and 20° retroversion) and 7 polyethylene liner rotations (20° and 10° anterior; neutral; 10°, 20°, 30°, and 40° posterior) were considered, resulting in 35 different clinically representative models...
May 22, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28483434/posterior-glenoid-bone-grafting-in-total-shoulder-arthroplasty-for-osteoarthritis-with-severe-posterior-glenoid-wear
#19
Gregory P Nicholson, Gregory L Cvetanovich, Allison J Rao, Patrick O'Donnell
BACKGROUND: Total shoulder arthroplasty (TSA) in cases with posterior wear can be addressed by eccentric reaming of the anterior glenoid or by augmenting the posterior glenoid with bone grafting or augmented glenoid implants. We report the results of TSA with posterior glenoid bone grafting (PGBG) with humeral head autograft in patients with shoulder osteoarthritis and severe posterior glenoid wear. METHODS: A retrospective review of cases from 2004 to 2014 revealed 34 patients...
May 5, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28444541/reverse-shoulder-arthroplasty-for-massive-irreparable-rotator-cuff-tears-and-cuff-tear-arthropathy-a-systematic-review
#20
REVIEW
S Petrillo, U G Longo, R Papalia, V Denaro
PURPOSE: To report the outcomes and complications of reverse shoulder arthroplasty (RSA) in massive irreparable rotator cuff tears (MIRCT) and cuff tear arthropathy (CTA). METHODS: A systematic review of the literature contained in Medline, Cochrane, EMBASE, Google Scholar and Ovid databases was conducted on May 1, 2016, according to PRISMA guidelines. The key words "reverse total shoulder arthroplasty" or "reverse total shoulder prostheses" with "rotator cuff tears"; "failed rotator cuff surgery"; "massive rotator cuff tears"; "irreparable rotator cuff tears"; "cuff tear arthropathy"; "outcomes"; "complications" were matched...
August 2017: Musculoskeletal Surgery
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