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Three dimensional cell protector/pore architecture formation for bone and tissue constructs

  • US 7,713,542 B2
  • Filed: 05/18/2005
  • Issued: 05/11/2010
  • Est. Priority Date: 01/14/2005
  • Status: Expired due to Fees
First Claim
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1. A moldable implant material for implantation of living cells, comprising:

  • (a) at least one living cell;

    (b) a cell protector material, characterized in that the cell protector material is biocompatible with said at least one living cell, biodegradable in situ subsequent to implantation,-in the form of rods or tubes having a diameter in the range of about 0.001 mm to 10 mm and a length in the range of about 10 mm to 1 mm, and the rods or tubes interconnect to form a three-dimensional, interconnected structure; and

    (c) a matrix material, characterized in that the matrix material is, at least in part, biocompatible in vivo, hardenable in situ subsequent to implantation, and comprises a calcium and phosphorous compound selected from the group consisting of tetracalcium phosphate (Ca4[PO4]2O, TTCP) based self-hardening calcium phosphate cements, alpha-tricalcium phosphate (alpha-TCP, α

    -Ca3[PO4]2) based self-hardening calcium phosphate cements, beta-tricalcium phosphate (beta-TCP, β

    -Ca3[PO4]2) based self-hardening calcium phosphate cements, dicalcium phosphate anhydrous (DCPA, CaHPO4) based self-hardening calcium phosphate cements, dicalcium phosphate dihydrate (DCPD, CaHPO4·

    2H2O) based self-hardening calcium phosphate materials, amorphous calcium phosphate-based self-hardening, calcium phosphate materials, and combinations thereof;

    wherein the cell protector material substantially encapsulates the at least one living cell; and

    wherein the cell protector material, comprising the at least one living cell, is contained, at least in part, within the matrix material.

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