Pulp regeneration compositions and methods of forming and using the same

Patent metadata

Field	Value
Publication number	US-12016938-B2
Application number	US-202217969990-A
Country	US
Kind code	B2
Filing date	Oct 20, 2022
Priority date	Dec 1, 2016
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

A dental tissue regenerative composition. The composition includes a combination of (1) human dental pulp stem cells and (2) at least one of human umbilical vein endothelial cells or vascular endothelial growth factor. The combination is encapsulated in a light-activated gelatin methacrylate hydrogel.

First claim

What is claimed is:

1. A three-dimensional biomimetic model comprising:
a tissue regenerative composition comprising
a material at least partly obtained from an extracted tooth, and
a light-activated hydrogel encapsulating the material;

a biomimetic enamel organ layer, and
a biomimetic pulp organ.

2. The three-dimensional biomimetic model of claim 1 , wherein the tissue regenerative composition a photo-initiator.

3. The three-dimensional biometric model of claim 2 , wherein the photo-initiator is present at a concentration of about 0.05% to about 0.5% (w/v).

4. The three-dimensional biometric model of claim 2 , wherein the photo-initiator is selected from the group consisting of: 1-[4-(2-hydroxy ethoxy)-phenyl]-2-hydroxy-2-methyl-1-propane-1-one, azobisisobutyronitrile, benzoyl peroxide, di-tert-butyl peroxide, 2,2-dimethoxy-2-phenylacetophenone, Eosin Y, and any combination thereof.

5. The three-dimensional biometric model of claim 1 , wherein the hydrogel is a gelatin methacrylate hydrogel.

6. The three-dimensional biometric model of claim 5 , wherein the gelatin methacrylate hydrogel is present at a concentration of about 3% to about 5% (w/v).

7. The three-dimensional biometric model of claim 1 , wherein the material obtained from the extracted tooth includes dental pulp stem cells.

8. The three-dimensional biometric model of claim 7 , wherein the material further includes at least one of umbilical vein endothelial cells or vascular endothelial growth factor.

9. The three-dimensional biometric model of claim 7 , wherein the dental pulp stem cells have been isolated from dental pulp.

10. The three-dimensional biometric model of claim 9 , wherein the dental pulp is from a mature tooth.

11. A method of forming a three-dimensional biometric model, the method comprising:
forming a biomimetic enamel organ layer from a first material at least partly obtained from an extracted tooth, the first material being encapsulated in a light-activated hydrogel; and
forming a biomimetic pulp organ from a second material at least partly obtained from an extracted tooth, the second material being encapsulated in the light-activated hydrogel.

12. The method of claim 11 , wherein the hydrogel is a gelatin methacrylate hydrogel.

13. The method of claim 12 , wherein the gelatin methacrylate hydrogel is present at a concentration of about 3% to about 5% (w/v).

14. The method of claim 11 , wherein at least one of the first and second materials obtained from the extracted tooth includes dental pulp stem cells.

15. The method of claim 14 , wherein at least one of the first and second materials further comprises at least one of umbilical vein endothelial cells or vascular endothelial growth factor.

16. The method of claim 14 , wherein the dental pulp stem cells have been isolated from dental pulp.

17. The method of claim 16 , wherein the dental pulp is from a mature tooth.

18. The three-dimensional biomimetic model of claim 1 , wherein the biomimetic enamel organ layer includes epithelial cells.

19. The three-dimensional biomimetic model of claim 1 , wherein the biomimetic pulp organ includes mesenchymal cells.

20. The method of claim 11 , wherein the first material includes epithelial cells.

21. The method of claim 11 , wherein the second material includes mesenchymal cells.

Assignees

• Tufts College
• Brigham & Womens Hospital Inc

Inventors

• Yelick Pamela C
• Khademhosseini Ali

Classifications

• A61K6/56

  Apical treatment · CPC title

• A61C5/40

  Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots · CPC title

• A61K6/69

  Medicaments · CPC title

• A61K6/62 Primary

  Photochemical radical initiators · CPC title

• A61L2430/12

  for dental implants or prostheses · CPC title