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https://www.readbyqxmd.com/read/29786835/bilateral-asymmetry-of-the-humerus-in-neandertals-australian-aborigines-and-medieval-humans
#1
Anna Maria Kubicka, Wioletta Nowaczewska, Antoine Balzeau, Janusz Piontek
OBJECTIVES: Bilateral asymmetry of diaphyseal shape and size may be a reflection of relative activity levels and patterns of habitual biomechanical stress in the upper arms of Neandertals and Homo sapiens. The main purpose of our study was to assess the level of directional asymmetry of humeral cross sections in Neandertals, recent Australian aborigines, and medieval farmers. MATERIALS AND METHODS: Indices of directional and absolute asymmetry (%DA and %AA) of humeral cross-sectional properties in Neandertals and recent Homo sapiens were calculated...
May 22, 2018: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29779978/biomechanical-evaluation-of-cable-and-suture-cerclages-for-tuberosity-reattachment-in-a-4-part-proximal-humeral-fracture-model-treated-with-reverse-shoulder-arthroplasty
#2
Dominik Knierzinger, Christian H Heinrichs, Clemens Hengg, Marko Konschake, Franz Kralinger, Werner Schmoelz
BACKGROUND: Sufficient tuberosity fixation in proximal humeral fractures treated with shoulder arthroplasty is essential to gain a good clinical outcome. This biomechanical study evaluated the strength of the reattached tuberosities in reverse total shoulder arthroplasty fixed with cables or with sutures in a cerclage-like technique. Considering the mechanical advantages of flexible titanium alloy cables compared with conventional sutures for cerclage-like fixations, we hypothesized that titanium alloy cables would achieve higher fixation strengths of the tuberosities compared with heavy nonabsorbable sutures...
May 17, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29778411/a-probable-primary-malignant-bone-tumor-in-a-pre-columbian-human-humerus-from-cerro-brujo-bocas-del-toro-panam%C3%A3
#3
Nicole E Smith-Guzmán, Jeffrey A Toretsky, Jason Tsai, Richard G Cooke
We present a rare case of primary bone cancer principally affecting the right humerus of a skeleton from the pre-Columbian site of Cerro Brujo (1265-1380 CE) in Bocas del Toro, on the Caribbean coast of Panamá, excavated in the early 1970s. The humerus contains a dense, calcified sclerotic mass with associated lytic lesions localized around the midshaft of the diaphysis. Evidence of systemic inflammation and anemia, likely caused by the cancer, are visible in the form of severe porotic hyperostosis of the cranial vault and bilateral periosteal reactions in the tibiae...
May 26, 2017: International Journal of Paleopathology
https://www.readbyqxmd.com/read/29776819/corrective-osteotomy-for-hyperextended-elbow-with-limited-flexion-due-to-supracondylar-fracture-malunion
#4
Keiichiro Oura, Atsuo Shigi, Kunihiro Oka, Hiroyuki Tanaka, Tsuyoshi Murase
BACKGROUND: Extension deformity of the distal humerus after a malunited supracondylar fracture can restrict elbow flexion. Here we report a computer-assisted operative procedure and review the results of clinical cases in which corrective surgery was performed. METHODS: The medical records of the patients who underwent corrective osteotomy for hyperextended elbow malunion of the distal humerus with limited elbow flexion (flexion angle ≤100°) were reviewed retrospectively...
May 15, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29762195/functional-outcomes-and-complications-after-oncologic-reconstruction-of-the-proximal-humerus
#5
Sjoerd Nota, Teun Teunis, Joost Kortlever, Marco Ferrone, John Ready, Mark Gebhardt, Kevin Raskin, Francis Hornicek, Joseph Schwab, Santiago Lozano Calderon
BACKGROUND: No consensus exists on the best method of articular reconstruction in patients who require proximal humerus resection for the management of primary bone sarcomas, soft-tissue sarcomas extending into the bone, benign and locally aggressive primary bone tumors, and metastatic disease. METHODS: We identified patients from two institutions who underwent wide resection of the proximal humerus along with oncologic reconstruction using osteoarticular allografts (OAs), endoprostheses, or allograft-prosthesis composites...
June 1, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29761555/computational-optimization-of-graft-tension-in-simulated-superior-capsule-reconstructions
#6
Michael W Hast, Elaine Schmidt, John D Kelly, Josh R Baxter
Superior capsular reconstruction has received increased attention as a surgical technique to address massive 'irreparable' rotator cuff tears; however, the functional limitations and surgical techniques associated with this repair have yet to be sufficiently explored. The goal of this study was to utilize a multidisciplinary approach to characterize the biomechanics of this repair by: 1) identifying activities of daily living that may overburden graft, and 2) optimizing surgical techniques used during implantation...
May 14, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29752051/effect-of-shoulder-model-complexity-in-upper-body-kinematics-analysis-of-the-golf-swing
#7
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/29744649/a-comparative-biomechanical-study-on-different-fixation-techniques-in-the-management-of-transverse-metaphyseal-diaphyseal-junction-fractures-of-the-distal-humerus-in-children
#8
Allieu Kamara, Xianglu Ji, Tianjing Liu, Yu Zhan, Jianjun Li, Enbo Wang
BACKGROUND: Metaphyseal-diaphyseal junction (MDJ) fractures of the distal humerus are problematic to reduce and more susceptible to post-operative complications. This biomechanical study was designed to compare Kirschner wires (KW), lateral external fixation, and elastic stable intramedullary nails (ESIN) in simulated transverse MDJ fractures of various heights. METHOD: Sagittally oblique, transverse MDJ fractures were created in fourth-generation composite bone models at three levels: high, mid, and low fractures, respectively, and then fixed with either Kirschner wires, lateral external fixation (EF), or ESIN respectively and tested in extension, flexion, valgus, varus, internal, and external rotations...
May 9, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29740100/genetic-and-environmental-influences-on-fetal-growth-vary-during-sensitive-periods-in-pregnancy
#9
Tsegaselassie Workalemahu, Katherine L Grantz, Jagteshwar Grewal, Cuilin Zhang, Germaine M Buck Louis, Fasil Tekola-Ayele
Aberrant fetal growth is associated with morbidities and mortality during childhood and adult life. Although genetic and environmental factors are known to influence in utero growth, their relative contributions over pregnancy is unknown. We estimated, across gestation, the genetic heritability, contribution of shared environment, and genetic correlations of fetal growth measures (abdominal circumference (AC), humerus length (HL), femur length (FL), and estimated fetal weight (EFW)) in a prospective cohort of dichorionic twin gestations recruited through the NICHD Fetal Growth Studies...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29736917/use-of-cancellous-bone-grafting-to-promote-granulation-tissue-in-a-distal-limb-wound-in-a-dog
#10
K Barnes, O Lanz, S Barry, K Aulakh
A 5-year-old female spayed Shetland sheepdog presented for evaluation of bandage sores on the left pelvic limb after a splint was placed to stabilise a digit fracture incurred approximately 2 weeks previously. Multiple areas of necrosis were identified upon bandage removal. After debridement of devitalised tissue, a 4 cm wound on the plantar surface of the metatarsal bones (with exposed bone and tendons) remained. The Papineau technique (which involves removal of infected or necrotic tissue, placement of autogenous cancellous bone graft within a wound, and delayed skin closure) was used to treat this wound...
May 7, 2018: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/29735531/smad4-deficiency-impairs-chondrocyte-hypertrophy-via-the-runx2-transcription-factor-in-mouse-skeletal-development
#11
Jianyun Yan, Jun Li, Jun Hu, Lu Zhang, Chengguo Wei, Nishat Sultana, Xiaoqiang Cai, Weijia Zhang, Chen-Leng Cai
Chondrocyte hypertrophy is the terminal step in chondrocyte differentiation and is crucial for endochondral bone formation. How signaling pathways regulate chondrocyte hypertrophic differentiation remains incompletely understood. In this study, using a Tbx18:Cre (Tbx18Cre/+) gene-deletion approach, we selectively deleted the gene for the signaling protein SMAD family member 4 (Smad4f/f) in the limbs of mice. We found that the Smad4-deficient mice develop a prominent shortened limb, with decreased expression of chondrocyte differentiation markers, including Col2a1 and Acan, in the humerus at mid-to-late gestation...
May 7, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29728330/validated-computational-framework-for-efficient-systematic-evaluation-of-osteoporotic-fracture-fixation-in-the-proximal-humerus
#12
Peter Varga, Jason A Inzana, Boyko Gueorguiev, Norbert P Südkamp, Markus Windolf
The high rate of fixation failure in osteoporotic proximal humerus fractures indicate the need for improved solutions. Computer simulations may help to overcome the limitations of the gold standard biomechanical testing in evaluating the performance of new implants and enhance the effectivity and outcome of the design process. This study presents a framework for automated computational analysis that facilitates efficient and systematic evaluation of proximal humerus fracture plating under a variety of conditions including bone quality, fracture pattern, implant configuration and loading regime...
May 1, 2018: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29727900/diagnosis-and-treatment-of-infraspinatus-tendon-bursa-ossification-in-a-eurasian-dog
#13
Julia Ungru, Stephan Hungerbühler, Wolfgang Henninger, Petra Klupiec, Julia Bödeker, Anna Langer, Michael Fehr, Oliver Harms
A 4-year-old male Eurasian Dog presented at our veterinary clinic with a history of perpetual forelimb lameness in both thoracic limbs. In the clinical exploration, direct pressure over the infraspinatus tendon of insertion caused pain in both thoracic forelimbs and a firm band-like structure was palpable. No improvement was observed after treatment with rest, non-steroidal anti-inflammatory drugs and an intralesional injection of a long-acting glucocorticoid. Radiographic examination, ultrasonographic exploration and computed tomography were performed, identifying ossified structures lateral to the proximal humerus and an irregular roughened periosteum at the insertion and tendon of the infraspinatus muscle on both sides...
April 2018: Tierärztliche Praxis. Ausgabe K, Kleintiere/Heimtiere
https://www.readbyqxmd.com/read/29727895/in-vivo-axial-humero-ulnar-rotation-in-normal-and-dysplastic-canine-elbow-joints
#14
Thomas Rohwedder, Martin Fischer, Peter Böttcher
OBJECTIVE: To prospectively compare relative axial (internal-external) humero-ulnar rotation in normal and dysplastic canine elbow joints. MATERIAL AND METHODS: Six normal elbows (five dogs) and seven joints (six dogs) with coronoid disease were examined. After implantation of 0.8 mm tantalum beads into humerus and ulna, biplanar x-ray movies of the implanted elbows were taken while dogs were walking on a treadmill. Based on the 2D bead coordinates of the synchronized x-ray movies virtual 3D humero-ulnar animations were calculated...
April 2018: Tierärztliche Praxis. Ausgabe K, Kleintiere/Heimtiere
https://www.readbyqxmd.com/read/29725711/metachronous-multicentric-giant-cell-tumour-of-bone
#15
Navatha Vangala, Shantveer G Uppin, Sobiya Mehnaz Ayesha, K R Harshavardhana, P Chandrasekhar
Metachronous multicentric giant cell tumour (GCT) of bone is rare. We report a case of a 21-year-old man with metachronous multicentric GCTs, with five (including one recurrence) documented lesions reported over a span of 9 years involving various sites, which included the fifth metacarpal bone of the right hand, the intermediate cuneiform bone of the right foot, the left proximal humerus and the lateral malleolus of the right tibia. The radiological appearance of these lesions in these various sites with correlation among clinical history, histopathology and the treatment approach is described in this report...
May 3, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29725515/a-limb-threatening-long-arterial-dissection-caused-by-humerus-neck-fracture-a-case-report
#16
R Kurnaz, M Ikizler, M Ozbayburtlu, T Gunes
Proximal humerus fracture is a common arm trauma and rarely occurs with vascular injury which however is a serious complication. In this case report, we present a long segment dissection of the axillary and brachial arteries as a rare complication due to fragmented proximal humerus fracture and shoulder dislocation. An 80-year old female patient was seen at the emergency department. Radiograph examination has revealed a fragmented proximal humerus fracture besides dislocation of the head of humerus towards the axillary area...
March 2018: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/29724420/acr-appropriateness-criteria-%C3%A2-shoulder-pain-traumatic
#17
Behrang Amini, Nicholas M Beckmann, Francesca D Beaman, Daniel E Wessell, Stephanie A Bernard, R Carter Cassidy, Gregory J Czuczman, Jennifer L Demertzis, Bennett S Greenspan, Bharti Khurana, Kenneth S Lee, Leon Lenchik, Kambiz Motamedi, Akash Sharma, Eric A Walker, Mark J Kransdorf
Traumatic shoulder pain is pain directly attributed to a traumatic event, either acute or chronic. This pain may be the result of either fracture (the clavicle, scapula, or proximal humerus) or soft-tissue injury (most commonly of the rotator cuff, acromioclavicular ligaments, or labroligamentous complex). Imaging assessment of traumatic shoulder pain begins with conventional radiography and, depending on physical examination findings, will require MRI or MR arthrography for assessment of soft-tissue injuries and CT for delineation of fracture planes...
May 2018: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/29721649/malunited-lateral-condyle-fracture-of-humerus-with-elbow-dislocation-a-diagnostic-dilemma
#18
Parmanand Gupta, Munish Sood, Sandeep Gupta, Ravi Gupta
Fracture of lateral condyle with dislocation of the elbow joint is rare in pediatric age. Diagnosis and management of these injuries could be a challenge. Delayed presentation of such injuries could be mistaken for a malunited supracondylar fracture of the humerus and treatment of these injuries remains controversial. We present 2 such cases, where the diagnosis of dislocation of elbow was missed at initial presentation and caused diagnostic confusion at late presentation. The problems faced in the diagnosis of these injuries and the management of late presenting cases are discussed...
May 2, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29720015/outcomes-of-vacuum-assisted-vaginal-deliveries-of-mothers-with-gestational-diabetes-mellitus
#19
Dana Vitner, Liran Hiersch, Eran Ashwal, Daniel Nassie, Yariv Yogev, Amir Aviram
OBJECTIVE: To evaluate the outcomes of vacuum-assisted vaginal deliveries (VAD) among neonates of mothers with gestational diabetes mellitus (GDM). STUDY DESIGN: Retrospective cohort study of women with singleton gestation ≥37 + 0 weeks of gestation who underwent VAD at a single, tertiary, medical center (2007-2014). Women with GDM and their neonates were compared to women without diabetes and their neonates. Composite neonatal outcome was defined as ≥1 of the following: shoulder dystocia, 5-min Apgar score <7, asphyxia, seizure, subgaleal, subarachnoid or subdural hemorrhage, fracture of the clavicle, humerus or skull, or Erb's palsy...
May 2, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29719012/proximal-humerus-fracture-3-d-modeling
#20
Krishn Khanna, Eugene W Brabston, Usama Qayyum, Thomas R Gardner, William N Levine, Charles M Jobin, Christopher S Ahmad
The objective of this study is to determine the reproducibility and feasibility of using 3-dimensional (3-D) computer simulation of proximal humerus fracture computed tomography (CT) scans for fracture reduction. We hypothesized that anatomic reconstruction with 3-D models would be anatomically accurate and reproducible. Preoperative CT scans of 28 patients with 3- and 4-part (AO classification 11-B1, 11-B2, 11-C1, 11-C2) proximal humerus fractures who were treated by hemiarthroplasty were converted into 3-D computer models...
April 2018: American Journal of Orthopedics
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