Results 211 to 220 of about 1,843 (253)

HYDROXYLAPATITE COATINGS

Annals of the New York Academy of Sciences, 1988
Four coating techniques were evaluated to determine which is most suitable for producing a dense, highly adherent coating onto metallic and ceramic implant materials. Two of the selected coating methods have serious limitations for use in this particular application, and did not meet the specified criteria for satisfactory coating as defined in the ...
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Comparison of the Weibull characteristics of hydroxyapatite and strontium doped hydroxyapatite

Journal of the Mechanical Behavior of Biomedical Materials, 2013
The effects of two strontium (Sr) additions, 5% and 10% of the total calcium (Ca) content, on the phase assemblage and Weibull statistics of hydroxyapatite (HA) are investigated and compared to those of undoped HA. Sintering was carried out in the range of 900-1200 °C in steps of 1000 °C in a conventional furnace.
Chokchai, Yatongchai, Anthony W, Wren, Declan J, Curran, Jean-Christophe, Hornez, Towler, Mark R   +4 more
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Laser surface modification of hydroxyapatite and glass-reinforced hydroxyapatite

Biomaterials, 2004
Surface treatment of materials with excimer laser radiation often results in the formation of a rough columnar or cone-shaped surface topography, which leads to a considerable increase in the surface area. As a result, the search for a non-porous bioactive material with adequate mechanical properties and a high surface to volume ratio, similar to ...
Ana C, Queiroz, José D, Santos, Rui, Vilar, Sónia, Eugénio, Fernando J, Monteiro   +4 more
openaire   +2 more sources

Processing and mechanical properties of hydroxyapatite reinforced with hydroxyapatite whiskers

Biomaterials, 1996
Hydrothermally synthesized HAp fine crystals/HAp whiskers mixtures have been used for the preparation of HAp/0-30% (whiskers) composites. The composites have been fabricated by pressureless sintering and hot-pressing. The best mechanical properties and the highest densities have been achieved for composites hot pressed at 1000 degrees C (2 h, 30 MPa in
Wojciech SUCHANEK, Masatomo YASHIMA, Masato KAKIHANA, Masahiro YOSHIMURA   +3 more
openaire   +2 more sources

Hydroxyapatite

2008
Alexandra Porter, Nelesh Patel, Serena Best   +2 more
  +7 more sources

Colloidal processing of hydroxyapatite

Biomaterials, 2001
Reliable bioceramics are needed to implement the high requirements that living tissues demand. This work focuses on the processing steps necessary to manufacture advanced ceramics that can be used as implant devices. The influence of the heat treatment temperature on the characteristics of a precipitated hydroxyapatite (OHAp) powder was evaluated in ...
L M, Rodríguez-Lorenzo, M, Vallet-Regí, J M, Ferreira   +2 more
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Hydroxyapatite

Plastic and Reconstructive Surgery, 2002
Matthew J. Kraay, Victor M. Goldberg
openaire   +3 more sources

Aggregation of hydroxyapatite crystals

Biochimica et Biophysica Acta (BBA) - General Subjects, 1976
A system to study the aggregation of hydroxyapatite crystals was developed. The effect of several factors (Ca2+ x Pi product, Ca2+/Pi ratio, pH, and various substances) were tested. Pb2+, Zn2+, Mg2+ and methyleneblue had only small effects; citrate inhibited aggregation.
N M, Hansen, R, Felix, S, Bisaz, H, Fleisch   +3 more
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Srapping Hydroxyapatite Implants

Ophthalmic Surgery, Lasers and Imaging Retina, 1999
Abstract: Hydroxyapatite (HA) implants currently are most commonly wrapped in fresh unprocessed human donor sclera before implantation to facilitate entry into the orbital space and allow extraocular muscle attachment. Autologous temporalis fascia or autologous fascia lata are alternatives, but prolong surgery time and require a second operative site ...
D R, Jordan, S R, Klapper
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Hydroxyapatite Chromatography (HAC)

2023
Hydroxyapatite (HA) is a mixed-mode media that has been used extensively for the purification of proteins and DNA since the 1950s. Hydroxyapatite possesses a distinctive selectivity that may be applied in the purification of a wide range of biomolecules: immunoglobulins, alkaline proteins, acidic proteins, and DNA.
openaire   +2 more sources