EP1753363A1 - Brackets - Google Patents

Brackets

Info

Publication number
EP1753363A1
EP1753363A1 EP04739786A EP04739786A EP1753363A1 EP 1753363 A1 EP1753363 A1 EP 1753363A1 EP 04739786 A EP04739786 A EP 04739786A EP 04739786 A EP04739786 A EP 04739786A EP 1753363 A1 EP1753363 A1 EP 1753363A1
Authority
EP
European Patent Office
Prior art keywords
bracket
tooth
brackets
base
slot
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP04739786A
Other languages
German (de)
English (en)
Inventor
Clemens Fricke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1753363A1 publication Critical patent/EP1753363A1/fr
Withdrawn legal-status Critical Current

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
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/14—Brackets; Fixing brackets to teeth
    • 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
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/14—Brackets; Fixing brackets to teeth
    • A61C7/145—Lingual brackets
    • 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
    • A61C7/002—Orthodontic computer assisted systems
    • 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
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/14—Brackets; Fixing brackets to teeth
    • A61C7/148—Brackets; Fixing brackets to teeth with occlusal or gingival archwire slot opening
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49567—Dental appliance making
    • Y10T29/49568—Orthodontic device making

Definitions

  • the invention relates to brackets for attachment to the inside or outside of a tooth with a slot for receiving a wire arch, the wire arch connecting the teeth via the brackets and exerting forces and torques in order to bring the teeth into an end position provided by the orthodontist, which is the ideal position if possible comes close.
  • fixed appliances In addition to removable braces, fixed appliances are used.
  • Such fixed orthodontic appliances usually include so-called brackets, which can be attached both buccally on the outside of the tooth and lingually on the inside of the tooth for the duration of the treatment. They are used to fix wire arches that exert corrective forces and torques on the teeth in order to ultimately bring them into their final position. The forces are based on elastic deformation. Ideally, this elastic deformation is eliminated when the teeth are in their end position, so that none other forces act on them.
  • the wire arch usually has a rectangular or round cross section, and runs through slots provided in the brackets, which are referred to as "slots". The cross section of the slots is matched to that of the wire arches provided for receiving, ie rectangular. Above that in the slots The use of such brackets as part of a fixed appliance plays an important role in adult treatment, which is becoming increasingly important.
  • brackets from the prior art are essentially rectangular and have a total of four projections, two of these projections being arranged opposite each other such that there is a gap between them through which the wire arch can run.
  • the two gaps between the described pairs of projections together form the slot. Accordingly, the slot in the patient's mouth is essentially horizontal.
  • additional means are therefore required.
  • these are elastic bands or wires that are attached to the projections mentioned.
  • brackets with various folding mechanisms for fixing the wire arches are also known.
  • the task is therefore to provide brackets and a method for producing the brackets according to the invention, in which the wearing comfort is significantly increased compared to brackets from the prior art and also a reliable definition in lingual technology the wire arches is possible.
  • the object is achieved according to the invention by a bracket for attachment to an inside or outside of the tooth with a slot for receiving a wire arch and a base lying against the inside or outside of the tooth, the slot being embedded in the base and extending essentially vertically in the oral cavity.
  • Essentially perpendicular means essentially perpendicular to the spatial axis, i. H. the slot runs almost parallel to the tooth surface.
  • the angle between the vertical spatial axis and the slot can be - 20 to + 20 °.
  • the wire arch running through the slots no longer has a tendency to slip out of the slots. Accordingly, the setting of the wire arch in the slots is less complex and requires only light elastic bands. The absence of additional fixing means also increases the wearing comfort.
  • the bracket according to the invention has an overall significantly rounder shape with fewer edges than a bracket from the prior art, since there is no need to form a total of four projections between which the slot runs. This improved shape is clearly noticeable to the patient, in particular when the bracket touches the tongue, so that the wearing comfort is increased.
  • the bracket according to the invention not only dispenses with the corners and edges that arise in conventional brackets due to the protruding projections, but advantageously also has a base with a rounded surface.
  • the base can have the shape of a drop covering the inner or outer tooth surface.
  • the base area of brackets from the prior art is essentially rectangular.
  • the base of the bracket according to the invention with a rounded surface encompasses large areas of the inside or outside of the tooth to which the brackets are attached, which not only increases the wearing comfort due to the rounding, but also additionally the adhesion of the bracket teeth improved.
  • the base covers a large part of the area (e.g. ⁇ 60%) of the inside or outside of the tooth. According to the invention, the risk of a bracket breaking out and the complications associated therewith are significantly reduced in comparison with the prior art, in which brackets only cover comparatively small areas of the tooth surface.
  • the slot is expediently embedded in the side of the bracket facing the crown, which in the case of a drop-shaped configuration is wider than the side facing the root. Sufficient space thus remains for the slot, without the adjacent areas of the bracket becoming too narrow for them to have sufficient resistance to the loads that occur. If the areas of the bracket adjacent to the slot and thus also to the wire arch used were too narrow, there would otherwise be a risk that the area of the bracket would break off due to the forces occurring and the wire arch would come loose.
  • the crown-side design of the slot in the bracket also has the advantage of easier accessibility for the treating orthodontist, which simplifies the insertion of the arch wire, which may have to be repeated in the course of an orthodontic treatment.
  • a slot on the side of the bracket facing the crown is also advantageous because, due to the leverage effect, higher torques can be exerted by the wire arch on the tooth connected to the bracket. Since the brackets according to the invention expediently cover large areas of the tooth surface, there is also a particularly large scope for the positioning of the slot, so that higher torques can be achieved than with conventional brackets with a small base area and a slot which is located in the middle of the bracket.
  • the brackets according to the invention have particular advantages in the so-called lingual technique, in which the brackets are attached lingually, ie on the tongue side to the inner surface of the tooth.
  • the lingual technique is particularly aesthetically advantageous because lingual brackets are not visible from the outside.
  • many people do this Patients viewed as a great advantage, since wearing orthodontic devices is far less socially accepted here than among adolescents. This often prevents adults from having the tooth position corrected from a medical point of view.
  • the bracket according to the invention is particularly suitable for the lingual technique, since lingually attached brackets are more exposed than the buccally attached brackets for contact with the tongue. Accordingly, the shape of the brackets is also “felt” more strongly with the tongue, so that the rounding of the brackets and thus the increase in comfort are particularly important here.
  • brackets It is intended to individually adapt the shape of the brackets and thus also the shape of the base to the teeth, so that the brackets can be clearly positioned on each tooth.
  • the latter are necessary because the bracket shape, in particular the base area, is standardized and is not adapted to the individual tooth shape of the patient, or because of the small area of the base, no clear positioning can be achieved in the usual bracket.
  • the position, the angle of inclination and the depth of the slots for each tooth should also be adapted individually, the course of the slots in the individual brackets and thus also the course of the through Slots laid archwire is adapted to the optimized shape of the dental arch after treatment.
  • the brackets according to the invention should also allow the best possible torque to be applied to the tooth connected to the bracket. Since in conventional brackets the slot is formed as a space between the projections on the bracket, which is located in the middle of the bracket, and the brackets have a standardized basic shape, the slot and thus the arch wire on the tooth cannot be fixed in any position be so that the effective lever arm u. May not be optimal is.
  • the individually adapted brackets according to the invention allow the surface of the base and the position of the slot to be selected so that an optimal torque is exerted on the tooth. With a large distance between the slot and thus also the wire arch that is laid through it from the jaw, the torque exerted is particularly high, for example.
  • the brackets according to the invention Since it is intended to adapt the brackets according to the invention individually to each individual tooth of the patient, it makes sense to mill the brackets under computer control, which naturally also requires the use of a millable material.
  • Zirconium oxide is particularly advantageous here as a ceramic material, since zirconium oxide is tooth-colored and accordingly inconspicuous. Such tooth-colored, inconspicuous brackets are desirable for many people for aesthetic reasons. Ceramic materials are already used in orthodontics, but mostly cast and not milled.
  • the brackets according to the invention can also be produced from a metallic material such as titanium or a plastic.
  • brackets can be obtained from a monomer bath, for example by polymerization, for example with the aid of radiation.
  • a ceramic mass (with hardenable plastic as a binder) can also be solidified in the desired shape by means of radiation.
  • the brackets according to the invention can have a hook starting from the base, which serves as a starting point for ligatures or additional elements for delivering forces and torques.
  • the hook in conjunction with a ligature attached to it can effect the retention of the wire arch in the slot.
  • the hook is advantageously also rounded.
  • the bracket can be provided with a bite plateau.
  • Bite plateau represents a flattening of the bracket on the crown side, the for contact with the corresponding teeth of the opposing jaw or with aids attached to these teeth.
  • the teeth of the opposing jaw exert a force on the bracket and thus also on the tooth connected to it, which in the long run is moved intrusively deeper into the jaw.
  • bite plateaus are particularly suitable for maxillary anterior teeth.
  • the individual brackets should be shaped in such a way that they already contain all the information needed to bring the teeth into the intended end position.
  • standardized brackets are usually used, which only have differences for the individual tooth types, but do not take into account the specific conditions of the tooth of each individual patient.
  • the retention of the wire arch and thus the forces and torques acting on the dental arches are therefore not optimized, but require constant control and, if necessary, correction by the orthodontist treating them.
  • the treatment becomes more complex because the orthodontist has to check the progress of the treatment at comparatively short intervals, and often also takes a long time overall.
  • a method for producing individualized brackets has already been disclosed in EP 0 667 753 B1, in which the anatomical shapes in the patient's mouth are measured and an ideal dental arch shape is derived, on the basis of which the shape of the brackets and the arch wire are determined.
  • the individual orthodontic appliance is then manufactured with the previously constructed configuration, in particular using a CNC machine-readable code to control the production system.
  • brackets are used with regard to the basic shape and, with the aid of the equipment, slots are milled into slotless standard brackets at the calculated angle and at the calculated depth.
  • the brackets produced in this way have the disadvantages already mentioned above from the prior art, in particular the moderate wearing comfort and the tendency of Wire arch to slip out of the slots, and moreover, due to their not completely individualized basis, they cannot be positioned on the tooth without a transmission aid.
  • the brackets according to the invention have a significantly different shape than those in the prior art mentioned and, moreover, should in particular also have an individualized base, so that positioning on the tooth without a transmission aid is possible.
  • the method for producing the brackets therefore advantageously has the following steps:
  • the shape of the dental arch is scanned before the treatment, which can be done both in the patient's mouth and using a model made from the dental arch.
  • a simulation of the treatment goal with regard to functional aspects of the stomatognathic system is carried out.
  • a computer with the software provided is used. Compared to the manual creation of a setup, however, more aspects can be taken into account in the simulation on the computer, which places the treatment on a broader scientific basis, while the conventional treatment is significantly more influenced by the experience of the orthodontist treating it.
  • the shape of the brackets and the wire arch is then calculated and determined using suitable software.
  • the forces and torques acting on the teeth are taken into account.
  • the data generated in this way are used for computer-controlled milling of the brackets.
  • the setup can also be manually prepared in a conventional manner before the setup thus created is scanned in order to obtain the data required to simulate the shape of the bracket and archwire generate and then carry out the computer-controlled milling of the brackets.
  • the further orthodontic treatment provides for the brackets according to the invention to be fastened to the inside or outside of the teeth using a conventional acid etching technique or also using a glass ionomer cement, light curing being carried out, and guiding the wire arch through the slots ,
  • the wire arch is defined in the individual slots by a ligature.
  • the rest of the treatment is classic orthodontic.
  • the corresponding software for carrying out a virtual setup and for simulating the optimal bracket and wire arch shape essentially corresponds to the software used for CAD and CAM processes. From the calculations, the computer generates a CNC machine-readable code to control the manufacturing system.
  • a laser is preferably used for scanning, but it is also possible to use ultrasound scanners, video imaging, mechanical scanning or other image generation apparatus.
  • the scanner, in particular the laser should be such that it can capture the structure of the teeth as precisely as possible, in particular undercuts etc. being important in order to adapt the shape of the base of the bracket as precisely as possible to the tooth surface for optimum positioning.
  • the simulation of the bracket shape also serves to determine the angles and depth of the slots embedded in the brackets. These slots are adapted to the optimal simulated shape of the dental arch after the treatment.
  • An orthodontic treatment based on the brackets produced according to the invention thus leads to the optimal dental arch shape in a much more targeted manner than was previously possible. This is all the more true since it is possible with the aid of the described method to individually determine the shape of the brackets for each individual tooth.
  • the invention is illustrated by the accompanying drawings.
  • Fig. 1 Shows a bracket according to the invention, which is attached to a tooth in a side view.
  • the bracket according to the invention which is provided with the reference number 1 in its entirety, is attached lingually to the inside of the tooth of tooth 2, which is an upper jaw front tooth.
  • the bracket 1 can be attached to a tooth 2 using a conventional acid etching technique.
  • the bracket 1 is composed of a base 3 and a hook 4 extending from the base 3, a slot 6 being inserted into the base 3 toward the crown 5.
  • the slot 6 serves to accommodate the wire arch and, like this, has a rectangular cross section.
  • the base 3 has an overall teardrop shape and is wider on the crown side than at the end facing the root. The base 3 tapers towards the root in cross-section.
  • the base 3 is wide enough in cross section to easily accommodate a slot 6 without the areas adjacent to the slot 6 becoming too fragile due to the small material cross section.
  • a hook 4 extends from the base of the base, so that an additional slot 7 is formed which serves to fix the ligature to secure the wire arch in slot 6.
  • the bracket 1 also has a flat on the side of the crown 5 of the tooth 2, which represents a bite plateau 8. This serves to make contact with the corresponding teeth of the opposing jaw or with aids attached to these teeth. In this way, a force arises in the direction of arrow 9, which in the long run intrusively moves tooth 2 deeper into the jaw.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

L'invention concerne un bracket (1) à fixer sur une face interne ou externe d'une dent. Le bracket (1) présente une base (3) qui est en contact avec la dent (2) et qui présente une fente (6) destinée à l'insertion d'un fil en arc. Cette fente (6) s'étend sensiblement verticalement dans la cavité buccale de telle façon que le fil en arc qui déploie ses forces et couples sensiblement horizontalement, est positionné de manière optimale dans la fente (6). Les brackets (1) selon l'invention sont globalement réalisés de manière nettement plus arrondie que les brackets selon l'état de la technique, ce qui améliore le confort pour le patient. Selon l'invention, la forme des brackets (1) est à adapter individuellement à chaque dent (2) d'un patient pour ainsi optimiser le mouvement du fil en arc dans sa position idéale et la fixation des brackets (1) à la dent (2).
EP04739786A 2004-06-11 2004-06-11 Brackets Withdrawn EP1753363A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2004/006286 WO2005120384A1 (fr) 2004-06-11 2004-06-11 Brackets

Publications (1)

Publication Number Publication Date
EP1753363A1 true EP1753363A1 (fr) 2007-02-21

Family

ID=34957882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04739786A Withdrawn EP1753363A1 (fr) 2004-06-11 2004-06-11 Brackets

Country Status (3)

Country Link
US (1) US20080138758A1 (fr)
EP (1) EP1753363A1 (fr)
WO (1) WO2005120384A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5530792B2 (ja) * 2009-04-27 2014-06-25 剛 亀田 歯列矯正用チューブ
JP5542516B2 (ja) * 2009-04-27 2014-07-09 剛 亀田 歯列矯正用ブラケット
DE102010049347B4 (de) * 2010-10-23 2019-07-04 Manfred Becht Bogen und System zur orthodontischen Behandlung
US10383709B2 (en) 2012-10-12 2019-08-20 Nobel Biocare Services Ag Dental bar
KR101350901B1 (ko) * 2013-10-07 2014-01-14 신수진 치아 교정용 브라켓
WO2015084102A1 (fr) * 2013-12-05 2015-06-11 (주) 스타덴텍코리아 Bracket de correction d'agencement de dent autofixant et ensemble de bracket
DE102016110161A1 (de) * 2016-06-02 2017-12-07 Yong-min Jo Bracket für eine kieferorthopädische Vorrichtung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5982013U (ja) * 1982-11-25 1984-06-02 藤田　欣也 歯科矯正装置
US5474444A (en) * 1988-09-26 1995-12-12 Wildman; Alexander J. Multiwire arch system
FR2778330B1 (fr) 1998-05-05 2000-11-17 Jean Jacques Aknin Appareil pour le traitement orthodontique
DE20009331U1 (de) 2000-05-24 2000-12-21 Weiss-Naumann, Helgard, 35037 Marburg Bracket
US6776614B2 (en) * 2002-02-13 2004-08-17 Lingualcare, Inc. Modular system for customized orthodontic appliances
DE10300010B4 (de) * 2003-01-02 2007-08-09 Fricke, Clemens, Dr. Brackets sowie ein Verfahren zu ihrer Herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005120384A1 *

Also Published As

Publication number Publication date
US20080138758A1 (en) 2008-06-12
WO2005120384A1 (fr) 2005-12-22

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