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https://www.readbyqxmd.com/read/29055244/a-pilot-study-comparing-mechanical-properties-of-tissue-engineered-cartilages-and-various-endogenous-cartilages
#1
Andrew K Pappa, Sajjad Soleimani, Montserrat Caballero, Alexandra E Halevi, John A van Aalst
BACKGROUND: Mechanical properties of tissue-engineered cartilage and a variety of endogenous cartilage were measured. The main goal was to evaluate if the tissue-engineered cartilage have similar mechanical characteristics to be replaced with rib cartilage in microtia reconstruction. Such study lays the foundation for future human clinical trials for microtia reconstruction. METHOD: Atomic force microscopy and compression testing were used to measure the viscoelasticity of tissue-engineered cartilage (stem cell seeded on Poly lactic co-glycolytic acid nanofibers and Pellet) and endogenous cartilage: conchal bowl, microtic ears, preauricular remnants, and rib...
October 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29054109/influence-of-backside-loading-on-the-floating-mass-transducer-an-in-vitro-experimental-study
#2
Antoniu-Oreste Gostian, Martin Sylvester Otte, David Pazen, Magdalene Ortmann, David Schwarz, Karl Bernd Hüttenbrink, Dirk Beutner
HYPOTHESIS: The vibration of the floating mass transducer (FMT) of a single active middle-ear implant (AMEI) is distinctly influenced by the properties of the material coupled to its back side. BACKGROUND: In round window vibroplasty, the FMT needs to be padded against the surrounding bone opposite from the round window membrane. This represents one factor influencing its performance as a round window driver. Therefore, we examined the effects of different materials linked to the back side of an FMT on its vibration range...
October 20, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29053533/use-of-a-single-anatomic-donor-site-for-harvesting-a-full-thickness-skin-graft-and-a-free-cartilage-graft-for-nasal-defects
#3
Jessica Olander, Melanie Wong, Mariah Brown
No abstract text is available yet for this article.
October 19, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/29052742/-triple-arthrodesis-for-correction-of-cavovarus-deformity
#4
REVIEW
A Barg, R Ruiz, B Hintermann
OBJECTIVE: The aim is to correct the underlying cavovarus deformity and to achieve a pain-free and stable hindfoot. INDICATIONS: Rigid neurologic, posttraumatic, congenital, and idiopathic cavovarus deformities. CONTRAINDICATIONS: General surgical or anesthesiological risks, infections, critical soft tissue conditions, neurovascular impairment of the lower extremity, noncompliance, patients with severely reduced bone quality, insulin-dependent diabetes mellitus, smoking...
October 20, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/29052350/platelet-lysate-activates-quiescent-cell-proliferation-and-reprogramming-in-human-articular-cartilage-involvement-of-hypoxia-inducible-factor-1
#5
Van Thi Nguyen, Ranieri Cancedda, Fiorella Descalzi
The idea of rescuing the body self-repair capability lost during evolution is progressively gaining ground in Regenerative Medicine. In particular, growth factors and bioactive molecules derived from activated platelets emerged as promising therapeutic agents acting as trigger for repair of tissue lesions and restoration of tissue functions. Aim of this study was to assess the potential of a Platelet Lysate (PL) for human articular cartilage repair considering its activity on progenitor cells and differentiated chondrocytes...
October 19, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29051901/fresh-osteochondral-allograft-transplantation-for-spontaneous-osteonecrosis-of-the-knee-a-case-series
#6
Luís E P Tírico, Samuel A Early, Julie C McCauley, William D Bugbee
BACKGROUND: Spontaneous osteonecrosis of the knee (SONK) is a clinical entity identified by acute knee pain usually associated with joint effusion, with radiographic findings of a radiolucent defect on the weightbearing area of the femoral condyle. Conservative treatment is initially undertaken; however, surgical procedures are often necessary. Historically, surgical options have included core decompression, cartilage repair, high tibial osteotomy, or joint arthroplasty. Few studies in the literature have reported the use of fresh osteochondral allograft (OCA) for the treatment of SONK lesions...
October 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29051896/outcomes-and-complication-rates-after-primary-anterior-cruciate-ligament-reconstruction-are-similar-in-younger-and-older-patients
#7
Mark E Cinque, Jorge Chahla, Gilbert Moatshe, Nicholas N DePhillipo, Nicholas I Kennedy, Jonathan A Godin, Robert F LaPrade
BACKGROUND: Until recently, anterior cruciate ligament (ACL) tears in older patients were treated conservatively; however, these patients often experienced significant pain and instability. PURPOSE/HYPOTHESIS: The purpose of this study was to compare the patient-reported outcomes, patient satisfaction, and failure rates of primary ACL reconstruction between a younger (age 20-30 years) and older (age 50-75 years) patient cohort. It was hypothesized that patients in the older cohort could achieve comparable clinical outcomes and retear rates following ACL reconstruction with a bone-tendon-bone autograft or allograft compared with the younger patients...
October 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29051872/synovial-hemangioma-of-the-knee-management-and-excellent-outcome-2-years-after-arthroscopic-synovectomy-in-a-25-year-old-male-with-a-20-year-history
#8
Akshdeep Singh Bawa, Rajnish Garg, Kaneeka Bhatnagar, Shekhar Singal
INTRODUCTION: Synovial hemangioma is a rare condition with <200 published case reports in world literature and is frequently misdiagnosed, leading to diagnostic delay of many years. This delay is even more significant if the patient comes from a rural background with a dearth of medical facilities in the area. This case had a lag of nearly 20 years from the time of onset of symptoms and the required management which is the maximum reported for any synovial hemangioma since most of them have been found and treated in adolescents...
May 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29051828/intubation-following-high-dose-rocuronium-in-a-cat-with-protracted-laryngospasm
#9
Graeme M Doodnaught, Daniel Sj Pang
CASE SUMMARY: An 11-year-old spayed female domestic shorthair cat with a history of laryngospasm at induction of general anesthesia presented for dental evaluation and treatment. The cat was premedicated with hydromorphone (0.05 mg/kg) and alfaxalone (0.5 mg/kg) intravenously, pre-oxygenated for 5 mins (3 l/min, face mask) and anesthesia was induced with alfaxalone (to effect) intravenously. Lidocaine (0.1 ml, 2%) was applied topically to the arytenoid cartilages following loss of jaw tone...
July 2017: JFMS open reports
https://www.readbyqxmd.com/read/29051809/impact-of-expansion-and-redifferentiation-under-hypothermia-on-chondrogenic-capacity-of-cultured-human-septal-chondrocytes
#10
Achim von Bomhard, Joseph Faust, Alexander F Elsaesser, Silke Schwarz, Katharina Pippich, Nicole Rotter
A critical limitation in the cultivation of cartilage for tissue engineering is the dedifferentiation in chondrocytes, mainly during in vitro amplification. Despite many previous studies investigating the influence of various conditions, no data exist concerning the effects of hypothermia. Our aim has been to influence chondrocyte dedifferentiation in vitro by hypothermic conditions. Chondrocytes were isolated from cartilage biopsies and seeded in monolayer and in three-dimensional pellet-cultures. Each cell culture was either performed at 32...
January 2017: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29050433/effect-of-the-addition-of-glycosaminoglycans-on-bone-and-cartilaginous-development-of-broiler-chickens
#11
Sarah Sgavioli, Elaine T Santos, Liliana L Borges, Giuliana M Andrade-Garcia, Diana M C Castiblanco, Vitor R Almeida, Rodrigo G Garcia, Antônio C Shimano, Irenilza A Nääs, Silvana M Baraldi-Artoni
Locomotion issues in broiler production may decrease performance (carcass yield and traits) and lead to high financial losses. This study evaluates the addition of glucosaminoglycans in broiler diets to minimize the lack of proper bone development and joint weakening. The experiment was conducted using 2,160 broilers randomly distributed in a factorial pattern (3 × 3) using 3 levels of glucosamine sulfate (0, 0.12, and 0.24%) and 3 levels of chondroitin sulfate addition (0, 0.08, and 0.16%). Eight repetitions were used for each treatment, distributed in 72 pens with 30 broilers each...
September 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/29050153/-study-on-the-differentiation-of-rat-bone-marrow-mesenchymal-stem-cells-into-chondrocytes-induced-by-tgf-beta-3
#12
D B Liu, X S Han, W L Huang, J Deng, R F She
Objective: To explore the methods for the differentiation of rat bone marrow mesenchymal stem cells (BMMSCs) into chondrocytes induced by transforming growth factor (TGF)-beta 3 in vitro, and search for a reliable seed cell for the regeneration and repair of articular cartilage in osteoarthritis. Methods: SD rat femoral and tibial BMMSCs were cultured by the whole bone marrow adherent method, and then the purity was identified by flow cytometry. P3 generation cells were induced and differentiated into chondrocytes by the induction of differentiation medium containing TGF-beta 3, and cell chondrogenic differentiation ability at different induction time points was detected...
September 26, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29050090/-laryngotracheal-resection-and-reconstruction-for-the-treatment-of-acquired-laryngotracheal-stenosis
#13
L J Ma, Y Xiao, Q W Yang, J Wang
Objective: To analyze the efficacy of laryngotracheal resection and reconstruction for acquired laryngotracheal stenosis, and to discuss the prevention of complication. Methods: The clinical outcomes of seventy patients with acquired laryngotracheal stenosis, treated with laryngotracheal resection and reconstruction were retrospectively reviewed between January 2007 and December 2016. The degree of stenosis was classified according to Myer-Cotton classification as follows: grade Ⅱ(n=7), grade Ⅲ(n=38) and grade Ⅳ(n=27)...
October 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/29049810/the-use-of-ultrasound-in-the-management-of-a-life-threatening-malignant-laryngotracheal-obstruction
#14
Alfonso Fiorelli, Gaetana Messina, Antonio Raucci, Mario Santini
Ultrasound is becoming a valuable diagnostic tool in the armamentarium of thoracic surgeons. We report its use to follow stent placement in the laryngotracheal position for management of life-threatening neoplastic obstruction. For this purpose, a 15-MHz linear probe was placed in the midline at the level of the cricoid cartilage. Ultrasound performed daily at bedside showed normal movement of vocal folds and no stent dislocation. This strategy may be an alternative to computed tomography scan or endoscopy to follow stent placement in extrathoracic airways...
September 26, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049670/an-alternative-method-to-characterize-the-quasi-static-non-linear-material-properties-of-murine-articular-cartilage
#15
Alexander Kotelsky, Chandler W Woo, Luis F Delgadillo, Michael S Richards, Mark R Buckley
With the onset and progression of osteoarthritis (OA), articular cartilage (AC) mechanical properties are altered. These alterations can serve as an objective measure of tissue degradation. Although the mouse is a common and useful animal model for studying OA, it is extremely challenging to measure the mechanical properties of murine AC due to its small size (thickness < 50 um). In this study, we developed novel and direct approach to independently quantify two quasi-static mechanical properties of mouse AC: the load-dependent (non-linear) solid matrix Young's modulus (E) and drained Poisson ratio (v)...
October 10, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29049142/13-93b3-bioactive-glass-a-new-scaffold-for-transplantation-of-stem-cell-derived-chondrocytes
#16
Kivanc Gunhan, Serkan Bariskan, Uzdan Uz, Seda Vatansever, Mujde Kivanc
Research using animal models gives human trials hope for recovery in many fields of regenerative medicine, although they are sometimes poor predictors for human experiences. Our goal was to investigate whether rat chondrocytes, differentiated from adipose-derived stem cells, could be transplanted using a new, easily shaped, bioactive glass scaffold, and to show the immunohistochemical results. Intraperitoneal and retroperitoneal adipose tissue was extracted from 6 male Wistar albino type rats. The fatty tissue samples were fragmented and incubated...
October 18, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29048769/in-vivo-implantation-of-a-tissue-engineered-stem-cell-seeded-hemi-laryngeal-replacement-maintains-airway-phonation-and-swallowing-in-pigs
#17
P Herrmann, T Ansari, A Southgate, A Varanou Jenkins, L Partington, C Carvalho, S Janes, M Lowdell, P Sibbons, M A Birchall
BACKGROUND: Laryngeal functional impairment relating to swallowing, vocalisation and respiration can be life changing and devastating for patients. A tissue engineering approach to regenerating vocal folds would represent a significant advantage over current clinical practice. METHOD: Porcine hemi-larynx were de-cellularised under negative pressure. The resultant acellular scaffold was seeded with human bone marrow derived mesenchymal stem cells and primary human epithelial cells...
October 19, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29048690/large-fresh-osteochondral-allografts-for-the-hip-growing-the-evidence
#18
Lasun O Oladeji, James L Cook, James P Stannard, Brett D Crist
INTRODUCTION: Articular cartilage lesions of the hip are difficult to effectively treat. Osteochondral allograft (OCA) transplantation in the knee has been associated with long-term success, but OCA for the hip has not been extensively studied. Here, we present the clinical and radiological outcomes from a cohort of 10 patients treated with fresh OCA transplants for large osteochondral defects of the femoral head and/or acetabulum. METHODS: 10 patients who had undergone osteochondral allograft transplantation of the femoral head and/or acetabulum at our institution between 2013 and 2016 were identified from our Institutional Review Board-approved registry...
October 17, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29047310/reserve-or-resident-progenitors-in-cartilage-comparative-analysis-of-chondrocytes-versus-chondroprogenitors-and-their-role-in-cartilage-repair
#19
Elizabeth Vinod, P R J V C Boopalan, Solomon Sathishkumar
Introduction Articular cartilage is made up of hyaline tissue embodying chondrocytes, which arise from mesenchymal stromal cells (MSCs) and specialized extracellular matrix. Despite possessing resident progenitors in and around the joint primed for chondrogenesis, cartilage has limited intrinsic capacity of repair and cell turnover. Advances in isolation, culture, and characterization of these progenitors have raised the possibility for their use in cell-based cartilage repair. Chondroprogenitors (CPCs) have been classified as MSCs and have been postulated to play a vital role in injury response and are identified by their colony forming ability, proliferative potential, telomere dynamics, multipotency, and expression of stem cell markers...
October 1, 2017: Cartilage
https://www.readbyqxmd.com/read/29047243/three-dimensional-fast-spin-echo-imaging-without-fat-suppression-of-the-knee-diagnostic-accuracy-comparison-to-fat-suppressed-imaging-on-1-5t-mri
#20
Hee Woo Cho, Jin Suck Suh, Jin Oh Park, Hyoung Sik Kim, Soo Yoon Chung, Young Han Lee, Seok Hahn
PURPOSE: To evaluate the diagnostic performance of three-dimensional fast spin-echo (3D FSE-Cube) without fat suppression (NFS) for detecting knee lesions, using comparison to 3D FSE-Cube with fat suppression (FS). MATERIALS AND METHODS: One hundred twenty-four patients who underwent 1.5T knee magnetic resonance imaging (MRI) scans and 25 subsequent arthroscopic surgeries were retrospectively reviewed. Using arthroscopic results and two-dimensional images as reference standards, diagnostic performances of 3D FSE-Cube-NFS and FS imaging about lesions of ligament, meniscus, subchondral bone marrow edema (BME), and cartilage were compared...
November 2017: Yonsei Medical Journal
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