Title:
SHAPE MEMORY IN-VIVO DECOMPOSITION ABSORPTIVE MATERIAL
Document Type and Number:
Japanese Patent JP3503045
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a shape memory in-vivo decomposition absorptive material which ensures the simple execution of procedures, such as suture, anastomosis, ligature, conjugation, reconstruction and prosthesis, of vital tissues without the burn thereof, obviates the occurrence of the halation of MRI and CT and does not remain in the living body.
SOLUTION: This material consists of a molding of a lactic acid based polymer and is restored in its shape to the memorized shape when heated to a prescribed temp. or above even if external force is not applied thereon. The molding (primary molding) of the prescribed shape of the lactic acid based polymer is subjected to a deformation treatment at a temp. higher than its glass transition temp. and lower than its crystallization temp. (100°C when there is no crystallization temp.) to the molding (secondary molding) of another shape. The molding is cooled as it is at the temp. lower than the glass transition temp., by which the shape is fixed. When the material is reheated to the deformation treatment temp. described above or above, the shape is instantaneously restored to the molding of the initial prescribed shape and the lactic acid based polymer is hydrolyzed and absorbed in the living body.
Inventors:
Yasuo Shikinami
Application Number:
JP13933997A
Publication Date:
March 02, 2004
Filing Date:
May 13, 1997
Export Citation:
Assignee:
Takiron Co., Ltd.
International Classes:
A61B17/04; A61B17/58; A61B17/72; A61B17/80; A61L17/00; A61L27/00; A61B17/00; (IPC1-7): A61L17/00; A61B17/04; A61B17/58; A61L27/00
Domestic Patent References:
| JP9221539A | ||||
| JP6319794A | ||||
| JP1192367A | ||||
| JP1198552A | ||||
| JP464363A |
Attorney, Agent or Firm:
KAWASAKI Maki