Polymeric acrylic prothesis

Claim 2

A packing material for forming in vivo prosthetic implants for hard tissue, the packing material comprising disjoint micron sized particles, each particle having an inner core comprised of a first biologically-compatible polymeric material and having an outer coating generally surrounding the inner core, the outer coating being comprised of a second biologically-compatible polymeric material, the second polymeric material being hydrophilic and having a composition different from the composition of the first polymeric material, each particle incorporating a sufficient quantity of barium sulfate to render a prosthetic implant formed of a compacted mass of the particles visible in an X-ray radiograph, the particles being of a size to permit a mass of the disjoint particles to be packed in a body cavity having at least one surface comprised of a hard tissue to form a prosthetic implant for the hard tissue with interstices between compacted particles of the prosthetic implant forming pores into which tissue can grow.

Claim 3

The packing material of claim 1 in which the diameter of the particles is in the range of from about 590 microns to about 840 microns.

Claim 4

The packing material of claim 2 in which the cores of the particles are composed of an acrylic polymeric material.

Claim 5

The packing material of claim 3 in which the cores of the particles are polymethylmethacrylate beads.

Claim 6

The packing material of claim 4 in which the polymethylmethacrylate beads include a plasticizer.

Claim 7

The packing material of claim 3 in which the cores of the particles are composed of a copolymer of methylmethacrylate and a comonomer.

Claim 8

The packing material of claim 3 in which the hydrophilic polymeric material is a polymeric hydroxyethylmethacrylate.

Claim 9

A packing material for forming in vivo prosthetic implants for hard tissue, the packaging material comprising disjoint particles, having a diameter in the range of from about 590 microns to about 840 microns, each particle having an inner core comprised of a biologically-compatible acrylic polymeric material and having an outer coating generally surrounding the inner core, the outer coating being comprised of a biologically-compatible hydrophilic polymeric hydroxyethylmethacrylate material, the ratio of the weight of the polymeric hydroxyethylmethacrylate to the weight of the cores of the particles is in the range of from about 0.04 to about 0.07, each particle incorporating a sufficient quantity of barium sulfate to render a prosthetic implant formed of a compacted mass of the particles visible in an X-ray radiograph, the particles being of a size to permit a mass of the disjoint particles to be packed in a body cavity having a least one surface comprised of a hard tissue to form a prosthetic implant for the hard tissue with interstices between compacted particles of the prosthetic implant forming pores into which tissue can grow.

Claim 10

A packing material for forming in vivo prosthetic implants for hard tissue, the packaging material comprising disjoint particles, having a diameter in the range of from about 590 microns to about 840 microns, each particle having an inner core comprised of a biologically-compatible acrylic polymeric material and having an outer coating generally surrounding the inner core, the outer coating being comprised of a biologically-compatible hydrophilic polymeric hydroxyethylmethacrylate material, the ratio of the weight of the polymeric hydroxyethylmethacrylate to the weight of the cores of the particles is in the range of from about 0.04 to about 0.07, each particle incorporating a sufficient quantity of barium sulfate to render a prosthetic implant formed of a compacted mass of the particles visible in an X-ray radiograph, the particles being of a size to permit a mass of the disjoint particles to be packed in a body cavity having a least one surface comprised of a hard tissue to form a prosthetic implant for the hard tissue with interstices between compacted particles of the prosthetic implant forming pores into which tissue can grow.

Claim 11

The packing material of claim 8 in which the polymeric hydroxyethylmethacrylate comprises a copolymer of monomeric hydroxyethylmethacrylate and a cross-linking agent.

Claim 12

The packing material of claim 9 in which the cross-linking agent is triethyleneglycol dimethacrylate.

Claim 13

The packing material of claim 10 in which the ratio of the weight of the triethyleneglycol dimethacrylate to the weight of the monomeric hydroxyethylmethacrylate is in the range of from about 0.01 to about 0.05.

Claim 14

The packing material of claim 8 in which the barium sulfate is located in the coating of hydrophilic polymeric material.

Claim 15

The packing material of claim 12 in which the ratio of the weight of the barium sulfate to the weight of the cores of the particles is in the range of from about 0.25 to about 0.43.

Claim 16

The packing material of claim 13 in which the barium sulfate is in the form of particles having a diameter of less than about one micron.

Claim 17

A packing material for forming in vivo prosthetic implants for hard tissue, the packing material comprising disjoint micron sized particles, each particle having an inner core comprised of a first biologically-compatible polymeric material and having an outer coating generally surrounding the inner core, the outer coating being comprised of a second biologically-compatible polymeric material, the second polymeric material being hydrophilic and having a composition different from the composition of the first polymeric material, each particle incorporating a radio-opaque material, the particles being of a size to permit a mass of the disjoint particles to be packed in a body cavity having at least one surface comprised of a hard tissue to form a prosthetic implant for the hard tissue with interstices between compacted particles of the prosthetic implant forming pores into which tissue can grow.

Claim 18

A packing material for forming in vivo prosthetic implants for hard tissue, the packing material comprising disjoint micron sized particles, each particle having an inner core comprised of a first biologically-compatible polymeric material and having an outer coating generally surrounding the inner core, the outer coating being comprised of a second biologically-compatible polymeric material, the second polymeric material being hydrophilic and having a composition different from the composition of the first polymeric material, each particle incorporating a radio-opaque material, the particles being of a size to permit a mass of the disjoint particles to be packed in a body cavity having at least one surface comprised of a hard tissue to form a prosthetic implant for the hard tissue with interstices between compacted particles of the prosthetic implant forming pores into which tissue can grow.

Claim 19

The packing material of claim 15 in which the diameter of the particles is in the range of from about 590 microns to about 840 microns.

Claim 20

The packing material of claim 16 in which the cores of the particles are composed of an acrylic polymeric material.

Claim 21

The packing material of claim 17 in which the cores of the particles are polymethylmethacrylate beads.

Claim 22

The packing material of claim 18 in which the polymethylmethacrylate beads include a plasticizer.

Claim 23

The packing material of claim 17 in which the cores of the particles are composed of a copolymer of methylmethacrylate and a comonomer.

Claim 24

The packing material of claim 17 in which the hydrophilic polymeric material is a polymeric hydroxyethylmethacrylate.

Claim 25

The packing material of claim 21 in which the ratio of the weight of the polymeric hydroxyethylmethacrylate to the weight of the cores of the particles is in the range of from about 0.04 to about 0.07.

Claim 26

The packing material of claim 22 in which the polymeric hydroxyethylmethacrylate comprises a copolymer of monomeric hydroxyethylmethacrylate and a cross-linking agent.

Claim 27

The packing material of claim 23 in which the cross-linking agent is triethyleneglycol dimethacrylate.

Claim 28

The packing material of claim 24 in which the ratio of the weight of the triethyleneglycol dimethacrylate to the weight of the monomeric hydroxyethylmethacrylate is in the range of from about 0.01 to about 0.05.

Claim 29

The packing material of claim 21 in which the radio-opaque material is barium sulfate.

Claim 30

The packing material of claim 26 in which the barium sulfate is located in the coating of hydrophilic polymeric material.

Claim 31

The packing material of claim 27 in which the ratio of the weight of the barium sulfate to the weight of the cores of the particles is in the range of from about 0.25 to about 0.43.

Claim 32

The packing material of claim 28 in which the barium sulfate is in the form of particles having a diameter of less than about one micron.

Claim 33

A packing material for forming in vivo prosthetic implants for hard tissue, the packing material comprising disjoint micron sized particles, each particle having an inner core comprised of a first biologically-compatible polymeric material and having an outer coating generally surrounding the inner core, the outer coating being comprised of a second biologically-compatible polymeric material, the second polymeric material being hydrophilic and having a composition different from the composition of the first polymeric material, each particle incorporating a sufficient quantity of barium sulfate to prevent bonding between the particles, the particles being of a size to permit a mass of the disjoint particles to be packed in a body cavity having at least one surface comprised of a hard tissue to form a prosthetic implant for the hard tissue with interstices between compacted particles of the prosthetic implant forming pores into which tissue can grow.

Claim 34

A packing material for forming in vivo prosthetic implants for hard tissue, the packing material comprising disjoint micron sized particles, each particle having an inner core comprised of a first biologically-compatible polymeric material and having an outer coating generally surrounding the inner core, the outer coating being comprised of a second biologically-compatible polymeric material, the second polymeric material being hydrophilic and having a composition different from the composition of the first polymeric material, each particle incorporating a sufficient quantity of barium sulfate to prevent bonding between the particles, the particles being of a size to permit a mass of the disjoint particles to be packed in a body cavity having at least one surface comprised of a hard tissue to form a prosthetic implant for the hard tissue with interstices between compacted particles of the prosthetic implant forming pores into which tissue can grow.