Artificial scalp model production method using 3D printing-based multi-point multi-nozzles and artificial scalp model created by using same

Patent metadata

Field	Value
Publication number	US-12583172-B2
Application number	US-202318834811-A
Country	US
Kind code	B2
Filing date	Jan 4, 2023
Priority date	Mar 2, 2022
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

The present invention relates to a method for producing an artificial scalp model using a 3D printing-based multi-point multi-nozzles, and an artificial scalp model manufactured by using same, in which a dermal mimetic body can be created by using a plurality of nozzle arrays, a pore mimic structure can be generated, and hair follicle spheroids can then be created by 3D printing. In the method for producing an artificial scalp model using a 3D printing-based multi-point multi-nozzles and the artificial scalp model manufactured by using same, according to the present invention, by mimicking the hair of a healthy scalp, a plurality of arrayed hair follicle cells can be generated by 3D printing, and by using this, the effect of maximizing the treatment effect of scarring alopecia is obtained.

First claim

The invention claimed is:

1 . An artificial scalp model production method using 3D printing-based multi-point multi-nozzles, the method comprising:
preparing a first bio-ink containing a dermal fibroblast; forming dermal mimetics having a predetermined volume by using the first bio-ink; preparing a second bio-ink containing hair follicle cells; inserting at least one nozzle into the dermal mimetics to print the second bio-ink; crosslinking the dermal mimetics in the state that the at least one nozzle is inserted in the dermal mimetics; forming at least one spheroid by extruding the second bio-ink through the at least one nozzle; and removing the nozzle by retreating the nozzle so that a space where the nozzle was located in the crosslinked dermal mimetics can serve as a pore mimicking structure.

2 . The method of claim 1 , further comprising, before the forming the spheroid, retreating the at least one nozzle a predetermined distance to secure a printing space for the spheroid.

3 . The method of claim 2 , wherein, in the crosslinking the dermal mimetics, the pore mimicking structure retains even after the at least one nozzle is removed from the dermal mimetics.

4 . The method of claim 2 , wherein the forming the spheroid comprises extruding the second bio-ink to a lower end of the pore mimicking structure.

5 . The method of claim 4 , wherein the advancing the at least one nozzle into the dermal mimetics is performed by moving a head, on which the multiple nozzles are arrayed, along an extending direction of the nozzle.

6 . The method of claim 5 , wherein the forming the spheroid is performed by simultaneously extruding the second bio-ink from an array of the multiple nozzles at least partially inserted into the dermal mimetics.

7 . The method of claim 6 , wherein the removing the nozzle is performed by retreating the nozzle along the extending direction of the nozzle.

8 . The method of claim 2 , wherein the first bio-ink contains a component that has photocurable crosslinking properties.

9 . The method of claim 8 , wherein the crosslinking the dermal mimetics comprises irradiating light to crosslink the first bio-ink.

10 . The method of claim 2 , wherein the first bio-ink contains a component that has thermosetting crosslinking properties.

11 . The method of claim 3 , wherein the nozzle has an outer diameter of 150 to 700 μm.

Assignees

• Postech Res & Business Dev Found
• Pusan National Univ Industry—Univ Cooperation Foundation
• Nat Univ Pusan Ind Univ Coop Found

Inventors

• Cho Dong-Woo
• Kim Byoung Soo
• Cho Won-Woo
• Ahn Min Jun

Classifications

• B29L2031/7532

  Artificial members, protheses · CPC title

• B29C64/209

  Heads; Nozzles · CPC title

• B29C64/264

  Arrangements for irradiation · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title