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.
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Showing 1 to 20 of 23 for “"Bioceramic"”.
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Novel processing of porous bioceramic structures
… 100 – 400 μm and porosity >90%, are preferred. Bioceramics have been used in numerous orthopaedic applications since the 1960s. While bioinert materials such as zirconia have been used in load bearing applications due to their impressive mechanical properties, bioactive materials such as …
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Resorption rate tunable bioceramic: Si,Zn-modified tricalcium phosphate
<p>An ideal bone implant material would support the activity of osteoblasts in the development of new bone, while simultaneously being resorbed by osteoblasts as part of the lifelong orderly process of bone remodeling. Silicon and Zinc modified tricalcium phosphate (Si,Zn-TCP), a biphasic material, …
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Bond strength of calcium silicate based bioceramic sealers to dentin
… The aim of this study was to compare available bioceramic sealers and resin based sealer on their push out and shear bond strength. MATERIALS AND METHODS: Three calcium silicate based bioceramic sealers: Endosequence BC sealer (Brasseler), BioRoot RCS (Septodont) and Edge Bioceramic Sealer …
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Development and characterization of bioceramic coatings for medicall and dental applications
Hydroxyapatite (HA), which is a natural component of bone tissue, is already being marketed as a coating for the metal shafts of hip implants as well as dental screws and other endoprostheses with the expectation of improved bonding to bone through osseointegration. Coatings prepared by the more …
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Retreatability of root canals obturated using a bioceramic sealer and gutta percha
Statement of problem: Although bioceramic endodontic sealer cements offer various advantages over conventional zinc oxide-based and resin-based cements, questions have been raised about the ability to retreat root canals that have been sealed using these cements. Aims and Objectives: The aim of the …
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Hydrothermally extracted nanohydroxyapatite from bovine bone as bioceramic and biofiller in bionanocomposite
… used to fabricate two types of biomaterials (HAP bioceramics and PLA/n-HAP bionanocomposite). The raw-HAP and calcined n-HAP powder samples were compacted into green bodies and were sintered at various temperatures (1000-1400°C) to produce HAP bioceramics. The best calcined n-HAP was mixed with …
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ASSESSMENT OF ANTIBACTERIAL EFFECT AND FLOWABILITY OF BIOCERAMIC SEALER MODIFIED WITH BaTiO3 NANOPARTICLES
Introduction: One of the main causes of endodontic treatment failures is the persistence of microorganisms within the root canal systems. Piezoelectric materials, including barium titanate (BaTiO3), offer antibacterial effects. The aim of this project is to develop an endodontic sealer embedded …
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Mechanical Agitation Effects on Physical Properties of Calcium-Silicate-Cement Sealers
… a surge in pre-mixed Calcium-Silicate-Cement (Bioceramic) Sealers. Requirements for sealers are listed in ISO 6876:2012. This study investigated real-time setting reactions and effects of mechanical agitation on flow, film thickness, and setting time of calcium-silicate-cement sealer …
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pH Stability of Calcium Hydroxide Preparations in a Simulated Acidic Environment
… of three calcium hydroxide preparations—BC Temp (bioceramic-based), UltraCal XSTM, and mixed Ca(OH)₂ powder with saline—in simulated acidic and neutral environments. Materials and Methods 30 decoronated, single-rooted premolars were prepared using rotary files. The canals were treated with sodium …
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Fabrication and evaluation of inorganic-organic composites for bone tissue engineering /
… work is to develop multifunctional inorganic (bioceramic) -organic (polymeric) composites as potential substitutes for bone tissue.
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Nanoscale influences on bioactivity : ultrastructure and nanomechanics of model bioactive hydroxyapatite based biomaterials
… applications. Three model synthetic HA based bioceramic systems were examined; phase pure, dense, polycrystalline HA; phase pure, dense, polycrystalline HA with 0.8 wt% silicon substituted into the lattice (SiHA); and phase pure, dense, nanostructured HA (nanoHA) with grain sizes less than 100 …
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Nanostructured apatites as orthopedic biomaterials
… considerable interest. Though a commonly used bioceramic, HAP has been limited by its processability. This material is sensitive to non-stoichiometry and impurities during synthesis and processing due to its complex composition and crystal structure (Ca10(P04)6(OH)2, P63/m).
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Optimisation of plasma sprayed hydroxyapatite coatings
Hydroxyapatite, (HA), is a calcium phosphate bioceramic material which has an almost identical chemical composition to that of the mineral component of bone. Its biocompatibility and osteoconductivity have led to its use in a wide range of applications in both dentistry and orthopaedics. One such …
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Ab initio computational applications to complex biomolecular systems
… model and interfaces between biomolecules and bioceramic materials in the future.
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Effect of low concentrations of antibiotic intracanal medicaments on crown discoloration and push-out bond strength
… MTA cement, Biodentine cement, or Endosequence Bioceramic putty cement for two weeks. Then, two root cylinders were obtained from each root and push-out bond strength testing was performed. For the crown discoloration experiment, 160 crowns were obtained from intact human molars and randomized …
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Histologic evaluation of calcium phosphate coated endosseous implants prepared by spark discharge oxidation : a long-term study in the sheep
… layers of two implant types were coated with bioceramics during the oxidation process (type 1 and type 2), whereas a third implant was successively coated by hydroxyapatite-(HA-)gel immersion successive to the oxidation process (type 3). Experimental bioceramic coatings consisted of pure …
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3D printing of bone scaffolds using powders derived from biogenic sources
… powder was used to fabricate porous bioceramic scaffolds by binder jetting 3D printing. Due to serious technical issues related to the printing of a nanosized powder, 10 wt% of bio-derived powder was mixed with a glass-ceramic powder with bigger particle size. Moreover, the organic …
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