Denture, reference denture, and denture manufacturing method

Patent metadata

Field	Value
Publication number	US-2022142757-A1
Application number	US-202017440218-A
Country	US
Kind code	A1
Filing date	Mar 4, 2020
Priority date	Mar 28, 2019
Publication date	May 12, 2022
Grant date	—

Abstract

A denture including a denture base where artificial teeth are fixed, the denture base includes a reference denture base member to which the artificial teeth are fixed and an adjusting member formed of a cured body of a curable denture base material, the adjusting member being joined to the reference denture base member, the adjusting member includes an anterior adjusting member that is joined to a mucosal surface of a base anterior region to form an anterior region together with the base anterior region, and a posterior adjusting member that is joined to a mucosal surface of a base posterior region to form a posterior region together with the base posterior region, and at least parts of base edge side distal end regions in the anterior region and the posterior region are formed of the anterior adjusting member and the posterior adjusting member, respectively.

First claim

1 . A denture including a denture base where artificial teeth are fixed, wherein,
the denture base includes a reference denture base member to which the artificial teeth are fixed and an adjusting member formed of a cured body of a curable denture base material, the adjusting member being joined to the reference denture base member, wherein, in a state in which the denture is worn in an oral cavity of a patient, when, in the denture, a direction on a labial side is defined as an “anterior side”, a direction on a throat side is defined as a “posterior side”, and a side facing an alveolar ridge mucosa in the oral cavity of the patient is defined as a “mucosal side”, and when, in the denture base and the reference denture base member, a surface on the mucosal side is defined as a “mucosal surface”, a surface on an opposite side to the mucosal surface is defined as a “polished surface”, and a boundary between the mucosal surface and the polished surface is defined as a “denture border”, the denture base includes a central region having the mucosal surface covering a mucosa of an alveolar crest region in the oral cavity of the patient, an anterior region having the mucosal surface covering a mucosa in the oral cavity of the patient anterior to the alveolar crest region, and a posterior region having the mucosal surface covering a mucosa in the oral cavity of the patient posterior to the alveolar crest region, the reference denture base member includes a base central region, a base anterior region, and a base posterior region, the adjusting member includes a central adjusting member that is joined to the mucosal surface of the base central region to form the central region together with the base central region, an anterior adjusting member that is joined to the mucosal surface of the base anterior region to form the anterior region together with the base anterior region, and a posterior adjusting member that is joined to the mucosal surface of the base posterior region to form the posterior region together with the base posterior region, and at least parts of denture border side distal end regions in the anterior region and the posterior region are formed of the anterior adjusting member and the posterior adjusting member, respectively.

2 . The denture according to claim 1 , wherein 80% or more of the denture border side distal end region of the denture border in the anterior region is formed of the anterior adjusting member, and 80% or more of the denture border side distal end region of the denture border in the posterior region is formed of the posterior adjusting member.

3 . The denture according to claim 2 ,
wherein a shape of the adjusting member is adjusted in conformity with a shape of the oral cavity of the patient, and wherein, through adjustment of the shape, in a state in which the denture is worn in the oral cavity of an individual patient to be a wearer, the adjusting member forms an occlusal surface on which teeth of an upper jaw and a lower jaw (here, the teeth are artificial teeth fixed to the denture, and natural teeth when the patient has the natural teeth) are brought into close contact with each other and which is a curved surface that is allowed to be approximated with a plane.

4 . The denture according to claim 1 ,
wherein, when at least one of the artificial teeth is defined as an essential artificial tooth, the essential artificial tooth is selected from the group consisting of a first premolar, a second premolar, a first molar, and a canine, and when a boundary portion of the anterior polished surface of the denture base with the artificial tooth is defined as a “cervical line”, a portion forming a wing-like form from the cervical line to the denture border is defined as a “flange”, and a portion on an anterior side of the flange having the cervical line of the essential artificial tooth as a proximal end and having the denture border on an extension of the cervical line as a distal end is defined as an “essential artificial tooth anterior flange portion”, a denture border portion of the essential artificial tooth anterior flange portion in the at least one essential artificial tooth among one or a plurality of the essential artificial teeth is formed of the anterior adjusting member, and 5% or more and 65% or less of the polished surface of the essential artificial tooth anterior flange portion is formed of the anterior adjusting member.

5 . The denture according to claim 4 ,
wherein the denture is a maxillary denture, wherein the essential artificial teeth include a canine artificial tooth (artificial canine), wherein the denture base is a maxillary denture base including a “palatal plate portion” covering a palatal mucosa posterior to the alveolar crest region in the upper jaw of the patient as the posterior region, wherein the palatal plate portion includes a “palatal plate adjusting portion” formed of the posterior adjusting member, and wherein at least a part of the denture border of the essential artificial tooth anterior flange portion of the artificial canine is formed of the anterior adjusting member, and 10% or more and 65% or less of the polished surface of the essential artificial tooth anterior flange portion is formed of an exposed surface of the anterior adjusting member.

6 . The denture according to claim 4 ,
wherein the denture is a mandibular denture, wherein the essential artificial teeth include a canine artificial tooth (artificial canine), wherein the denture base is a mandibular denture base including a “lingual flange portion” covering a lingual alveolar ridge mucosa posterior to the alveolar crest region in the lower jaw of the patient as the posterior region, wherein the lingual flange portion includes a “lingual flange adjusting portion” formed of the posterior adjusting member, and wherein at least a part of the denture border of the essential artificial tooth anterior flange portion of the artificial canine is formed of the anterior adjusting member, and 5% or more and 60% or less of the polished surface of the essential artificial tooth anterior flange portion is formed of an exposed surface of the anterior adjusting member.

7 . A reference denture, which is to be used as a reference denture member including the reference denture base member and the artificial teeth in the denture of claim 1 .

8 . The reference denture according to claim 7 ,
wherein, when at least one of the artificial teeth is defined as an essential artificial tooth, the essential artificial tooth is selected from the group consisting of a first premolar, a second premolar, a first molar, and a canine, wherein the essential artificial teeth include a canine artificial tooth (artificial canine), and wherein, when the reference denture is placed on a plane assumed as an occlusal plane with the artificial teeth side facing downward, in a vertical cross-section cut on a surface along a normal direction with respect to the polished surface of the base anterior region, which is perpendicular to the plane and passes through a cusp tip of the artificial canine, the base anterior region on a lower side by 2 mm from a denture border side distal end of the base anterior region of the reference denture base has a width of 0.5 mm or more and 3 mm or less.

9 . The reference denture according to claim 8 ,
wherein the reference denture is a maxillary reference denture, and wherein in the vertical cross-section, the denture border side distal end of the base anterior region and the cusp tip of the artificial canine have a height difference of 13 mm or more and 20 mm or less.

10 . The reference denture according to claim 8 ,
wherein the reference denture is a maxillary reference de

Assignees

• Tokuyama Dental Corp

Inventors

• TOYODA Mana
• Gyakushi Ayumu
• Yamazaki Tatsuya

Classifications

• A61C13/0025

  Linings · CPC title

• A61C13/0024

  Repairing or adjusting dentures; Location of irritating zones · CPC title

• A61C11/02

  characterised by the arrangement, location or type of the hinge means {; Articulators with pivots} · CPC title

• A61C13/10

  Fastening of artificial teeth to denture palates or the like {(A61C8/0048 takes precedence)} · CPC title

• A61C13/01 Primary

  Palates or other bases or supports for the artificial teeth; Making same · CPC title