WO2010105059A1 - Bracket orthodontique pour molaire équipé d'une butée à pince à crochet - Google Patents

Bracket orthodontique pour molaire équipé d'une butée à pince à crochet Download PDF

Info

Publication number
WO2010105059A1
WO2010105059A1 PCT/US2010/026987 US2010026987W WO2010105059A1 WO 2010105059 A1 WO2010105059 A1 WO 2010105059A1 US 2010026987 W US2010026987 W US 2010026987W WO 2010105059 A1 WO2010105059 A1 WO 2010105059A1
Authority
WO
WIPO (PCT)
Prior art keywords
hook
stop
curved
plier
bracket
Prior art date
Application number
PCT/US2010/026987
Other languages
English (en)
Inventor
Paul E. Lewis
Dwight P. Schnaitter
Original Assignee
Ultradent Products, Inc.
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 Ultradent Products, Inc. filed Critical Ultradent Products, Inc.
Publication of WO2010105059A1 publication Critical patent/WO2010105059A1/fr

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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
    • 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
    • A61C7/02—Tools for manipulating or working with an orthodontic appliance
    • A61C7/04—Tools for manipulating or working with an orthodontic appliance plier-type, e.g. pincers

Definitions

  • the present invention relates to orthodontic brackets, particularly molar orthodontic brackets.
  • Orthodontics is a specialized field of dentistry that involves the application of mechanical forces to urge poorly positioned or crooked teeth into correct alignment and orientation. Orthodontic procedures can be used for cosmetic enhancement of teeth, as well as medically necessary movement of teeth to correct underbites or overbites. For example, orthodontic treatment can improve the patient's occlusion and/or enhanced spatial matching of corresponding teeth.
  • Orthodontic brackets are small slotted bodies configured for direct attachment to the patient's teeth or, alternatively, for attachment to bands which are, in turn, cemented or otherwise secured around the teeth.
  • a curved arch wire is inserted into the bracket slots.
  • the arch wire acts as a template or track to guide movement of the teeth into proper alignment.
  • End sections of the arch wire are typically captured within tiny appliances known as tube brackets or terminal brackets, which are affixed to the patient's bicuspids and/or molars.
  • the remaining brackets typically include open arch wire slots and apply orthodontic forces by means of ligatures attached to the brackets and arch wire (e.g., by means of tie wings on the brackets).
  • Molar tube brackets often include a curved hook extending from the gingival side of the bracket on which the practitioner can attach an elastic. Such hooks are bent intraorally by the practitioner in a labial or lingual direction to provide the desired orientation. Such intraoral bending of the hook can often result in debonding of the bracket from the tooth, greatly complicating the procedure.
  • the present invention is directed to a molar orthodontic bracket comprising a bracket base, an arch wire hole formed through the base, and a curved hook near a mesial or distal end of the bracket.
  • the curved hook includes a proximal end attached to the bracket base and a curved shank that extends away from the hook attachment location, curving towards the opposite end of the bracket base.
  • the bracket further includes a raised plier stop disposed at a junction between the hook attachment location and the curved hook. The raised plier stop extends laterally beyond an outer surface of the curved hook so as to define a bending location where pliers gripping the curved hook stop during intraoral bending of the hook. Inclusion of the raised plier stop provides a tactile response or feel to the practitioner, indicating that the correct bending location has been found.
  • the molar bracket includes a plurality of tie wings, and the curved hook is located on a gingival side, near a mesial end of the base.
  • the curved hook includes a proximal end attached to one of the tie wings and a curved shank that extends away from the hook attachment tie wing, curving towards the distal end of the bracket base.
  • the bracket further includes a raised plier stop disposed at a junction between the hook attachment tie wing and the curved hook. The raised plier stop extends laterally beyond an outer surface of the curved hook so as to define a bending location where pliers gripping the curved hook stop during intraoral bending of the hook. Inclusion of the raised plier stop provides a tactile response or feel to the practitioner, indicating that the correct bending location has been found.
  • the cross-sectional thickness of the curved hook to be bent is advantageously reduced at the bending location where the pliers grip. Such a reduced cross-section further facilitates bending of the hook at the prescribed bending location. In addition, because the thickness is thinned at the bending location, this further reduces or eliminates any tendency of the bracket to otherwise be debonded from the tooth during intra-oral bending.
  • Figure IA is a perspective view of an exemplary molar orthodontic tube bracket according to the present invention
  • Figure IB is a perspective view of an alternative exemplary molar orthodontic bracket according to the present invention
  • Figure 2 is a cross-sectional view through the bracket of Figure IA;
  • Figure 3 A is a perspective view of the bracket of Figure IA bonded to a molar of a patient
  • Figure 3B is a perspective view of the bracket of Figure 3 A in which a pair of pliers is being positioned for bending of the curved gingival hook;
  • Figure 3 C is a cross-sectional view of the bracket of Figure 3 B illustrating how the pliers abut against the stop of the bracket;
  • Figure 3D is a perspective view of the bracket of Figure 3B once the curved gingival hook has been bent lingually;
  • Figure 3E is a perspective view of the bracket of Figure 3D once an elastic has been engaged within the hook.
  • the present invention is directed to a molar orthodontic bracket comprising a bracket base, an arch wire hole, and a curved hook near a mesial or distal end of the bracket.
  • the curved hook includes a proximal end attached to the bracket body and a curved shank that extends away from the hook attachment location, curving towards the opposite end of the bracket base.
  • the bracket advantageously includes a raised plier stop disposed at a junction between the hook attachment location and the curved hook.
  • the raised plier stop extends laterally beyond an outer surface of the curved hook so as to define a bending location where pliers gripping the curved hook can abut against during intraoral bending of the hook. Inclusion of the raised plier stop provides a tactile response or feel to the practitioner, indicating that the correct bending location has been reached.
  • Figure IA illustrates an exemplary molar orthodontic tube bracket 100 comprising a bracket base 102 extending between mesial end 104 and distal end 106.
  • Base 102 further includes an occlusal side 108 and a gingival side 110.
  • a bonding pad 112 is attached to the lingual surface of bracket base 102.
  • An arch wire hole or tube 114 extends mesially-distally through bracket base 102, and a plurality of tie wings 116 are formed on bracket base 102.
  • the illustrated embodiment includes four tie wings 116, two of which area on occlusal side 108, and two of which are on gingival side 110.
  • the mesial gingival tie wing 116' serves as a hook attachment tie wing, such that a proximal end 118 of curved gingival hook 120 is attached to hook attachment tie wing 116'.
  • Proximal end 118 extends gingivally away from tie wing 116', transitioning to curved shank 122, which curves towards the distal end 106 of bracket base 102.
  • the preferred configuration is shown.
  • curved hook 120 is disposed occlusally and/or is attached near the distal end 106 of the bracket base 102 so that the curved hook extends towards the mesial end 104 of base 102.
  • curved hook 120 is curved sufficiently so that shank 122 forms an angle with the proximal end 1 18 of the curved hook 120 that is about 90° in the illustrated embodiment.
  • shank 122 of the curved hook 120 may typically form an angle with the proximal end 118 that is between about 45° and about 135°, preferably between about 80° and about 100°, and more preferably about 90°.
  • Bracket 100 advantageously includes a raised plier stop 124 disposed at a junction between hook attachment tie wing 116' and curved hook 120.
  • Raised plier stop 124 extends laterally beyond an outer surface of curved gingival hook 120 and defines a location where pliers gripping curved hook 120 abut the stop 124 during bending of curved hook 120. Abutment of the pliers at stop 124 forces the bend to occur at or near the location of the stop 124, rather than elsewhere along the length of curved hook 120.
  • the cross-sectional thickness of curved hook 120 is reduced at this bending location adjacent stop 124, which facilitates bending of the curved hook 120 while minimizing or eliminating the tendency of the bracket 100 to debond from the tooth during intraoral bending of the hook 120.
  • raised plier stop 124 is disposed so as to extend beyond the buccal surface 126 of the curved hook 120.
  • the stop member 124 may often be obscured from the practitioner's view as a result of its intraoral location at the back of the mouth (i.e. , on a molar, adjacent the inside of the patient's cheek), disposition of plier stop 124 along the buccal surface 126 of the bracket 100 may be preferred as it may provide somewhat better visibility of the stop 124.
  • Figure IB illustrates an alternative embodiment in which the raised plier stop is disposed on an opposite lingual surface 128, so that the plier stop 124 extends lingually beyond a lingual surface 128 of the curved hook 120. Nevertheless, buccal placement of the raised plier stop 124 may be further preferred over lingual placement, as lingual placement may interfere with engagement by a ligature with hook attachment tie wing 1 16'.
  • Raised plier stop 124 as seen in Figure IA is shown closer up and in greater detail in the cross-sectional view of Figure 2. As seen in Figure 2, the cross-sectional thickness of curved hook 120 can be reduced through bending location B adjacent stop 124 as compared to the adjacent thickness of tie wing 1 16' and the curved shank 122 of hook 120.
  • This thinning of the cross-sectional thickness at bending location B facilitates bending of the curved hook 120 while minimizing or eliminating the tendency of the bracket 100 to debond from the tooth during intraoral bending of the hook 120, as less force is required to bend hook 120 through thinned bending location B as compared to adjacent locations having greater thickness.
  • raised plier stop 124 may be in the shape of an inclined ramp where the ramped surface 130 is oriented towards hole 1 14, while stop surface 132 of raised plier stop 124 is disposed at an end of ramped surface 130, oriented away from hole 114.
  • Stop surface 132 forms an angle with the buccal surface 126 of curved hook 120 and is of sufficient height to provide the practitioner with a tactile response when placing a pair of pliers against the stop surface 132.
  • the angle between stop surface 132 and buccal surface 126 is between about 45° and about 135°, more preferably between about 80° and about 100°, and most preferably about 90° (i.e., preferably the stop surface 132 is substantially perpendicular to buccal surface 126).
  • stop surface 132 preferably extends beyond buccal surface 126 between about 0.03 mm and about 0.5 mm, more preferably between about 0.05 mm and about 0.15 mm, and most preferably between about 0.07 mm and about 0.13 mm.
  • the ramp surface may typically be inclined between about 3° and about 25°, more preferably between about 10° and about 20° (e.g., about 15°).
  • inclines e.g., up to 90°
  • a sharp incline particularly a perpendicular or nearly perpendicular surface
  • a surface may mimic the tactile feel provided by the stop surface of the raised plier stop.
  • Figures 3A-3E illustrate an exemplary method of using inventive brackets as disclosed herein.
  • Figure 3 A shows a bracket 100 bonded to a first molar 150.
  • a pair of pliers 152 is being maneuvered between the buccal inside cheek of the patient and the bracket 100 so as to grip the curved hook 120.
  • Figure 3C shows a cross-sectional view in which the pliers 152 are in gripping contact with curved hook 120, with the pliers 152 abutting against stop surface 132 of raised plier stop 124.
  • the pliers 152 have been used to bend curved gingival hook 120 lingually, away from the buccal inside cheek surface of the patient.
  • an elastic ligature 154 engages curved hook 120 (e.g., for attachment to a corresponding hook of a canine bracket).

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 porte sur des brackets orthodontiques pour molaires (100) comprenant une base de bracket (102) et un trou ou un tube incurvé (114), une pluralité d'ailettes (116) et un crochet gingival incurvé (120) proche d'une extrémité mésiale du bracket (100). Le crochet incurvé (120) comprend une extrémité proximale (118) fixée à l'une des ailettes de liaison (116') et une tige incurvée (122) s'étendant en s'éloignant de l'ailette de liaison de crochet (116'), en s'incurvant vers l'extrémité distale de la base de bracket (102). Le bracket (100) comprend avantageusement une butée à pince en saillie (124) disposée à une jonction entre l'ailette de fixation de crochet (116') et le crochet incurvé (120). La butée de pince en saillie (124) s'étend latéralement au-delà de la surface extérieure du crochet incurvé (120) de façon à définir un emplacement de courbure où des pinces saisissant le crochet incurvé (120) peuvent venir en butée lors d'une courbure intraorale du crochet (120). L'inclusion de la butée à pince en saillie (124) fournit une réponse tactile au praticien, lui indiquant que l'emplacement de courbure correct a été atteint.
PCT/US2010/026987 2009-03-13 2010-03-11 Bracket orthodontique pour molaire équipé d'une butée à pince à crochet WO2010105059A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15988509P 2009-03-13 2009-03-13
US61/159,885 2009-03-13

Publications (1)

Publication Number Publication Date
WO2010105059A1 true WO2010105059A1 (fr) 2010-09-16

Family

ID=42728784

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/026987 WO2010105059A1 (fr) 2009-03-13 2010-03-11 Bracket orthodontique pour molaire équipé d'une butée à pince à crochet

Country Status (1)

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WO (1) WO2010105059A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102228397A (zh) * 2011-06-23 2011-11-02 广州瑞通生物科技有限公司 一种带正轴功能的个性化正畸矫治器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5306142A (en) * 1992-08-07 1994-04-26 Tp Orthodontics, Inc. Crimpable orthodontic hook
US6325622B1 (en) * 1999-06-11 2001-12-04 3M Innovative Properties Company Orthodontic bracket and latch assembly
US6705862B2 (en) * 2002-03-27 2004-03-16 Dentsply Research & Development Corp. Advanced buccal tube
US20070148610A1 (en) * 2005-12-23 2007-06-28 3M Innovative Properties Company Orthodontic appliance with archwire-engaging clip

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5306142A (en) * 1992-08-07 1994-04-26 Tp Orthodontics, Inc. Crimpable orthodontic hook
US6325622B1 (en) * 1999-06-11 2001-12-04 3M Innovative Properties Company Orthodontic bracket and latch assembly
US6705862B2 (en) * 2002-03-27 2004-03-16 Dentsply Research & Development Corp. Advanced buccal tube
US20070148610A1 (en) * 2005-12-23 2007-06-28 3M Innovative Properties Company Orthodontic appliance with archwire-engaging clip

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102228397A (zh) * 2011-06-23 2011-11-02 广州瑞通生物科技有限公司 一种带正轴功能的个性化正畸矫治器
WO2012174777A1 (fr) * 2011-06-23 2012-12-27 广州瑞通生物科技有限公司 Appareil orthodontique personnalisé ayant une fonction orthoaxiale

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