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Shoulder retroversion

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https://www.readbyqxmd.com/read/28190569/analyzing-on-the-location-of-the-bicipital-groove-for-alignment-in-shoulder-arthroplasty-of-chinese
#1
Jian Zhou, Linlin Zhang, Ling Shen, Ming Zhu, Feng Zheng
BACKGROUND: Many anthropometric studies of the normal glenohumeral relationship have been performed for the implant design and to identify reference points for the correct placement of the prosthesis in glenohumeral joint replacement. However, whether those implantation marks, which adopted from European or American, can achieve the same precision to Eastern Asian, specifically Chinese is still unknown. MATERIALS AND METHODS: One hundred eighty healthy were scanned using CT...
February 9, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28167247/results-and-limitations-of-humeral-head-resurfacing-105-cases-at-a-mean-follow-up-of-5-years
#2
K Soudy, C Szymanski, C Lalanne, C Bourgault, A Thiounn, A Cotten, C Maynou
BACKGROUND: The objective of this study was to assess clinical and computed-tomography (CT) outcomes at least 2 years after humeral head resurfacing to treat concentric gleno-humeral osteoarthritis. HYPOTHESIS: Humeral head resurfacing provides similar outcomes to those achieved with stemmed humeral head implants. MATERIALS AND METHODS: This single-centre retrospective studyincluded 40 Copeland™ and 65 Aequalis™ humeral resurfacing heads implanted between 2004 and 2012...
February 3, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28162884/the-influence-of-three-dimensional-planning-on-decision-making-in-total-shoulder-arthroplasty
#3
Birgit S Werner, Robert Hudek, Klaus J Burkhart, Frank Gohlke
BACKGROUND: Long-term results and complication rates in shoulder arthroplasty are related to implant positioning. Current literature reports increased precision in glenoid component positioning using 3-dimensional (3D) computed tomography (CT) planning tools. This study evaluated the accuracy of glenoid version and inclination measurements using 2D CT scans compared with a validated 3D software program and its influence on decision making on implant selection. METHODS: Preoperative CT scans were obtained from 50 patients undergoing total shoulder arthroplasty...
February 2, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28162883/posterior-open-wedge-osteotomy-of-the-scapula-neck-for-the-treatment-of-advanced-shoulder-osteoarthritis-with-posterior-head-migration-in-young-patients
#4
Reinhold Ortmaier, Philipp Moroder, Corinna Hirzinger, Herbert Resch
BACKGROUND: Treatment of young, active patients with symptomatic glenohumeral osteoarthritis, excessive glenoid retroversion, and static posterior humeral subluxation is challenging. Correction of glenoid retroversion may lead to centric loading and perhaps recenter the humeral head. We describe the functional and radiologic outcomes after corrective osteotomy of the glenoid in this population of patients. MATERIALS AND METHODS: In this retrospective study, we included 10 shoulders (8 patients) that were observed for a mean of 33...
February 2, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28162877/humeral-version-in-reverse-shoulder-arthroplasty-affects-impingement-in-activities-of-daily-living
#5
Andreas Kontaxis, Xiang Chen, Julien Berhouet, Daniel Choi, Timothy Wright, David M Dines, Russell F Warren, Lawrence V Gulotta
BACKGROUND: Impingement after reverse shoulder arthroplasty (RSA) has been correlated with implant design and surgical techniques. Previous studies suggested that humeral retroversion can reduce impingement and increase external rotation range of motion (ROM). The purpose of this study was to determine how humeral version affects impingement in activities of daily living (ADLs). MATERIALS AND METHODS: A single surgeon performed virtual RSA on 30 arthritic shoulders that were reconstructed from preoperative computed tomography scans...
February 2, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28159312/effects-of-anterior-offsetting-of-humeral-head-component-in-posteriorly-unstable-total-shoulder-arthroplasty-finite-element-modeling-of-cadaver-specimens
#6
Gregory S Lewis, William K Conaway, Hwabok Wee, H Mike Kim
A novel technique of "anterior offsetting" of the humeral head component to address posterior instability in total shoulder arthroplasty has been proposed, and its biomechanical benefits have been previously demonstrated experimentally. The present study sought to characterize the changes in joint mechanics associated with anterior offsetting with various amounts of glenoid retroversion using cadaver specimen-specific 3-dimensional finite element models. Specimen-specific computational finite element models were developed through importing digitized locations of six musculotendinous units of the rotator cuff and deltoid muscles based off three cadaveric shoulder specimens implanted with total shoulder arthroplasty in either anatomic or anterior humeral head offset...
January 18, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28131692/radiographic-characterization-of-the-b2-glenoid-is-inclusion-of-the-entirety-of-the-scapula-necessary
#7
Peter N Chalmers, Dane Salazar, Aaron Chamberlain, Jay D Keener
BACKGROUND: Computed tomography (CT) scans are often obtained before total shoulder arthroplasty to assess glenoid deformity. To allow correction of the slice axis into the plane of the scapula, these scans have typically required inclusion of the entirety of the scapula. The purpose of this study was to determine whether inclusion of the medial border and inferior angle is necessary for accurate measurement of scapular version, inclination, and humeral subluxation. METHODS: Fourteen CT scans in preoperative total shoulder arthroplasty patients with Walch B2 type glenoids underwent a standardized measurement protocol...
January 25, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28131683/differences-in-humeral-retroversion-in-dominant-and-nondominant-sides-of-young-baseball-players
#8
Daisuke Kurokawa, Nobuyuki Yamamoto, Hiroaki Ishikawa, Hideaki Nagamoto, Hiroyuki Takahashi, Takayuki Muraki, Minoru Tanaka, Katsumi Sato, Eiji Itoi
BACKGROUND: The relationship between the disabled throwing shoulder and humeral retroversion has recently attracted a great deal of attention. However, none of the previous studies clarified when the side-to-side difference of humeral retroversion in young baseball players would start. This study aimed to clarify when the difference of humeral retroversion in the dominant and nondominant sides appeared in baseball players. METHODS: The bicipital-forearm angle in bilateral shoulders of 172 elementary school baseball players was measured by ultrasound...
January 25, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28112785/effect-of-humeral-component-version-on-outcomes-in-reverse-shoulder-arthroplasty
#9
Alexander W Aleem, Brian T Feeley, Luke S Austin, C Benjamin Ma, Ryan J Krupp, Matthew L Ramsey, Charles L Getz
Although reverse shoulder arthroplasty provides excellent clinical results in appropriately selected patients, loss of external and internal rotation may occur. Component selection, design, and placement affect postoperative results. Recent studies considered the effect of humeral component version on functional results. The current study investigated whether humeral stem retroversion affects the outcomes of reverse shoulder arthroplasty with a retrospective review of a multisurgeon, industry-sponsored, prospectively gathered database of a single reverse shoulder arthroplasty implant...
January 20, 2017: Orthopedics
https://www.readbyqxmd.com/read/28088244/study-of-the-variability-of-scapular-inclination-and-the-glenoid-version-considerations-for-preoperative-planning-clinical-radiological-study
#10
Petr Fulin, Martin Kysilko, David Pokorny, Radek Padr, Nikola Kasprikova, Ivan Landor, Antonin Sosna
BACKGROUND: Preoperative planning with the aid of imaging methods is a principal factor in successful surgery on the shoulder. This work aims to evaluate the variability of glenoid version, spiralling twist and scapular inclination in relation to the frontal axis. Studies focusing on measuring the variability of scapular inclination in the standardised rest position are lacking in the literature. METHODS: We evaluated 104 CT scans of the shoulder. We measured the glenoid version with respect to the scapular axis at three levels...
January 14, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28071815/effect-of-glenohumeral-elevation-on-subacromial-supraspinatus-compression-risk-during-simulated-reaching
#11
Rebekah L Lawrence, Dustin M Schlangen, Katelyn A Schneider, Jonathan Schoenecker, Andrea L Senger, William C Starr, Justin L Staker, Jutta M Ellermann, Jonathan P Braman, Paula M Ludewig
Mechanical subacromial rotator cuff compression is one theoretical mechanism in the pathogenesis of rotator cuff disease. However, the relationship between shoulder kinematics and mechanical subacromial rotator cuff compression across the range of humeral elevation motion is not well understood. The purpose of this study was to investigate the effect of humeral elevation on subacromial compression risk of the supraspinatus during a simulated functional reaching task. Three-dimensional anatomical models were reconstructed from shoulder magnetic resonance images acquired from 20 subjects (10 asymptomatic, 10 symptomatic)...
January 10, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28068966/glenoid-morphology-in-light-of-anatomical-and-reverse-total-shoulder-arthroplasty-a-dissection-and-3d-ct-based-study-in-male-and-female-body-donors
#12
Sandra Mathews, Marco Burkhard, Nabil Serrano, Karl Link, Martin Häusler, Nakita Frater, Ingeborg Franke, Helena Bischofberger, Florian M Buck, Dominic Gascho, Michael Thali, Steffen Serowy, Magdalena Müller-Gerbl, Gareth Harper, Ford Qureshi, Thomas Böni, Hans-Rudolf Bloch, Oliver Ullrich, Frank-Jakobus Rühli, Elisabeth Eppler
BACKGROUND: Placement of the glenoid baseplate is of paramount importance for the outcome of anatomical and reverse total shoulder arthroplasty. However, the database around glenoid size is poor, particularly regarding small scapulae, for example, in women and smaller individuals, and is derived from different methodological approaches. In this multimodality cadaver study, we systematically examined the glenoid using morphological and 3D-CT measurements. METHODS: Measurements of the glenoid and drill hole tunnel length for superior baseplate screw placement were recorded to define size of the glenoid and the distance to the scapular notch on cadaveric specimens...
January 10, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28002370/distinct-proximal-humeral-geometry-in-chinese-population-and-clinical-relevance
#13
Qiang Zhang, Lewis L Shi, Krishna C Ravella, Jason L Koh, Shaobai Wang, Cailong Liu, Guoan Li, Jianhua Wang
BACKGROUND: Replicating humeral anatomy during shoulder arthroplasty is important for good patient outcomes. The proximal humeral geometry of the Chinese population has been rarely reported. We analyzed the geometry of the proximal part of the humerus in Chinese subjects and compared it with that of Western populations and the dimensions of available prostheses. METHODS: Eighty healthy Chinese subjects underwent computed tomography (CT)-arthrography. Three-dimensional (3D) digital humeral and glenoid models were reconstructed, and geometric parameters were measured...
December 21, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/27926680/humeral-retroversion-in-children-with-shoulder-internal-rotation-contractures-secondary-to-upper-trunk-neonatal-brachial-plexus-palsy
#14
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/27915404/is-there-any-influence-of-humeral-component-retroversion-on-range-of-motion-and-clinical-outcome-in-reverse-shoulder-arthroplasty-a-clinical-study
#15
F A de Boer, P M van Kampen, P E Huijsmans
PURPOSE: Reverse shoulder arthroplasty becomes more widely used as treatment for patients with complex cuff arthropathy. Theoretically, a higher retroversion of the humeral component leads to an increase in external rotation ROM and a decrease in internal rotation ROM. There is no consensus in optimal retroversion orientation. We retrospectively describe the effect of retroversion of the humeral component. We hypothesize that 20° humeral retroversion improves postoperative ROM, strength or clinical outcome scores compared to neutral retroversion...
December 3, 2016: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/27914847/the-three-dimensional-glenohumeral-subluxation-index-in-primary-osteoarthritis-of-the-shoulder
#16
Matthijs Jacxsens, Alexander Van Tongel, Heath B Henninger, Robert Z Tashjian, Lieven De Wilde
BACKGROUND: Assessment of glenohumeral subluxation is essential in preoperative planning of total shoulder arthroplasty. The purpose of this study was to evaluate a 3-dimensional (3D) glenohumeral subluxation index (GHSI) in shoulders with primary osteoarthritis (OA) and its relationship with morbid glenoid retroversion. METHODS: The 3D computed tomography reconstructions of 120 healthy shoulders and 110 shoulders with primary glenohumeral arthritis (OA group), classified according to Walch's glenoid morphology, were analyzed...
November 30, 2016: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/27858087/three-dimensional-analysis-of-the-proximal-humeral-and-glenoid-geometry-using-microscribe-3d-digitizer
#17
Wejdan H Owaydhah, Mohammad A Alobaidy, Abdulrahman S Alraddadi, Roger W Soames
PURPOSE: To understand the geometry of the proximal humerus and glenoid fossa to facilitate the design of components used in shoulder arthroplasty. The aim is to evaluate the geometry of the proximal humerus and glenoid fossa and their relationship using a MicroScribe 3D digitizer. METHODS: Scans and measurements were obtained from 20 pairs of dry proximal humeri and scapulae [10 female and 10 male cadavers: median age 81 years (range 70-94 years)] using a MicroScribe 3D digitizer and Rhinoceros software...
November 17, 2016: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/27855874/the-importance-of-glenoid-version-in-patients-with-anterior-dislocation-of-the-shoulder
#18
Ümit Aygün, Yalkın Çalik, Cengiz Işik, Hilal Şahin, Rula Şahin, Derya Öktem Aygün
BACKGROUND: Although increased retroversion of the glenoid has been shown to be an important factor in posterior instability of the shoulder, there are few studies reporting glenoid bone structure as a risk factor in anterior dislocation of the shoulder. This study aimed to compare glenoid version in patients with anterior dislocation of the shoulder and individuals in a control group with no shoulder problems before undergoing computed tomography and to assess a possible relationship between demographic characteristics and glenoid version angle...
December 2016: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/27766274/the-relationship-between-humeral-retrotorsion-and-shoulder-range-of-motion-in-baseball-players-with-an-ulnar-collateral-ligament-tear
#19
Bobby Jean S Lee, J Craig Garrison, John E Conway, Kalyssa Pollard, Subhash Aryal
BACKGROUND: Humeral retrotorsion has been investigated in relation to shoulder range of motion (ROM) in healthy baseball players. Currently, there is limited information on the osseous anatomy and development of ulnar collateral ligament (UCL) tears. PURPOSE: To determine the relationship between humeral retrotorsion and shoulder ROM in baseball players with a UCL tear. STUDY DESIGN: Cross-sectional study; Level of evidence, 3. METHODS: Fifty-four baseball players (mean age, 18...
October 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27765502/generic-targeting-guides-place-revision-glenoid-components-in-more-anatomic-version-than-traditional-techniques
#20
Ryan P Mulligan, Frederick M Azar, Thomas W Throckmorton
BACKGROUND: Glenoid component positioning in revision shoulder arthroplasty is difficult because of distorted anatomic landmarks and scarring in and around the glenoid vault. This study compared glenoid component version in revision total shoulder arthroplasty (TSA) and reverse TSA (RTSA) using traditional instrumentation vs. a generic glenoid targeting guide. METHODS: Radiographs of 50 shoulders undergoing revision arthroplasty were reviewed by an independent reviewer...
October 17, 2016: Journal of Shoulder and Elbow Surgery
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