Biological tissue rootage face, implant, method for forming biological tissue rootage face, and method for producing implant
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.
1. A method for forming a biological tissue rootage face capable of rooting into a biological tissue, comprising
a first step of forming a large groove on a surface; and
a second step of forming a small groove on an inner surface of the large groove and simultaneously forming a rough surface on an inner surface of the small groove, the rough surface having numerous fingertip-shaped microvilli;
wherein the large groove is formed by molding, machining or laser thermal processing and the small groove and the rough surface are formed by laser nonthermal processing;
wherein each of the fingertip-shaped microvilli has a tip diameter of less than 1000 nanometers.
2. The method for forming the biological tissue rootage face according to claim 1 ,
wherein the laser nonthermal process uses an ultrashort pulse laser.
3. The method for forming the biological tissue rootage face according to claim 2 ,
wherein the ultrashort pulse laser is a picosecond laser or a femtosecond laser.
4. A method for producing an implant capable of rooting into a biological tissue, comprising a step of forming a surface capable of rooting to the biological tissue which includes the method for forming the biological tissue rootage face according to claim 1 .
5. A method for forming a biological tissue rootage face capable of rooting into a biological tissue, comprising:
a step of subjecting a surface of a biocompatible material to a laser nonthermal process to form a groove and simultaneously forming a rough surface having numerous fingertip-shaped microvilli on an inner surface of the groove;
wherein each of the fingertip-shaped microvilli has a tip diameter of less than 1000 nanometers.
6. The method for forming the biological tissue rootage face according to claim 5 , wherein the laser nonthermal process uses an ultrashort pulse laser.
7. The method for forming the biological tissue rootage face according to claim 6 , wherein the ultrashort pulse laser is a picosecond laser or a femtosecond laser.
8. A method for producing an implant capable of rooting into a biological tissue, comprising a step of forming a surface capable of rooting to the biological tissue which includes the method for forming the biological tissue rootage face according to claim 5 .
9. A method for forming a biological tissue rootage face capable of rooting into a biological tissue by subjecting a surface of a biocompatible material to laser nonthermal processing carried out by emitting a laser beam in air, comprising:
a first step of forming a large groove on the surface; and
a second step of forming a small groove on an inner surface of the large groove and simultaneously forming a rough surface on an inner surface of the small groove, the rough surface having numerous fingertip-shaped microvilli;
wherein each of the fingertip-shaped microvilli has a tip diameter of less than 1000 nanometers.
10. The method for forming the biological tissue rootage face according to claim 9 , wherein the laser beam is a laser beam of an ultrashort pulse laser.
11. The method for forming the biological tissue rootage face according to claim 10 , wherein the ultrashort pulse laser is a picosecond laser or a femtosecond laser.
12. A method for producing an implant capable of rooting into a biological tissue, comprising
a step of forming a surface capable of rooting to the biological tissue which includes the method for forming the biological tissue rootage face according to claim 9 .