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https://www.readbyqxmd.com/read/29786625/differences-in-glenohumeral-joint-rotation-and-peak-power-output-between-super-league-and-championship-rugby-league-players
#1
Matthew R Haines
Haines, MR. Differences in glenohumeral joint rotation and peak power output between Super League and Championship Rugby League players. J Strength Cond Res 32(6): 1685-1691, 2018-Rugby league is a high-intensity sport with large impact forces sustained during play, resulting in high prevalence of shoulder injury. Consequently, shoulder strength and player power are important considerations for injury prevention and performance. Additionally, professional teams regularly compete against semiprofessional teams, where differences in physical conditioning could be marked...
June 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29784595/comparative-proteome-analysis-of-the-capsule-from-patients-with-frozen-shoulder
#2
Yoshihiro Hagiwara, Masaru Mori, Kenji Kanazawa, Akira Ando, Yutaka Yabe, Masashi Koide, Takuya Sekiguchi, Nobuyuki Itaya, Masahiro Tsuchiya, Eiji Itoi
BACKGROUND: The etiology of frozen shoulder (FS) is unclear. Accordingly, this study used a label-free quantitative shotgun proteomic approach to elucidate the pathogenesis of FS based on protein expression levels. METHODS: Tissue samples from the rotator interval (RI), middle glenohumeral ligament (MGHL), and anterior-inferior glenohumeral ligament (IGHL) were collected from 12 FSs with severe stiffness and 7 shoulders with a rotator cuff tear (RCT) as controls...
May 18, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29781913/corr-insights%C3%A2-what-are-the-effects-of-capsular-plication-on-translational-laxity-of-the-glenohumeral-joint-a-study-in-cadaveric-shoulders
#3
Thomas J Gill
No abstract text is available yet for this article.
May 17, 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29781910/superior-baseplate-inclination-is-associated-with-instability-after-reverse-total-shoulder-arthroplasty
#4
Robert Z Tashjian, Brook I Martin, Cassandra A Ricketts, Heath B Henninger, Erin K Granger, Peter N Chalmers
BACKGROUND: Instability is the most common complication after reverse total shoulder arthroplasty (rTSA). In the native glenohumeral joint, in addition to full dislocations, more subtle forms of instability exist. However, the incidence of more subtle forms of instability, the factors associated with instability, and the effect of instability on validated outcome scores after rTSA remain poorly understood. QUESTIONS/PURPOSES: (1) After rTSA, what is the risk of instability, including more subtle forms of subjective instability? (2) What are the factors associated with instability? (3) Are more subtle forms of instability associated with lower American Shoulder and Elbow Surgeons (ASES) functional outcome scores than those patients without instability? METHODS: A total of 168 rTSAs were performed during the study period...
May 17, 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29777344/arthroscopic-debridement-for-septic-arthritis-of-the-shoulder-joint-post-infectious-arthritis-is-an-inevitable-consequence
#5
Sung-Jae Kim, Yun-Rak Choi, Wonyong Lee, Woo-Seok Jung, Yong-Min Chun
PURPOSE: The purpose of this study was to compare clinical outcomes and development of post-infectious arthritis of the shoulder joint after single (Group S) or repeated (Group R) arthroscopic debridement surgeries. We hypothesized that (1) repeated surgeries might be attributable to initial subchondral involvement resulting from septic arthritis and (2) the repeated surgery group would exhibit a higher incidence of post-infectious arthritic changes and inferior clinical outcomes due to prolonged resolution of the infection...
May 18, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29770343/does-the-beighton-score-correlate-with-specific-measures-of-shoulder-joint-laxity
#6
Noah A Whitehead, Khalid D Mohammed, Mark L Fulcher
Background: Evaluation of shoulder joint laxity is an important component of the shoulder examination, especially in the setting of shoulder instability. Measures of generalized joint laxity, particularly the Beighton score, are often recorded and used to help make management decisions in these cases. However, no evidence is available to show that the Beighton score corresponds to specific measures of shoulder joint laxity. Purpose: To assess the correlation between the Beighton score and validated measures of shoulder joint laxity...
May 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29768337/variation-in-origin-of-the-long-head-of-the-biceps-brachii-tendon-in-a-cadaver-a-case-report
#7
Shuji Katsuki, Hayato Terayama, Ryuta Tanaka, Ning Qu, Osamu Tanaka, Kanae Umemoto, Kaori Suyama, Kou Sakabe
INTRODUCTION: In general, the long head of the biceps brachii (LHB) tendon arises from the supraglenoid tubercle in the shoulder joint, and it has an important stabilizing mechanism for the humeral head in the shoulder joint. This case demonstrates that even if the LHB tendon can be palpated outside of the shoulder joint, it may disappear in the intertubercular sulcus (IS) and in the glenohumeral (GH) joint because of abnormal articulation. PATIENT CONCERNS: This case involved the cadaver of an 82-year-old Japanese man (number 1936, cause of death: hepatocellular tumor), who was selected from the bodies used for gross anatomy practice at the Tokai University School of Medicine in 2017...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29754845/do-magnetic-resonance-imaging-and-computed-tomography-provide-equivalent-measures-of-rotator-cuff-muscle-size-in-glenohumeral-osteoarthritis
#8
Peter N Chalmers, Lindsay Beck, Irene Stertz, Alexander Aleem, Jay D Keener, Heath B Henninger, Robert Z Tashjian
BACKGROUND: Rotator cuff muscle volume is associated with outcomes after cuff repair and total shoulder arthroplasty. Muscle area on select magnetic resonance imaging (MRI) slices has been shown to be a surrogate for muscle volume. The purpose of this study was to determine whether computed tomography (CT) provides an equivalent measurement of cuff muscle area to a previously validated MRI measurement. METHODS: We included 30 patients before they were undergoing total shoulder arthroplasty with both preoperative CT and MRI scans performed within 30 days of one another at 1 institution using a consistent protocol...
May 10, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29752051/effect-of-shoulder-model-complexity-in-upper-body-kinematics-analysis-of-the-golf-swing
#9
M Bourgain, S Hybois, P Thoreux, O Rouillon, P Rouch, C Sauret
The golf swing is a complex full body movement during which the spine and shoulders are highly involved. In order to determine shoulder kinematics during this movement, multibody kinematics optimization (MKO) can be recommended to limit the effect of the soft tissue artifact and to avoid joint dislocations or bone penetration in reconstructed kinematics. Classically, in golf biomechanics research, the shoulder is represented by a 3 degrees-of-freedom model representing the glenohumeral joint. More complex and physiological models are already provided in the scientific literature...
April 25, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29741391/relationship-between-deltoid-and-rotator-cuff-muscles-during-dynamic-shoulder-abduction-a-biomechanical-study-of-rotator-cuff-tear-progression
#10
Felix Dyrna, Neil S Kumar, Elifho Obopilwe, Bastian Scheiderer, Brendan Comer, Michael Nowak, Anthony A Romeo, Augustus D Mazzocca, Knut Beitzel
BACKGROUND: Previous biomechanical studies regarding deltoid function during glenohumeral abduction have primarily used static testing protocols. HYPOTHESES: (1) Deltoid forces required for scapular plane abduction increase as simulated rotator cuff tears become larger, and (2) maximal abduction decreases despite increased deltoid forces. STUDY DESIGN: Controlled laboratory study. METHODS: Twelve fresh-frozen cadaveric shoulders with a mean age of 67 years (range, 64-74 years) were used...
May 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29740555/a-comparative-study-on-the-recruitment-of-shoulder-stabilizing-muscles-and-types-of-exercises
#11
João Carlos Comel, Rosane Maria Nery, Eduardo Lima Garcia, Claudete da Silva Bueno, Edinara de Oliveira Silveira, Mariéle Marchezan Zarantonello, Marco Antonio Stefani
The shoulder is susceptible to disturbances caused by microtraumas due to direct contact of the surrounding skeletal structures or failure of the soft parts of the rotator cuff and other muscles inserted into the glenohumeral joint. The purpose of the study was to compare the electromyographic signal in the stabilizing muscles of the shoulder during the diagonal elevation exercise as recommended by the proprioceptive neuromuscular facilitation (PNF) method and dumbbell exercise. This study is classified as Quase-experiment...
April 2018: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29731396/critical-shoulder-angle-in-an-east-asian-population-correlation-to-the-incidence-of-rotator-cuff-tear-and-glenohumeral-osteoarthritis
#12
Kiyotsugu Shinagawa, Taku Hatta, Nobuyuki Yamamoto, Jun Kawakami, Yuki Shiota, Mitsuyoshi Mineta, Eiji Itoi
BACKGROUND: Focus has recently been on the critical shoulder angle (CSA) as a factor related to rotator cuff tear and osteoarthritis (OA) in the European population. However, whether this relationship is observed in the Asian population is unclear. METHODS: The correlation between the CSAs measured on anteroposterior radiographs and the presence or absence of rotator cuff tears or OA changes was assessed in 295 patients. Rotator cuff tears were diagnosed with magnetic resonance imaging or ultrasonography...
May 3, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29730466/development-of-the-long-head-of-the-biceps-brachial-tendon-a-possible-explanation-of-the-anatomical-variations
#13
Jorge Murillo-González, Crótida De La Cuadra-Blanco, Luis-A Arráez-Aybar, Manuel-E Herrera-Lara, Alvaro Minuesa-Asensio, José Ramón Mérida-Velasco
The anatomical variations of the proximal portion of the long head of the biceps brachii tendon (LHBT) are rarely observed in clinical practice. However, an increase in the rate of shoulder arthroscopic surgery has led to an increase in the observation of anatomical variations of this region. The aim of this work was to analyze the development of the LHBT in 23 human embryos ranging from the 6th to 8th weeks of development. The LHBT develops from the glenohumeral interzonal mesenchyme in the 6th week. By week 7, the myotendinous junction of the LHBT develops...
May 3, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29730137/differentiation-of-bony-and-soft-tissue-adaptations-of-the-shoulder-in-professional-baseball-pitchers
#14
Katherine E Reuther, Scott Sheridan, Stephen J Thomas
BACKGROUND: Baseball pitching places tremendous forces on the arm, which may lead to structural tissue adaptations that are represented by changes in rotational range of motion (ROM). These adaptations often include both bony and soft tissue; however, the contribution of each tissue to the change in motion is not always clinically attainable. The purposes of this study were to determine the adaptations of ROM, bone, and soft tissue bilaterally and to examine the correlation between clinical ROM and humeral retroversion (HR)-corrected ROM...
May 2, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29730136/a-simple-method-to-directly-evaluate-the-lateral-extension-of-the-acromion-an-anatomic-study-of-128-cadaveric-scapulae
#15
Trifon Totlis, Anirudh K Gowd, Eamon D Bernardoni, Brian J Cole, Nikhil N Verma, Konstantinos Natsis
BACKGROUND: The lateral extension of the acromion from the glenohumeral joint is the critical variable that both the acromial index and critical shoulder angle reflect. The purpose of this study was to establish a simple and reproducible method to directly measure the lateral extension of the acromion that will be independent of patient demographic characteristics, scapular rotation, or other morphologic features of the shoulder. METHODS: This study used 128 unpaired cadaveric scapulae with a mean age of 69...
May 2, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29709415/biomechanical-comparison-of-glenoid-implants-with-adaptable-and-fixed-backside-curvatures-in-anatomic-total-shoulder-arthroplasty
#16
Alexandre Terrier, Raphaël Obrist, Valérie Malfroy Camine, Fabio Becce, Alain Farron
BACKGROUND: We evaluated the biomechanical effects and potential advantages of glenoid implants with adaptable backside curvature radii and compared them with standard implants having fixed backside curvatures in anatomic total shoulder arthroplasty (aTSA) for primary glenohumeral osteoarthritis with uniconcave glenoids. METHODS: A glenoid implant with adaptable backside curvatures (Aequalis PerFORM, Tornier SAS, Montbonnot, France) was compared with its previous model having a fixed curvature radius...
April 27, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29703261/biomechanical-analysis-of-plate-systems-for-proximal-humerus-fractures-a-systematic-literature-review
#17
REVIEW
Ali Jabran, Chris Peach, Lei Ren
BACKGROUND: Proximal humerus fractures are the third most common in the human body but their management remains controversial. Open reduction and internal fixation with plates is one of the leading modes of operative treatment for these fractures. The development of technologies and techniques for these plates, during the recent decades, promise a bright future for their clinical use. A comprehensive review of in vitro biomechanical studies is needed for the comparison of plates' mechanical performance and the testing methodologies...
April 27, 2018: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29701085/mid-term-results-of-anatomical-total-shoulder-arthroplasty-for-primary-osteoarthritis-using-a-short-stemmed-cementless-humeral-component
#18
M Schnetzke, S Rick, P Raiss, G Walch, M Loew
Aims The aim of this study was to evaluate the clinical and radiological outcome of using an anatomical short-stem shoulder prosthesis to treat primary osteoarthritis of the glenohumeral joint. Patients and Methods A total of 66 patients (67 shoulders) with a mean age of 76 years (63 to 92) were available for clinical and radiological follow-up at two different timepoints (T1, mean 2.6 years, sd 0.5; T2, mean 5.3 years, sd 0.7). Postoperative radiographs were analyzed for stem angle, cortical contact, and filling ratio of the stem...
May 1, 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29698293/can-shoulder-muscle-activity-be-evaluated-with-ultrasound-shear-wave-elastography
#19
Kwanwoo Kim, Hyun-Jung Hwang, Seul-Gi Kim, Jin-Hyuck Lee, Woong Kyo Jeong
BACKGROUND: Quantitative assessment of rotator cuff muscle activity is important in the treatment of shoulder disorders. However, the known methods for assessing rotator cuff muscle activity thus far have been inaccurate, invasive, and inconvenient. QUESTIONS/PURPOSES: (1) Does the activity of the deltoid, supraspinatus, and infraspinatus muscles measured using ultrasound shear wave elastography have a linear correlation with muscle activity assessed using generally used methods, including isokinetic dynamometry and electromyography? (2) Does the activity of the deltoid, supraspinatus, and infraspinatus muscles measured using shear wave elastography show good intraobserver and interobserver reliability? METHODS: Twelve volunteers participated in intrasession reliability experiments...
April 24, 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29697499/management-of-articular-cartilage-defects-in-the-glenohumeral-joint
#20
Adam J Seidl, Matthew J Kraeutler
Articular cartilage defects are not often encountered in the glenohumeral joint. These lesions are typically found in patients with shoulder trauma, recurrent instability, or previous surgical treatment. Diagnosis can be difficult; these defects are often found incidentally during arthroscopic or open surgical management of other pathology. Initial management of isolated glenohumeral chondral defects is nonsurgical and includes physical therapy and/or corticosteroid injections. If nonsurgical treatment is unsuccessful, patients may undergo surgery...
April 24, 2018: Journal of the American Academy of Orthopaedic Surgeons
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