WO2007013116A1 - Procede permettant de produire des appareils orthodontiques et appareil orthodontique - Google Patents

Procede permettant de produire des appareils orthodontiques et appareil orthodontique Download PDF

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Publication number
WO2007013116A1
WO2007013116A1 PCT/IT2005/000631 IT2005000631W WO2007013116A1 WO 2007013116 A1 WO2007013116 A1 WO 2007013116A1 IT 2005000631 W IT2005000631 W IT 2005000631W WO 2007013116 A1 WO2007013116 A1 WO 2007013116A1
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WO
WIPO (PCT)
Prior art keywords
fact
orthodontic
film
parylene
microns
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.)
Ceased
Application number
PCT/IT2005/000631
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English (en)
Inventor
Maurizio Dolfi
Gabriele Scommegna
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.)
Leone SpA
Original Assignee
Leone SpA
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 Leone SpA filed Critical Leone SpA
Publication of WO2007013116A1 publication Critical patent/WO2007013116A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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
    • A61C7/30—Securing arch wire to bracket by resilient means; Dispensers therefor
    • A61C7/303—Elastic bands

Definitions

  • the present invention relates to a method for producing orthodontic appliances and an orthodontic appliance.
  • brackets are widely used in orthodontic techniques, the brackets being bonded to the vestibular surface of teeth in an arch that requires orthodontic treatment.
  • the brackets have slots accommodating a pre-shaped metal wire that passes through each slot.
  • each bracket is provided with a ligature device, commonly named "ligature”, that, in its simplest form, consists of a ring made from an elastic material such as polyurethane. Examples of orthodontic ligatures are described in US 5540586, EP 289334, ES 1042372 and EP 1169977. During orthodontic therapy, ligatures and other orthodontic components undergo changes in colour.
  • Figs. 1 - 5 show examples of orthodontic ligatures which can be treated adopting the method according to the present invention
  • FIG. 6A shows a simplified block diagram illustrating the operative steps of the method according to the present invention
  • - Fig. 6B is a chart of the chemical changes that take place during the process;
  • - Fig. 7 shows a set of polyurethane ligatures made by traditional techniques before being used;
  • - Fig. 8 shows the same set of ligatures as in Fig. 7, after being treated according to the present method and after being subjected to an empirical test involving immersion in coffee for 14 consecutive days;
  • Fig. 9 shows a set of polyurethane ligatures, untreated and not subjected to the same test.
  • a method according to the present invention may be applied, for example, to the manufacture of orthodontic devices such as elastic polyurethane ligatures of the type shown in Figs. 1 - 5.
  • Fig. 1 shows an orthodontic bracket (1) with a base (10) for bonding it to the vestibular surface of a tooth and a body (11) from which two wings (12) emerge.
  • the wings (12) delimit a slot (13) and offer a securing point for the ligature (2) .
  • the latter is of the type providing two rings intended to be secured to said wings and a central body (20) intended to be positioned above the slot (13) ;
  • ⁇ Fig. 2 shows a simple pre-curved ring ligature (2)
  • FIGS. 3 and 4 show further examples of (2) with a central body (20) ;
  • Fig. 5 shows another example of ligature (2) with two separate rings, a central body (20) and pre- shaped curves (21) resulting in correspondence of the points where the rings join the central body
  • the present method involves a step of moulding an orthodontic device, e.g. a polyurethane ligature, and a subsequent operative step during which the device is coated with a polymeric film that significantly reduces the colour degradation of the device during its actual use, i.e. when it is used for a predetermined period of time in the patient's mouth. Since moulding of orthodontic devices is a well-known technique, further details concerning the above- mentioned first operative step are not provided.
  • the documents listed above illustrate examples regarding the manufacturing of orthodontic devices to which the second step of the present method may be advantageously applied. Particularly satisfying results have been achieved by realizing a Parylene coating by means of plasma deposition on polyurethane ligatures.
  • the coating consists of a film that is particularly well-bonded to the substrate and that, despite its thinness (only a few microns) , prevents direct contact between the polyurethane substrate and oral liquids. Without this coating-, the polyurethane substrate would be subject to imbibition and a subsequent colour change from clear to dark would occur over relatively short time spans.
  • the said coating can be obtained as follows.
  • the di-monomer (diparaxylylene) in powder form at room temperature is brought up to 150 0 C at atmospheric pressure and vapourised.
  • a second step (B) the substance thus obtained is brought to 690 0 C under a depressurised atmosphere (half the pressure used in the previous step) and the monomer converts to gaseous form.
  • a second third step (C) the gas thus obtained is conducted to a vacuum coating chamber (pressure between 0.07 and 0.1 atm. ) at room temperature (23 0 C - 35°C) where the items to be coated are positioned.
  • the coating chamber can be of the fixed or slowly rotating type. During this step, the gas particles become solid without forming a liquid and the polymer adheres to the items positioned in the chamber.
  • any excess gas exits the coating chamber, is cooled and brought to its liquid form.
  • the film deposited on the substrate is particularly continuous, uniformly spread and perfectly takes up the geometry and shape of the substrate.
  • Parylene N with no chlorine atoms
  • Parylene C with one chlorine atom on the benzene ring
  • Parylene is known in the biomedical sector as it is used to lubricate human implant devices to reduce resistance to blood flow (see US patent US 5632771) . According to the present invention, the use of Parylene proved surprisingly effective in preventing, or at least drastically delaying, colour degradation in orthodontic appliances.
  • the above-mentioned procedure can also be applied with the same advantages to orthodontic brackets, especially the so-called aesthetic types, e.g. polycarbonate brackets.

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 procédé permettant de produire des appareils orthodontistes consistant à mouler un appareil orthodontique et à le recouvrir d'un film polymère. Ledit film permet de réduire significativement la dégradation de couleur de l'appareil pendant son utilisation, c'est-à-dire lorsqu'on l'utilise dans la bouche d'un patient pendant une durée prédéterminée.
PCT/IT2005/000631 2005-07-29 2005-11-03 Procede permettant de produire des appareils orthodontiques et appareil orthodontique Ceased WO2007013116A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITFI2005A000170 2005-07-29
ITFI20050170 ITFI20050170A1 (it) 2005-07-29 2005-07-29 Procedimento per la fabbricazione di dispositivi ortodontici e dispositivo ortodontico

Publications (1)

Publication Number Publication Date
WO2007013116A1 true WO2007013116A1 (fr) 2007-02-01

Family

ID=35968351

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2005/000631 Ceased WO2007013116A1 (fr) 2005-07-29 2005-11-03 Procede permettant de produire des appareils orthodontiques et appareil orthodontique

Country Status (2)

Country Link
IT (1) ITFI20050170A1 (fr)
WO (1) WO2007013116A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020065538A1 (fr) * 2018-09-26 2020-04-02 3M Innovative Properties Company Articles dentaires en parylène
CN110958862A (zh) * 2017-07-25 2020-04-03 3M创新有限公司 基于聚合物的耐水牙科制品

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0289334A2 (fr) 1987-04-30 1988-11-02 Tp Orthodontics, Inc. Dispositif d'orthodontie élastique pour une attache profilée
US5230619A (en) * 1992-06-02 1993-07-27 Ormco Corporation Orthodontic appliance with protective porous film
US5378146A (en) * 1990-02-07 1995-01-03 Ormco Corporation Polyurethane biomedical devices & method of making same
US5540586A (en) 1993-03-24 1996-07-30 Hanson; G. Herbert Elastomeric orthodontic ligatures
EP1169977A2 (fr) 2000-06-28 2002-01-09 Lee R. Logan Ligature orthodontique élastomérique courbée
US6442785B1 (en) * 1999-09-29 2002-09-03 Dane Q. Robinson Dental brush with enhanced bristles
WO2003051241A1 (fr) * 2001-12-19 2003-06-26 Centri Ab Revetement de prothese avec film de polymere
EP1501331A1 (fr) * 2002-04-17 2005-01-26 Matsushita Electric Industrial Co., Ltd. Sonde ultrasonore

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0289334A2 (fr) 1987-04-30 1988-11-02 Tp Orthodontics, Inc. Dispositif d'orthodontie élastique pour une attache profilée
US5378146A (en) * 1990-02-07 1995-01-03 Ormco Corporation Polyurethane biomedical devices & method of making same
US5230619A (en) * 1992-06-02 1993-07-27 Ormco Corporation Orthodontic appliance with protective porous film
US5540586A (en) 1993-03-24 1996-07-30 Hanson; G. Herbert Elastomeric orthodontic ligatures
US6442785B1 (en) * 1999-09-29 2002-09-03 Dane Q. Robinson Dental brush with enhanced bristles
EP1169977A2 (fr) 2000-06-28 2002-01-09 Lee R. Logan Ligature orthodontique élastomérique courbée
WO2003051241A1 (fr) * 2001-12-19 2003-06-26 Centri Ab Revetement de prothese avec film de polymere
EP1501331A1 (fr) * 2002-04-17 2005-01-26 Matsushita Electric Industrial Co., Ltd. Sonde ultrasonore

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110958862A (zh) * 2017-07-25 2020-04-03 3M创新有限公司 基于聚合物的耐水牙科制品
EP3658068A4 (fr) * 2017-07-25 2021-01-20 3M Innovative Properties Company Articles dentaires à base de polymère résistant à l'eau
AU2018307762B2 (en) * 2017-07-25 2021-10-07 3M Innovative Properties Company Water-resistant polymer-based dental articles
AU2018307762C1 (en) * 2017-07-25 2022-02-10 3M Innovative Properties Company Water-resistant polymer-based dental articles
CN110958862B (zh) * 2017-07-25 2022-08-16 3M创新有限公司 基于聚合物的耐水牙科制品
US11911236B2 (en) 2017-07-25 2024-02-27 3M Innovative Properties Company Water-resistant polymer-based dental articles
WO2020065538A1 (fr) * 2018-09-26 2020-04-02 3M Innovative Properties Company Articles dentaires en parylène
CN112789007A (zh) * 2018-09-26 2021-05-11 3M创新有限公司 聚对二甲苯牙科制品
JP2021529643A (ja) * 2018-09-26 2021-11-04 スリーエム イノベイティブ プロパティズ カンパニー パリレン歯科用物品
CN112789007B (zh) * 2018-09-26 2022-03-08 3M创新有限公司 聚对二甲苯牙科制品
US11291526B2 (en) 2018-09-26 2022-04-05 3M Innovative Properties Company Parylene dental articles
JP7056883B2 (ja) 2018-09-26 2022-04-19 スリーエム イノベイティブ プロパティズ カンパニー パリレン歯科用物品

Also Published As

Publication number Publication date
ITFI20050170A1 (it) 2007-01-30

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