Abstract: A biological tissue rootage face (30) capable of closely bonding to a biological tissue (H, S) is composed of a biocompatible material and has numerous fingertip-shaped microvilli (41). The microvilli (41) have tip diameters in the order of nanometers. An implant (1) has the biological tissue rootage face (30) on a surface (11, 24) configured to root into a biological tissue (H, S). In a method for forming the biological tissue rootage face (30), a surface of a biocompatible material is subjected to laser nonthermal processing carried out by emitting a laser beam in air, to form numerous fingertip-shaped microvilli (41). The laser beam is a laser beam of an ultrashort pulse laser.

Abstract: A biological tissue rootage face (30) capable of closely bonding to a biological tissue (H, S) is composed of a biocompatible material and has numerous fingertip-shaped microvilli (41). The microvilli (41) have tip diameters in the order of nanometers. An implant (1) has the biological tissue rootage face (30) on a surface (11, 24) configured to root into a biological tissue (H, S). In a method for forming the biological tissue rootage face (30), a surface of a biocompatible material is subjected to laser nonthermal processing carried out by emitting a laser beam in air, to form numerous fingertip-shaped microvilli (41). The laser beam is a laser beam of an ultrashort pulse laser.

Abstract: A biological tissue rootage face (30) capable of closely bonding to a biological tissue (H, S) is composed of a biocompatible material and has numerous fingertip-shaped microvilli (41). The microvilli (41) have tip diameters in the order of nanometers. An implant (1) has the biological tissue rootage face (30) on a surface (11, 24) configured to root into a biological tissue (H, S). In a method for forming the biological tissue rootage face (30), a surface of a biocompatible material is subjected to laser nonthermal processing carried out by emitting a laser beam in air, to form numerous fingertip-shaped microvilli (41). The laser beam is a laser beam of an ultrashort pulse laser.

Abstract: A stem (3) includes: a body section (10) which is inserted into a narrowing hole (Ha) formed in a femur (H) and osseointegrated; a neck section (20) which is joined to a tip of the body section (10) and protrudes from the narrowing hole (Ha) to transmit a load from an acetabular side to the body section (10); and a leg section (25) which is joined to a distal end of the body section (10) to hold a posture of the body section (10), wherein the neck section (20) and the leg section (25) are made of a biocompatible resin, and the body section (10) is made of a biocompatible metal, a biocompatible ceramic, or a biocompatible resin.

Abstract: A fixture (10) to be embedded in a bone (H), comprising: a fixture body (11) through which a central hole (13) penetrates over the entire length thereof; and a cap body (21) which closes an opening on a root end side of the central hole (13). The cap body (21) has a first shaft section (24) to be fitted into the central hole (13). The central hole (13) has a first tapered hole section (14) which decreases in diameter from the root end side toward a top end side, and the cap body (21) has a first tapered shaft section (25) to be fitted into the first tapered hole section (14).

Abstract: A biological tissue rootage face (30) capable of closely bonding to a biological tissue (H, S) is composed of a biocompatible material and has numerous fingertip-shaped microvilli (41). The microvilli (41) have tip diameters in the order of nanometers. An implant (1) has the biological tissue rootage face (30) on a surface (11, 24) configured to root into a biological tissue (H, S). In a method for forming the biological tissue rootage face (30), a surface of a biocompatible material is subjected to laser nonthermal processing carried out by emitting a laser beam in air, to form numerous fingertip-shaped microvilli (41). The laser beam is a laser beam of an ultrashort pulse laser.

Abstract: A prosthesis-packaging case (20) comprises a primary packaging case (30) for housing a prosthesis (10) and a secondary packaging case (40) for housing the primary packaging case (30), wherein the prosthesis (10) and the primary packaging case (30) are respectively made of a material containing zirconia, the secondary packaging case (40) is made of a heat-resistant material, and the prosthesis (10) is subjected to ?-ray sterilization treatment and heat treatment while double-packaged with the primary packaging case (30) and secondary packaging case (40) to change a color of the prosthesis (10) to a color approximate to that of a natural bone.

Abstract: A fixture (10) to be embedded in a bone (H), comprising: a fixture body (11) through which a central hole (13) penetrates over the entire length thereof; and a cap body (21) which closes an opening on a root end side of the central hole (13). The cap body (21) has a first shaft section (24) to be fitted into the central hole (13). The central hole (13) has a first tapered hole section (14) which decreases in diameter from the root end side toward a top end side, and the cap body (21) has a first tapered shaft section (25) to be fitted into the first tapered hole section (14).

Abstract: A prosthesis-packaging case (20) comprises a primary packaging case (30) for housing a prosthesis (10) and a secondary packaging case (40) for housing the primary packaging case (30), wherein the prosthesis (10) and the primary packaging case (30) are respectively made of a material containing zirconia, the secondary packaging case (40) is made of a heat-resistant material, and the prosthesis (10) is subjected to ?-ray sterilization treatment and heat treatment while double-packaged with the primary packaging case (30) and secondary packaging case (40) to change a color of the prosthesis (10) to a color approximate to that of a natural bone.

Abstract: A prosthesis that contains zirconia and supplements a defective portion of a natural bone, and that is changed to a color approximate to that of the natural bone by a heat treatment after a ?-ray sterilization treatment. The color approximate to that of the natural bone has an L* value of 60 to 90, an a* value of ?5 to 10, and a b* value of ?5 to 10 in the L*a*b* color space. The highest temperature in the heat treatment is 100° C. to 300° C. The prosthesis is a fixture of a dental implant embedded into and bonded to a natural bone, an abutment, an implant crown, and the like.

Abstract: A prosthesis that contains zirconia and supplements a defective portion of a natural bone, and that is changed to a color approximate to that of the natural bone by a heat treatment after a ?-ray sterilization treatment. The color approximate to that of the natural bone has an L* value of 60 to 90, an a* value of ?5 to 10, and a b* value of ?5 to 10 in the L*a*b* color space. The highest temperature in the heat treatment is 100° C. to 300° C. The prosthesis is a fixture of a dental implant embedded into and bonded to a natural bone, an abutment, an implant crown, and the like.