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Acta Orthopaedica

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https://www.readbyqxmd.com/read/27910738/cartilage-repair-in-the-degenerative-ageing-knee
#1
Mats Brittberg, Andreas H Gomoll, José A Canseco, Jack Far, Martin Lind, James Hui
Background and purpose - Cartilage damage can develop due to trauma, resulting in focal chondral or osteochondral defects, or as more diffuse loss of cartilage in a generalized organ disease such as osteoarthritis. A loss of cartilage function and quality is also seen with increasing age. There is a spectrum of diseases ranging from focal cartilage defects with healthy surrounding cartilage to focal lesions in degenerative cartilage, to multiple and diffuse lesions in osteoarthritic cartilage. At the recent Aarhus Regenerative Orthopaedics Symposium (AROS) 2015, regenerative challenges in an ageing population were discussed by clinicians and basic scientists...
December 2, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27892801/stability-and-migration-across-femoral-varus-derotation-osteotomies-in-children-with-neuromuscular-disorders
#2
Peter Buxbom, Stig Sonne-Holm, Niels Ellitsgaard, Christian Wong
Background and purpose - Studies have indicated that one-third of children with cerebral palsy (CP) develop dislocation of the hip that needs surgical intervention. When hip dislocation occurs during childhood surgical treatment consists of tenotomies, femoral varus derotation osteotomy (VDRO), and acetabuloplasty. Relapse is observed in one-fifth of cases during adolescence. In this prospective cohort study, we performed a descriptive evaluation of translation and rotation across VDROs in children with neuromuscular disorders and syndromes by radiostereometric analysis (RSA)...
November 28, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27892754/amputation-following-internal-fixation-of-an-ankle-fracture-via-the-posterolateral-approach-a-case-report
#3
Henrik Sandelin, Erkki Tukiainen, Mikko Ovaska
No abstract text is available yet for this article.
November 28, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27892753/severe-hip-displacement-reduces-health-related-quality-of-life-in-children-with-cerebral-palsy
#4
Kjersti Ramstad, Reidun B Jahnsen, Terje Terjesen
Background and purpose - Hip displacement is common in children with severe cerebral palsy (CP) and can cause problems such as pain, contractures, and nursing difficulties. Caregiver priorities and child health index of life with disabilities (CPCHILD) is a recently developed measure of health-related quality of life (HRQL) in children with severe CP. The associations between CPCHILD scores and hip displacement have not been investigated. We explored the effect of hip displacement on HRQL. Patients and methods - 67 children were recruited from the population-based Norwegian CP register...
November 28, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27892748/are-porous-tantalum-cups-superior-to-conventional-reinforcement-rings
#5
Anders Brüggemann, Erik Fredlund, Hans Mallmin, Nils P Hailer
Background and purpose - Porous tantalum cups have been introduced as an alternative to various reinforcement rings in revision hip surgery. We hypothesized that porous tantalum cups would be superior to Müller acetabular roof reinforcement rings (MARRs) in revision hip surgery with re-revision for aseptic loosening as the primary outcome measure. Patients and methods - 207 hips operated with either a porous tantalum cup (TM cup, n = 111) or a MARR (n = 96) at index procedure were identified in our local arthroplasty register...
November 28, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27892743/muscle-strength-and-knee-range-of-motion-after-femoral-lengthening
#6
Anil Bhave, Lior Shabtai, Erik Woelber, Arman Apelyan, Dror Paley, John E Herzenberg
Background and purpose - Femoral lengthening may result in decrease in knee range of motion (ROM) and quadriceps and hamstring muscle weakness. We evaluated preoperative and postoperative knee ROM, hamstring muscle strength, and quadriceps muscle strength in a diverse group of patients undergoing femoral lengthening. We hypothesized that lengthening would not result in a significant change in knee ROM or muscle strength. Patients and methods - This prospective study of 48 patients (mean age 27 (9-60) years) compared ROM and muscle strength before and after femoral lengthening...
November 28, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27882814/the-ao-pediatric-comprehensive-classification-of-long-bone-fractures-pccf-part-iii
#7
Laurent Audigé, Theddy Slongo, Nicolas Lutz, Andrea Blumenthal, Alexander Joeris
Background and purpose - The AO Pediatric Comprehensive Classification of Long Bone Fractures (PCCF) describes the localization and morphology of fractures, and considers severity in 2 categories: (1) simple, and (2) multifragmentary. We evaluated simple and multifragmentary fractures in a large consecutive cohort of children diagnosed with long bone fractures in Switzerland. Patients and methods - Children and adolescents treated for fractures between 2009 and 2011 at 2 tertiary pediatric surgery hospitals were retrospectively included...
November 24, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27882811/the-ao-pediatric-comprehensive-classification-of-long-bone-fractures-pccf-part-ii
#8
Alexander Joeris, Nicolas Lutz, Andrea Blumenthal, Theddy Slongo, Laurent Audigé
Background and purpose - To achieve a common understanding when dealing with long bone fractures in children, the AO Pediatric Comprehensive Classification of Long Bone Fractures (AO PCCF) was introduced in 2007. As part of its final validation, we present the most relevant fracture patterns in the lower extremities of a representative population of children classified according to the PCCF. Patients and methods - We included patients up to the age of 17 who were diagnosed with 1 or more long bone fractures between January 2009 and December 2011 at either of 2 tertiary care university hospitals in Switzerland...
November 24, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27882808/no-degeneration-found-in-focal-cartilage-defects-evaluated-with-dgemric-at-12-year-follow-up
#9
Cathrine Nørstad Engen, Sverre Løken, Asbjørn Årøen, Charles Ho, Lars Engebretsen
Background and purpose - The natural history of focal cartilage defects (FCDs) is still unresolved, as is the long-term cartilage quality after cartilage surgery. It has been suggested that delayed gadolinium-enhanced magnetic resonance imaging of cartilage (dGEMRIC) is a biomarker of early OA. We aimed to quantitatively evaluate the articular cartilage in knees with FCDs, 12 years after arthroscopic diagnosis. Patients and methods - We included 21 patients from a cohort of patients with knee pain who underwent arthroscopy in 1999...
November 24, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27882802/the-ao-pediatric-comprehensive-classification-of-long-bone-fractures-pccf-part-i
#10
Alexander Joeris, Nicolas Lutz, Andrea Blumenthal, Theddy Slongo, Laurent Audigé
Background and purpose - To achieve a common understanding when dealing with long bone fractures in children, the AO Pediatric Comprehensive Classification of Long Bone Fractures (AO PCCF) was introduced in 2007. As part of its final validation, we present the most relevant fracture patterns in the upper extremities of a representative population of children classified according to the PCCF. Patients and methods - We included children and adolescents (0-17 years old) diagnosed with 1 or more long bone fractures between January 2009 and December 2011 at the university hospitals in Bern and Lausanne (Switzerland)...
November 24, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27879150/acetabular-cup-position-and-risk-of-dislocation-in-primary-total-hip-arthroplasty
#11
Kurt G Seagrave, Anders Troelsen, Henrik Malchau, Henrik Husted, Kirill Gromov
Background and purpose - Hip dislocation is one of the most common complications following total hip arthroplasty (THA). Several factors that affect dislocation have been identified, including acetabular cup positioning. Optimal values for cup inclination and anteversion are debatable. We performed a systematic review to describe the different methods for measuring cup placement, target zones for cup positioning, and the association between cup positioning and dislocation following primary THA. Methods - A systematic search of literature in the PubMed database was performed (January and February 2016) to identify articles that compared acetabular cup positioning and the risk of dislocation...
November 23, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27875063/the-diagnosis-you-wish-you-had-never-operated-on-pyoderma-gangrenosum-misdiagnosed-as-necrotizing-fasciitis-a-case-report
#12
Eva Hradil, Charlotte Jeppsson, Nils Hamnerius, Åke Svensson
No abstract text is available yet for this article.
November 22, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27841713/bone-cement-product-and-failure-in-total-knee-arthroplasty
#13
Øystein Birkeland, Birgitte Espehaug, Leif I Havelin, Ove Furnes
Background and purpose - The bone cement market for total knee arthroplasty (TKA) in Norway has been dominated by a few products and distributors. Palacos with gentamicin had a market share exceeding 90% before 2005, but it was then withdrawn from the market and replaced by new slightly altered products. We have compared the survival of TKAs fixated with Palacos with gentamicin with the survival of TKAs fixated with the bone cements that took over the market. Patients and methods - Using data from the Norwegian Arthroplasty Register for the period 1997-2013, we included 26,147 primary TKAs in the study...
November 14, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27841712/comparison-of-dual-mobility-cup-and-unipolar-cup-for-prevention-of-dislocation-after-revision-total-hip-arthroplasty
#14
Amanda Inez Gonzalez, Placido Bartolone, Anne Lubbeke, Elise Dupuis Lozeron, Robin Peter, Pierre Hoffmeyer, Panayiotis Christofilopoulos
Background and purpose - Revision total hip arthroplasty (THA) is associated with higher dislocation rates than primary THA. We compared the risk of dislocation within 6 months and all-cause re-revision during the whole study period using either the dual-mobility cup or the unipolar cup. Methods - We used a prospective hospital registry-based cohort including all total and cup-only revision THAs performed between 2003 and 2013. The cups used were either dual-mobility or unipolar; the choice was made according to the preference of the surgeon...
November 14, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27841708/modulation-of-fixation-stiffness-from-flexible-to-stiff-in-a-rat-model-of-bone-healing
#15
Nicole Bartnikowski, Lutz E Claes, Lidia Koval, Vaida Glatt, Ronny Bindl, Roland Steck, Anita Ignatius, Michael A Schuetz, Devakara R Epari
Background and purpose - Constant fixator stiffness for the duration of healing may not provide suitable mechanical conditions for all stages of bone repair. We therefore investigated the influence of stiffening fixation on callus stiffness and morphology in a rat diaphyseal osteotomy model to determine whether healing time was shortened and callus stiffness increased through modulation of fixation from flexible to stiff. Material and methods - An external unilateral fixator was applied to the osteotomized femur and stiffened by decreasing the offset of the inner fixator bar at 3, 7, 14, and 21 days after operation...
November 14, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27841692/predictive-factors-for-re-displacement-in-diaphyseal-forearm-fractures-in-children-role-of-radiographic-indices
#16
Shadi Asadollahi, Masoumeh Pourali, Kamran Heidari
Background and purpose - Manipulation and cast immobilization is the primary management for diaphyseal forearm fractures in children, and re-displacement is the most common complication. We wanted (1) to analyze the incidence of re-displacement in a group of children treated with close reduction and casting; (2) to determine predictive factors such as demographics, mechanism of injury, affected bone, fracture pattern, degree of initial displacement and angulation, and reduction accuracy; and (3) to determine the prognostic effect of previously defined radiographic indices...
November 14, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27805460/posterior-approach-compared-to-direct-lateral-approach-resulted-in-better-patient-reported-outcome-after-hemiarthroplasty-for-femoral-neck-fracture
#17
Torbjørn B Kristensen, Tarjei Vinje, Leif I Havelin, Lars B Engesæter, Jan-Erik Gjertsen
Background and purpose - Hemiarthroplasty (HA) is the most common treatment for displaced femoral neck fractures in many countries. In Norway, there has been a tradition of using the direct lateral surgical approach, but worldwide a posterior approach is more often used. Based on data from the Norwegian Hip Fracture Register, we compared the results of HA operated through the posterior and direct lateral approaches regarding patient-reported outcome measures (PROMs) and reoperation rate. Patients and methods - HAs due to femoral neck fracture in patients aged 60 years and older were included from the Norwegian Hip Fracture Register (2005-2014)...
November 2, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27798972/signs-of-knee-osteoarthritis-common-in-620-patients-undergoing-arthroscopic-surgery-for-meniscal-tear
#18
Kenneth Pihl, Martin Englund, L Stefan Lohmander, Uffe Jørgensen, Nis Nissen, Jeppe Schjerning, Jonas B Thorlund
Background and purpose - Recent evidence has questioned the effect of arthroscopic knee surgery for middle-aged and older patients with degenerative meniscal tears with or without concomitant radiographic knee osteoarthritis (OA). We investigated the prevalence of early or more established knee OA and patients' characteristics in a cohort of patients undergoing arthroscopic surgery for a meniscal tear. Patients and methods - 641 patients assigned for arthroscopy on suspicion of meniscus tear were consecutively recruited from February 2013 through January 2015...
November 1, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27794622/mobile-bearing-medial-unicompartmental-knee-arthroplasty-restores-limb-alignment-comparable-to-that-of-the-unaffected-contralateral-limb
#19
Arun B Mullaji, Siddharth Shah, Gautam M Shetty
Background and purpose - Medial unicompartmental knee arthroplasty (UKA) is undertaken in patients with a passively correctable varus deformity. We investigated whether restoration of natural soft tissue tension would result in a lower limb alignment similar to that of the contralateral unaffected lower limb after mobile-bearing medial UKA. Patients and methods - In this retrospective study, hip-knee-ankle (HKA) angle, position of the weight-bearing axis (WBA), and knee joint line obliquity (KJLO) after mobile-bearing medial UKA was compared with that of the unaffected (clinically and radiologically) contralateral lower limb in 123 patients...
October 31, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27781667/peripheral-snap-fit-locking-mechanisms-and-smooth-surface-finish-of-tibial-trays-reduce-backside-wear-in-fixed-bearing-total-knee-arthroplasty
#20
Łukasz Łapaj, Adrian Mróz, Paweł Kokoszka, Jacek Markuszewski, Justyna Wendland, Celina Helak-Łapaj, Jacek Kruczyński
Background and purpose - Severe backside wear, observed in older generations of total knee replacements (TKRs), led to redesign of locking mechanisms to reduce micromotions between tibial tray and inlay. Since little is known about whether this effectively reduces backside wear in modern designs, we examined backside damage in retrievals of various contemporary fixed-bearing TKRs. Patients and methods - A consecutive series of 102 inlays with a peripheral (Stryker Triathlon, Stryker Scorpio, DePuy PFC Sigma, Aesculap Search Evolution) or dovetail locking mechanism (Zimmer NexGen, Smith and Nephew Genesis II) was examined...
October 26, 2016: Acta Orthopaedica
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