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US 9,517,293 B2Granted
Tricalcium phosphates, their composites, implants incorporating them, and methods for their production
AssigneePioneer Surgical Technology, Inc.
InventorEdward S. Ahn
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Abstract
Methods for the synthesis of tricalcium phosphates are presented, as well as a series of specific reaction parameters that can be adjusted to tailor, in specific ways, properties in the tricalcium phosphate precursor precipitate. Particulate tricalcium phosphate compositions having an average crystal size of about 250 nm or less are provided. Compositions of the invention can be used as prosthetic implants and coatings for prosthetic implants.
Claims10
A method for preparing particulate TCP comprising:
- (i) precipitating a TCP precursor from a solution containing a calcium source to a phosphate source, wherein the pH of the mixture is about 5 to about 11,
- (ii) aging the precipitated TCP precursor,
- (iii) controlling the conditions of steps (i) and (ii) so as to produce a TCP precursor precipitate having an average crystal size of 250 nm or less,
- (iv) collecting the TCP precursor precipitate,
- (v) drying the TCP precursor,
- (vi) milling the TCP precursor, and
- (vii) calcining the TCP precursor to obtain a particulate TCP having an average crystal size of 250 nm or less, a surface area of about 20 m2/g and particle size of 5 μm or less.
4 more elements
Dependencies are inferred from the claim text.