Unextracted tooth root canal filler and dental tissue regeneration method for unextracted tooth

a technology of unextracted tooth and root canal filler, which is applied in the direction of skeletal/connective tissue cells, teeth capping, prosthesis, etc., can solve the problems of increasing the risk of enlarged dental caries, requiring drastic improvement of dental caries treatment, and greatly increasing the possibility of tooth loss

Inactive Publication Date: 2012-06-28
NAT CENT FOR GERIATRICS & GERONTOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0043]According to the present disclosure, dental tissues can be regenerated in a tooth with a complete apical closure, causing neith

Problems solved by technology

At present, about a half of tooth loss is due to dental caries and tooth fractures, and it is known that removal of dental pulp greatly increases the possibility of tooth loss.
Thus, dental caries treatment requires drastic improvement.
When dental pulp is removed (pulpectomy), its potential of reparative dentin formation and defense mechanism against infecti

Method used

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  • Unextracted tooth root canal filler and dental tissue regeneration method for unextracted tooth
  • Unextracted tooth root canal filler and dental tissue regeneration method for unextracted tooth
  • Unextracted tooth root canal filler and dental tissue regeneration method for unextracted tooth

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first embodiment

[0124]Embodiments of the present disclosure will be specifically described hereinafter with reference to the drawings. An unextracted tooth root canal filler according to this embodiment includes dental pulp stem cells and an extracellular matrix, and is inserted in the apical part of an infected root canal of an unextracted tooth after pulpectomy or enlargement and cleaning of the root canal.

[0125]FIG. 1 is a view illustrating an unextracted tooth root canal filler 200 according to this embodiment. The unextracted tooth root canal filler 200 is formed by transplanting dental pulp stem cells 220 to an extracellular matrix 210. The dental pulp stem cells 220 are transplanted to the apical part of the root canal of the unextracted tooth root canal filler 200.

[0126]The dental pulp stem cells are dental pulp stem cells derived from a permanent tooth or a deciduous tooth. The dental pulp stem cells include at least one of dental pulp CXCR4-positive cells, SSEA-4-positive cells, FLK-1-pos...

second embodiment

[0148]FIGS. 4A and 4B are views illustrating an unextracted tooth root canal filler 200 according to a second embodiment of the present disclosure. As illustrated in FIG. 4A, in the unextracted tooth root canal filler 200, dental pulp stem cells 220 are transplanted to the apical part of the root canal, and a chemotactic factor 230 containing at least one of a cell chemotactic factor, a cell growth factor, a neurotrophic factor, or an angiogenic factor is transplanted to the tooth crown part of the root canal (e.g., ½ to ⅔ from the upper end of the root canal).

[0149]The reason why the dental pulp stem cells 220 are transplanted to the apical part of the root canal and the chemotactic factor 230 is transplanted to the tooth crown part of the root canal is as follows. Even after the dental pulp stem cells 220 are transplanted to the tooth crown part of the root canal, failures in supplying nutrition from tissues might occur to cause a necrosis. In addition, the dental pulp stem cells ...

third embodiment

[0160]In the unextracted tooth root canal filler 200 of the first embodiment, the dental pulp stem cells 220 are transplanted to the apical part of the root canal. However, the present disclosure is not limited to this example, and the dental pulp stem cells 220 may be uniformly mixed in the entire unextracted tooth root canal filler 200. In such an unextracted tooth root canal filler 200, dental tissues can be regenerated in a tooth with a complete apical closure, without internal resorption, external resorption and odontoclast differentiation in the regenerated tissues, and odontoblasts are aligned along the dentinal wall.

[0161]This unextracted tooth root canal filler 200 can be obtained by, for example, uniformly mixing dental pulp stem cells with a type I and III collagen mixture (e.g., collagen XYZ, Nitta Gelatin) without formation of bubbles.

[0162]In the unextracted tooth root canal filler 200 of the second embodiment described above, the dental pulp stem cells 220 are transpl...

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Abstract

Disclosed is a root canal filler for non-extracted tooth which causes no internal resorption or external resorption in a tooth with complete root formation, shows no odontoclast, and contributes to the regeneration of a dental tissue in which odontoblasts are smoothly aligned on the dentin wall. After pulpectomy or enlargement/cleaning of an infected root canal, a root canal filler for non-extracted tooth, which comprises tooth pulp stem cells and an extracellular matrix, is inserted into the apical side of the root canal of the non-extracted tooth. The tooth pulp stem cells may be, for example, dental pulp CXCR4-positive cells. It is preferred to attach, to the crown side of the root canal, migration factor(s) including at least one factor selected from among a cell migration factor, a cell proliferation factor, a neurotrophic factor and an angiogenic factor.

Description

TECHNICAL FIELD[0001]The present disclosure relates to unextracted tooth root canal fillers for filling root canals of unextracted teeth, and dental tissue regeneration methods for unextracted teeth using the unextracted tooth root canal fillers.BACKGROUND ART[0002]At present, about a half of tooth loss is due to dental caries and tooth fractures, and it is known that removal of dental pulp greatly increases the possibility of tooth loss.[0003]The average lifetime of teeth is said to be 57 years at present. To enable a person to chew with his / her own teeth throughout the lifetime, the lifetime of teeth needs to be prolonged by 20 years or more. Despite of “8020” Campaign (to keep 20 teeth or more until 80 years old), people now aged 80 keep about 8 teeth on average, and the number of remaining teeth of elderly people has hardly increased. Thus, dental caries treatment requires drastic improvement.[0004]When dental pulp is removed (pulpectomy), its potential of reparative dentin form...

Claims

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Application Information

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IPC IPC(8): A61C5/04A61K35/32A61L27/00A61L27/02A61L27/04A61L27/06A61L27/12A61L27/22A61L27/24A61L27/36A61L27/38A61L27/54
CPCA61L27/3633A61L27/3834A61L27/3865A61L2430/12C12N5/0664A61K38/193A61K35/28A61K35/32A61C5/04A61K2300/00A61C5/50A61P1/02A61P43/00
Inventor NAKASHIMA, MISAKOIOHARA, KOICHIRO
Owner NAT CENT FOR GERIATRICS & GERONTOLOGY
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