Spherical hydroxyapatite particles and process for the...

C - Chemistry – Metallurgy – 01 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C01B 25/32 (2006.01) A61L 27/12 (2006.01) A61L 27/32 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2257290

A process for producing spherical, non-porous hydroxyapatite particles having a size which does not exceed 250 microns and having a density of at least 3.00 g/cc. The process comprises agglomerating in the presence of water as the only additive hydroxyapatite powder feedstock having a purity of at least 97 %, and having metallic impurities which do not exceed 500 ppm, to form hydroxyapatite particles having a size which does not exceed 350 microns. The particles are then dried and then sintered at a temperature from about 1,100 ~C to about 1,200 ~C to provide spherical, non-porous hydroxyapatite particles which do not exceed 250 microns and having a density of at least 3.00 g/cc. Such particles have a variety of medical uses, including bone replacement, implant coatings, and dental applications such as alveolar ridge augmentation, root extraction site fillings, restoration of periodontal osseous lesions, and soft tissue augmentations.

Procédé de production de particules sphériques non poreuses d'hydroxyapatite ayant une taille n'excédant pas 250 microns et une densité d'au moins 3,00 g/cm?3¿. Le procédé consiste en l'agglomération en présence d'eau comme seul additif d'un matériau d'alimentation à base d'hydroxyapatite pulvérulent ayant une pureté d'au moins 97 % et ayant des impuretés métalliques n'excédant pas 500 ppm afin d'obtenir des particules d'hydroxyapatite dont la taille ne dépasse pas 350 microns. Les particules sont ensuite séchées puis frittées à une température allant de 1 100 ·C à environ 1 200 ·C pour produire des particules sphériques et non poreuses d'hydroxyapatite qui ne dépassent pas 250 microns et dont la densité est d'au moins 3,00 g/cm?3¿. De telles particules ont plusieurs applications médicales, y compris le remplacement des os, les revêtements d'implants et les applications dentaires telles que l'augmentation de la crête alvéolaire, obturations de cavités après extraction de racines de dents, restauration de lésions osseuses périodontiques, et augmentations des tissus mous.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Spherical hydroxyapatite particles and process for the... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spherical hydroxyapatite particles and process for the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spherical hydroxyapatite particles and process for the... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1382446

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.