PROCESS FOR OBTAINING A RESORBABLE MATERIAL OF BETA-PHOSPHATE TRICALCIUM

摘要

The invention relates to a process for preparing a material with regenerative properties, used as bone substitute material in the orthopedic and oral and maxillofacial surgery. The claimed material is prepared by carrying out, in a first step, a porous ceramic structure of &bgr; -TCP, by precipitating in distilled water solutions of 30% concentration of ammonium hydrogen phosphate and calcium nitrate tetrahydrate at 38°C, for 60 min, while stirring at 800 rpm, at a controlled pH of 8...8.5, filtering, washing and drying for 12 h in a cabinet dryer, followed by calcining at 800°C for 2 h and preparing a ceramic suspension with a solid content of 75% by homogenization with sodium polyacrylate and polyethylene oxide, impregnating a polyurethane foam, drying, sintering and sterilizing the resulting porous ceramic structure, then, in a second step, the ceramic structure is screened on sieves with meshes of 45...125 μm, 125...250 μm, 500...1000 μm and 1000...2000 μm, there resulting a reproducible material of resorbable &bgr; -TCP as four size-types, with apparent densities within the range of 1.186...0.7905 g/cm.