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https://www.readbyqxmd.com/read/29793112/3d-printed-membrane-as-an-alternative-to-amniotic-membrane-for-ocular-surface-conjunctival-defect-reconstruction-an-in-vitro-in-vivo-study
#1
Shima Dehghani, Morteza Rasoulianboroujeni, Hamed Ghasemi, Saeed Heidari Keshel, Zohreh Nozarian, Mohammad Naser Hashemian, Mehran Zarei-Ghanavati, Golshan Latifi, Reza Ghaffari, Zhanfeng Cui, Hua Ye, Lobat Tayebi
BACKGROUND: The aim of this study was to evaluate the surgical handling and clinical applicability of a specific 3D-printed membrane design fabricated using a gelatin, elastin and sodium hyaluronate blend for conjunctival reconstruction and compare it with amniotic membrane (AM), which is normally used in such surgeries. METHODS: 3D printing technique was employed to fabricate the membrane based on gradient design. Prior to printing, rheometry was employed to optimize the ink composition...
May 11, 2018: Biomaterials
https://www.readbyqxmd.com/read/29793088/decellularized-and-matured-esophageal-scaffold-for-circumferential-esophagus-replacement-proof-of-concept-in-a-pig-model
#2
Guillaume Luc, Guillaume Charles, Caroline Gronnier, Magali Cabau, Charlotte Kalisky, Mallory Meulle, Reine Bareille, Samantha Roques, Lionel Couraud, Johanna Rannou, Laurence Bordenave, Denis Collet, Marlène Durand
Surgical resection of the esophagus requires sacrificing a long portion of it. Its replacement by the demanding gastric pull-up or colonic interposition techniques may be avoided by using short biologic scaffolds composed of decellularized matrix (DM). The aim of this study was to prepare, characterize, and assess the in vivo remodeling of DM and its clinical impact in a preclinical model. A dynamic chemical and enzymatic decellularization protocol of porcine esophagus was set up and optimized. The resulting DM was mechanically and biologically characterized by DNA quantification, histology, and histomorphometry techniques...
May 17, 2018: Biomaterials
https://www.readbyqxmd.com/read/29793074/cross-linked-electrospun-cartilage-acellular-matrix-poly-caprolactone-co-lactide-co-glycolide-nanofiber-as-an-antiadhesive-barrier
#3
Jin Woo Lee, Joon Yeong Park, Seung Hun Park, Min Ju Kim, Bo Ram Song, Hee-Woong Yun, Tae Woong Kang, Hak Soo Choi, Young Jick Kim, Byoung Hyun Min, Moon Suk Kim
In this work, we chose cartilage acellular matrix (CAM) as a promising antiadhesive material because CAM effectively inhibits the formation of blood vessels, and we used electrospinning to prepare antiadhesive barriers. Additionally, we synthesized N-hydroxysuccinimide (NHS)-poly(caprolactone-co-lactide-co-glycolide)-NHS (MP) copolymers (to tune degradation) as a cross-linking agent for CAM. This is the first report on the development of electrospun cross-linked (Cx) CAM/MP (CA/P) nanofiber (NF) (Cx-CA/P-NF) with a tunable degradation period as an antiadhesive barrier...
May 21, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29792745/postoperative-mri-of-massive-rotator-cuff-tears
#4
Mohammad Samim, Pamela Walsh, Soterios Gyftopoulos, Robert Meislin, Luis S Beltran
OBJECTIVE: The aim of this article is to review the postoperative MRI appearances of irreparable massive rotator cuff tears (RCTs) after surgery was performed using newer techniques, including patch repair, muscle tendon transfer, superior capsular reconstruction, and subacromial balloon implantation. CONCLUSION: Newer surgical techniques are emerging for the management of massive RCTs. As radiologists become increasingly likely to encounter postoperative imaging studies of RCTs repaired using these techniques, familiarity with the normal postoperative appearances and complications associated with these techniques becomes important...
May 24, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29792527/enteric-neural-stem-cells-expressing-insulin-like-growth-factor-1-a-novel-cellular-therapy-for-hirschsprung-s-disease-in-mouse-model
#5
Wei Liu, Lijuan Zhang, Rongde Wu
Transplanting enteric neural stem cells (ENSCs) is an innovative approach for replacing enteric neurons in Hirschsprung's disease (HSCR). However, posttransplantation cell survival and differentiation limit efficacy. We aimed to investigate whether transplantation of ENSCs engineered with insulin-like growth factor 1 (IGF-1) could improve survival and differentiation of the engrafted cells and promote functional recovery of the aganglionic colon. ENSCs were isolated from the intestine of neonatal mice and genetically modified to express IGF-1...
May 24, 2018: DNA and Cell Biology
https://www.readbyqxmd.com/read/29792513/cardiogenic-shock-complicating-peripartum-cardiomyopathy-importance-of-early-left-ventricular-unloading-and-bromocriptine-therapy
#6
Jan-Thorben Sieweke, Tobias Jonathan Pfeffer, Dominik Berliner, Tobias König, Maximiliane Hallbaum, L Christian Napp, Jörn Tongers, Christian Kühn, Jan D Schmitto, Denise Hilfiker-Kleiner, Andreas Schäfer, Johann Bauersachs
INTRODUCTION: Acute peripartum cardiomyopathy complicated by cardiogenic shock is a rare but life-threatening disease. A prolactin fragment is considered causal for the pathogenesis of peripartum cardiomyopathy. This analysis sought to investigate the role of early percutaneous mechanical circulatory support with micro-axial flow-pumps and/or veno-arterial extracorporeal membrane oxygenation in combination with the prolactin inhibitor bromocriptine in refractory cardiogenic shock complicating peripartum cardiomyopathy...
May 1, 2018: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/29792402/bioabsorbable-polymer-everolimus-eluting-stents-in-patients-with-acute-myocardial-infarction-a-report-from-the-swedish-coronary-angiography-and-angioplasty-registry
#7
Sergio Buccheri, Giovanna Sarno, Bo Lagerqvist, Göran Olivecrona, Kristina Hambraeus, Nils Witt, Daniel Lindholm, David Erlinge, Oskar Angerås, Stefan James
AIMS: The clinical performance of the SYNERGY drug-eluting stent (DES) in patients with acute myocardial infarction (MI) has not been investigated in detail. We sought to report on the outcomes after SYNERGY DES (Boston Scientific, Marlborough, MA, USA) implantation in patients with MI undergoing percutaneous revascularisation (PCI). METHODS AND RESULTS: We included all consecutive patients with MI undergoing PCI with the SYNERGY DES and newer-generation DES (n-DES group) in Sweden...
May 24, 2018: EuroIntervention
https://www.readbyqxmd.com/read/29792393/outcomes-of-transcatheter-aortic-valve-implantation-compared-with-surgical-aortic-valve-replacement-in-geriatric-patients-with-chronic-kidney-disease
#8
Linda Shavit, Shuli Silberman, Rachel Tauber, Ofer Merin, Daniel Bitran, Daniel Fink
BACKGROUND: Transcatheter aortic valve implantation (TAVI) is a less invasive treatment modality for patients with severe aortic valve stenosis (AS) who are at a higher risk if they have surgery. Preoperative chronic kidney disease (CKD) influences outcomes of cardiac surgery and is associated with a higher mortality and more complicated hospital course. The aims of our study were to evaluate the comparative outcomes of TAVI versus surgical aortic valve replacement (SAVR) in geriatric patients with preoperative CKD...
May 24, 2018: Clinical Nephrology
https://www.readbyqxmd.com/read/29792384/percutaneous-leadless-pacemaker-implantation-in-a-patient-with-bilateral-venous-thoracic-outlet-syndrome
#9
Niek Eg Beurskens, Fleur Vy Tjong, Reinoud E Knops, Ron Jg Peters
No abstract text is available yet for this article.
May 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29792343/plasma-initiated-graft-polymerization-as-an-immobilization-platform-for-metal-free-russian-propolis-ethanol-extracts-designed-specifically-for-biomaterials
#10
Ashwin Ambi, Carolina Vera, Nisharg Parikh, Naidel Perez, Anthony Lopez Rojas, Sanket Kumar, Christopher Stradford, Katherine Borbon, Julia Bryan, Christian Traba
The antibacterial and anti-biofilm activities of propolis have been intensively reported. However, the application of this folk remedy as a means to prevent biomedical implant contamination has yet to be completely evaluated. In response to the significant resistant and infectious attributes of biofilms, biomaterials engineered to possess specific chemical and physical properties were immobilized with metal free Russian propolis ethanol extracts (MFRPEE), a known antibacterial agent. The results obtained from this study begin to examine the application of MFRPEE as a novel alternative method for the prevention of medical and biomedical implant infections...
May 24, 2018: Biofouling
https://www.readbyqxmd.com/read/29792279/can-intraoperative-measurement-of-bone-quality-help-in-decision-making-for-cementless-unicompartmental-knee-arthroplasty
#11
Johannes A Eckert, Sebastian Jaeger, Matthias C Klotz, Martin Schwarze, Rudi G Bitsch
BACKGROUND: In uncemented total hip arthroplasty (THA), low bone mineral density (BMD) is associated with aseptic loosening. BMD is usually assessed via dual-energy X-ray absorptiometry (DXA) or quantitative computed tomography, which takes time and exposes patients to radiation. Due to its low risk profile, intraoperative measurement of the trabecular stability might be a useful alternative to DXA. METHODS: In 24 human femora, BMD was analysed using DXA at the femoral necks and the knees...
May 20, 2018: Knee
https://www.readbyqxmd.com/read/29792070/chondral-delamination-of-fresh-osteochondral-allografts-after-implantation-in-the-knee-a-matched-cohort-analysis
#12
Ryan C Rauck, Dean Wang, Matthew Tao, Riley J Williams
Introduction Delamination of the chondral surface of an osteochondral allograft (OCA) from the underlying cancellous bone has been described as a mode of failure after implantation in the knee. Our hypothesis was that increased storage time of the OCA is associated with increased risk of graft delamination after implantation. Methods Prospective data on 13 patients with evidence of OCA delamination identified on magnetic resonance imaging or during subsequent surgery from 2000 to 2015 were reviewed. A cohort of 33 patients without evidence of graft delamination were then matched to the delamination group based on recipient age, sex, body mass index (BMI), and chondral defect location...
May 1, 2018: Cartilage
https://www.readbyqxmd.com/read/29792034/soft-hydrogel-zwitterionic-coatings-minimize-fibroblast-and-macrophage-adhesion-on-polyimide-substrates
#13
Dusana Trelova, Alice Rita Salgarella, Leonardo Ricotti, Guido Giudetti, Annarita Cutrone, Petra Sramkova, Anna Zahoranova, Dusan Chorvat, Daniel Hasko, Claudio Canale, Silvestro Micera, Juraj Kronek, Arianna Menciassi, Igor Lacik
Minimizing the foreign body reaction to polyimide-based implanted devices has a pivotal role for several biomedical applications. In this work we propose materials exhibiting non-biofouling properties and a Young's modulus reflecting the one of soft human tissues. We describe the synthesis, characterization and in vitro validation of poly(carboxybetaine) hydrogel coatings covalently attached to polyimide substrates via a photolabile 4-azidophenyl group, incorporated in poly(carboxybetaine) chains at two concentrations of 1...
May 24, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29791866/17-%C3%AE-estradiol-exacerbates-methamphetamine-induced-anxiety-like-behavior-in-female-mice
#14
A S Rauhut, M A Curran-Rauhut
The present experiment investigated the effect of 17 β-estradiol (E2 ) on anxiety-like behavior following methamphetamine administration in female, Swiss-Webster mice. Mice underwent bilateral ovariectomy (OVX) followed by a subcutaneous implantation of a Silastic capsule containing either sesame oil (OVX + Oil) or E2 (36 μg/ml; OVX + E2 ). One week later, mice were placed in an open-field chamber for an 8-hour session. During the first 3 hours of the session, mice were permitted to run in the absence of any drug (baseline)...
May 20, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29791768/vaccine-immunotherapy-with-arnax-induces-tumor-specific-memory-t-cells-and-durable-anti-tumor-immunity-in-mouse-models
#15
Yohei Takeda, Sumito Yoshida, Ken Takashima, Noriko Ishii-Mugikura, Hiroaki Shime, Tsukasa Seya, Misako Matsumoto
Immunological checkpoint blockade therapies benefit a limited population of cancer patients. We have previously shown that vaccine immunotherapy with TLR3-adjuvant and tumor antigen overcomes anti-programmed death ligand-1 (PD-L1) resistance in mouse tumor models. In this study, four different OVA-expressing tumor cell lines were implanted into syngeneic mice and subjected to antitumor immunotherapy using ARNAX and whole OVA protein. ARNAX is a Toll-like receptor 3-specific agonist that does not activate the MAVS pathway, and thus does not induce systemic inflammation...
May 23, 2018: Cancer Science
https://www.readbyqxmd.com/read/29791712/surgical-management-after-hysteroscopic-sterilization-minimally-invasive-approach-incorporating-intraoperative-fluoroscopy-for-symptomatic-patients-with-2-essure%C3%A2-devices
#16
E Scott Sills, Natalie S Rickers, Xiang Li
OBJECTIVE: To describe a non-hysterectomy surgical technique for symptomatic patients with >2 Essure® (Bayer Healthcare, Whippany, New Jersey) devices. DESIGN: Patients (n=4) presented with sharp pelvic pain, irregular vaginal bleeding, dyspareunia, weight gain, hair loss, fatigue, and/or diffuse skin rash, all of which were absent before undergoing hysteroscopic sterilization (HS). Hysterosalpingogram obtained before surgical excision of contraceptive tubal implants confirmed more than two Essure® devices in all patients...
June 1, 2018: Surgical Technology International
https://www.readbyqxmd.com/read/29791706/use-of-a-noblestitch%C3%A2-el-device-for-pfo-closure
#17
Emanuela de Cillis, Tommaso Acquaviva, Pasquale D'Alessandro, Alessandro Santo Bortone
Cryptogenic stroke is the final diagnosis in almost 40% of ischemic acute cerebrovascular events. There is currently no definitive clinical evidence that percutaneous closure of patent foramen ovale (PFO) can prevent the recurrence of stroke or transient ischemic attack (TIA). Identification of the causes of neurologic ischemic syndromes is essential for any strategy intended to prevent the catastrophic consequences of cerebral infarction. Since the initial reports of an unexpectedly high prevalence of PFO in younger patients with cryptogenic stroke in 1988, there has been growing interest and experience in diagnosing and treating these patients, both medically and/or with percutaneous closure, in particular for the potential to eliminate paradoxical embolism via PFO, which is a likely mechanism for stroke in these patients...
June 1, 2018: Surgical Technology International
https://www.readbyqxmd.com/read/29791698/stryker-orthopaedic-modeling-and-analytics-soma-a-review
#18
Walter Schmidt, Sally LiArno, Anton Khlopas, Andreas Petersik, Michael A Mont
Due to the differences in bone morphology between demographics such as age, gender, body mass index, and ethnicity, the development of orthopaedic implants requires a large number of anatomical data from various patient populations. In an effort to assess these demographic variations, Stryker Orthopaedic Modeling and Analytics (SOMA) has been developed. SOMA is a suite of tools which utilizes a comprehensive database of computed tomography scans (CT-scans), plus associated three-dimensional (3D) bone models, allowing the user to assess population differences in bone morphology, bone density, and implant fit for the purposes of research and development...
June 1, 2018: Surgical Technology International
https://www.readbyqxmd.com/read/29791693/decoronation-followed-by-dental-implants-placement-fundamentals-applications-and-explanations
#19
Alberto Consolaro, Paulo Domingos Ribeiro Júnior, Maurício A Cardoso, Dario A Oliveira Miranda, Monica Salfatis
Dental arches areas with teeth presenting dentoalveolar ankylosis and replacement root resorption can be considered as presenting normal bone, in full physiological remodeling process; and osseointegrated implants can be successfully placed. Bone remodeling will promote osseointegration, regardless of presenting ankylosis and/or replacement root resorption. After 1 to 10 years, all dental tissues will have been replaced by bone. The site, angulation and ideal positioning in the space to place the implant should be dictated exclusively by the clinical convenience, associated with previous planning...
January 2018: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/29791692/prosthetic-orthodontic-and-implant-supported-rehabilitation-of-five-maxillary-anterior-teeth-with-alveolar-bone-loss
#20
Odilon Guariza-Filho, Cristiano Miranda de Araujo, Angela Graciela Deliga Schroder, Orlando Motohiro Tanaka, Ricardo Kern, Antonio Carlos Ruellas
INTRODUCTION: Treatment of maxillofacial injuries is complex and requires the establishment of a comprehensive and accurate diagnosis and correct treatment planning. OBJECTIVE: The objective of this case report was to describe the re-treatment of a 27-year-old woman who was involved in a severe car accident that resulted in the loss of five anterior teeth and alveolar bone, and whose previous orthodontic and surgical treatments had been unsuccessful. CASE REPORT: In this case, the space for the missing mandibular molar was reopened to allow for rehabilitation...
January 2018: Dental Press Journal of Orthodontics
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