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Acromion

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https://www.readbyqxmd.com/read/28986617/risk-of-fracture-of-the-acromion-depends-on-size-and-orientation-of-acromial-bone-tunnels-when-performing-acromioclavicular-reconstruction
#1
Felix Dyrna, Celso Cruz Timm de Oliveira, Michael Nowak, Andreas Voss, Elifho Obopilwe, Sepp Braun, Leo Pauzenberger, Andreas B Imhoff, Augustus D Mazzocca, Knut Beitzel
PURPOSE: Current techniques for anatomic repair of the dislocated acromioclavicular (AC) joint aim on reconstruction of the AC ligaments and utilize tunnels drilled through the acromion . This improves the stability of the reconstruction but might also increase the risk of fractures at the acromion. The purpose of this study was to evaluate the fracture risk for the acromion after transacromial tunnel placement for anatomic AC joint stabilization procedure. It was hypothesized that the risk of fracture of the acromion is correlated to size and orientation of bone tunnels commonly used for anatomic AC joint reconstruction...
October 6, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28975133/pectoralis-minor-contracture-in-throwing-shoulders-of-asymptomatic-adolescent-baseball-players
#2
Justin L Hodgins, William Rubenstein, David Kovacevic, Ajay Padaki, Charles M Jobin, Christopher S Ahmad
BACKGROUND: Although scapular malpositioning is commonly associated with rotational deficits and risk of injury, modifiable causes of such malpositioning in overhead athletes are not well described. PURPOSE/HYPOTHESIS: The purpose of this study was to examine the scapulothoracic profile of adolescent baseball players, specifically, pectoralis minor (PM) length. We hypothesized that PM would be shorter in throwing shoulders compared with nonthrowing shoulders. STUDY DESIGN: Cross-sectional study; Level of evidence, 3...
September 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28967242/clinical-evaluation-of-static-scapular-posture-in-overhead-athletes-with-asymptomatic-shoulder-injuries
#3
Maria Papandreou, Evripidis Diamantis, Vasiliki-Ioanna Vrachlioti, Evdokia Billis, John Gliatis
BACKGROUND: Several etiologic factors have been postulated in overhead athletes according to their shoulder injuries, such as the scapular posture asymmetries. The measurement of the acromion border distance has been considered as reliable clinical test for evaluating the static scapula posture. The aim of this study was to quantify the differences in scapular posture between the dominant and non-dominant shoulders in two static positions in volleyball and swimmers athletes with asymptomatic shoulder injuries using the sliding calliper device...
September 29, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28941970/outcome-of-reverse-shoulder-arthroplasty-with-pedicled-pectoralis-transfer-in-patients-with-deltoid-paralysis
#4
Bassem T Elhassan, Eric R Wagner, Jean-David Werthel, Malo Lehanneur, Julia Lee
BACKGROUND: Management of shoulder arthritis associated with deltoid paralysis can be very challenging. The purpose of this study was to report the outcome of reverse shoulder arthroplasty with pedicled pectoralis transfer to reconstruct the anterior deltoid in patients with symptomatic shoulder arthritis and a paralyzed deltoid. METHODS: This study included 31 patients with an average age of 51 years (range, 27-73 years). All patients had chronic deltoid paralysis with significant loss of function due to progressive arthritis associated with rotator cuff deficiency...
September 20, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28932971/the-correlation-of-supraspinatus-outlet-view-with-computed-tomography-for-visualization-of-the-anterior-acromial-undersurface
#5
Viktor Feldman, Niv Marom, Meir Nyska, Eugene Kotz, Jonathan E J Koh, Vidal Barchilon
INTRODUCTION: Understanding the real shape of the undersurface of the acromion prior to acromioplasty is indispensable. Today, Supraspinatus outlet view (SSOV) is a standard view used to determine the shape of the anterior acromion. Three types of acromial undersurface were described by Bigliani and Morrison. The purpose of this study was to find out whether the real acromial type can be visualized on X-ray SSOV and compare the shape of the anterior undersurface of the acromion visualized on SSOV, with the shape revealed on 2D CT reconstructions...
September 20, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28932284/acromial-j-bone-graft-on-the-acromion-for-surgical-treatment-of-glenohumeral-instability-an-anatomical-study
#6
Matthieu Sanchez, Shahnaz Klouche, Bruno Faivre, Thomas Bauer, Philippe Hardy
BACKGROUND: Anterior glenohumeral instability is frequently associated with anteroinferior glenoid bone defects. One original technique has been described in the literature that incorporates a J-shaped graft from the iliac crest into the anterior glenoid rim. The main goal of the present study was to evaluate the feasibility of harvesting a J-shaped graft from the acromion that corresponds to previously described dimensions. The secondary goal was to determine the ideal harvesting site...
October 2017: Shoulder & Elbow
https://www.readbyqxmd.com/read/28929007/the-postcranial-skeleton-of-boreogomphodon-cynodontia-traversodontidae-from-the-upper-triassic-of-north-carolina-usa-and-the-comparison-with-other-traversodontids
#7
Jun Liu, Vincent P Schneider, Paul E Olsen
Postcranial remains of Boreogomphodon from the Upper Triassic of North Carolina are described and compared to those of other known traversodontid cynodonts. The postcranial skeleton of Boreogomphodon is characterized by four sacral ribs, simple ribs lacking costal plates, the extension of the scapular neck below the acromion process, a short scapular facet on the procoracoid, a concave anterior margin of the procoracoid, humerus entepicondyle with smooth corner, and the presence of a fifth distal carpal. Four types of ribs are identified among traversodontids: 'normal' form, tubercular rib, costal plate, and Y-shaped rib...
2017: PeerJ
https://www.readbyqxmd.com/read/28905690/the-acromiohumeral-centre-edge-angle-a-new-radiographic-measurement-and-its-association-with-rotator-cuff-pathology
#8
Neal Singleton, Lewis Agius, Stephen Andrews
BACKGROUND: Various radiographic measurements that describe humeral head coverage by the acromion and the effect on rotator cuff pathology have been reported. This study aimed to describe and validate a new radiographic measurement, the acromiohumeral centre edge angle (ACEA). METHODS: We compared the ACEA on computed tomography (CT) and plain X-ray to determine whether X-ray is accurate for measuring this angle. We then compared the results from this control population with 107 patients with acute rotator cuff tears...
September 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28898793/displaced-acromion-fracture-a-rare-injury-case-report
#9
Özgür Çiçekli, Abdülhalim Akar, Hüseyin Nevzat Topçu
INTRODUCTION: Acromion fractures are extremely rare. There are no common accepted treatment schemes and fixation methods We aimed to present a case which may contribute to the diagnosis and treatment of acromion fracture in a patient with polytrauma. PRESENTATION OF CASE: Acromion fracture associated with scapula and clavicle fractures was diagnosed in 40 years old patient and treated with open reduction and cannulated screw fixation. The fracture healing was completed without causing subacromial impingement...
September 1, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28862102/shoulder-motion-assistance-using-a-single-joint-hybrid-assistive-limb-%C3%A2-robot-evaluation-of-its-safety-and-validity-in-healthy-adults
#10
Takeshi Makihara, Hideki Kadone, Shinzo Onishi, Shigeki Kubota, Yasushi Hada, Yukiyo Shimizu, Hiroaki Kawamoto, Yoshiyuki Sankai, Masashi Yamazaki
PURPOSES: To evaluate the feasibility of using the single-joint Hybrid Assistive Limb(®) robot (HAL) to assist with shoulder flexion-extension in healthy adults, and to assess the capacity of the HAL to analyze the bioelectrical signals of muscle activity for shoulder flexion-extension. METHODS: This cross-sectional feasibility study included six healthy adult men with no impairment in shoulder motion. The single-joint HAL was fixed to a custom-designed platform and upper arm attachment, and aligned 3 cm below the acromion process...
September 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28856939/three-dimensional-morphological-analysis-of-acromioclavicular-joint-in-patients-with-and-without-subacromial-erosion-after-hook-plate-fixation
#11
Peng-Cheng Shen, Yu Zhu, Hui Zhang, Li-Fan Zhu, Feng-Biao Weng, Fu-Gui Jiang, Neng Xu, Wen Ju, Xiao-Lin Li
Objective To investigate the role of acromioclavicular joint morphology in the presence of subacromial erosion after hook plate fixation. Methods We retrospectively analyzed the clinical data of 36 patients (17 men, 19 women; mean age, 48.7 years; range, 21-76 years) treated with hook plate fixation for distal clavicular fractures (n = 20) or acromioclavicular joint dislocation (n = 16) from August 2011 to March 2013. The patients were divided into two groups: the subacromial erosion group (18 patients) and the normal group (18 patients)...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28856018/sonographic-detection-of-inferior-subluxation-in-post-stroke-hemiplegic-shoulders
#12
Bukunmi M Idowu, Oluwagbemiga O Ayoola, Victor A Adetiloye, Morenikeji A Komolafe, Babalola I Afolabi
AIM OF THE STUDY: To evaluate the usefulness of ultrasonographic acromion-greater tuberosity distance measurement and Shoulder ratio in detecting post-stroke inferior shoulder subluxation. MATERIAL AND METHODS: Forty-five hemiplegic stroke patients and 45 controls underwent shoulder sonography to measure their acromion-greater tuberosity distance. Side-to-side acromion-greater tuberosity distance differences and Shoulder ratios were derived from the acromion-greater tuberosity distance values...
June 2017: Journal of Ultrasonography
https://www.readbyqxmd.com/read/28838704/contact-pressure-of-the-coracoacromial-arch-in-shoulders-with-joint-contracture-a-cadaveric-study
#13
Yuki Shiota, Nobuyuki Yamamoto, Jun Kawakami, Hideaki Nagamoto, Takayuki Muraki, Kazuo Kaneko, Eiji Itoi
BACKGROUNDS: There have been many reports describing that the capsular fibrosis of the shoulder joint is the main cause of frozen shoulder, whereas others reported the significance of subacromial impingement as an etiological factor. The purpose of this study was to investigate the contact pressure between the coracoacromial arch and the rotator cuff tendons to clarify the contact phenomenon in shoulders with joint contracture. METHODS: Fourteen fresh-frozen cadaveric shoulders were used...
August 21, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28827054/reverse-shoulder-arthroplasty-in-young-patient-with-achondroplasia-ten-year-follow-up-case-report
#14
M van den Broek, O Verborgt, G Declercq
Skeletal dysplasia in achondroplasia can affect all body joints - including the glenohumeral joint - and is prone to develop to degenerative osteoarthritis (OA). This may cause pain and mobility problems at young age. Surgical treatment is challenging due to the dysplastic anatomy of the shoulder joint - with a dysplastic deformed short humerus, a small, hypoplastic medialized glenoid and lateralized acromion - and the long life expectancy of these patients. The indications for reverse shoulder arthroplasty (RSA) evolved during years with rotator cuff tears and rotator cuff arthropathy in combination with or without glenohumeral OA as the main indicator, with good short to mid-term results...
August 5, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28822721/postural-assessment-in-class-iii-patients-before-orthognathic-surgery
#15
Fernando Zugno Kulczynski, Fernando de Oliveira Andriola, Pedro Henrique Deon, Denizar Alberto da Silva Melo, Rogério Miranda Pagnoncelli
PURPOSE: To determine the postural characteristics of patients with Class III dentofacial deformities before orthognathic surgery by photogrammetry using SAPO postural assessment software. MATERIALS AND METHODS: This was a cross-sectional study. Eligible participants were adult patients who had an indication for orthognathic surgery to correct skeletal Class III dentofacial deformities and were undergoing orthodontic preparation for surgery. Patients were recruited at the outpatient clinic for dentofacial deformities of the authors' institution from March to November 2015...
July 25, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28792929/new-gliding-mammaliaforms-from-the-jurassic
#16
Qing-Jin Meng, David M Grossnickle, Di Liu, Yu-Guang Zhang, April I Neander, Qiang Ji, Zhe-Xi Luo
Stem mammaliaforms are Mesozoic forerunners to mammals, and they offer critical evidence for the anatomical evolution and ecological diversification during the earliest mammalian history. Two new eleutherodonts from the Late Jurassic period have skin membranes and skeletal features that are adapted for gliding. Characteristics of their digits provide evidence of roosting behaviour, as in dermopterans and bats, and their feet have a calcaneal calcar to support the uropagatium as in bats. The new volant taxa are phylogenetically nested with arboreal eleutherodonts...
August 17, 2017: Nature
https://www.readbyqxmd.com/read/28777666/shoulder-bone-geometry-affects-the-active-and-passive-axial-rotational-range-of-the-glenohumeral-joint
#17
Alexander Humphries, Srdjan Cirovic, Aliah F Shaheen
BACKGROUND: The range of motion of the glenohumeral joint varies substantially among individuals and is dependent on humeral position. How variation in shape of the humerus and scapula affects shoulder axial range of motion at various positions has not been established. PURPOSE: To quantify variation in the shape of the glenohumeral joint and investigate whether the scapula and humerus geometries affect the axial rotational range of the glenohumeral joint. STUDY DESIGN: Descriptive laboratory study...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28750960/the-effects-of-opposite-directional-static-contraction-of-the-muscles-of-the-right-upper-extremity-on-the-ipsilateral-right-soleus-h-reflex
#18
Tomoko Shiratani, Mitsuo Arai, Hironobu Kuruma, Kazue Masumoto
The objective of this study was to explore the neurophysiological remote after-effects of resistive static contraction (SC) of the muscles of the upper extremity, considering the resistant direction on the ipsilateral (right) soleus H-reflex. The participants included 12 normal subjects with a mean (SD) age of 23.8 (2.8) years. The subjects were asked to maintain their upper extremity against the traction force, at a level of resistance that was 50% of the maximal SC strength. A 20-s SC of the muscles of the upper extremity utilizing contraction of the upper extremity muscles using a diagonal flexion (shoulder flexion-adduction-external rotation) or extension (shoulder extension-abduction-internal rotation), a proprioceptive neuromuscular facilitation (PNF) pattern was induced...
July 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28739300/the-critical-shoulder-angle-is-associated-with-osteoarthritis-in-the-shoulder-but-not-rotator-cuff-tears-a-retrospective-case-control-study
#19
Arnar O Bjarnison, Thomas J Sørensen, Thomas Kallemose, Kristoffer W Barfod
BACKGROUND: In 2013 Moor et al introduced the concept of the critical shoulder angle (CSA) and suggested that an abnormal CSA was a leading factor in development of rotator cuff tear (RCT) and osteoarthritis (OA) of the shoulder. This study assessed whether the CSA was associated with RCT and OA and tested the inter- and intrarater reliability of the CSA when measuring RCT and OA. MATERIALS AND METHODS: The study was performed as a retrospective case-control study...
July 21, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28735412/variability-in-attachment-of-the-coracoacromial-ligament-in-relation-with-its-morphology
#20
Abdulrahman Alraddadi, Abduelmenem Alashkham, Clare Lamb, Roger Soames
PURPOSE: The coracoacromial ligament (CAL) presents with variable morphology and plays a significant role in the development of subacromial impingement syndrome. Sectioning the CAL has been suggested to relieve impingement of the rotator cuff. The aim of the current study was to investigate the CAL attachment in relation with ligament morphology. MATERIALS AND METHODS: The CAL was investigated in 220 cadaveric shoulders from 58 males and 59 females, with a median age of 82 years (range 53-102 years)...
July 22, 2017: Surgical and Radiologic Anatomy: SRA
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