Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 15 of 15 for “"ePTFE"”.
-
Hyaluronic acid enhancement of expanded polytetrafluoroethylene for small diameter vascular grafts
… (Dacron) and expanded polytetrafluoroethylene (ePTFE) are the most commonly used small diameter synthetic vascular graft materials, there are significant limitations that make these materials unfavorable for use in the low blood flow conditions of the small diameter arteries. Specifically, …
-
Healing Following Periodontal Reconstructive Surgery : Surgical Implantation of a Collagen Matrix or Demineralized Freeze-dried Bone Allograft
… by an expanded polytetrafluoroethylene (ePTFE) membrane with or without DFDBA was evaluated in 20 intrabony defects. Ten intrabony defects, one in each of 10 patients, were treated with reconstructive surgery including the ePTFE membrane with DFDBA. Another 10 defects, one in each of 10 …
-
Development of an In-Vitro Tissue Engineered Blood Vessel Mimic Using Human Large Vessel Cell Sources
… endothelial cells (EC) sodded on an ePTFE scaffold. To create a more physiologically accurate model, a dual layer of large vessel endothelial and smooth muscle cells (SMC) on an ePTFE tube is investigated throughout this thesis. Human umbilical vein endothelial cells (HUVEC) and human …
-
Hemocompatibility of polymeric materials for blood-contacting applications
… of expanded polytetrafluoroethylene (ePTFE), linear low-density polyethylene (LLDPE) and polyethylene terephthalate (PET); 3 potential materials for blood-contacting applications. The surface morphology was characterized using scanning electron microscopy (SEM), and surface wettability …
-
Die Osseointegration von Implantaten in Extraktionsalveolen in Abhängigkeit von der Wundversorgung
… versorgt: 1. Kontrolle ohne Abdeckung, 2. ePTFE Membran, 3. AlloDerm (Hauttransplantat), 4. Kombination aus ePTFE und AlloDerm. Die Affen wurden nach verschiedenen zeitlichen Abständen 2 Wochen, 1 Monat, 3 Monate und 6 Monate geopfert. Parameter wie Implantat-Knochen-Kontakt im neu …
-
Isolating and optimising transmural endothelialization as an independent mode of spontaneous vascular graft healing
… at 2, 4, and 6 weeks (n=6/time-point) (ePTFE;ID1.7mm;IND15-25µm). High-porosity polyurethane (internal diameter 1.7mm- 150mm pore size) grafts were interposed between ePTFE grafts for 2, 4, 6, and 8 weeks (n=6/time point). Grafts were looped to increase their length and were implanted …
-
Tissue Engineering a Blood Vessel Mimic While Monitoring Contamination Through Sterility Assurance Testing
… on using an expanded polytetrafluoroethylene (ePTFE) scaffold in conjunction with human endothelial cells to replicate the innermost intimal layer of a blood vessel. Human umbilical vein endothelial cells (HUVECs) were pressure sodded onto ePTFE scaffolds through cell sodding techniques in an …
-
Characterization and Implementation of a Decellularized Porcine Vessel as a Biologic Scaffold for a Blood Vessel Mimic
… model uses expanded poly(terafluorethylene) [ePTFE] or poly(lactic-go-glycolide) [PLGA] as the choice material for the scaffold. EPTFE has several advantages as it is a widely recognized biomaterial. However, ePTFE is very expensive and lacks native mechanical properties. PLGA is another …
-
Stabilised decellularised vascular grafts in an ovine carotid model
… standard 6mm expanded polytetrafluoroethylene (ePTFE) on the contralateral side of each animal as control. In-situ patency was determined by ultrasound and angiography at two months, following which the grafts were explanted for macro- and microscopic analysis. Results: In-vitro evaluation: …
-
Ultrasonography Evaluation of Patency of Implanted Infra-Renal Vascular Grafts in the Rat Model.
… 18mm length) expanded polytetrafluoroethylene (ePTFE) grafts, while 12 rats received a long (1.8mm ID, 100mm length) looped ePTFE conduit with a sealed mid-graft (10mm length) section. Ultrasonography was conducted on days 1, 3, 7 and weeks 4, 8 and 12 post operatively. Grafts were explanted if …
-
Progress in synthetic materials for abdominal wall repair
… between an anti-adhesive barrier layer of ePTFE and small pore polypropylene causes an extremely intense inflammatory reaction and fibrosis formation leading to shrinkage, inadequate mesh overlap and clinical recurrences. In conclusion, new materials with a reliable intrinsic mesh memory …
-
Use Of synthetic solid scaffolds to mechanically support a chondrocyte-seeded peptide hydrogel for articular cartilage repair
… (PGA:TMC) or expanded polytetrafluoroethylene (ePTFE), loaded with a chondrocyte-seeded self-assembling peptide hydrogel, [KLDL]₃. We hypothesized that these composite scaffolds would benefit from the mechanical protection of the solid scaffolds as well as the pro-chondrogenic and proliferative …
-
Stimulating angiogenesis into biomaterials through the delivery of growth factors
… autologous vein or synthetic materials such as ePTFE. Long term patency of small diameter vascular grafts used for infra-inguinal reconstructions, however, is below 50 % 5 years after implantation. Therefore, novel vascular graft concepts and materials are needed. The concept of transmural in …
-
Electrospun Tissue Engineered Vascular Grafts
ePTFE and Dacron vascular grafts are successful in large diameter applications but provide poor outcomes in small diameter (<6 mm) applications. Occlusion, poor cell ingrowth and a mismatch of compliance compared to the native vessel, cause failure to the current synthetic grafts. Spontaneous …
-
Electrospun Tissue Engineered Vascular Grafts
ePTFE and Dacron vascular grafts are successful in large diameter applications but provide poor outcomes in small diameter (<6 mm) applications. Occlusion, poor cell ingrowth and a mismatch of compliance compared to the native vessel, cause failure to the current synthetic grafts. Spontaneous …