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A resolution-enhanced Fourier Transform Infrared (FTIR) Spectroscopic study of the CO3(2-) ion in pig enamel of increasing age and maturity has demonstrated the existence of four different, main carbonate locations. The major CO3(2-) site arises as a result of the substitution of CO3(2-) ions in the positions occupied by PO4(3-) ions in the apatitic… (More)
OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible.
Digital image manipulation software is now readily available on personal computers. It is therefore very simple to tamper with any image and make it available to others. Insuring digital image integrity has therefore become a major issue. Watermarking has become a popular technique for copyright enforcement and image authentication. The aim of this paper is… (More)
The question of whether the apatite crystals of bone contain hydroxyl groups was explored using magic angle spinning, proton nuclear magnetic resonance spectroscopy, and resolution enhanced Fourier transform infrared spectroscopy. The powdered bone samples were heated at 300 degrees C in air, in CO2 at 4 bar atmosphere, and at 300 degrees C in air and… (More)
Most calcium phosphates used as biomaterials are well characterized high temperature compounds presenting both bulk and surface properties very different from those of bone mineral. The composition and structure of biomaterials and bone mineral are discussed in order to highlight the differences and determine their consequences on biological behaviour.
We have developed low temperature nonaqueous solution methods as well as low power plasma ashing for the degradation of the organic matrix of bone power which have permitted us to obtain bone crystals essentially free of organic matrix constituents without any significant change in their composition, overall structure, or internal short-range order. We have… (More)
To assess possible differences between the mineral phases of cortical and cancellous bone, the structure and composition of isolated bovine mineral crystals from young (1-3 months) and old (4-5 years) postnatal bovine animals were analyzed by a variety of complementary techniques: chemical analyses, Fourier transform infrared spectroscopy (FTIR), X-ray… (More)
PURPOSE To review the use of thoracic endovascular aortic repair (TEVAR) for late pseudoaneurysm formation after surgical repair of aortic coarctation. METHODS From May 2001 to May 2005, 8 patients (5 men; mean age 47.6 years, range 18-73) with a history of aortic coarctation repairs 17 to 40 years prior were referred to our institution for an anastomotic… (More)
This study aims to evaluate in vitro the release properties and biological behavior of original compositions of strontium (Sr)-loaded bone mineral cements. Strontium was introduced into vaterite CaCO3 -dicalcium phosphate dihydrate cement via two routes: as SrCO3 in the solid phase (SrS cements), and as SrCl2 dissolved in the liquid phase (SrL cements),… (More)
For the last decades, three trends have grown and reinforced each other: the fast growth of hardware computational capacities, the requirement of finer and larger finite element models for industrial simulations and the development of efficient computational strategies amongst which non-overlapping domain decomposition (DD) methods [2, 3, 4] are very… (More)