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https://www.readbyqxmd.com/read/28537800/advanced-mri-techniques-for-the-hip-joint-focus-on-the-postoperative-hip
#1
Jennifer L Berkowitz, Hollis G Potter
OBJECTIVE: Imaging the hip joint with optimized MRI protocol parameters provides the radiologist with the ability to reliably diagnose complex hip abnormalities. The institution of appropriate metal artifact reduction techniques and dedicated sequences can enhance visualization of the periprosthetic bone and soft tissues and allow improved detection of the more frequently encountered total hip arthroplasty-related conditions, such as mechanical loosening, polyethylene wear, and adverse local tissue reactions...
May 24, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28534175/-aseptic-loosening-of-total-ankle-replacement-two-stage-revision-with-bone-augmentation-of-osseous-defects-and-secondary-prosthesis-implantation
#2
A Barg, M Wiewiorski, V Valderrabano
OBJECTIVE: To remove loosened ankle prosthesis components, perform osseous defect augmentation, and reimplant definitive prosthesis components to preserve ankle range of motion. INDICATIONS: Aseptic loosening of the tibial and/or talar ankle prosthesis components with substantial bone defect. CONTRAINDICATIONS: General surgical/anesthesiological risks, infections, critical soft tissue conditions, nonmanageable hindfoot instability, neurovascular impairment of the lower extremity, neuroarthropathy, substantial nonreconstructable osseous defects with or without cysts on the tibial and/or talar side, noncompliance, primary total ankle replacement (TAR) using intramedullary fixation (stem fixation), severely reduced bone quality, insulin-dependent diabetes mellitus, smoking, unrealistic patients' expectations, high activity in sports...
May 22, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28529869/septic-arthritis-of-the-shoulder-with-proximal-humerus-osteomyelitis-treated-by-ilizarov-shoulder-arthrodesis
#3
John Kendall, Martin McNally
Septic arthritis of the shoulder can destroy the glenohumeral joint resulting in significant pain, instability and poor function. Surgical treatment is notoriously difficult with significant risk of complications. Shoulder arthrodesis has been performed using both internal and external fixation but has high complication rates in the presence of infection. We present our experience of managing a patient with significant pain and loss of function as a result of septic arthritis of the shoulder following infected proximal humeral fracture fixation with associated proximal humeral osteomyelitis...
2017: J Bone Jt Infect
https://www.readbyqxmd.com/read/28526267/neurological-heterotopic-ossification-current-understanding-and-future-directions
#4
Rhys D Brady, Sandy R Shultz, Stuart J McDonald, Terence J O'Brien
Neurological heterotopic ossification (NHO) involves the formation of bone in soft tissue following a neurological condition, of which the most common are brain and spinal cord injuries. NHO often forms around the hip, knee and shoulder joints, causing severe pain and joint deformation which is associated with significant morbidity and reduced quality of life. The cellular and molecular events that initiate NHO have been the focus of an increasing number of human and animal studies over the past decade, with this work largely driven by the need to unearth potential therapeutic interventions to prevent the formation of NHO...
May 16, 2017: Bone
https://www.readbyqxmd.com/read/28525884/training-volume-and-soft-tissue-injury-in-professional-and-non-professional-rugby-union-players-a-systematic-review
#5
Shane Ball, Mark Halaki, Rhonda Orr
AIM: To investigate the relationship between training volume and soft tissue injury incidence, and characterise soft tissue injury in rugby union players. DESIGN: A systematic search of electronic databases was performed. The search strategy combined terms covering: training volume and injury, and rugby union, and players of all levels. DATA SOURCES: Medline, SPORTDiscus, Web of Science, Embase, PubMed. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Studies were included if they reported: male rugby union players, a clear definition of a rugby union injury, the amount of training volume undertaken by participants, and epidemiological data for soft-tissue injuries including the number or incidence...
October 8, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28523427/-total-ankle-arthroplasty-with-simultaneous-subtalar-fusion
#6
J Mainzer, P Rippstein
OBJECTIVE: Pain free weight bearing ability with orthograde hindfoot position and preserved tibiotalar motion. INDICATIONS: Symptomatic arthritis of the ankle and subtalar joint, additional subtalar hindfoot malalignment. CONTRAINDICATIONS: Absolute: acute infection, noncorrectable ligamentous instability or bony defects, restricted perfusion, diabetic foot syndrome. Relative: inability to comply with postoperative partial weight bearing, only moderate symptoms of subtalar arthritis, smoking, intricate soft tissue situation...
May 18, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28516447/metacarpophalangeal-joint-injury-patterns-on-magnetic-resonance-imaging-a-comparison-in-racing-standardbreds-and-thoroughbreds
#7
Julien Olive, Nicolas Serraud, Thibault Vila, Jean-Philippe Germain
The metacarpal condyle has received extensive attention as a predominant site of overload arthropathy in racehorses. However, detailed descriptions of MRI lesion patterns for the metacarpophalangeal joint and comparisons between types of racing horses are currently lacking. Aims of this retrospective, cross-sectional study were to describe and compare standing low-field magnetic resonance findings in the metacarpophalangeal joints for groups of Standardbreds and Thoroughbreds using systematic semiquantitative scores...
May 17, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28516223/two-stage-revision-hip-arthroplasty-in-periprosthetic-joint-infection-comparison-study-with-or-without-the-use-of-a-spacer
#8
Dariusz Marczak, Marek Synder, Marcin Sibiński, Michał Polguj, Julian Dudka, Jacek Kowalczewski
PURPOSE: The aim of this study was to compare two methods of two-stage surgery for PJI (periprosthetic joint infection) after THA (total hip arthroplasty): one with and one without the use of an antibiotic-loaded cement spacer. METHODS: This retrospective study was performed on 99 consecutive patients (99 hips) with a minimum follow-up of 24 months. Patients were divided into two groups: (1) in whom the operation was performed using a spacer, and (2) for whom a spacer was not used...
May 18, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28515597/tibial-periosteal-ganglion-cyst-the-ganglion-in-disguise
#9
Anjuna Reghunath, Mahesh K Mittal, Geetika Khanna, V Anil
Soft tissue ganglions are commonly encountered cystic lesions around the wrist presumed to arise from myxomatous degeneration of periarticular connective tissue. Lesions with similar pathology in subchondral location close to joints, and often simulating a geode, is the less common entity called intraosseous ganglion. Rarer still is a lesion produced by mucoid degeneration and cyst formation of the periostium of long bones, rightly called the periosteal ganglion. They are mostly found in the lower extremities at the region of pes anserinus, typically limited to the periosteum and outer cortex without any intramedullary component...
January 2017: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/28515060/barriers-and-facilitators-experienced-in-collaborative-prospective-research-in-orthopaedic-oncology-a-qualitative-study
#10
J S Rendon, M Swinton, N Bernthal, M Boffano, T Damron, N Evaniew, P Ferguson, M Galli Serra, W Hettwer, P McKay, B Miller, L Nystrom, W Parizzia, P Schneider, A Spiguel, R Vélez, K Weiss, J P Zumárraga, M Ghert
OBJECTIVES: As tumours of bone and soft tissue are rare, multicentre prospective collaboration is essential for meaningful research and evidence-based advances in patient care. The aim of this study was to identify barriers and facilitators encountered in large-scale collaborative research by orthopaedic oncological surgeons involved or interested in prospective multicentre collaboration. METHODS: All surgeons who were involved, or had expressed an interest, in the ongoing Prophylactic Antibiotic Regimens in Tumour Surgery (PARITY) trial were invited to participate in a focus group to discuss their experiences with collaborative research in this area...
May 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28507643/imaging-of-complications-after-limb-prostheses-implantation-in-children-with-bone-tumors
#11
Beata Iwanowska, Hanna Brągoszewska, Jarosław Mądzik, Sylwia Szkudlińska-Pawlak, Izabela Kopyś-Wiszniewska, Małgorzata Jastrzębska, Barbara Kowalska, Maria Uliasz, Monika Bekiesińska-Figatowska
BACKGROUND: Tumors of the developmental age are an important problem in clinical practice. Primary bone tumors constitute 1-1.5% of all tumors, and 7% of all tumors diagnosed in the developmental age. The aim of the study was to assess the capabilities of imaging methods in diagnosing complications of limb endoprostheses in children with osteoarticular tumors. MATERIAL/METHODS: We included 155 patients with limb endoprostheses, aged 7-26 years. There were 113 patients with knee prostheses, 1 patient with bilateral knee prostheses, 16 patients with shoulder prostheses, 14 patients with hip prostheses, 11 patients with hip and knee prostheses, and 1 patient with a femoral prosthesis...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28499921/anterior-cruciate-ligament-soft-tissue-graft-fixation-in-the-elderly-is-there-a-reason-to-use-interference-screws-a-human-cadaver-study
#12
Christoph Domnick, Mirco Herbort, Michael J Raschke, Sarah Habermann, Benedikt Schliemann, Wolf Petersen, André Weimann
PURPOSE: To analyze the ultimate failure load, yield load, stiffness, and cyclic resistance of different anterior cruciate ligament (ACL) soft tissue graft fixation techniques in osteopenic bone. METHODS: In this study, 24 fresh-frozen human cadaveric tibiae (mean age 82.6 years; range 56-96; 6 male and 6 female donors) were used. Quantitative computed tomography was performed to match bone density. Looped porcine flexor tendon grafts were chosen as ACL graft substitutes for tibial graft fixation techniques (n = 8 each): (1) hybrid fixation with an interference screw and extracortical button fixation; (2) extracortical button fixation; and (3) interference screw fixation...
May 9, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28499812/modeling-of-the-interaction-between-grip-force-and-vibration-transmissibility-of-a-finger
#13
John Z Wu, Daniel E Welcome, Thomas W McDowell, Xueyan S Xu, Ren G Dong
It is known that the vibration characteristics of the fingers and hand and the level of grip action interacts when operating a power tool. In the current study, we developed a hybrid finger model to simulate the vibrations of the hand-finger system when gripping a vibrating handle covered with soft materials. The hybrid finger model combines the characteristics of conventional finite element (FE) models, multi-body musculoskeletal models, and lumped mass models. The distal, middle, and proximal finger segments were constructed using FE models, the finger segments were connected via three flexible joint linkages (i...
May 9, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28497248/-aseptic-loosening-of-total-ankle-replacement-one-stage-revision-ankle-arthroplasty
#14
G Pagenstert, M D Wimmer, M Jacxsens, C L Saltzman, A Barg
OBJECTIVE: To revise one or both loosened prosthesis components, to achieve postoperative pain relief, and preserve ankle range of motion. INDICATIONS: Aseptic loosening of the tibial and/or talar ankle prosthesis components without substantial bone defect of the tibial or talar bone stock. CONTRAINDICATIONS: General surgical or anesthesiological risks, infections, critical soft tissue conditions, nonmanageable hindfoot instability, neurovascular impairment of the lower extremity, neuroarthropathy (e...
May 11, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28476202/periodontal-ligament-entheses-and-their-adaptive-role-in-the-context-of-dentoalveolar-joint-function
#15
REVIEW
Jeremy D Lin, Andrew T Jang, Michael P Kurylo, Jonathan Hurng, Feifei Yang, Lynn Yang, Arvin Pal, Ling Chen, Sunita P Ho
OBJECTIVE: The dynamic bone-periodontal ligament (PDL)-tooth fibrous joint consists of two adaptive functionally graded interfaces (FGI), the PDL-bone and PDL-cementum that respond to mechanical strain transmitted during mastication. In general, from a materials and mechanics perspective, FGI prevent catastrophic failure during prolonged cyclic loading. This review is a discourse of results gathered from literature to illustrate the dynamic adaptive nature of the fibrous joint in response to physiologic and pathologic simulated functions, and experimental tooth movement...
May 2, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28475981/soft-tissue-artifact-causes-significant-errors-in-the-calculation-of-joint-angles-and-range-of-motion-at-the-hip
#16
Niccolo M Fiorentino, Penny R Atkins, Michael J Kutschke, Justine M Goebel, K Bo Foreman, Andrew E Anderson
Soft tissue movement between reflective skin markers and underlying bone induces errors in gait analysis. These errors are known as soft tissue artifact (STA). Prior studies have not examined how STA affects hip joint angles and range of motion (ROM) during dynamic activities. Herein, we: 1) measured STA of skin markers on the pelvis and thigh during walking, hip abduction and hip rotation, 2) quantified errors in tracking the thigh, pelvis and hip joint angles/ROM, and 3) determined whether model constraints on hip joint degrees of freedom mitigated errors...
March 31, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28474269/intra-operative-fiducial-based-ct-fluoroscope-image-registration-framework-for-image-guided-robot-assisted-joint-fracture-surgery
#17
Giulio Dagnino, Ioannis Georgilas, Samir Morad, Peter Gibbons, Payam Tarassoli, Roger Atkins, Sanja Dogramadzi
PURPOSE: Joint fractures must be accurately reduced minimising soft tissue damages to avoid negative surgical outcomes. To this regard, we have developed the RAFS surgical system, which allows the percutaneous reduction of intra-articular fractures and provides intra-operative real-time 3D image guidance to the surgeon. Earlier experiments showed the effectiveness of the RAFS system on phantoms, but also key issues which precluded its use in a clinical application. This work proposes a redesign of the RAFS's navigation system overcoming the earlier version's issues, aiming to move the RAFS system into a surgical environment...
May 4, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28469926/primary-hypertrophic-osteoarthropathy-due-to-a-novel-slco2a1-mutation-masquerading-as-acromegaly
#18
Ruth Mangupli, Adrian F Daly, Elvia Cuauro, Paul Camperos, Jaime Krivoy, Albert Beckers
SUMMARY: A 20-year-old man with an 8-year history of progressive enlargement of his hands and feet, coarsening facial features, painful joints and thickened, oily skin was referred for investigation of acromegaly. On examination, the subject was of normal height and weight. He had markedly increased skin thickness around the forehead, eyelids and scalp with redundant skin folds. Bilateral painful knee swelling was accompanied by enlargement of the extremities, and his fingers were markedly clubbed...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28461966/management-of-the-first-episode-of-traumatic-shoulder-dislocation
#19
REVIEW
Michele Boffano, Stefano Mortera, Raimondo Piana
Shoulder joint dislocation is the most common joint dislocation seen in the emergency department.Traumatic dislocation may cause damage to the soft-tissues surrounding the shoulder joint and sometimes to the bone. The treatment, which aims at restoration of a fully functioning, pain-free and stable shoulder, includes either conservative or surgical management preceded by closed reduction of the acute dislocation.Conservative management usually requires a period of rest, generally involving immobilisation of the arm in a sling, even though it is still debated whether to immobilise the shoulder in internal or external rotation...
February 2017: EFORT Open Rev
https://www.readbyqxmd.com/read/28450316/the-combined-use-of-kartogenin-and-platelet-rich-plasma-promotes-fibrocartilage-formation-in-the-wounded-rat-achilles-tendon-entheses
#20
J Zhang, T Yuan, N Zheng, Y Zhou, M V Hogan, J H-C Wang
OBJECTIVES: After an injury, the biological reattachment of tendon to bone is a challenge because healing takes place between a soft (tendon) and a hard (bone) tissue. Even after healing, the transition zone in the enthesis is not completely regenerated, making it susceptible to re-injury. In this study, we aimed to regenerate Achilles tendon entheses (ATEs) in wounded rats using a combination of kartogenin (KGN) and platelet-rich plasma (PRP). METHODS: Wounds created in rat ATEs were given three different treatments: kartogenin platelet-rich plasma (KGN-PRP); PRP; or saline (control), followed by histological and immunochemical analyses, and mechanical testing of the rat ATEs after three months of healing...
April 2017: Bone & Joint Research
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