WO2016007085A1 - Dispositifs d'alignement orthodontiques - Google Patents

Dispositifs d'alignement orthodontiques Download PDF

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Publication number
WO2016007085A1
WO2016007085A1 PCT/SG2014/000329 SG2014000329W WO2016007085A1 WO 2016007085 A1 WO2016007085 A1 WO 2016007085A1 SG 2014000329 W SG2014000329 W SG 2014000329W WO 2016007085 A1 WO2016007085 A1 WO 2016007085A1
Authority
WO
WIPO (PCT)
Prior art keywords
aligner
model
crown
teeth
tooth
Prior art date
Application number
PCT/SG2014/000329
Other languages
English (en)
Inventor
Fung Ki WONG
Original Assignee
Wisebrace Pte Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wisebrace Pte Ltd filed Critical Wisebrace Pte Ltd
Priority to SG11201610326VA priority Critical patent/SG11201610326VA/en
Priority to CN201480028667.0A priority patent/CN105407831A/zh
Priority to PCT/SG2014/000329 priority patent/WO2016007085A1/fr
Publication of WO2016007085A1 publication Critical patent/WO2016007085A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/08—Mouthpiece-type retainers or positioners, e.g. for both the lower and upper arch
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0006—Production methods
    • A61C13/0019—Production methods using three dimensional printing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0046—Data acquisition means or methods
    • A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam

Definitions

  • This invention relates to orthodontic aligners and, more particularly to a method for forming them.
  • Orthodontic aligners have been known for many years as a means for straightening misaligned teeth and other disorders of the dentition and the oral cavity associated with the teeth that can be treated by changing the positioning of a patient's teeth.
  • the first forms of orthodontic aligners were somewhat crude and clumsy devices created from wires, springs and adjustment screws that were inserted in the mouth of a patient and attached to the teeth to apply force to misaligned teeth or other parts of the dentition to correct their position in the mouth. They were most usually used to correct conditions such as over- or under-bite and other dental anomalies that interfered with the eating process.
  • orthodontic aligners are usually made from acrylic or other plastics materials so that they are less visible and more comfortable to wear.
  • Such retention methods include wire clasps attached to the aligner externally, for example by use of adhesives, or internally during the forming process, or attachment means cemented to the teeth. These methods are not totally reliable since the both require additional steps either in the manufacturing stage in the case of wire clasps or in the application stage for attachments means on the teeth. Further, wire clasps can be loosened or broken off and possibly swallowed by the patient.
  • a further alternative retention method that has been used form the aligner to extend over the gingival area so that retention is achieved by the aligner digging into gingival surface possibly causing pain to the patient and trauma to the soft tissue.
  • All orthodontic aligners need to be removed for adjustment as the treatment process proceeds and the position of the teeth changes and this must be done manually.
  • the prior methods of retention may make removal and insertion difficult for the patient.
  • This invention provides a novel form of orthodontic aligner that does not suffer from the problems associated with the prior art and a method for the manufacture of the new aligner.
  • an orthodontic aligner is formed by producing a 3-D virtual model of the dentition of a patient, modifying the virtual model by enlarging the crown or coronal portion of at least some of the posterior teeth, i.e. the molars and premolars, and depressing the area immediately gingival to the most prominent part of the crown, 3-D printing the modified virtual model to produce a physical model for the aligner and using the physical model for forming the aligner.
  • the virtual model of the patient's dentition may be made, for example, by intra-oral scanning, scanning of a dental impression or scanning a stone model.
  • the aligner itself is preferably made by vacuum forming a sheet of thermoplastics material, preferably a sheet of polyethylene terephthalate glycol modified or another co-polyester, or other colourless and transparent material, using the modified physical model.
  • the finished aligner will follow the modified contours of the posterior teeth and, when introduced onto the patient's dental arch, the enlarged coronal portion will allow movement of the posterior teeth to fit fully into the aligner with a space between the teeth and the aligner. This space allows unobstructed flow of blood within the periodontal tissue. This blood flow is vital for the health of the teeth and the satisfactory progress of the orthodontic treatment.
  • the depressed area allows the production of an in-turned lip on the inner surface of the aligner that allows the aligner to be a snap fit onto the posterior the teeth without coming into contact with or otherwise affecting the gums of the patient.
  • the amount of enlargement of the virtual image of the posterior teeth will depend on the size of the patient's teeth but may be as little as 0.2 mm.
  • the virtual image modification of the invention may be carried out one or more posterior teeth on each side of the oral cavity.
  • the teeth involved need not necessarily be the same teeth or the same number of teeth on each side.
  • Fig. 1 is a diagrammatic perspective view of the supra- gingival portion of a posterior tooth
  • Fig. 2 is a diagrammatic view showing the shape of the virtual model before modification
  • Fig. 3 is a diagrammatic view showing the shape of the virtual model after modification.
  • Fig.4 is a section through the posterior teeth portion of the modified aligner produced using a mould produced using a mould according to the invention.
  • the posterior teeth 1 of a human have an upper bulbous crown or corona 2 occupying approximately half of the part of the tooth exposed above the gingiva or gum 4 and a lower part 3 that tapers towards the root (not shown).
  • a 3-d virtual image of a patient's dentition is made. Only one tooth 1 is shown together with a portion of the gingiva 4.
  • the virtual image of the crown 2 is modified by slightly enlarging the boundary 5 of the image above the maximum dimension of the tooth indicated by line A-A and slightly depressing the boundary of the portion 3 below line A-A is to form an indentation 6.
  • the aligner of the invention has a first portion 7 which is larger than the crown 2 of the tooth 1 , a second portion comprising an in-turned lip 8 that is a clip-fit on the tooth below the crown 2 and a third portion 9 that fits over the top region of the gingival surface 4.

Abstract

L'invention concerne un dispositif d'alignement orthodontique qui est formé en produisant un modèle 3D virtuel de la dentition d'un patient, en modifiant le modèle virtuel par agrandissement de la couronne des dents postérieures de telle sorte que les dimensions de chaque dent sont légèrement agrandies, et par enfoncement de la zone immédiatement gingivale dans la partie la plus importante de la couronne, en imprimant en 3D le modèle virtuel modifié afin de produire un modèle physique pour le dispositif d'alignement, et en utilisant le modèle physique pour former le dispositif d'alignement.
PCT/SG2014/000329 2014-07-10 2014-07-10 Dispositifs d'alignement orthodontiques WO2016007085A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SG11201610326VA SG11201610326VA (en) 2014-07-10 2014-07-10 Orthodontic aligners
CN201480028667.0A CN105407831A (zh) 2014-07-10 2014-07-10 正畸矫正器
PCT/SG2014/000329 WO2016007085A1 (fr) 2014-07-10 2014-07-10 Dispositifs d'alignement orthodontiques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SG2014/000329 WO2016007085A1 (fr) 2014-07-10 2014-07-10 Dispositifs d'alignement orthodontiques

Publications (1)

Publication Number Publication Date
WO2016007085A1 true WO2016007085A1 (fr) 2016-01-14

Family

ID=55064572

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SG2014/000329 WO2016007085A1 (fr) 2014-07-10 2014-07-10 Dispositifs d'alignement orthodontiques

Country Status (3)

Country Link
CN (1) CN105407831A (fr)
SG (1) SG11201610326VA (fr)
WO (1) WO2016007085A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102244439B1 (ko) * 2020-12-10 2021-04-29 주식회사 그래피 교정력을 높인 투명 치아 교정 장치

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109567961B (zh) * 2019-01-22 2021-06-29 刘兮 一种隐形牙齿矫治器牙套模型及其使用方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6309215B1 (en) * 1997-06-20 2001-10-30 Align Technology Inc. Attachment devices and method for a dental applicance
US20040029068A1 (en) * 2001-04-13 2004-02-12 Orametrix, Inc. Method and system for integrated orthodontic treatment planning using unified workstation
WO2006050452A2 (fr) * 2004-11-02 2006-05-11 Align Technology, Inc. Procedes et appareil pour la fabrication d'aligneurs dentaires
US20080182220A1 (en) * 1997-06-20 2008-07-31 Align Technology, Inc. Computer automated development of an orthodontic treatment plan and appliance
US7831322B2 (en) * 2005-03-07 2010-11-09 Align Technology, Inc. Producing wrinkled dental aligner for dental treatment
US7942672B2 (en) * 2008-02-15 2011-05-17 Align Technology, Inc. Gingiva modeling

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102499767B (zh) * 2011-11-01 2013-08-28 西安交通大学口腔医院 一种真空成型改良式Activator矫治器及其制作方法
CN203369975U (zh) * 2013-07-12 2014-01-01 无锡时代天使医疗器械科技有限公司 一种无托槽隐形牙齿矫正器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6309215B1 (en) * 1997-06-20 2001-10-30 Align Technology Inc. Attachment devices and method for a dental applicance
US20080182220A1 (en) * 1997-06-20 2008-07-31 Align Technology, Inc. Computer automated development of an orthodontic treatment plan and appliance
US20040029068A1 (en) * 2001-04-13 2004-02-12 Orametrix, Inc. Method and system for integrated orthodontic treatment planning using unified workstation
WO2006050452A2 (fr) * 2004-11-02 2006-05-11 Align Technology, Inc. Procedes et appareil pour la fabrication d'aligneurs dentaires
US7831322B2 (en) * 2005-03-07 2010-11-09 Align Technology, Inc. Producing wrinkled dental aligner for dental treatment
US7942672B2 (en) * 2008-02-15 2011-05-17 Align Technology, Inc. Gingiva modeling

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102244439B1 (ko) * 2020-12-10 2021-04-29 주식회사 그래피 교정력을 높인 투명 치아 교정 장치
WO2022124509A1 (fr) * 2020-12-10 2022-06-16 주식회사 그래피 Appareil orthodontique transparent ayant une meilleure aptitude à la correction

Also Published As

Publication number Publication date
SG11201610326VA (en) 2017-01-27
CN105407831A (zh) 2016-03-16

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