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Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society

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https://www.readbyqxmd.com/read/28520086/activated-fgfr3-prevents-subchondral-bone-sclerosis-during-the-development-of-osteoarthritis-in-transgenic-mice-with-achondroplasia
#1
Toshiaki Okura, Masaki Matsushita, Kenichi Mishima, Ryusaku Esaki, Taisuke Seki, Naoki Ishiguro, Hiroshi Kitoh
The purpose of this study is to investigate the morphometric changes of the subchondral bone during the development of osteoarthritis (OA) in transgenic mice with achondroplasia (Fgfr3(ach) ) carrying a heterozygous gain-of-function mutation in Fgfr3. Two OA models (spontaneously developed with age: the aging model, and surgically induced by destabilization of the medial meniscus: the DMM model) were established. Articular cartilage, epiphysis and metaphysis of the knee joint were histologically and morphometrically compared between wild-type mice and Fgfr3(ach) mice in both OA models...
May 18, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28513993/patient-report-outcome-measures-in-orthopaedics
#2
REVIEW
Joel J Gagnier
Patient reported outcome measures (PROMs) are key tools when performing clinical research and PROM data are increasingly used to inform clinical decision-making, patient-centered care, health policy and more recently, reimbursement decisions. PROMs must possess particular properties before they are used. Thus purpose of this paper is to give an overview of PROMs, their definition, how their evidence can be assessed, how they should be reported in clinical research, how to choose PROMs, the types of PROMs available in orthopaedics, where these measures can be found, PROMs in orthopaedic clinical practice and what are some key next steps in this field...
May 17, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28513981/exposure-to-fermentation-supernatant-of-staphylococcus-aureus-accelerated-dedifferentiation-of-chondrocytes-and-production-of-antimicrobial-peptides
#3
Shuaijun Li, Yun Zhang, Yidan Sun, Weigang Cao, Lei Cui
Staphylococcus aureus is the most popular pathogen found in septic arthritis. Despite bacteria was eradicated from joint cavity during acute infection, destruction of articular cartilage often continues for years, leading to permanent joint damage. The mechanism responsible for this consistent catabolic reaction in septic arthritis remains unclear. Here, we found that fermentation supernatant (FS) of Staphylococcus aureus accelerated dedifferentiation of chondrocytes and induced expression of catabolic factors including A Disintegrin-like and Metalloproteinase with Thrombospondin-1 motifs 5, NO synthase 2, matrix metalloproteinase -3, -13...
May 17, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28513889/mechanically-induced-bone-formation-is-not-sensitive-to-local-osteocyte-density-in-rat-vertebral-cancellous-bone
#4
Erin N Cresswell, Thu M Nguyen, Michael W Horsfield, Adrian J Alepuz, Thomas A Metzger, Glen L Niebur, Christopher J Hernandez
Osteocytes play an integral role in bone by sensing mechanical stimuli and releasing signaling factors that direct bone formation. The importance of osteocytes in mechanotransduction suggests that regions of bone tissue with greater osteocyte populations are more responsive to mechanical stimuli. To determine the effects of osteocyte population on bone functional adaptation we applied mechanical loads to the 8(th) caudal vertebra of skeletally mature female Sprague Dawley rats (6 months of age, n = 8 loaded, n = 8 sham controls)...
May 17, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28513885/biomechanical-function-of-a-balloon-nucleus-pulposus-replacement-system-a-human-cadaveric-spine-study
#5
Taekyeong Lee, Tae-Hong Lim, Sang-Heon Lee, Joo-Han Kim, Junghwa Hong
With recent advances in motion-sparing techniques in spine surgery, disc nucleus replacement (DNR) has been introduced as a viable method to restore the biomechanical functions of the spine. Several methods of DNR have been proposed in the literature. However, the risk of device migration or extrusion is a major issue that should be addressed for a successful DNR. DNR using a balloon nucleus (BN) filled with pressurized fluid may be capable of reducing such risks while preserving the advantages of DNR. The objective of this study was to investigate the biomechanical functionalities of the human cadaveric lumbar motion segments with a custom made BN filled with saline at internal fluid pressure of 0...
May 17, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28485534/assessment-of-thermal-damage-in-total-knee-arthroplasty-using-an-osteocyte-injury-model
#6
Kosaku Kurata, Junpei Matsushita, Atsushi Furuno, Junichi Fujino, Hiroshi Takamatsu
Polymethylmethacrylate bone cement has been widely used for the anchorage of artificial implants in various orthopedic surgeries. Although it is one of the most successful biomaterials in use, excess heat generation intrinsically causes thermal damage to bone cells adjacent to the bone cement. To estimate a risk of thermal injury, a response of bone cells to cement polymerization must be elucidated because of the occurrence of thermal damage. Thermal damage is affected not only by maximal temperature but also by exposure time, temperature history, and cell type...
May 9, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28485509/the-biologic-response-of-human-anterior-cruciate-ligamentocytes-on-collagen-patches-to-platelet-rich-plasma-formulations-with-and-without-leucocytes
#7
Anna M Krismer, Romina S Cabra, Rahel D May, Daniela A Frauchiger, Sandro Kohl, Sufian S Ahmad, Benjamin Gantenbein
Due to the poor self-healing capacities of the anterior cruciate ligament, previous primary repair attempts have failed. To enhance biologic healing, platelet rich plasma and collagen scaffold have shown promise in animal models. Platelet rich plasma (PRP) is already used in several clinical applications although outcomes are quite debated. The purpose of this study was to examine the effects of different PRP formulations during 21 days: with leucocytes and pure PRP on human anterior cruciate ligament-derived ligamentocytes grown on collagen patches in 3D cell cultures in vitro...
May 9, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28485507/the-effect-of-impact-assembly-on-the-interface-deformation-and-fretting-corrosion-of-modular-hip-tapers-an-in-vitro-study
#8
Anna Panagiotidou, Timothy Cobb, Jay Meswania, John Skinner, Alister Hart, Fares Haddad, Gordon Blunn
Wear and corrosion at the modular head-neck junction has been recognised to be a potential clinical concern, with multiple reports on adverse local tissue reactions and subsequent early failure of metal-on-metal hip replacements. Furthermore, reports on head-neck taper corrosion are also being described with conventional metal-on-polyethylene bearings. Manufacturing tolerances, surgical technique, non-axial alignment, material combination, high frictional torque and high bending moment have all been implicated in the failure process...
May 9, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28485477/serum-creatinine-and-albumin-predict-sarcoma-specific-survival-in-patients-with-myofibroblastic-and-fibroblastic-sarcomas
#9
Madeleine Willegger, Florian Posch, Sophie Schieder, Philipp Theodor Funovics, Anke Scharrer, Thomas Brodowicz, Cihan Ay, Reinhard Windhager, Joannis Panotopoulos
Recent evidence suggests that common prognostic factors predicting disease progression and survival in soft tissue sarcomas (STS) are not applicable to all STS entities, indicating the need for histotype specific evaluation of new prognosticators. This study aimed at evaluating preoperative serum creatinine, albumin and the albumin-creatinine ratio (ACR) as markers for survival in patients with malignant fibroblastic and myofibroblastic sarcomas. 132 patients who underwent sarcoma resection have been included...
May 9, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28480978/lumbar-multifidus-muscle-degenerates-in-individuals-with-chronic-degenerative-lumbar-spine-pathology
#10
Bahar Shahidi, James C Hubbard, Michael C Gibbons, Severin Ruoss, Vinko Zlomislic, R Todd Allen, Steven R Garfin, Samuel R Ward
Histological and cell-level changes in the lumbar musculature in individuals with chronic lumbar spine degenerative conditions are not well characterized. Although prior literature supports evidence of changes in fiber type and size, little information exists describing the tissue quality and biology of pathological features of muscle in this population. The purpose of this study was to quantify multifidus tissue composition and structure, inflammation, vascularity, and degeneration in individuals with chronic degenerative lumbar spine pathology...
May 8, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28471537/orientation-changes-in-the-cruciate-ligaments-of-the-knee-during-skeletal-growth-a-porcine-model
#11
Stephanie G Cone, Sean G Simpson, Jorge A Piedrahita, Lynn A Fordham, Jeffrey T Spang, Matthew B Fisher
Musculoskeletal injuries in pediatric patients, including significant increases in anterior cruciate ligament (ACL) injuries, are on the rise. Previous studies have found major anatomical changes during skeletal growth in the soft tissues of the knee. Specifically, the ACL and the posterior cruciate ligament (PCL) change in their relative orientation to the tibial plateau throughout growth. In order to develop age-specific treatments for ACL injuries the purpose of this study was to characterize orientation changes in the cruciate ligaments of the Yorkshire pig, a common pre-clinical model, during skeletal growth in order to verify the applicability of this model for pediatric musculoskeletal studies...
May 4, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28471533/murine-articular-cartilage-morphology-and-compositional-quantification-with-high-resolution-cationic-contrast-enhanced-%C3%AE-ct
#12
Maleeha Mashiatulla, Meghan M Moran, Deva Chan, Jun Li, Jonathan D Freedman, Brian D Snyder, Mark W Grinstaff, Anna Plaas, D Rick Sumner
Articular cartilage lines the load-bearing surfaces of long bones and undergoes compositional and structural degeneration during osteoarthritis progression. Contrast enhanced microcomputed tomography (μCT) is being applied to a variety of preclinical models, including the mouse, to map structural and compositional properties in 3-D. The thinness (˜30-50 μm) and high cellularity of mouse articular cartilage presents a significant imaging challenge. Our group previously showed that mouse articular cartilage and proteoglycan (PG) content can be assessed by μCT with the ioxagalate-based contrast agent Hexabrix, but the voxel size used (6 μm) was deemed to be barely adequate...
May 4, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28471509/predictors-of-multidimensional-functional-outcomes-after-total-knee-arthroplasty
#13
Nicholas A Cooper, Barbara A Rakel Rn, M Bridget Zimmerman, Shalome M Tonelli, Keela Herr Rn, Charles R Clark, Nicolas O Noiseux, John J Callaghan, Kathleen A Sluka
Multiple assessments are used clinically after total knee arthroplasty (TKA) including self-report, performance tasks, and physical activity levels. It is unclear if these different functional assessments are interchangeable or if they measure different constructs. The objective of this study was to characterize different functional measures before and after TKA. We characterized function before and after TKA using perceived function (KOOS ADL), physical performance (gait speed), and daily activity (steps/day via accelerometry); compared function in people undergoing TKA to age-matched healthy controls; and examined characteristics of those undergoing TKA for potential predictors of postoperative function...
May 4, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28470887/rotator-cuff-muscle-degeneration-and-tear-severity-related-to-myogenic-adipogenic-and-atrophy-genes-in-human-muscle
#14
Shivam A Shah, Ioannis Kormpakis, Leonardo Cavinatto, Megan L Killian, Stavros Thomopoulos, Leesa M Galatz
Large rotator cuff tear size and advanced muscle degeneration can affect reparability of tears and compromise tendon healing. Clinicians often rely on direct measures of rotator cuff tear size and muscle degeneration from magnetic resonance imaging (MRI) to determine whether the rotator cuff tear is repairable. The objective of this study was to identify the relationship between gene expression changes in rotator cuff muscle degeneration to standard data available to clinicians. Radiographic assessment of preoperative rotator cuff tear severity was completed for 25 patients with varying magnitudes of rotator cuff tears...
May 4, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28467655/microcalcification-of-lumbar-spine-intervertebral-discs-and-facet-joints-is-associated-with-cartilage-degeneration-but-differs-in-prevalence-and-its-relation-to-age
#15
Thelonius Hawellek, Jan Hubert, Sandra Hischke, Tim Rolvien, Matthias Krause, Klaus Püschel, Wolfgang Rüther, Andreas Niemeier
Cartilage calcification (CC) is associated with degeneration in non-vertebral joints, but little is known about CC and lumbar vertebral joints. The goal of this study was to analyze the prevalence of CC in lumbar facet joints (FJ) and intervertebral discs (IVD) and its relation to cartilage degeneration and age in a non-selected cohort of the general population. The segment L4/5 of 85 consecutive donors (mean age 61.9 years) was analyzed by high-resolution imaging digital-contact radiography (DCR). Quantification was achieved by measuring CC in % of total cartilage area...
May 3, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28467648/building-better-bone-the-weaving-of-biologic-and-engineering-strategies-for-managing-bone-loss
#16
Andrew M Schwartz, Mara L Schenker, Jaimo Ahn, Nick J Willett
Segmental bone loss remains a challenging clinical problem for orthopaedic trauma surgeons. In addition to the missing bone itself, the local tissues (soft tissue, vascular) are often highly traumatized as well, resulting in a less than ideal environment for bone regeneration. As a result, attempts at limb salvage become a highly expensive endeavor, often requiring multiple operations and necessitating the use of every available strategy (autograft, allograft, bone graft substitution, Masquelet, bone transport, etc...
May 3, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28462520/zirconia-phase-transformation-in-retrieved-wear-simulated-and-artificially-aged-ceramic-femoral-heads
#17
Maria Parkes, Kathryn Sayer, Markus Goldhofer, Philippa Cann, William L Walter, Jonathan Jeffers
Zirconia in Zirconia toughened alumina ceramic hip replacements exists in an unstable state and can transform in response to stress giving the material improved fracture toughness. Phase transformation also occurs under hydrothermal conditions such as exist in vivo. To predict the hydrothermal aging that will occur in vivo accelerated aging procedures have been used, but validation of these models requires the study of retrieved hip joints. Here 26 retrievals are analysed to determine the degree of phase transformation in vivo...
April 29, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28460421/calreticulin-inhibits-inflammation-induced-osteoclastogenesis-and-bone-resorption
#18
Charla R Fischer, Maya Mikami, Hiroshi Minematsu, Saqib Nizami, Heon Goo Lee, Danielle Stamer, Neel Patel, Do Yu Soung, Jung-Ho Back, Lee Song, Hicham Drissi, Francis Y Lee
Osteoclasts play key roles in bone remodeling and pathologic osteolytic disorders such as inflammation, infection, bone implant loosening, rheumatoid arthritis, metastatic bone cancers, and pathological fractures. Osteoclasts are formed by the fusion of monocytes in response to receptor activators of NF-ĸB-ligand (RANKL) and macrophage colony stimulating factor 1 (M-CSF). Calreticulin (CRT), a commonly known intracellular protein as a calcium-binding chaperone, has an unexpectedly robust anti-osteoclastogenic effect when its recombinant form is applied to osteoclast precursors in vitro or at the site of bone inflammation externally in vivo...
April 29, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28460415/articular-cartilage-surface-roughness-as-an-imaging-based-morphological-indicator-of-osteoarthritis-a-preliminary-investigation-of-osteoarthritis-initiative-subjects
#19
Michael D Newton, Jeffrey Osborne, Karisssa Gawronski, Kevin C Baker, Tristan Maerz
Current imaging-based morphometric indicators of osteoarthritis (OA) using whole-compartment mean cartilage thickness (MCT) and volume changes can be insensitive to mild degenerative changes of articular cartilage (AC) due to areas of adjacent thickening and thinning. The purpose of this preliminary study was to evaluate cartilage thickness-based surface roughness as a morphometric indicator of OA. 3D magnetic resonance imaging (MRI) datasets were collected from osteoarthritis initiative (OAI) subjects with Kellgren-Lawrence (KL) OA grades of 0, 2, and 4 (n = 10/group)...
April 29, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28452065/trabecular-resorption-patterns-of-cement-bone-interlock-regions-in-total-knee-replacements
#20
Jacklyn R Goodheart, Mark A Miller, Megan E Oest, Kenneth A Mann
With in vivo service there is loss of mechanical interlock between trabeculae and PMMA cement in total knee replacements. The mechanisms responsible for the loss of interlock are not known, but loss of interlock results in weaker cement-bone interfaces. The goal of this study was to determine the pattern of resorption of interdigitated bone using a series of 20 postmortem retrieved knee replacements with a wide range of time in service (3 to 22 years). MicroCT scans were obtained of a segment of the cement-bone interface below the tibial tray for each implant...
April 27, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
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