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US 6,908,506 B2Granted
Magnesium ammonium phosphate cement composition
AssigneeKyphon Inc.
InventorMichael Zimmermann
Life of this patent
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Abstract
This invention relates to a cement, which comprises in its main phase of microcrystalline magnesium ammonium phosphate and nanoapatite after hardening and thus at the same time has considerable strength. The material is biologically degradable and is suitable for application in tooth cements, as bone replacement, as bone filler, as bone cement or as bone adhesive.
Claims43
A magnesium ammonium phosphate cement preparation comprising:
- a powder mixture having molar quantities of the components calcium (Ca), magnesium (Mg) and orthophosphate (P) in the mixture in the ranges 1<Ca/P<1.5 and Mg/P<0.5;
- and
- an ammonium salt.
A magnesium ammonium phosphate cement preparation comprising:
- a powder mixture comprising α-TCP, β-TCP, MgHPO4.3H2O, KH2PO4 and Na2HPO4;
- and
- an ammonium salt.
A magnesium ammonium phosphate cement preparation comprising:
- a powder mixture comprising α-TCP, β-TCP, (NH4)2SO4, KH2PO4 and Na2HPO4;
- and
- a magnesium salt.
A magnesium ammonium phosphate cement preparation comprising:
- a powder mixture comprising α-TCP, β-TCP, primary or secondary ammonium phosphate, KH2PO4 and Na2HPO4;
- and
- a magnesium salt.
Dependencies are inferred from the claim text.