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https://www.readbyqxmd.com/read/29332104/assessment-of-the-fit-of-removable-partial-denture-fabricated-by-computer-aided-designing-computer-aided-manufacturing-technology
#1
Khalid A O Arafa
To assess the level of evidence that supports the quality of fit for removable partial denture (RPD) fabricated by computer-aided designing/computer aided manufacturing (CAD/CAM) and rapid prototyping (RP) technology. Methods: An electronic search was performed in Google Scholar, PubMed, and Cochrane library search engines, using Boolean operators. All articles published in English and published in the period from 1950 until April 2017 were eligible to be included in this review. The total number of articles contained the search terms in any part of the article (including titles, abstracts, or article texts) were screened, which resulted in 214 articles...
January 2018: Saudi Medical Journal
https://www.readbyqxmd.com/read/29331906/strontium-hydroxyapatite-scaffolds-engineered-with-stem-cells-aid-osteointegration-and-osteogenesis-in-osteoporotic-sheep-model
#2
Sunitha Chandran, Sachin J Shenoy, Suresh Babu S, Renjith P Nair, Varma H K, Annie John
Osteoporotic fracture healing is an orthopaedic challenge due to excessive bone resorption and impaired osteogenesis. Majority of current treatment strategies focus on regulating bone resorption and the potential application of Mesenchymal Stem Cells (MSCs) in promoting osteogenesis has not been explored much. Furthermore, the present study has put forth a novel approach, wherein the synergistic action of Strontium (Sr) and MSCs in a single implant may facilitate osteoporotic bone healing. Strontium Hydroxyapatite (SrHA) synthesized by wet precipitation was fabricated into tissue engineered Strontium incorporated Hydroxyapatite (cSrHA) using sheep adipose tissue derived MSCs (ADMSCs)...
December 28, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29331807/clay-nanoparticles-for-regenerative-medicine-and-biomaterial-design-a-review-of-clay-bioactivity
#3
REVIEW
Mohamed Mousa, Nicholas D Evans, Richard O C Oreffo, Jonathan I Dawson
Clay nanoparticles, composites and hydrogels are emerging as a new class of biomaterial with exciting potential for tissue engineering and regenerative medicine applications. Clay particles have been extensively explored in polymeric nanocomposites for self-assembly and enhanced mechanical properties as well as for their potential as drug delivery modifiers. In recent years, a cluster of studies have explored cellular interactions with clay nanoparticles alone or in combination with polymeric matrices. These pioneering studies have suggested new and unforeseen utility for certain clays as bioactive additives able to enhance cellular functions including adhesion, proliferation and differentiation, most notably for osteogenesis...
January 3, 2018: Biomaterials
https://www.readbyqxmd.com/read/29331090/enhanced-chondrogenesis-of-mesenchymal-stem-cells-over-silk-fibroin-chitosan-chondroitin-sulfate-three-dimensional-scaffold-in-dynamic-culture-condition
#4
Parinita Agrawal, Krishna Pramanik, Varshini Vishwanath, Amit Biswas, Akalabya Bissoyi, Pradeep Kumar Patra
Chondroitin sulfate (Ch) is one of the main structural components of cartilage tissue, therefore, its presence in tissue engineered scaffold is expected to enhance cartilage regeneration. Previously, silk fibroin/chitosan (SF/CS) blend was proven to be a potential biomaterial for tissue development. In this study, the effect of Ch on physicochemical and biological properties of SF/CS blend was investigated and scaffolds with 0.8 wt% Ch was found to be favorable. The scaffolds possess pore size of 37-212 µm, contact angle 46...
January 13, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29330730/scaffold-free-tissue-engineering-for-injured-joint-surface-restoration
#5
REVIEW
Kazunori Shimomura, Wataru Ando, Hiromichi Fujie, David A Hart, Hideki Yoshikawa, Norimasa Nakamura
Articular cartilage does not heal spontaneously due to its limited healing capacity, and thus effective treatments for cartilage injuries has remained challenging. Since the first report by Brittberg et al. in 1994, autologous chondrocyte implantation (ACI) has been introduced into the clinic. Recently, as an alternative for chondrocyte-based therapy, mesenchymal stem cell (MSC)-based therapy has received considerable research attention because of the relative ease in handling for tissue harvest, and subsequent cell expansion and differentiation...
January 5, 2018: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/29330711/boosting-tendon-repair-interplay-of-cells-growth-factors-and-scaffold-free-and-gel-based-carriers
#6
REVIEW
Zexing Yan, Heyong Yin, Michael Nerlich, Christian G Pfeifer, Denitsa Docheva
BACKGROUND: Tendons are dense connective tissues and critical components for the integrity and function of the musculoskeletal system. Tendons connect bone to muscle and transmit forces on which locomotion entirely depends. Due to trauma, overuse and age-related degeneration, many people suffer from acute or chronic tendon injuries. Owing to their hypovascularity and hypocellularity, tendinopathies remain a substantial challenge for both clinicians and researchers. Surgical treatment includes suture or transplantation of autograft, allograft or xenograft, and these serve as the most common technique for rescuing tendon injuries...
January 5, 2018: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/29330459/a-novel-ultra-stable-monomeric-green-fluorescent-protein-for-direct-volumetric-imaging-of-whole-organs-using-clarity
#7
Daniel J Scott, Natalie J Gunn, Kelvin J Yong, Verena C Wimmer, Nicholas A Veldhuis, Leesa M Challis, Mouna Haidar, Steven Petrou, Ross A D Bathgate, Michael D W Griffin
Recent advances in thick tissue clearing are enabling high resolution, volumetric fluorescence imaging of complex cellular networks. Fluorescent proteins (FPs) such as GFP, however, can be inactivated by the denaturing chemicals used to remove lipids in some tissue clearing methods. Here, we solved the crystal structure of a recently engineered ultra-stable GFP (usGFP) and propose that the two stabilising mutations, Q69L and N164Y, act to improve hydrophobic packing in the core of the protein and facilitate hydrogen bonding networks at the surface, respectively...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330205/clinical-utility-of-a-stat3-regulated-microrna-200-family-signature-with-prognostic-potential-in-early-gastric-cancer
#8
Liang Yu, Di Wu, Hugh Gao, Jesse Balic, Anna Tsykin, Tae-Su Han, You Dong Liu, Catherine Lydia Kennedy, Ji-Kun Li, Jie-Qi Mao, Patrick Tan, Masanobu Oshima, Gregory J Goodall, Brendan J Jenkins
PURPOSE: The majority of gastric cancer (GC) patients are diagnosed with late stage disease, for which distinct molecular subtypes have been identified that are potentially amenable to targeted therapies. However, there exists no molecular classification system with prognostic power for early stage GC (EGC) because the molecular events promoting GC initiation remain ill-defined. EXPERIMENTAL DESIGN: miRNA microarrays were performed on gastric tissue from the gp130F/F preclinical EGC mouse model, prior to tumor initiation...
January 12, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29329231/development-of-a-cytocompatible-scaffold-from-pig-immature-testicular-tissue-allowing-human-sertoli-cell-attachment-proliferation-and-functionality
#9
Maxime Vermeulen, Federico Del Vento, Francesca de Michele, Jonathan Poels, Christine Wyns
Cryopreservation of immature testicular tissue before chemo/radiotherapy is the only option to preserve fertility of cancer-affected prepubertal boys. To avoid reintroduction of malignant cells, development of a transplantable scaffold by decellularization of pig immature testicular tissue (ITT) able to support decontaminated testicular cells could be an option for fertility restoration in these patients. We, therefore, compared decellularization protocols to produce a cytocompatible scaffold. Fragments of ITT from 15 piglets were decellularized using three protocols: sodium dodecyl sulfate (SDS)-Triton (ST), Triton-SDS-Triton (TST) and trypsin 0...
January 12, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29329076/attachment-of-nanoparticulate-drug-release-systems-on-poly-%C3%AE%C2%B5-caprolactone-nanofibers-via-a-graftpolymer-as-interlayer
#10
Dominik de Cassan, Steffen Sydow, Nadeschda Schmidt, Peter Behrens, Yvonne Roger, Andrea Hoffmann, Anna Lena Hoheisel, Birgit Glasmacher, Robert Hänsch, Henning Menzel
Electrospun poly(ε-caprolactone) (PCL) fiber mats are modified using a chitosan grafted with PCL (CS-g-PCL), to improve the biological performance and to enable further modifications. The graft copolymer is immobilized by the crystallization of the PCL grafts on the PCL fiber surface as binding mechanism. In this way, the surface of the fibers is covered with chitosan bearing cationic amino groups, which allow adsorption of oppositely charged nanoparticulate drug-delivery systems. The modification of the fiber mats and the attachment of the drug delivery systems are easy and scalable dip processes...
December 29, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29329074/goat-tendon-collagen-human-fibrin-hydrogel-for-comprehensive-parametric-evaluation-of-huvec-microtissue-based-angiogenesis
#11
Rajan Narayan, Tarun Agarwal, Debasish Mishra, Tapas Kumar Maiti, Sujata Mohanty
The cell and extracellular matrix (ECM) interactions play a very important role during angiogenesis. Remodeling of the extracellular matrix along with pro-angiogenic/anti-angiogenic factors, and matrix-degrading proteases, accounts for endothelial cell growth, migration, and tube formation. However, for studying angiogenesis, only limited and expensive biomaterials are available. Despite being biocompatible, inexpensive, and easy availability; the potential of goat tendon collagen (GTC) has never been explored for vascular tissue engineering applications...
January 2, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29327758/a-computational-analysis-of-pro-angiogenic-therapies-for-peripheral-artery-disease
#12
Lindsay E Clegg, Feilim Mac Gabhann
Inducing therapeutic angiogenesis to effectively form hierarchical, non-leaky networks of perfused vessels in tissue engineering applications and ischemic disease remains an unmet challenge, despite extensive research and multiple clinical trials. Here, we use a previously-developed, multi-scale, computational systems pharmacology model of human peripheral artery disease to screen a diverse array of promising pro-angiogenic strategies, including gene therapy, biomaterials, and antibodies. Our previously-validated model explicitly accounts for VEGF immobilization, Neuropilin-1 binding, and weak activation of VEGF receptor 2 (VEGFR2) by the "VEGFxxxb" isoforms...
January 12, 2018: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/29327690/laser-direct-writing-by-two-photon-polymerization-of-3d-honeycomb-like-structures-for-bone-regeneration
#13
Irina Alexandra Paun, Roxana Cristina Popescu, Cosmin Catalin Mustaciosu, Marian Zamfirescu, Bogdan Stefanita Calin, Mona Mihailescu, Maria Dinescu, Andrei Popescu, Diana Georgiana Chioibasu, Mihai Sopronyi, Catalin Luculescu
A major limitation of existing 3D implantable structures for bone tissue engineering is that most of the cells rapidly attach on the outer edges of the structure, restricting the cells penetration into the inner parts and causing the formation of a necrotic core. Furthermore, these structures generally possess a random spatial arrangement and do not preserve the isotropy on the whole volume. Here, we report on the fabrication and testing of an innovative 3D hierarchical, honeycomb-like structure (HS), with reproducible and isotropic arhitecture, that allows "in volume" migration of osteoblasts...
January 12, 2018: Biofabrication
https://www.readbyqxmd.com/read/29327677/autologous-smooth-muscle-progenitor-cells-enhance-regeneration-of-tissue-engineered-bladder
#14
Liuhua Zhou, Jiadong Xia, Pengji Wang, Ruipeng Jia, Jun Hua Zheng, Xudong Yao, Yun Chen, Yutian Dai, Bin Yang
Tissue engineering techniques provide a great potential to de novo construct a histological bladder. Smooth muscle regeneration is extremely important for the functional recovery of engineered neo-bladder. However, many challenges remain for the use of bladder smooth muscle cells (SMCs) as the cell sources. Recent evidences showed that smooth muscle progenitor cells (SPCs) in the peripheral blood have the capacity of differentiating into SMCs, while their use for bladder regeneration hasn't yet been reported...
January 12, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29327674/insoluble-microenvironment-facilitating-the-generation-and-maintenance-of-pluripotency
#15
Xiaofang Chen, Jiaqi Li, Yan Huang, Peng Liu, Yubo Fan
Induced pluripotent stem cells (iPSCs) hold enormous potential as a tool to generate cells for tissue engineering and regenerative medicine. Since the initial report of iPSCs in 2006, many different methods have been developed in order to enhance the safety and efficiency of this technology. Recent studies indicate that the extracellular signals can promote the production of iPSCs, and even replace the Yamanaka factors. Noticeably, abundant evidences suggest that the insoluble microenvironment, including the culture substrate and neighboring cells, directly regulates the expression of core pluripotency genes and the epigenetic modification of the chromatins, hence impact the reprogramming dynamics...
January 12, 2018: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/29327671/tissue-engineered-heart-valves-a-call-for-mechanistic-studies
#16
Kevin Blum, Joseph Drews, Christopher K Breuer
Heart valve disease carries a substantial risk of morbidity and mortality. Outcomes are significantly improved by valve replacement, but currently-available mechanical and biological replacement valves are associated with complications of their own. Mechanical valves have a high rate of thromboembolism and require lifelong anticoagulation. Biological prosthetic valves have a much shorter lifespan, and are prone to tearing and degradation. Both types of valves lack the capacity for growth, making them particularly problematic in pediatric patients...
January 12, 2018: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/29327564/neo-pulmonary-valve-fabrication-using-tissue-engineered-pericardium-a-new-surgical-technique
#17
Jaroslav Benedik, Sharaf-Eldin Shehada, Fanar Mourad, Yacine Elhmidi, Juri Lubarski, Konstantinos Tsagakis, Heinz Jakob
No abstract text is available yet for this article.
January 9, 2018: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/29327490/fetal-subcutaneous-cells-have-potential-for-autologous-tissue-engineering
#18
Åsa Ekblad, Magnus Westgren, Magdalena Fossum, Cecilia Götherström
BACKGROUND: Major congenital malformations affect up to 3% of newborns. Infants with prenatally diagnosed soft tissue defects should benefit from having autologous tissue readily available for surgical implantation in the perinatal period. In this study, we investigate fetal subcutaneous cells (fSC) as cellular source for tissue engineering. METHODS: Fetal subcutaneous biopsies were collected from elective terminations at gestational week 20-21. Cells were isolated, expanded and characterized in vitro...
January 11, 2018: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29327431/enhanced-bone-regeneration-and-visual-monitoring-via-super-paramagnetic-iron-oxide-nanoparticle-scaffold-in-rats
#19
Shuying Hu, Yi Zhou, Yantao Zhao, Yang Xu, Feimin Zhang, Ning Gu, Junqing Ma, Mark A Reynolds, Yang Xia, Hockin H K Xu
A main challenge for use of scaffolds in bone engineering involves non-invasive monitoring in vivo and enhanced bone regeneration. The tissue-repair effect of super-paramagnetic iron oxide nanoparticles (SPIONs) was demonstrated previously by our group. However, testing in vivo is needed to confirm in vitro results. Here, SPIONs loaded gelatin sponge (GS) was used as a scaffold (SPIONs-GS) and implanted in the incisor sockets of Sprague-Dawley rats. Incisor sockets filled with nothing and filled with GS served as controls...
January 12, 2018: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29327428/an-endochondral-ossification-approach-to-early-stage-bone-repair-use-of-tissue-engineered-hypertrophic-cartilage-constructs-as-primordial-templates-for-weight-bearing-bone-repair
#20
Amos Matsiko, Emmet M Thompson, Cai Lloyd-Griffith, Gráinne M Cunniffe, Tatiana Vinardell, John P Gleeson, Daniel J Kelly, Fergal J O'Brien
Mimicking endochondral ossification to engineer constructs offers a novel solution to overcoming the problems associated with poor vascularisation in bone repair. This can be achieved by harnessing the angiogenic potency of hypertrophic cartilage. In this study, we demonstrate that tissue-engineered hypertrophically-primed cartilage constructs can be developed from collagen-based scaffolds cultured with mesenchymal stem cells. These constructs were subsequently implanted into femoral defects in rats. It was evident that the constructs could support enhanced early-stage healing at 4 weeks of these weight-bearing femoral bone defects compared to untreated defects...
January 11, 2018: Journal of Tissue Engineering and Regenerative Medicine
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