WO2005094715A1 - Appareil orthodontique a revetement - Google Patents

Appareil orthodontique a revetement Download PDF

Info

Publication number
WO2005094715A1
WO2005094715A1 PCT/SE2004/000524 SE2004000524W WO2005094715A1 WO 2005094715 A1 WO2005094715 A1 WO 2005094715A1 SE 2004000524 W SE2004000524 W SE 2004000524W WO 2005094715 A1 WO2005094715 A1 WO 2005094715A1
Authority
WO
WIPO (PCT)
Prior art keywords
bracket
coating
orthodontic
orthodontic bracket
bracket body
Prior art date
Application number
PCT/SE2004/000524
Other languages
English (en)
Inventor
Göran STEEN
Original Assignee
Gestenco International Ab
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 Gestenco International Ab filed Critical Gestenco International Ab
Priority to PCT/SE2004/000524 priority Critical patent/WO2005094715A1/fr
Publication of WO2005094715A1 publication Critical patent/WO2005094715A1/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
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/28—Securing arch wire to bracket
    • A61C7/285—Locking by rotation
    • 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

Definitions

  • the invention pertains to an improved orthodontic bracket having a bracket body of plastic material and having a first surface that is an attachment surface for attaching said bracket to a tooth and a second surface that is an engagement surface adapted to cooperate with an orthodontic appliance such as an archwire.
  • Orthodontic appliances such as brackets have been made from a number of different materials.
  • properties of the chosen material are such as to provide an optimum combination of strength and durability of the material, bondability to teeth, resiliency, brittleness, cost, aesthetic qualities, structural stability and ease of manufacture and maintenance.
  • Orthodontic brackets have historically been manufactured from various types of metals. Metal brackets exhibit excellent strength characteristics, but are expensive and complicated to manufacture. Further, they are generally perceived as less aesthetically acceptable than modern brackets made from plastic materials or ceramics.
  • plastic brackets can be made transparent or can be made to closely match the colour of the teeth.
  • plastic brackets are biocompatible, resilient and non-abrasive and are less likely to cause damage to the teeth than harder materials such as ceramics and metal.
  • plastic brackets are comparatively inexpensive to manufacture and offer the possibility of making complicated structures with simple production methods.
  • the plastic materials are soft and deformable and exhibit poor durability.
  • plastic brackets are subject to aging and discolouration.
  • plastic brackets are less suitable for use in long-term treatment or for treatment requiring a material that can withstand high mechanical tension.
  • Ceramic brackets are less subjected to staining and have a better-lasting aesthetic appearance than plastic brackets.
  • ceramics are strong and more durable than plastics.
  • ceramic materials are brittle and hard and may cause damage when in contact with teeth or when removed from the teeth.
  • ceramic brackets have drawbacks with regard to their bonding properties and abrasiveness in contact with teeth and dental appliances such as archwires.
  • an orthodontic bracket having a bracket body of plastic material and having a first surface that is an attachment surface for attaching said bracket to a tooth and a second surface adapted to cooperate with an orthodontic appliance such as an archwire.
  • the bracket according to the invention is primarily distinguished in that the engagement surface has a coating comprising a ceramic material and in that said coating has a thickness of from 0.05 to 10.0 ⁇ m, preferably from 0.5 to 8.0 ⁇ m and most preferably from 1.0 to 5.0 ⁇ m.
  • the extremely thin coating in accordance with the invention gives the bracket surprisingly high strength, durability and resistance to staining and discolouration without substantially negatively affecting the bondability and resilience of the plastic bracket body. Moreover, the contact surface between the orthodontic bracket and an orthodontic appliance shows considerably lower friction than has previously been possible to achieve, particularly for ceramic brackets.
  • One problem encountered in tooth correction treatment is that when using orthodontic brackets cooperating with an archwire, the slot in the bracket accommodating the archwire exerts high friction on the archwire.
  • the risk of damaging or breaking the archwire is greatly reduced due to the low friction between the bracket and the archwire.
  • the orthodontic bracket in accordance with the invention combines the advantages of a plastic bracket with the advantages of a ceramic bracket.
  • the coating preferably comprises a ceramic material such as aluminum oxide, silica, aluminum hydroxide, wollastonite, spinel, titanium oxide, magnesioum oxide, zirconium oxide and mixtures thereof.
  • a ceramic material such as aluminum oxide, silica, aluminum hydroxide, wollastonite, spinel, titanium oxide, magnesioum oxide, zirconium oxide and mixtures thereof.
  • the coating is preferably made by a Physical Vapour Deposition (PVD) technique.
  • PVD is the common name of a family of coating methods including sputtering and evaporation. These coating methods offer a way of producing thin, strong, even and smooth coatings.
  • the coating can be applied in a uniform layer of uniform thickness. Alternatively, the coating can be applied only to selected parts of the orthodontic bracket and/or with different thickness in different areas of the coating. It may be desirable to provide parts of the bracket that are exposed to more severe wear conditions with a thicker layer of coating material than other, less exposed parts of the bracket. By selectively coating critical parts of the bracket with a thicker layer of inorganic or ceramic polymer coating, optimum strength can be achieved in those parts while maintaining high resiliency and low brittleness in the remaining part of the bracket.
  • the bracket body is preferably made from a plastic material such as polycarbonate, polysulphone, polyetherketone (PEEK), polyethylene terephthalate (PETG), polyacrylates and mixtures thereof.
  • the bracket body may contain reinforcement material such as glass fibres and ceramic and/or inorganic fillers preferably in an amount of 10-20 % by weight of the bracket body.
  • the coating offers a possibility of adjusting the colour of the brackets to match the colour of the wearer's teeth.
  • Fig. 1 shows a top view of an orthodontic bracket according to a first embodiment of the invention
  • Fig. 2 shows the orthodontic bracket in Fig. 1 with an applied archwire
  • Fig. 3 shows a cross-section through the orthodontic bracket in Fig. 1 taken along the line Ill-Ill, and
  • Fig. 4 shows an orthodontic bracket according to a second embodiment of the invention.
  • the orthodontic bracket 1 shown in Figs. 1 -3 has a bracket body 2 with a slightly curved attachment surface 3 adapted for attachment to a tooth and an engagement surface 4 for engagement with an archwire 5.
  • the engagement surface 4 is provided with four wings or hooks 6, 7, 8, 9, arranged in opposing pairs on each side of a central groove or slot 10. The wings are arranged to cooperate with locking loops 11 (only one shown in Fig. 1 ) to lock the archwire 4 in a central groove 10 on the engagement surface 4.
  • the bracket body is preferably made of a polymer matrix chosen from high- strength polymers such as polycarbonate, polysulphone, polyetherketone (PEEK), polyethylene terephthalate (PETG), polyacrylates and mixtures thereof.
  • a preferred material for the bracket body is polyethylene terephthalate/polycarbonate containing reinforcing glass fibres.
  • the bracket body 1 has a thin coating 13 in the comprising a ceramic material chosen among aluminum oxide (AI 2 O 3 ), silica, aluminum hydroxide, wollastonite, spinel, titanium oxide, magnesioum oxide, zirconium oxide and mixtures thereof.
  • the coating 13 has a thickness of from 0.1 to 10.0 ⁇ m, preferably from 0.5 to 8.0 ⁇ m and most preferably from 1.0 to 5.0 ⁇ m. Such coatings are preferably applied by means of a Physical Vapour Deposition (PVD) method.
  • PVD Physical Vapour Deposition
  • the coating 13 improves the hardness, durability and wear resistance of the bracket and shows surprisingly low friction against the materials commonly used in orthodontic appliances. Moreover, the coating protects the bracket against staining and aging due to the chemical influence from tobacco and ingested food-stuffs and drinks.
  • the coating 13 covers only the engagement surface 4, leaving the attachment surface 3 free of coating material. In this manner, the coating 13 does not affect the bonding characteristics of the plastic material in the bracket body 1.
  • the very thin coating 13 increases the strength of the bracket body 2, it does not severely affect the resiliency of the bracket body 2.
  • the coated bracket maintains a high degree of resiliency while exhibiting many of the advantages of a ceramic bracket.
  • the bracket is strong and durable, it is less likely to cause trauma to the teeth for instance when the patient happens to bite on the bracket.
  • the coated plastic bracket in accordance with the invention is less abrasive and can be manufactured more easily and at a lower cost than a corresponding ceramic bracket.
  • the bracket 1 can have a substantially uniform coating 13 with a uniform thickness.
  • the thickness of the coating may differ between different parts of the coating 13. It may, for instance, be advantageous to apply a coating 13 of a somewhat greater thickness to those areas of the bracket that are most subjected to abrasive forces.
  • the central channel 10 and/or the parts of the wings 6-8 engaging with the locking loop 11 may have a coating of greater thickness than the remaining parts of the engagement surface 3.
  • the coating 13 preferably has a thickness of from 5.0 to 10.0 ⁇ m while in parts of the engagement surface where basically only stain resistance and a somewhat higher rigidity is needed, the coating 13 preferably has a thickness of from 0.05 to 5.0 ⁇ m.
  • the bracket 1 shown in Fig. 4 is of a different type from that shown in Figs. 1- 3.
  • the bracket 1 has bracket body 2 with a slightly curved attachment surface 3, and an engagement surface 4 having a groove 10 for an archwire (not shown in Fig. 4).
  • the archwire is fastened to the bracket 1 by means of a locking clasp 14 which is movable around a hinge 15 placed on one side of the groove 10 and is arranged to cooperate with locking members 17 located on the opposite side of the groove.
  • the bracket 1 in Fig. 4 has a thin coating 13 of the same kind as the coating 13 shown in Figs. 1 -3.
  • the coating 13 can be of uniform thickness or can have a greater thickness in those areas of the brackets that will be most exposed to wear.
  • the surface of the groove 10 and the parts of the locking clasp 14 that will be in contact with the archwire when the bracket is mounted on a tooth can have a thicker coating than the outwardly facing parts of the engagement surface 4.

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

Un appareil orthodontique comprend un corps (2) fait en matière plastique et possédant une première surface qui est une surface de fixation (3), destinée à la fixation dudit appareil à la dent, et une deuxième surface qui est une surface d'accrochage (4) conçue pour coopérer avec un appareil orthodontique tel qu'un arc dentaire (5). La surface d'engagement possède un revêtement (13) comprenant un matériau céramique; ce revêtement a une épaisseur entre 0,05 et 10,0 µm, de préférence entre 0,5 et 8,0 µm et, si possible, entre 1,0 et 5,0 µm.
PCT/SE2004/000524 2004-04-02 2004-04-02 Appareil orthodontique a revetement WO2005094715A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SE2004/000524 WO2005094715A1 (fr) 2004-04-02 2004-04-02 Appareil orthodontique a revetement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE2004/000524 WO2005094715A1 (fr) 2004-04-02 2004-04-02 Appareil orthodontique a revetement

Publications (1)

Publication Number Publication Date
WO2005094715A1 true WO2005094715A1 (fr) 2005-10-13

Family

ID=35063471

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2004/000524 WO2005094715A1 (fr) 2004-04-02 2004-04-02 Appareil orthodontique a revetement

Country Status (1)

Country Link
WO (1) WO2005094715A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1813222A1 (fr) * 2006-01-25 2007-08-01 Dentaurum J.P. Winkelstroeter Kg Bague orthodontique avec système de rétention d'arc incorporé
WO2007135477A1 (fr) * 2006-05-23 2007-11-29 Diego Fernando Tatis Giraldo Verrou orthodontique et pince à autoverrouillage et à faible friction
JP2009519762A (ja) * 2005-12-14 2009-05-21 スリーエム イノベイティブ プロパティズ カンパニー 窒化ケイ素コーティングされた歯科矯正用物品
AU2009238317B2 (en) * 2008-11-14 2011-10-06 Ormco Corporation Surface treated polycrystalline ceramic orthodontic bracket and method of making same
WO2012030565A1 (fr) 2010-08-30 2012-03-08 3M Innovative Properties Company Articles dentaires enduits et procédés de fabrication associés
US8251696B2 (en) 2008-08-13 2012-08-28 Ormco Corporation Aesthetic orthodontic bracket and method of making same
CN105441875A (zh) * 2015-11-20 2016-03-30 镇江市口腔医院 表面低摩擦力耐蚀口腔正畸弓丝及其制备方法
WO2017013292A1 (fr) * 2015-07-17 2017-01-26 Institut Catala D'especialitats Odontologiques, S.L. Élément ou ajout d'ancrage orthodontique perfectionné
WO2018127614A3 (fr) * 2017-01-05 2018-10-11 Zamuy Invest, Sl Appareillage odontologique amélioré

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04176453A (ja) * 1990-11-12 1992-06-24 Norimichi Kawamura 審美性ブラケット及び審美性アーチワイヤー
JPH0515547A (ja) * 1991-07-05 1993-01-26 Tomy Kk 口腔外科用ブラケツト
EP0585138A1 (fr) * 1992-08-28 1994-03-02 A Company Orthodontics Bracket orthodontique en métal avec revêtement partiel en porcelaine fondue
US5429499A (en) * 1991-10-26 1995-07-04 Dentaurum J.P. Winkelstroeter Kg Orthodontic aid
US5816801A (en) * 1996-10-02 1998-10-06 Ormco Corporation Insert for reinforcing an orthodontic appliance and method of making same
US6267590B1 (en) * 1999-11-24 2001-07-31 Agion Technologies, Llc Antimicrobial dental products

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04176453A (ja) * 1990-11-12 1992-06-24 Norimichi Kawamura 審美性ブラケット及び審美性アーチワイヤー
JPH0515547A (ja) * 1991-07-05 1993-01-26 Tomy Kk 口腔外科用ブラケツト
US5429499A (en) * 1991-10-26 1995-07-04 Dentaurum J.P. Winkelstroeter Kg Orthodontic aid
EP0585138A1 (fr) * 1992-08-28 1994-03-02 A Company Orthodontics Bracket orthodontique en métal avec revêtement partiel en porcelaine fondue
US5816801A (en) * 1996-10-02 1998-10-06 Ormco Corporation Insert for reinforcing an orthodontic appliance and method of making same
US6267590B1 (en) * 1999-11-24 2001-07-31 Agion Technologies, Llc Antimicrobial dental products

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 199309, Derwent World Patents Index; Class A96, AN 1993-070218, XP002903839 *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 485 (C - 0993) 8 October 1992 (1992-10-08) *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009519762A (ja) * 2005-12-14 2009-05-21 スリーエム イノベイティブ プロパティズ カンパニー 窒化ケイ素コーティングされた歯科矯正用物品
EP1813222A1 (fr) * 2006-01-25 2007-08-01 Dentaurum J.P. Winkelstroeter Kg Bague orthodontique avec système de rétention d'arc incorporé
WO2007135477A1 (fr) * 2006-05-23 2007-11-29 Diego Fernando Tatis Giraldo Verrou orthodontique et pince à autoverrouillage et à faible friction
US8251696B2 (en) 2008-08-13 2012-08-28 Ormco Corporation Aesthetic orthodontic bracket and method of making same
AU2009238317B2 (en) * 2008-11-14 2011-10-06 Ormco Corporation Surface treated polycrystalline ceramic orthodontic bracket and method of making same
US9717569B2 (en) 2008-11-14 2017-08-01 Ormco Corporation Surface treated polycrystalline ceramic orthodontic bracket and method of making same
WO2012030565A1 (fr) 2010-08-30 2012-03-08 3M Innovative Properties Company Articles dentaires enduits et procédés de fabrication associés
US9539182B2 (en) 2010-08-30 2017-01-10 Geoffrey P. Morris Coated dental articles and related methods of manufacture
US9943467B2 (en) 2010-08-30 2018-04-17 3M Innovative Properties Company Coated dental articles and related methods of manufacture
WO2017013292A1 (fr) * 2015-07-17 2017-01-26 Institut Catala D'especialitats Odontologiques, S.L. Élément ou ajout d'ancrage orthodontique perfectionné
CN105441875A (zh) * 2015-11-20 2016-03-30 镇江市口腔医院 表面低摩擦力耐蚀口腔正畸弓丝及其制备方法
WO2018127614A3 (fr) * 2017-01-05 2018-10-11 Zamuy Invest, Sl Appareillage odontologique amélioré

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