Back to results
US 7,540,914 B2Granted
Magnesium ammonium phosphate cement composition
AssigneeKyphon SARL
InventorMichael Zimmermann
Life of this patent
Estimating the term…
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.
Claims65
A magnesium ammonium phosphate cement preparation comprising:
- a) a powder mixture comprising an α-tertiary calcium phosphate (TCP), a β-tertiary calcium phosphate (TCP), or combination thereof;
- and a magnesium phosphate selected from MgHPO4.3H2O or Mg3(PO4)2;
- and
- b) an ammonium salt.
1 more element
A composition comprising:
- a) an ammonium salt;
- and
- b) a powder mixture comprising an α-tertiary calcium phosphate (TCP), a β-tertiary calcium phosphate (TCP), or combination thereof;
- and a magnesium phosphate selected from MgHPO4.3H2O or Mg3(PO4)2, the powder mixture further comprising strontium in an amount of weight percent of the composition such that when the powder mixture and the ammonium salt are combined, the ammonium salt and the powder mixture form a magnesium ammonium phosphate cement preparation, wherein the expansivity of the cement preparation is adjusted by the proportion of the strontium added.
1 more element
A method of repairing or replacing bone comprising:
- a) combining a powder mixture with a mixing liquid to obtain a cement paste, the powder mixture comprising an α-tertiary calcium phosphate (TCP), a β-tertiary calcium phosphate (TCP), or combination thereof;
- and a magnesium phosphate selected from MgHPO4.3H2O or Mg3(PO4)2, and an amount of strontium to cause the cement paste to expand during hardening;
- and the mixing liquid comprising an ammonium salt;
- and
- b) applying the paste to or into a target zone of a bone.
2 more elements
A magnesium ammonium phosphate cement preparation comprising:
- a) a powder mixture comprising an α-tertiary calcium phosphate (TCP) and a magnesium phosphate comprising MgHPO4;
- and
- b) an ammonium salt.
A method of repairing or replacing bone comprising:
- a) combining a powder mixture with a mixing liquid to obtain a cement paste, the powder mixture comprising an α-tertiary calcium phosphate (TCP), a magnesium phosphate comprising MgHPO4, and an amount of strontium to cause the cement paste to expand during hardening;
- and the mixing liquid comprising an ammonium salt;
- and
- b) applying the paste to or into a target zone of a bone.
1 more element
Dependencies are inferred from the claim text.