Polymer cement for percutaneous vertebroplasty
First Claim
1. A binary composition comprising a liquid component L and a powder component P,wherein the liquid component comprises a methylmethacrylate monomer, a polymerization activator, and stabilizer;
- wherein the powder component comprises a polymethylmethacrylate homopolymer, a polymerization initiator and at least 35% of a radio-opaque composition, wherein the radio-opaque composition comprises 30-45% of a radio-opaque compound and 5-10% calcium phosphate, andwherein the powder component P and the liquid component L are provided in a weight ratio P/L between 1.4 and 1.5.
2 Assignments
0 Petitions
Accused Products
Abstract
A fluid cement for medical use for bone reconstruction, in particular for filling the vertebral body, and a binary composition which is intended for the preparation of such a cement. A device for conditioning the binary composition, and a method of preparing a bone cement from a binary composition. The fluid cement according to the invention comprises: a) approximately 70% to 85% by weight of a polymer comprising a polymethylmethacrylate and a methylmethacrylate monomer, and b) approximately from 15 to 30% by weight of a radio-opaque composition. Preferably, the radio-opaque composition comprises a radio-opacifier, such as a barium sulphate and zirconium dioxide, in a mixture with a calcium phosphate, for example hydroxyapatite.
10 Citations
11 Claims
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1. A binary composition comprising a liquid component L and a powder component P,
wherein the liquid component comprises a methylmethacrylate monomer, a polymerization activator, and stabilizer; -
wherein the powder component comprises a polymethylmethacrylate homopolymer, a polymerization initiator and at least 35% of a radio-opaque composition, wherein the radio-opaque composition comprises 30-45% of a radio-opaque compound and 5-10% calcium phosphate, and wherein the powder component P and the liquid component L are provided in a weight ratio P/L between 1.4 and 1.5. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A fluid cement, for medical use, for filling the vertebral body, comprising:
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a) approximately 80% by weight of a polymer comprising a polymethylmethacrylate homopolymer, methylmethacrylate monomer, a polymerization activator, initiator, and stabilizer; and b) approximately 20% by weight of a radio-opaque composition, wherein the radio-opaque composition comprises a radio-opaque compound and hydroxyapatite, wherein the radio-opaque compound makes up approximately 14% by weight of the fluid cement, and wherein the calcium phosphate makes up approximately 6% by weight of the fluid cement.
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9. A fluid cement, for medical use, for filling the vertebral body, comprising:
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a) approximately 76% by weight of a polymer comprising a polymethyimethacrylate homopolymer, methylmethacrylate monomer, a polymerization activator, initiator, and stabilizer; and b) approximately 24% by weight of a radio-opaque composition, wherein the radio-opaque composition comprises a radio-opaque compound and hydroxyapatite, wherein the radio-opaque compound makes up approximately 18% by weight of the fluid cement, and wherein the calcium phosphate makes up approximately 6% by weight of the fluid cement.
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10. A fluid cement, for medical use, for filling the vertebral body, comprising:
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a) approximately 70% by weight of a polymer comprising a polymethylmethacrylate homopolymer, methylmethacrylate monomer, a polymerization activator, initiator, and stabilizer; and b) approximately 30% by weight of a radio-opaque composition, wherein the radio-opaque composition comprises a radio-opaque compound and hydroxyapatite, wherein the radio-opaque compound makes up approximately 24% by weight of the fluid cement, and wherein the hydroxyapatite makes up approximately 6% by weight of the fluid cement.
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11. A fluid cement, for medical use, for filling the vertebral body, comprising:
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a) approximately 70% by weight of a polymer comprising a polymethylmethaerylate homopolymer, methylmethacrylate monomer, a polymerization activator, initiator, and stabilizer; and b) approximately 30% by weight of a radio-opaque composition, wherein the radio-opaque composition comprises a radio-opaque compound and hydroxyapatite, wherein the radio-opaque compound makes up approximately 27% by weight of the fluid cement, and wherein the hydroxyapatite makes up approximately 3% by weight of the fluid cement.
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Specification