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David Charles Ackland, Dale Lee Robinson, Adam Wilkosz, Wen Wu, Martin Richardson, Peter Lee, Kwong Ming Tse
Rotator cuff tears are known to affect clinical outcome of reverse total shoulder arthroplasty (RSA). This study aimed to use computational modelling to quantify the effect of rotator cuff tear severity on muscle and joint forces after RSA, as well as stresses at the glenosphere, base-plate, fixation screws, scapula, and humeral components. A multi-body musculoskeletal model of the glenohumeral joint was developed comprising the scapula, humerus and 9 major upper limb muscles. Simulations of abduction and flexion were performed after RSA with the intact rotator cuff and tears to (i) supraspinatus (ii) supraspinatus and infraspinatus (iii) supraspinatus, infraspinatus and subscapularis...
October 16, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Philippe Collin, Herve Thomazeau, Gilles Walch, Christian Gerber, Pierre Mansat, Luc Favard, Michel Colmar, Jean François Kempf, Anthony Hervé, Michael Betz
BACKGROUND: This study evaluated the clinical and structural outcome 20 years after repair of isolated supraspinatus tendon tears. We hypothesized that the results would deteriorate over time. MATERIALS AND METHODS: For this retrospective multicenter study, 137 patients were recalled for a clinical and imaging assessment. Six patients (4.3%) had died from unrelated causes, 52 (38.0%) were lost to follow-up, and 13 (9.5%) had undergone reoperations. This left 66 patients for clinical evaluation...
October 12, 2018: Journal of Shoulder and Elbow Surgery
Maria Pilar Aparisi Gómez, Francisco Aparisi, Alberto Bazzocchi
62-year-old male, consulting for ongoing pain in the right shoulder, noticeable on performance of daily tasks. Physical examination demonstrates generalized pain with mobilization, more marked with external rotation, and limited abduction, with a mechanical block at 60 degrees. Oblique-Sagittal Short-TI inversion recovery (STIR) (figure 1) demonstrates a low signal intensity structure at the footprint of the infraspinatus (white arrow). This has an extra and an intraosseous component, resembling an hourglass...
October 10, 2018: Arthritis & Rheumatology
Steven W Forbush, William D Bandy, Mark K Garrison, Leslyn C Graves, Rachel Roberts
Background: Muscle strength testing of an injured infraspinatus muscle (IM) is confounded by actions of synergistic muscles such as the posterior deltoid (PD). Hypothesis/Purpose: The purpose of this study was to describe a condition for testing of the IM that results in less EMG activity of the PD musculature. The researchers hypothesized that greater inhibition of the PD could be achieved through active adduction (AA), creating reciprocal inhibition of the PD...
August 2018: International Journal of Sports Physical Therapy
Kara M Nyquist, Travis G O'Quinn, Lindsey N Drey, Loni W Lucherk, J C Brooks, Mark F Miller, Jerrad F Legako
The objective of this study was to determine the palatability of various beef cuts from 3 USDA quality grades. Five different beef subprimals from USDA Prime, Choice, and Select (n = 10/quality grade) carcasses were utilized for the study, including: strip loins, inside rounds, bottom rounds, shoulder clods, and chuck rolls. Subprimals were fabricated into 9 retail cuts, which contained the following beef muscles: longissimus lumborum (LL); longissimus thoracis, complexus, and spinalis dorsi (LCS); infraspinatus (IF); serratus ventralis (SV); triceps brachii (TB); teres major (TM); adductor (AD); semimembranosus (SM); and biceps femoris (BF)...
September 29, 2018: Journal of Animal Science
Anne R Titelbaum, Bebel Ibarra Asencios, Bronwyn E McNeil
While intraosseous cysts have been described in the paleopathological literature, it is rare to find reports concerning effects of soft tissue cysts, although they are relatively common in clinical contexts. Here we present plausible evidence of an extraosseous paralabral cyst, seen in an adult scapula from a Late Intermediate period commingled tomb (ca. AD 1200) at the northern highland site of Marcajirca, Ancash, Peru. The scapula demonstrated a smooth-sided concave depression at the spinoglenoid notch. The depression was notable for its regular appearance, with no bone deposition or destruction...
September 20, 2018: International Journal of Paleopathology
Eric R Wagner, Jarret M Woodmass, Kathryn M Welp, Michelle J Chang, Bassem T Elhassan, Laurence D Higgins, Jon J P Warner
Background: Massive irreparable rotator cuff tears in both the primary and the revision setting are challenging problems. There remains controversy over the ideal treatment methods for these patients. In the case of an irreparable posterosuperior rotator cuff tear, tendon transfers1-12 have emerged as a reliable option, with a durable outcome. The most commonly used tendon transfer options are the latissimus dorsi (LD)1-6 and the lower trapezius (LT)12 . Description: The LD transfer is performed by first harvesting the LT tendon from the humeral shaft...
June 27, 2018: JBJS Essential Surgical Techniques
Lachlan Huntington, Jasamine Coles-Black, Martin Richardson, Tony Sobol, Jonathon Caldow, Jason Chuen, David C Ackland
BACKGROUND: Rotator cuff repair surgery aims to create a secure, pressurized tendon-bone footprint to permit re-establishment of the fibrovascular interface and tendon healing. Flat-braided suture-tape is an alternative suture material to traditional suture-wire that has potential to reproduce a larger repair construct contact area. The objective of this study was to compare contact pressure, area as well as the mechanical fatigue strength between suture-wire and suture-tape Suture-bridge repair constructs in an ovine model...
September 6, 2018: Injury
S Kotoshiba, Y Urabe, N Maeda, J Sasadai, M Hara
No abstract text is available yet for this article.
September 2018: Gait & Posture
Luke S Harmer, Colin V Crickard, Kevin D Phelps, R Randall McKnight, Katherine M Sample, Erica B Andrews, Nady Hamid, Joseph R Hsu
Background: Debate exists over the optimal approach for addressing fractures of the proximal humerus. The purpose of this study was to objectively quantify the surface area of the humerus exposed using the deltopectoral (DP) and anterolateral acromial (ALA) approaches and to compare visualized and palpable anatomic landmarks. Methods: Ten arms on five fresh-frozen torsos underwent the DP and ALA approaches. The arms were positioned to simulate a supine patient and held in a fixed position...
June 2018: Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews
Zili Wang, Xuhui Liu, Michael R Davies, Devante Horne, Hubert Kim, Brian T Feeley
BACKGROUND: Rotator cuff (RC) tears are common tendon injuries seen in orthopaedic patients. Successful repair of large and massive RC tears remains a challenge due to our limited understanding of the pathophysiological features of this injury. Clinically relevant small animal models that can be used to study the pathophysiological response to repair are limited by the lack of chronic repair models. PURPOSE: To develop a highly clinically relevant mouse model of delayed RC repair...
October 2018: American Journal of Sports Medicine
William A Hester, Michael J O'Brien, Wendell M R Heard, Felix H Savoie
Background: Superior labrum tears extending from anterior to posterior (SLAP lesion) are a cause of significant shoulder pain and disability. Management for these lesions is not standardized. There are no clear guidelines for surgical versus non-surgical treatment, and if surgery is pursued there are controversies regarding SLAP repair versus biceps tenotomy/tenodesis. Objective: This paper aims to briefly review the anatomy, classification, mechanisms of injury, and diagnosis of SLAP lesions...
2018: Open Orthopaedics Journal
Shuichi Sasaki, Tomonori Kenmoku, Ayumi Otera, Genyo Miyajima, Naoshige Nagura, Mitsufumi Nakawaki, Toshiyuki Nakazawa, Masashi Takaso, Michinari Fukuda, Naonobu Takahira
BACKGROUND: Strengthening the infraspinatus is important in shoulder rehabilitation. Changes in infraspinatus activity with changing load and position have not been quantified. We sought to determine the most appropriate load and posture for early infraspinatus strengthening by assessing for changes in electromyographic activity in the healthy infraspinatus and other shoulder girdle muscles during isometric external rotational exercise under different loads with the shoulder adducted in the supine and seated positions...
September 6, 2018: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
Kjersti Kaul Jenssen, Kirsten Lundgreen, Jan Erik Madsen, Rune Kvakestad, Are Hugo Pripp, Sigbjørn Dimmen
PURPOSE: The aim of this study was to compare clinical and radiologic results among patients with 3 versus 6 weeks of immobilization after arthroscopic rotator cuff (RC) repair in a prospective randomized controlled non-inferiority trial. METHODS: One hundred twenty patients were included after RC surgery for a small- to medium-sized tear of supraspinatus and upper infraspinatus tendons. Group A was immobilized in a simple sling for 3 weeks, and group B had a brace with a small abduction pillow with the arm in neutral position for 6 weeks...
October 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
Giuseppe Porcellini, Paolo Palladini, Stefano Congia, Alessandro Palmas, Giovanni Merolla, Antonio Capone
BACKGROUND: Surgical treatment of scapular fractures with posterior approach is frequently associated with postoperative infraspinatus hypotrophy and weakness. The aim of this retrospective study is to compare infraspinatus strength and functional outcomes in patients treated with the classic Judet versus modified Judet approach for scapular fracture. PATIENTS AND METHODS: 20 cases with scapular neck and body fracture treated with posterior approach for lateral border plate fixation were reviewed...
September 5, 2018: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
Patrick J Denard
A growing body of evidence has demonstrated that repetitive overhead athletes with shoulder pathology often have associated infraspinatus atrophy and suprascapular neuropathy. Although decompression of the suprascapular nerve has not been shown to clearly impact outcomes in the general population, release of the nerve in overhead athletes with documented evidence of impingement may improve outcomes in this high-demand population.
September 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
Furuya Kanji, Nishinaka Naoya, Uehara Taishi, Tsutsui Hiroaki
Introduction: This report describes a case of irreparable massive rotator cuff tear and axillary nerve palsy associated with shoulder dislocation successfully treated by arthroscopic superior capsule reconstruction (ASCR), with a favorable post-operative outcome. Case Report: A 76-year-old man, injured from a fall while walking, presented to another hospital with right shoulder pain and a limited range of motion (ROM) 3 days after the injury. Given a diagnosis of right shoulder dislocation, he received manual reduction followed by immobilization with a sling...
March 2018: Journal of Orthopaedic Case Reports
Fabienne Reynard, Philippe Vuistiner, Bertrand Léger, Michel Konzelmann
BACKGROUND: Kinesiotape (KT) is widely used in musculoskeletal rehabilitation as an adjuvant to treatment, but minimal evidence supports its use. The aim of this study is to determine the immediate and short-term effects of shoulder KT on muscular activity, mobility, strength and pain after rotator cuff surgery. METHODS: Thirty-nine subjects who underwent shoulder rotator cuff surgery were tested 6 and 12 weeks post-surgery, without tape, with KT and with a sham tape (ST)...
August 22, 2018: BMC Musculoskeletal Disorders
Ko Yanase, Satoshi Hasegawa, Masatoshi Nakamura, Taishi Yamauchi, Satoru Nishishita, Kojiro Araki, Jun Umehara, Kosuke Fujita, Ikuya Sato, Satoko Ibuki, Noriaki Ichihashi
The purpose of this study was to determine the effects of six weeks of electrical muscle stimulation (EMS) on the strength and muscle mass of the infraspinatus muscle. Twenty non-athletes (age: 24±3.4 years, height: 171.5±5.6 cm, mass: 65.2±8.1 kg) were randomly classified into two groups, an electrical muscle stimulation group (EMS group) and a control group (CON group). The EMS group completed a total of 18 20- min EMS sessions, three times per week over a period of six weeks, while the CON group received no intervention...
October 2018: International Journal of Sports Medicine
Takeshi Kataoka, Takeshi Kokubu, Tomoyuki Muto, Yutaka Mifune, Atsuyuki Inui, Ryosuke Sakata, Hanako Nishimoto, Yoshifumi Harada, Fumiaki Takase, Yasuhiro Ueda, Takashi Kurosawa, Kohei Yamaura, Ryosuke Kuroda
BACKGROUND: Fascia lata augmentation of massive rotator cuff tears has shown good clinical results. However, its biological effect during the early healing process is not clearly understood. The purpose of the study was to evaluate the biological efficacy of fascia lata augmentation during the early healing process of rotator cuff tears using a rabbit rotator cuff defect model. METHODS: The infraspinatus tendon was resected from the greater tuberosity of a rabbit to create a rotator cuff tear...
August 13, 2018: Journal of Orthopaedic Surgery and Research
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