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Juvenile Cartilage

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https://www.readbyqxmd.com/read/29110501/first-metatarsal-head-osteochondral-defect-treatment-with-particulated-juvenile-cartilage-allograft-transplantation-a-case-series
#1
Bryan Van Dyke, Gregory C Berlet, Justin L Daigre, Christopher F Hyer, Terrence M Philbin
BACKGROUND: Focal damage to articular cartilage, also called an osteochondral defect (OCD), can be a cause of pain and decreased range of motion. Recent advancements have led to transplantation techniques using particulated juvenile articular cartilage allograft. This technique has been applied to the first metatarsal head to a very limited degree, with no published results to our knowledge. The aim of this study was to review the clinical results of patients who underwent particulated juvenile cartilage allograft implantation for first metatarsal head OCDs...
November 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/29103840/the-influence-of-full-thickness-chondral-defects-on-outcomes-following-meniscal-allograft-transplantation-a-comparative-study
#2
Bryan M Saltzman, Maximilian A Meyer, Timothy S Leroux, Matthew E Gilelis, Margot Debot, Adam B Yanke, Brian J Cole
PURPOSE: To compare a series of patients who underwent meniscus allograft transplantation (MAT) with full-thickness chondral defects (FTD) with those with no chondral defect (ND) with regard to the following: change in patient-reported outcomes (PROs) from baseline to 2-year follow-up and baseline to the final follow-up (including comparisons to minimal clinically important differences), complications and complication rates, reoperations and reoperation rates/timing, and failures and time to failure (revision MAT or conversion to total knee arthroplasty)...
November 2, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29096706/human-ipsc-derived-chondrocytes-mimic-juvenile-chondrocyte-function-for-the-dual-advantage-of-increased-proliferation-and-resistance-to-il-1%C3%AE
#3
Jieun Lee, Piera Smeriglio, Constance R Chu, Nidhi Bhutani
BACKGROUND: Induced pluripotent stem cells (iPSC) provide an unlimited patient-specific cell source for regenerative medicine. Adult cells have had limited success in cartilage repair, but juvenile chondrocytes (from donors younger than 13 years of age) have been identified to generate superior cartilage. With this perspective, the aim of these studies was to compare the human iPSC-derived chondrocytes (hiChondrocytes) to adult and juvenile chondrocytes and identify common molecular factors that govern their function...
November 2, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29093250/-values-of-fat-saturation-sequence-in-mri-for-juvenile-arthritis
#4
Jiapei Wang, Ling Wu, Shiling Zhong, Hanchun Yu, Yazhen Di, Mengjiao Shen, Nan Sun
To explore the values of fat saturation sequence in MRI for juvenile arthritis.
 Methods: A total of 1 131 cases with juvenile arthritis and 1 601 with symptomatic arthritis were examined by MRI normal T1 weighted imaging (T1WI) and T2 weighted imaging (T2WI) sequence and spectral presaturation attenuatedinversion recovery (SPAIR) T2 fat saturation sequence. All the images were independently evaluated by two senior doctors from the Department of Radiology and the Department of Pediatric Rheumatology and Immunology respectively to confirm the types and degree of pathological changes of joint tissues...
October 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/29040232/in-vitro-effect-of-vancomycin-on-the-viability-of-articular-chondrocytes
#5
K Aaron Shaw, Josef K Eichinger, Nischal Nadig, Stephen A Parada
OBJECTIVES: To characterize the in-vitro toxicity of vancomycin on articular cartilage. METHODS: Osteochondral samples extracted from fresh, juvenile porcine stifle (knee) joints were exposed to vancomycin-saline concentrations of 2, 5, and 10 mg/ml and compared to a saline and non-saline treated control. Comparison chondrocyte viability was assessed with histology examination of chondrocyte degeneration using the Mankin criteria and a live/dead staining using ethidium homodimer-2 and calcien acetoxymethylester (AM) stain and confocal laser scanning microscopy...
October 7, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29036754/patellofemoral-cartilage-restoration-indications-techniques-and-outcomes-of-autologous-chondrocytes-implantation-matrix-induced-chondrocyte-implantation-and-particulated-juvenile-allograft-cartilage
#6
https://www.readbyqxmd.com/read/28992420/improved-chondrotoxic-profile-of-liposomal-bupivacaine-compared-with-standard-bupivacaine-after-intra-articular-infiltration-in-a-porcine-model
#7
K Aaron Shaw, Colleen Moreland, Jeremy Jacobs, Justin M Hire, Richard Topolski, Nathan Hoyt, Stephen A Parada, Craig D Cameron
BACKGROUND: Increasingly, liposomal bupivacaine is being used with multimodal pain management strategies. In vitro investigations have shown decreased chondrotoxicity profiles for liposomal bupivacaine; however, there is no evidence regarding its in vivo effects. Hypothesis/Purpose: This study sought to investigate the in vivo chondrotoxicity of liposomal bupivacaine, hypothesizing that there would be increased chondrocyte viability after exposure to liposomal bupivacaine when compared with standard bupivacaine...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28986634/contrast-enhanced-mri-findings-of-the-knee-in-healthy-children-establishing-normal-values
#8
Robert Hemke, J Merlijn van den Berg, Charlotte M Nusman, E Charlotte van Gulik, Anouk M Barendregt, Dieneke Schonenberg-Meinema, Koert M Dolman, Taco W Kuijpers, Mario Maas
OBJECTIVES: To define normative standards for the knee in healthy children using contrast-enhanced MRI, focusing on normal synovial membrane thickness. Secondly, presence of joint fluid and bone marrow oedema was evaluated. METHODS: For this study, children without disorders potentially resulting in (accompanying) arthritis were included. Patients underwent clinical assessments, followed by contrast-enhanced MRI. MRI features were evaluated in consensus using the Juvenile Arthritis MRI Scoring (JAMRIS) system...
October 6, 2017: European Radiology
https://www.readbyqxmd.com/read/28979588/management-of-osteochondral-lesions-of-the-talar-dome
#9
Chamnanni Rungprai, Joshua N Tennant, Ryan D Gentry, Phinit Phisitkul
Osteochondral lesion of the talus (OLT) is a common condition associated with ankle injury that brings challenges in the diagnosis and treatment. Symptoms related to this condition are nonspecific including pain, swelling, stiffness, and mechanical symptoms of locking and catching. While the natural history of the OLTs is not well understood, surgical treatment is often required especially in chronic cases and acute cases with displaced articular fragments. Arthroscopic treatment of the OLTs aims to restore ankle joint function and pain relief by the removal of the chondral or osteochondral fragment, debridement and stabilization of cartilage rim and subchondral bone, and stimulate healing of the bone and damaged cartilage...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28853913/comparison-of-the-effects-of-osteochondral-autograft-transplantation-with-platelet-rich-plasma-or-platelet-rich-fibrin-on-osteochondral-defects-in-a-rabbit-model
#10
Masahiro Maruyama, Hiroshi Satake, Tomoto Suzuki, Ryusuke Honma, Yasushi Naganuma, Yuya Takakubo, Michiaki Takagi
BACKGROUND: Although osteochondral autograft transplantation (OAT) provides satisfactory outcomes for osteochondral defects, for large defects OAT is often inadequate because of graft availability. Osteochondral allograft transplantation is an alternative treatment for large defects, but this approach is limited by graft storage constraints and carries disease transmission risks. Platelet-rich fibrin (PRF) is a second-generation platelet concentrate, and its positive effect on articular cartilage has been reported...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28832200/use-of-particulated-juvenile-articular-cartilage-allograft-for-osteochondral-lesions-of-the-wrist
#11
Daniel E Hess, Brian C Werner, D Nicole Deal
BACKGROUND: Articular cartilage injuries are a common injury among young, active patients, and the most appropriate treatment for these injuries remains controversial. A promising new technology in the treatment of high-grade cartilage injuries is particulated juvenile articular cartilage (PJAC) allograft (DeNovo NT, Zimmer, Warsaw, Indiana). This has been shown to be successful in multiple joints including the knee, talus, and elbow. No studies or case reports exist in supporting or discouraging its use in injuries of the wrist, in specific, the scaphoid...
September 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28812679/meckel-s-cartilage-breakdown-offers-clues-to-mammalian-middle-ear-evolution
#12
Neal Anthwal, Daniel J Urban, Zhe-Xi Luo, Karen E Sears, Abigail S Tucker
A key transformation in mammalian ear evolution was incorporation of the primary jaw joint of premammalian synapsids into the definitive mammalian middle ear of living mammals. This evolutionary transition occurred in two steps, starting with a partial or 'transitional' mammalian middle ear in which the ectotympanic and malleus were still connected to the mandible by an ossified Meckel's cartilage (MC), as observed in many Mesozoic mammals. This was followed by MC breakdown, freeing the ectotympanic and the malleus from the mandible and creating the definitive mammalian middle ear...
March 6, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28810995/chondrocyte-viability-after-a-simulated-blast-exposure
#13
K Aaron Shaw, Peter C Johnson, David Williams, Steven D Zumbrun, Richard Topolski, Craig D Cameron
OBJECTIVES: The effects of blast exposure have gained increasing interest in the military medical community with their continued occurrence on the battlefield. The impact of the direct and indirect energy imparted from blasts to hollow viscera, as well as closed head injuries, have been well studied. However, the injury to articular cartilage has not been investigated, despite previous correlations regarding the development of osteoarthritis. The purpose of this study was to assess the degree of injury to articular chondrocytes after exposure to a simulated blast overpressure wave...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28810132/short-communication-alteration-in-blood-parameters-by-enrofloxacin-in-juvenile-lesser-spotted-dogfish-scyliorhinus-canicula-linnaeus-1758-after-intramuscular-injection
#14
Annalisa Zaccaroni, Marcos Perez-Lopez, Irene de la Casa Resino, Gianfranco Medri, Fabrizio Ceneri, Simone Bertini, Oliviero Mordenti, Luana Cortinovis, Rubina Sirri, Luciana Mandrioli
Enrofloxacin (EF) is a veterinary drug for respiratory, gastrointestinal and urinary tract infections. Parenteral administration at doses higher than the manufacturer recommended dosage has induced cartilage lesions in juvenile mammals and poultry. In elasmobranchs EF is commonly used for the treatment of infectious diseases, however only one study has been performed previously to evaluate pharmacokinetics and the potential chondrotoxicity of a fluoroquinolone in adult skates. In present study juvenile lesser spotted dogfish (Scyliorhinus canicula, Linnaeus, 1758) were treated with low (LD, 5mg/kg) and high dose (HD, 10mg/kg) of EF daily via intramuscular injection for 15 consecutive days, as indicated in a recognized treatment...
August 10, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28797267/joint-cartilage-thickness-and-automated-determination-of-bone-age-and-bone-health-in-juvenile-idiopathic-arthritis
#15
Marinka Twilt, Dan Pradsgaard, Anne Helene Spannow, Arne Horlyck, Carsten Heuck, Troels Herlin
BACKGROUND: BoneXpert is an automated method to calculate bone maturation and bone health index (BHI) in children with juvenile idiopathic arthritis (JIA). Cartilage thickness can also be seen as an indicator for bone health and arthritis damage. The objective of this study was to evaluate the relation between cartilage thickness, bone maturation and bone health in patients with JIA. METHODS: Patients with JIA diagnosed according ILAR criteria included in a previous ultrasonography (US) study were eligible if hand radiographs were taken at the same time as the US examination...
August 10, 2017: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/28762509/vertebral-column-regionalisation-in-chinook-salmon-oncorhynchus-tshawytscha
#16
A De Clercq, M R Perrott, P S Davie, M A Preece, B Wybourne, N Ruff, A Huysseune, P E Witten
Teleost vertebral centra are often similar in size and shape, but vertebral-associated elements, i.e. neural arches, haemal arches and ribs, show regional differences. Here we examine how the presence, absence and specific anatomical and histological characters of vertebral centra-associated elements can be used to define vertebral column regions in juvenile Chinook salmon (Oncorhynchus tshawytscha). To investigate if the presence of regions within the vertebral column is independent of temperature, animals raised at 8 and 12 °C were studied at 1400 and 1530 degreedays, in the freshwater phase of the life cycle...
July 31, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28758241/in-vivo-phase-imaging-of-human-epiphyseal-cartilage-at-7-t
#17
Barbara Dymerska, Klaus Bohndorf, Paul Schennach, Alexander Rauscher, Siegfried Trattnig, Simon D Robinson
PURPOSE: To assess the potential clinical utility of in vivo susceptibility-weighted imaging and quantitative susceptibility mapping of growth cartilage in the juvenile human knee at 7 T. METHODS: High-resolution gradient-echo images of the knees of six healthy children and adolescents aged 6 to 15 were acquired with a 28-channel coil at 7 T. Phase images from the coils were combined using a short echo-time reference scan method (COMPOSER). RESULTS: Veins oriented perpendicular to the static B0 field appeared doubled in susceptibility-weighted imaging, but not quantitative susceptibility mapping...
July 31, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28747146/age-dependent-subchondral-bone-remodeling-and-cartilage-repair-in-a-minipig-defect-model
#18
Christian G Pfeifer, Matthew B Fisher, Vishal Saxena, Minwook Kim, Elizabeth A Henning, David A Steinberg, George R Dodge, Robert L Mauck
After cartilage injury and repair, the subchondral bone plate remodels. Skeletal maturity likely impacts both bone remodeling and inherent cartilage repair capacity. The objective of this study was to evaluate subchondral bone remodeling as a function of injury type, repair scenario, and skeletal maturity in a Yucatan minipig model. Cartilage defects (4 mm) were created bilaterally in the trochlear groove. Treatment conditions included a full thickness chondral defect (full chondral defect, n = 3 adult/3 juvenile), a partial thickness (∼50%) chondral defect (PCD, n = 3/3), and FCD treated with microfracture (MFX, n = 3/3)...
November 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28696851/us-evaluation-of-juvenile-idiopathic-arthritis-and-osteoarticular-infection
#19
Jie C Nguyen, Kenneth S Lee, Mahesh M Thapa, Humberto G Rosas
Juvenile idiopathic arthritis (JIA) and osteoarticular infection can cause nonspecific articular and periarticular complaints in children. Although contrast material-enhanced magnetic resonance imaging is the reference standard imaging modality, musculoskeletal ultrasonography (US) is emerging as an important adjunct imaging modality that can provide valuable information relatively quickly without use of radiation or the need for sedation. However, diagnostic accuracy requires a systemic approach, familiarity with various US techniques, and an understanding of maturation-related changes...
July 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28639852/osteochondritis-dissecans-etiology-pathology-and-imaging-with-a-special-focus-on-the-knee-joint
#20
Juergen Bruns, Mathias Werner, Christian Habermann
This article is a review of the current understanding of the etiology, pathogenesis, and how to diagnose and treat knee osteochondritis dissecans (OCD) followed by an analysis of and outcomes of the treatments available. OCD is seen in children and adolescents with open growth plates (juvenile OCD) and adults with closed growth plates (adult OCD). The etiology of OCD lesions remains unclear and is characterized by an aseptic necrosis in the subchondral bone area. Mechanical factors seem to play an important role...
June 1, 2017: Cartilage
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