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Biologic mesh

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https://www.readbyqxmd.com/read/29784804/structure-of-xyloglucan-xylosyltransferase-1-reveals-simple-steric-rules-that-define-biological-patterns-of-xyloglucan-polymers
#1
Alan T Culbertson, Jacqueline J Ehrlich, Jun-Yong Choe, Richard B Honzatko, Olga A Zabotina
The plant cell wall is primarily a polysaccharide mesh of the most abundant biopolymers on earth. Although one of the richest sources of biorenewable materials, the biosynthesis of the plant polysaccharides is poorly understood. Structures of many essential plant glycosyltransferases are unknown and suitable substrates are often unavailable for in vitro analysis. The dearth of such information impedes the development of plants better suited for industrial applications. Presented here are structures of Arabidopsis xyloglucan xylosyltransferase 1 (XXT1) without ligands and in complexes with UDP and cellohexaose...
May 21, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29781765/individualized-titanium-mesh-combined-with-platelet-rich-fibrin-and-deproteinized-bovine-bone-a-new-approach-for-challenging-augmentation
#2
Jonas Lorenz, Sarah Al-Maawi, Robert Sader, Shahram Ghanaati
Autologous bone transfer is regarded as the gold standard for ridge augmentation before dental implantation, especially in severe bony defects caused by tumor resection or atrophy. In addition to the advantages of autologous bone, transplantation has several disadvantages, such as secondary operation, increased morbidity and pain. The present study reports, for the first time, a combination of a xenogeneic bone substitute (BO) with platelet-rich fibrin (PRF), which is a fully autologous blood concentrate derived from the patient's own peripheral blood by centrifugation...
May 21, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29776138/discretization-dependent-model-for-weakly-connected-excitable-media
#3
Pedro André Arroyo, Sergio Alonso, Rodrigo Weber Dos Santos
Pattern formation has been widely observed in extended chemical and biological processes. Although the biochemical systems are highly heterogeneous, homogenized continuum approaches formed by partial differential equations have been employed frequently. Such approaches are usually justified by the difference of scales between the heterogeneities and the characteristic spatial size of the patterns. Under different conditions, for example, under weak coupling, discrete models are more adequate. However, discrete models may be less manageable, for instance, in terms of numerical implementation and mesh generation, than the associated continuum models...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29766347/towards-alternative-approaches-for-coupling-of-a-soft-robotic-sleeve-to-the-heart
#4
Markus A Horvath, Claudia E Varela, Eimear B Dolan, William Whyte, David S Monahan, Christopher J Payne, Isaac A Wamala, Nikolay V Vasilyev, Frank A Pigula, David J Mooney, Conor J Walsh, Garry P Duffy, Ellen T Roche
Efficient coupling of soft robotic cardiac assist devices to the external surface of the heart is crucial to augment cardiac function and represents a hurdle to translation of this technology. In this work, we compare various fixation strategies for local and global coupling of a direct cardiac compression sleeve to the heart. For basal fixation, we find that a sutured Velcro band adheres the strongest to the epicardium. Next, we demonstrate that a mesh-based sleeve coupled to the myocardium improves function in an acute porcine heart failure model...
May 15, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29763916/perineal-wound-closure-using-biological-mesh-following-extralevator-abdominoperineal-excision
#5
Naseer Baloch, Per J Nilsson, Caroline Nordenvall, Mirna Abraham-Nordling
AIMS: This study aimed to describe the short-term perineal healing rates in patients with perineal reconstruction using a biological mesh following extralevator abdominoperineal excision (elAPE). METHODS: In a retrospective, descriptive single-centre cohort study, 88 consecutive patients treated with elAPE and perineal closure using a biological mesh between January 2011 and December 2015 were reviewed. All available data from electronic hospital records was collected...
May 15, 2018: Digestive Surgery
https://www.readbyqxmd.com/read/29760723/applications-of-mesenchymal-stem-cells-in-sinus-lift-augmentation-as-a-dental-implant-technology
#6
REVIEW
Feridoun Parnia, Javad Yazdani, Solmaz Maleki Dizaj
The potential application of stem cell biology in human dentistry is a new and emerging field of research. The objective of the current review was to study the efficiency of mesenchymal stem cells (MSCs) in sinus lift augmentation (SLA). A literature review was performed in PubMed Central using MeSH keywords such as sinus lift, MSCs, dental implants, and augmentation. The searches involved full-text papers written in English, published in the past 10 years (2007-2017). The review included in vitro and in vivo studies on the use of MSCs in SLA...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29755623/main-considerations-of-cardiogenic-shock-and-its-predictors-systematic-review
#7
REVIEW
Maria Christiane Valeria Braga Braile-Sternieri, Eliana Migliorini Mustafa, Victor Rodrigues Ribeiro Ferreira, Sofia Braile Sabino, Giovanni Braile Sternieri, Lucia Angelica Buffulin de Faria, Bethina Canaroli Sbardellini, Cibele Olegario Vianna Queiroz, Domingo Marcolino Braile, Idiberto Jose Zotarelli Filho
The mortality rate of post-infarction cardiogenic shock (CS) was 80.0-90.0%. Recent studies show a significant reduction of hospital mortality to approximately 50.0%. CS is defined as systemic tissue hypoperfusion resulting from systolic and/or diastolic heart dysfunction, the main cause of which is acute myocardial infarction (AMI). The main predictors are biological markers such as troponin, CKMB and lactate. A systematic literature review and meta-analysis is performed in order to present and correlate the main literary findings on CS and its evolution with possible changes in biomarkers such as troponin, lactate and CKMB...
April 2018: Cardiology Research
https://www.readbyqxmd.com/read/29754616/updates-in-mesh-and-biomaterials
#8
REVIEW
Brent D Matthews, Lauren Paton
Prior publications of the Surgical Clinics of North America have highlighted the technical challenges of abdominal wall reconstruction. This article provides an update on synthetic, biologic, and biosynthetic mesh research since the 2013 Surgical Clinics of North America hernia publication and highlights the future of mesh research. This update features research that has been conducted since the prior publication to guide surgeons to choose the best and most appropriate mesh for their patients.
June 2018: Surgical Clinics of North America
https://www.readbyqxmd.com/read/29753964/a-web-based-system-for-neural-network-based-classification-in-temporomandibular-joint-osteoarthritis
#9
Priscille de Dumast, Clément Mirabel, Lucia Cevidanes, Antonio Ruellas, Marilia Yatabe, Marcos Ioshida, Nina Tubau Ribera, Loic Michoud, Liliane Gomes, Chao Huang, Hongtu Zhu, Luciana Muniz, Brandon Shoukri, Beatriz Paniagua, Martin Styner, Steve Pieper, Francois Budin, Jean-Baptiste Vimort, Laura Pascal, Juan Carlos Prieto
OBJECTIVE: The purpose of this study is to describe the methodological innovations of a web-based system for storage, integration and computation of biomedical data, using a training imaging dataset to remotely compute a deep neural network classifier of temporomandibular joint osteoarthritis (TMJOA). METHODS: This study imaging dataset consisted of three-dimensional (3D) surface meshes of mandibular condyles constructed from cone beam computed tomography (CBCT) scans...
May 1, 2018: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/29752845/perineal-closure-following-extralevator-abdominoperineal-excision-for-cancer-of-the-rectum
#10
Jenifer Barrie, Adam Haque, David Andrew Evans
AIM: Extralevator abdominoperineal resection (ELAP) may be complicated by perineal wound healing problems and herniation. We report a consecutive series of 38 such patients with selective use of a fasciocutaneous V-Y buttock advancement flap (BAF). METHOD: Data were collected on a series of patients undergoing ELAP for rectal malignancy between August 2011 and July 2017. Demographics, management and outcomes were recorded prospectively. Perineal wound problems were considered 'major' if they required packing, otherwise being classed as 'minor'...
May 12, 2018: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
https://www.readbyqxmd.com/read/29751529/the-use-and-safety-of-tnf-inhibitors-during-pregnancy-in-women-with-psoriasis-a-review
#11
REVIEW
Cæcilie Bachdal Johansen, Espen Jimenez-Solem, Ann Haerskjold, Freja Lærke Sand, Simon Francis Thomsen
Psoriasis is a chronic immune-mediated inflammatory disease affecting women of childbearing potential. Biologic agents, notably Tumor Necrosis Factor inhibitors (TNFi), are the only current non-contraindicated systemic treatment option during pregnancy. TNFi comprised of complete immunoglobulin G (IgG) antibodies antibodies (adalimumab, golimumab, and infliximab) actively cross the placenta from the second trimester and are detectable in the child up to one year postpartum. Data on safety of TNFi are conflicting; however a trend towards drug-specific harm has been reported, with increased risk of congenital malformations and preterm birth...
May 3, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29744434/-in-situ-assembly-of-fibrinogen-hyaluronic-acid-hydrogel-via-knob-hole-interaction-for-3d-cellular-engineering
#12
Shengjie Huang, Chunfen Wang, Jingwei Xu, Lie Ma, Changyou Gao
Hyaluronic acid (HA)-based hydrogels have applied widely for biomedical applications due to its biocompatibility and biodegradability. However, the use of initiators or crosslinkers during the hydrogel formation may cause cytotoxicity and thereby impair the biocompatibility. Inspired by the crosslinking mechanism of fibrin gel, a novel HA-based hydrogel was developed via the in situ supramolecular assembly based on knob-hole interactions between fibrinogen and knob-grafted HA (knob-g-HA) in this study. The knob-grafted HA was synthesized by coupling knob peptides (GPRPAAC, a mimic peptide of fibrin knob A) to HA via Michael addition...
December 2017: Bioactive Materials
https://www.readbyqxmd.com/read/29744089/use-of-a-biological-mesh-for-the-treatment-of-perineal-fistula-following-radical-colorectal-resection
#13
Marinos C Makris, Michael Kornaropoulos, Apostolos Krikelis, Demetrios Moris, Diamantis I Tsilimigras, Elia Modestou, Artemis Liapi, Vasileios Karatzias, Christos Damaskos, Andreas Zevlas
Patients with postradiation therapy for malignancies and/or extensive colorectal surgery are prone to the development of enteroperineal fistulas. Application of biological meshes may prove beneficial in treating complicated enteroperineal fistulas as they provide a stable ground for closing pelvic defects even in contaminated fields.
May 2018: Clinical Case Reports
https://www.readbyqxmd.com/read/29736666/laparoscopic-hiatal-hernia-repair-with-falciform-ligament-buttress
#14
Robert A Grossman, Fred J Brody, Clint S Schoolfield, Ben Biteman, Steve Zeddun
BACKGROUND: Using synthetic mesh to buttress the crural repair during laparoscopic hiatal hernia repair may be associated with dysphagia and esophageal erosions, while a biologic mesh is expensive and does not decrease long-term recurrence rates. This study documents outcomes of laparoscopic paraesophageal hernia repairs using the falciform ligament to reinforce the crural repair. METHODS: This is a prospective study of laparoscopic paraesophageal hernia repairs with a falciform ligament buttress...
May 7, 2018: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/29732505/prophylactic-mesh-reinforcement-of-stomas-a-cost-effectiveness-meta-analysis-of-randomised-controlled-trials
#15
J M Findlay, C P J Wood, C Cunningham
BACKGROUND: Previous meta-analyses of randomised controlled trials (RCTs) have suggested a reduction in parastomal hernias (PSH) with prophylactic mesh. However, concerns persist regarding variably supportive evidence and cost. We performed an updated systematic review and meta-analysis to inform a novel cost-effectiveness analysis. METHODS: The PubMed, EMBASE and Cochrane Centre Register of Controlled Trials databases were searched (February 2018). We included RCTs assessing mesh reinforcement during stoma formation...
May 7, 2018: Techniques in Coloproctology
https://www.readbyqxmd.com/read/29720018/microwave-assisted-synthesis-and-evaluation-of-type-1-collagen-apatite-composites-for-dental-tissue-regeneration
#16
Kanwal Ilyas, Saba W Qureshi, Sadia Afzal, Roquyya Gul, Muhammad Yar, Muhammad Kaleem, Abdul S Khan
The aim was to develop an economical and biocompatible collagen-based bioactive composite for tooth regeneration. Acid-soluble collagen was extracted and purified from fish scales. The design was innovated to molecularly tailor the surface charge sites of the nano-apatite providing chemical bonds with the collagen matrix via microwave irradiation technique. The obtained collagen was identified by sodium dodecyl sulfate polyacrylamide gel electrophoresis analysis. The composites were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis/differential scanning calorimetry, and scanning electron microscopy...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29717564/commentary-on-short-and-long-term-clinical-and-patient-reported-outcomes-following-laparoscopic-ventral-mesh-rectopexy-using-biological-mesh-for-pelvic-organ-prolapse-a-prospective-cohort-study-of-224-consecutive-patients
#17
Martijn Pieter Gosselink
No abstract text is available yet for this article.
May 2018: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
https://www.readbyqxmd.com/read/29697627/comparative-effectiveness-of-retromuscular-and-intraperitoneal-repair-what-is-the-value-of-posterior-sheath-reconstruction
#18
Martin J Carney, Charles A Messa, Jason M Weissler, Sameer Shakir, Ari M Wes, Fabiola A Enriquez, Jesse Y Hsu, J Scott Roth, Stephen J Kovach, John P Fischer
BACKGROUND: The authors hypothesize that posterior sheath reconstruction to achieve retromuscular mesh placement provides outcomes comparable to traditional retromuscular mesh placement and superior to intraperitoneal repair. METHODS: Patients were divided into three groups: (1) retromuscular mesh placement with repaired posterior sheath defects, (2) retromuscular repair with an intact posterior sheath, and (3) intraperitoneal repair. Primary outcomes included recurrence, surgical-site occurrences, and cost...
May 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29691825/the-use-of-electrospinning-technique-on-osteochondral-tissue-engineering
#19
Marta R Casanova, Rui L Reis, Albino Martins, Nuno M Neves
Electrospinning, an electrostatic fiber fabrication technique, has attracted significant interest in recent years due to its versatility and ability to produce highly tunable nanofibrous meshes. These nanofibrous meshes have been investigated as promising tissue engineering scaffolds since they mimic the scale and morphology of the native extracellular matrix. The sub-micron diameter of fibers produced by this process presents various advantages like the high surface area to volume ratio, tunable porosity, and the ability to manipulate the nanofiber composition in order to get desired properties and functionality...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29689444/changes-in-the-physical-properties-of-the-dynamic-layer-and-its-correlation-with-permeate-quality-in-a-self-forming-dynamic-membrane-bioreactor
#20
Dao Guan, Ji Dai, Yoshimasa Watanabe, Guanghao Chen
The self-forming dynamic membrane bioreactor (SFDMBR) is a biological wastewater treatment technology based on the conventional membrane bioreactor (MBR) with membrane material modification to a large pore size (30-100 μm). This modification requires a dynamic layer formed by activated sludge to provide effective filtration function for high-quality permeate production. The properties of the dynamic layer are therefore important for permeate quality in SFDMBRs. The interaction between the structure of the dynamic layer and the performance of SFDMBRs is little known but understandably complex...
April 18, 2018: Water Research
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