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Shoulder retroversion

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
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
Thomas Suter, Christopher W Kolz, Robert Z Tashjian, Heath B Henninger, Ariane Gerber Popp
BACKGROUND: The best chance that a shoulder arthroplasty will restore motion and muscle balance across the glenohumeral joint is by closely replicating natural articular morphology. Defining the humeral osteotomy plane along clear landmarks at the anatomic neck is critical. We hypothesized that a new osteotomy, based on alternative landmarks on the anatomic neck, would restore 3-dimensional humeral head morphology more reliably than the traditional osteotomy. METHODS: The anatomic neck was digitized in 30 human cadaver shoulders and compared with its 3-dimensional computed tomography reconstruction...
October 6, 2016: Journal of Shoulder and Elbow Surgery
J Christoph Katthagen, Dimitri S Tahal, Scott R Montgomery, Marilee P Horan, Peter J Millett
PURPOSE: To compare glenoid retroversion and functional outcomes between patients with traumatic onset of posterior shoulder instability (PSI) and patients with atraumatic onset of PSI. METHODS: Patients with PSI who underwent arthroscopic posterior capsulolabral anchor repair, were active in sports, and had undergone surgery a minimum of 2 years earlier were included. Traumatic onset was defined as PSI that occurred after a trauma with the shoulder in adduction, flexion, and internal rotation in patients with no history of instability...
October 4, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
Christelle Pons, Dinomais Mickael, Franck Fitoussi, Marie-Charlotte D'Anjou, Mélanie Porte, Emilie Rumilly, Nathaly Quintero, Philippe Violas, Sylvain Brochard
OBJECTIVE: In children with obstetrical brachial plexus palsy (OBPP), shoulder musculoskeletal deformity is the main cause of morbidity, with a loss of range of shoulder motion, pain and a reduction in social participation. Some uncontrolled studies show that early injections of botulinum toxin (BTI) in the internal shoulder rotator muscles (which cause the deformity) are one of the most promising treatments for the prevention of bony deformity. The main objective of this study will be the evaluation of the effectiveness of BTI in the internal shoulder rotator muscles at the age of 6 months in preventing an increase in posterior subluxation of the glenohumeral joint in babies with OBPP (evaluated at the ages of 5 and 12 months), compared with a placebo...
September 2016: Annals of Physical and Rehabilitation Medicine
Stephen A Parada, Josef K Eichinger, Guillaume D Dumont, Lauren E Burton, Maggie S Coats-Thomas, Stephen D Daniels, Nathan J Sinz, Matthew T Provencher, Laurence D Higgins, Jon J P Warner
PURPOSE: To evaluate glenoid version and humeral subluxation on preoperative multiplanar imaging of patients who underwent surgery for posterior glenohumeral instability compared with a matched group of patients who had shoulder surgery for other pathology. METHODS: All patients over a 2-year period who underwent surgery for posterior instability had preoperative magnetic resonance (MR) imaging or MR arthrogram reviewed. Patients undergoing shoulder surgery for reasons other than instability were identified as a control group and matched by sex, laterality, and age...
September 3, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
Peter N Chalmers, Dane Salazar, Aaron Chamberlain, Jay D Keener
BACKGROUND: Glenoid retroversion may accelerate glenoid loosening after total shoulder arthroplasty. Accurate measurement of preoperative glenoid deformity is critical for decision-making and prognostication. The purpose of this study was to determine whether glenoid version, inclination, and depth and humeral subluxation measurements on computed tomography (CT) scan slices oriented in the plane of the body differ from those oriented in the scapular plane and those obtained by automated 3-dimensional reconstruction software in the setting of a biconcave B2-type glenoid...
August 31, 2016: Journal of Shoulder and Elbow Surgery
Chihiro Nakase, Teruhisa Mihata, Yasuo Itami, Atsushi Takeda, Masashi Neo
BACKGROUND: Humeral retroversion physiologically decreases during growth. However, in throwing athletes, the external forces caused by repetitive throwing are thought to increase humeral retroversion on the dominant side compared with that on the nondominant side. PURPOSE: To investigate the correlation between humeral retroversion and length of baseball career before age 16 years. STUDY DESIGN: Cross-sectional study; Level of evidence, 3...
September 2016: American Journal of Sports Medicine
Nai-Feng Zhu, Bi-Yu Rui, Yun-Long Zhang, Yun-Feng Chen
BACKGROUND: There has been a trend to reconstruct the coracoclavicular (CC) ligaments anatomically for management of acromioclavicular (AC) joint dislocations. PURPOSE: The aim of this study was to determine the location and orientation of the CC ligaments for anatomic reconstruction of the AC joint. METHODS: The subjects were a total of 40 shoulders from 20 Chinese cadavers. Two K-wires were drilled through the insertion center of the conoid and trapezoid ligaments respectively...
August 27, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
Joseph W Galvin, Stephen A Parada, Xinning Li, Josef K Eichinger
BACKGROUND: Posterior shoulder instability is less common and potentially more difficult to diagnose clinically and radiographically compared with anterior shoulder instability. Radiographic findings including posterior labral tears, increased retroversion, presence of glenoid dysplasia, and increased capsular area are associated with symptomatic recurrent posterior shoulder instability. PURPOSE: This study aimed to determine the prevalence and severity of associated radiographic parameters found on magnetic resonance arthrograms (MRAs) in patients with arthroscopically confirmed isolated posterior labral tears and symptomatic recurrent posterior shoulder instability, compared with an age-matched cohort of patients without posterior instability or labral injury confirmed with shoulder arthroscopy...
August 15, 2016: American Journal of Sports Medicine
Josef K Eichinger, Daniel F Massimini, Jungryul Kim, Laurence D Higgins
BACKGROUND: Abnormal glenoid version is a risk factor for shoulder instability. However, the degree to which the variance in version (both anteversion and retroversion) affects one's predisposition for instability is not well understood. PURPOSE: To determine the influence of glenoid version on anterior shoulder joint stability and to determine if the direction of the humeral head dislocation is a stimulus for the development of Hill-Sachs lesions. STUDY DESIGN: Controlled laboratory study...
August 5, 2016: American Journal of Sports Medicine
Francisco Abaete Chagas-Neto, Vitor Faeda Dalto, Michel Daoud Crema, Peter M Waters, Everaldo Gregio-Junior, Nilton Mazzer, Marcello Henrique Nogueira-Barbosa
OBJECTIVE: To assess imaging parameters related to the morphology of the glenohumeral joint in children with unilateral brachial plexus birth palsy (BPBP), in comparison with those obtained for healthy shoulders. MATERIALS AND METHODS: We conducted a retrospective search for cases of unilateral BPBP diagnosed at our facility. Only patients with a clinical diagnosis of unilateral BPBP were included, and the final study sample consisted of 10 consecutive patients who were assessed with cross-sectional imaging...
May 2016: Radiologia Brasileira
J Pogorzelski, S Braun, A B Imhoff, K Beitzel
OBJECTIVE: Treatment of posterior shoulder instability with increased retroversion of the glenoid using open-wedge osteotomy of the glenoid neck stabilized with an autologous bone block. INDICATIONS: Symptomatic, atraumatic posterior shoulder instability with increased retroversion (>20°) of the glenoid and previously failed conservative or surgical treatment. CONTRAINDICATIONS: General contraindications against surgery. Relative contraindications: osteoporosis, nicotine abuse, or suspected patient noncompliance...
June 29, 2016: Operative Orthopädie und Traumatologie
Michael D Hendel, Brian C Werner, Christopher L Camp, Lawrence V Gulotta, Gilles Walch, David M Dines, Joshua S Dines
Reconstruction of the biconcave (B2) glenoid presents a challenging clinical problem that has been associated with poor clinical outcomes and implant survivorship. The high failure rate from glenoid component loosening and subsequent premature implant failure can be substantially decreased with accurate glenoid component positioning and appropriate correction of the pathologic glenoid retroversion. Careful preoperative planning is essential for accurate preparation and execution of the optimal surgical plan...
May 2016: American Journal of Orthopedics
D J Lombardo, J Khan, B Prey, L Zhang, G R Petersen-Fitts, V J Sabesan
PURPOSE: Eccentric posterior bone loss and associated glenoid retroversion represent challenges to glenoid placement during total shoulder arthroplasty. This bone loss can lead to poor stability and perforation of the glenoid during arthroplasty. The purpose of this study was to evaluate the morphology of glenoid bone loss for a spectrum of osteoarthritis patients using 3D computed tomography imaging and simulation software. METHODS: This study included 29 patients with glenohumeral osteoarthritis treated with shoulder arthroplasty...
June 3, 2016: Musculoskeletal Surgery
Paul J Favorito, Robert J Freed, Angela M Passanise, Maggie Jane Brown
BACKGROUND: Posterior glenoid bone loss is commonly encountered in total shoulder arthroplasty (TSA). The purpose of our study is to report the clinical and radiographic findings of patients with a minimum of 2 years' follow-up treated with an all-polyethylene, augmented glenoid component. METHODS: Twenty-two shoulders with posterior glenoid bone loss were treated by a single surgeon. All underwent primary TSA using a posteriorly augmented, all-polyethylene, stepped glenoid component...
October 2016: Journal of Shoulder and Elbow Surgery
Nathan G Everding, Jonathan C Levy, Nathan T Formaini, Sara Blum, Carlos C Gil, Kevin Verde
PURPOSE: Glenoid component loosening remains a common mode of failure for total shoulder arthroplasty and has inspired improvements in implant design, instrumentation, and surgical technique. The purpose of this manuscript was to evaluate the incidence of radiolucent lines and glenoid seating on initial postoperative radiographs using a modern pegged-glenoid design, instrumentation, and surgical technique. MATERIALS AND METHODS: We performed a retrospective analysis of a consecutive series of 100 pegged-glenoid total shoulder replacements...
April 2016: International Journal of Shoulder Surgery
Yasuo Itami, Teruhisa Mihata, Koji Shibano, Kazuomi Sugamoto, Masashi Neo
BACKGROUND: Humeral retroversion in baseball players is greater in the dominant shoulder than in the nondominant shoulder. However, the site and severity of the humeral rotational deformity remain unclear. PURPOSE: To evaluate the site of side-to-side differences in humeral retroversion in baseball players and the severity of these changes through 3-dimensional computed tomographic (3D CT) bone models. STUDY DESIGN: Cross-sectional study; Level of evidence, 3...
July 2016: American Journal of Sports Medicine
Benjamin Bockmann, Sonja Soschynski, Philipp Lechler, Tim Schwarting, Florian Debus, Bogdan Soca, Steffen Ruchholtz, Michael Frink
BACKGROUND: A precise understanding of glenohumeral anatomy is required to optimize preoperative planning in shoulder joint arthroplasty, which is difficult in the presence of degenerative disease. In unilateral disease, the contralateral shoulder can be used as a representation of normal anatomy; however, intrasubject differences in shoulder morphology have not been investigated. METHODS: A retrospective study of all patients aged >65 years who received whole body computed tomography at our trauma center from 2010 through 2014 was conducted...
August 2016: Journal of Shoulder and Elbow Surgery
Hristo Ivanov Piponov, David Savin, Neal Shah, Domenic Esposito, Brian Schwartz, Vincent Moretti, Benjamin Goldberg
INTRODUCTION: Variations in glenoid morphology among patients of different gender, body habitus, and ethnicity have been of interest for surgeons. Understanding these anatomical variations is a critical step in restoring normal glenohumeral structure during shoulder reconstruction surgery. METHODS: Retrospective review of 108 patient shoulder CT scans was performed and glenoid version, AP diameter and height were measured. Statistical multiple regression models were used to investigate the ability of gender and ethnicity to predict glenoid AP diameter, height, and version independently of patient weight and height...
April 22, 2016: International Orthopaedics
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