Skeletal structure for artificial pinna and artificial cartilaginous tissue, and artificial pinna using same

Patent metadata

Field	Value
Publication number	US-2024293601-A1
Application number	US-202218569841-A
Country	US
Kind code	A1
Filing date	Jun 17, 2022
Priority date	Jun 17, 2021
Publication date	Sep 5, 2024
Grant date	—

Abstract

A skeletal structure for an artificial pinna includes a base portion formed in a flat shape with a fibrous structural body using a bioabsorbable material, and a helix portion and an antihelix portion disposed on the front surface of the base portion. In the skeletal structure, the base portion is provided with a two-dimensional elastic structure, and the helix portion and the antihelix portion are provided with a three-dimensional fiber structure formed with the fibrous structural bodies. Thus, a flexible skeletal structure can be provided.

First claim

1 . A skeletal structure for an artificial pinna comprising:
a base portion formed in a flat shape with a fibrous structural body using a bioabsorbable material; and a helix portion and an antihelix portion disposed on a front surface of the base portion.

2 . The skeletal structure for an artificial pinna according to claim 1 , wherein the base portion is a planar member having a two-dimensional elastic structure formed with the fibrous structural body using the bioabsorbable material.

3 . The skeletal structure for an artificial pinna according to claim 1 , wherein the helix portion and the antihelix portion each have a three-dimensional fiber structure formed with a fibrous structural body using a bioabsorbable material.

4 . The skeletal structure for an artificial pinna according to claim 1 , wherein the helix portion and the antihelix portion are welded to the base portion.

5 . The skeletal structure for an artificial pinna according to claim 1 , further comprising a C cartilage portion disposed on a back surface of the base portion.

6 . An artificial pinna comprising:
the skeletal structure for an artificial pinna according to claim 1 ; a bioabsorbable nonwoven fabric that covers the skeletal structure; and chondrocytes that are cultured on the bioabsorbable nonwoven fabric.

7 . A skeletal structure for an artificial cartilaginous tissue formed by alternately stacking a first layer in which a fibrous structural body using a bioabsorbable material is formed in a wave shape and a second layer adhering closely to the first layer, the second layer being formed in a wave shape with a phase shift relative to the first layer.

8 . A skeletal structure for an artificial cartilaginous tissue formed by alternately stacking a layer in which fibrous structural bodies using a bioabsorbable material are longitudinally arranged and a layer in which fibrous structural bodies are laterally arranged.

9 . A skeletal structure for an artificial cartilaginous tissue formed with the skeletal structure for an artificial cartilaginous tissue according to claim 7 and a skeletal structure for an artificial cartilaginous tissue formed by alternately stacking a layer in which fibrous structural bodies using a bioabsorbable material are longitudinally arranged and a layer in which fibrous structural bodies are laterally arranged.

Assignees

• Univ Kinki
• Gunze Kk

Inventors

• Isogai Noritaka
• Teramura Takeshi
• Masutani Kazunari
• Mitachi Hiroshi
• Yotsuyanagi Takatoshi

Classifications

• A61L2430/14

  for ear reconstruction or ear implants, e.g. implantable hearing aids · CPC title

• A61L27/3817

  Cartilage-forming cells, e.g. pre-chondrocytes · CPC title

• A61F2/50

  Prostheses not implantable in the body {(closure means for urethra or rectum or for artificial body openings therefor A61F2/0004)} · CPC title

• A61F2210/0004

  bioabsorbable · CPC title

• A61F2250/0089

  coded with symbols, e.g. dots, numbers, letters, words · CPC title