EP2157933A2 - Vis d'ancrage orthodontique - Google Patents

Vis d'ancrage orthodontique

Info

Publication number
EP2157933A2
EP2157933A2 EP08759179A EP08759179A EP2157933A2 EP 2157933 A2 EP2157933 A2 EP 2157933A2 EP 08759179 A EP08759179 A EP 08759179A EP 08759179 A EP08759179 A EP 08759179A EP 2157933 A2 EP2157933 A2 EP 2157933A2
Authority
EP
European Patent Office
Prior art keywords
screw
fixing
wire
groove
orthodontic
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Withdrawn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
EP08759179A
Other languages
German (de)
English (en)
Inventor
Holger Zipprich
Cornelius Geist
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 EP2157933A2 publication Critical patent/EP2157933A2/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Withdrawn legal-status Critical Current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
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • 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
    • A61C7/20—Arch wires
    • 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
    • A61C7/34—Securing arch wire to bracket using lock pins
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0089—Implanting tools or instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0093—Features of implants not otherwise provided for
    • A61C8/0096—Implants for use in orthodontic treatment

Definitions

  • the invention relates to a fixation wire, in particular a for applying treatment forces to a tooth.
  • a major focus in orthodontics in therapeutic treatments is directed to the targeted and controlled movement and displacement of teeth.
  • such a translational or rotatory movement of a tooth can be achieved only by the action of external forces, which are exerted accordingly on the tooth in order to move it within the jaw.
  • the tooth is exposed to the external force over a long period of time. This force is therefore transmitted to the tooth via suitable fixation means until it assumes the desired positioning and / or orientation in the oral cavity.
  • the application of an external force to the tooth usually takes place via clamps, wires, rubbers or other suitable force-exerting elements. For this purpose, however, a corresponding fixation of the force-applying elements in the oral cavity is always necessary.
  • Such support of the force-applying elements is usually performed on one or more teeth, for example, two or more suitably positioned to each other teeth are connected together by a clamping element, which is then, for example. is tensioned on train.
  • a clamping element which is then, for example. is tensioned on train.
  • two or more teeth are subjected symmetrically to forces and these are undesirably displaced or rotated together with the tooth to be treated, although this is intended and desired only for the tooth to be treated.
  • the targeted displacement during the treatment of the one tooth is thus inevitably associated with an undesirable or only conditionally acceptable change in position of the other or the other teeth, which are used for fixing the force-applying elements.
  • an anchorage via one-piece or multi-part temporary screws can also be carried out, which can be temporarily inserted into the jawbone and removed again after the tooth or several teeth have been displaced.
  • anchoring screws of this kind must therefore be introduced in such a way that a later removal from the bone remains possible.
  • a reliable and resilient fit of the respective, provided as the counterpoint anchoring screw is indispensable.
  • the anchoring screw after screwing has a strength in the bone, which is based on the tension of the screw with the bone. This strength is also called primary stability. However, as the bone responds to mechanical stresses and reorganises itself, this strength initially decreases as a result of the rearrangements with increasing wearing time. On the other hand, with the incipient colonization of the screw material with cells, especially bone cells, further strength builds up over the composite of the cells with the screw material. This is called Oseointegration. The strength in the bone should be sufficient during the entire insertion period to be sufficient as an abutment for the displacement of at least one tooth.
  • the surrounding soft tissue is additionally burdened.
  • the soft tissue in particular that of the cheeks and the tongue, is guided past the teeth.
  • this movement is disturbed.
  • deburred Geometries often cause injuries and inflammation of the surrounding soft tissue. Only after a few weeks can the surrounding soft tissue become accustomed to the new situation, so that the pain for the patient and the inflammations of the soft tissue are reduced. Therefore, any foreign objects introduced in the mouth should avoid sharp and sharp-edged geometries and keep the radii as large as possible to make the transitions as harmonious as possible.
  • the wires inserted in designated formations in the form of grooves this is referred to as alloying.
  • the alloying is to prevent the falling out or premature loosening and loosening of the wires from the screw. If there is an extra-axial bore to the screw axis, the wire can be passed through this hole and not fall out like a groove.
  • a disadvantage of this design is that the holes due to the production have a round diameter and therefore no assurance against a rotational displacement of the wire is given more.
  • the head of the orthodontic anchoring screw is wrapped with wire and optionally additionally secured with an adhesive, there is little risk of loosening when using a wire with a round cross-section and it is sufficiently secured against falling out and translational and rotational displacement.
  • the wrapping of the head of the orthodontic anchoring screw with a square cross-section wire designed as much more difficult, but is carried out by the attending physician and then also protects the wire from unwanted displacement or falling out of the groove.
  • a disadvantage of this attachment method is that in both embodiments of the wires there is a risk that irritate or even injure the surrounding soft tissue by wrapping the head of the orthodontic anchoring screw pointed and sharp-edged elements of the wire and thus inflict pain on the patient. An inflammation of the soft tissue is even possible. Furthermore, the treatment time is unnecessarily extended by the wrapping of the screw head and disassembly difficult.
  • the wire By attaching a rubber to the head of the orthodontic anchoring screw in a specially designed shape in the form of a at least partially circumferential around the head groove, the wire can also be secured against falling out. Soft tissue injury or inflammation can be avoided or reduced by proper positioning of the wire and rubber. Wires with an angular cross-section are additionally secured sufficiently against a rotational displacement due to the geometric shape of the groove. A disadvantage of this method is that the wires can not be sufficiently secured against a translational displacement. Such a backup could be done by additional gluing. This would however lead to a difficult dismantling of the wire after the treatment and, as already described above, may irritate the surrounding soft tissue. In addition, the use of two successive steps would increase the treatment time.
  • the invention is therefore an object of the invention to provide a fastener for force-applying elements of anchoring screws in orthodontic treatment methods, which is protected at low maintenance assembly and disassembly time in the simplest way against translational and rotational displacements and falling out.
  • the fixing wire has a broadening zone produced by plastic deformation for its longitudinal fixation in a corresponding fixing recess of an orthodontic anchoring screw.
  • FIG. 1 an orthodontic anchoring screw
  • FIG. 2 a screw head of an orthodontic anchoring screw
  • FIG. 4 shows a screw head with inserted fixation wire
  • FIG. 5 shows different embodiments of the fixation wire
  • FIG. 8 shows a screw head with a fixing recess
  • FIG. 9 shows a tool for receiving and aligning the screw head
  • FIG. 10 to 13 different screw heads with different central bores
  • FIG. 15 shows a fixing pin on a screw head
  • FIG. 16 shows a fixing pin with a clamping element on a screw head
  • FIG. 16 shows a fixing pin with a clamping element on a screw head
  • FIG. 17 and FIG. 18 a tool for receiving and aligning the screw head with a receiving mandrel, 19 shows an orthodontic anchoring screw with a different threaded area.
  • a passage region 4 adjoins the screw head 2 before the anchoring screw 1 merges into a threaded region 6.
  • the thread beginning 8 borders.
  • the anchoring screw is screwed into the jaw and provides an anchoring possibility in the treatment of number misalignments due to the positive connection with the surrounding bone material of the jaw.
  • a tooth to be treated is held under tension by means of wires, for example, and thus pulled or turned into the desired position. These wires are fixed to the anchoring screw to the anchoring screw.
  • a molding in the form of a groove 10 is shown in screw head 2 of the orthodontic anchoring screw according to FIG. 2, therefore, a molding in the form of a groove 10 is shown.
  • a groove is - as shown in Fig. 2 - preferably introduced orthogonal to the screw axis in the screw head.
  • the screw head 2 according to FIG. 2 also has a main body 12, from which an upper body 14 extends. In the transition region between the base body 12 and the upper body 14, a molding in the form of a fixing groove 16 is introduced.
  • the groove used for the fixation of the wire 10 divides in the screw head 2 of FIG. 2, the upper body in two halves and penetrates into the main body 12 of the screw head 2 a.
  • the screw head 2 according to Figure 3 in addition to that of FIG. 2, an additional groove 10 which is arranged both orthogonal to the screw axis and the first groove 10.
  • This allows the insertion of a wire from several directions.
  • the upper body 14 of the screw head 2 is additionally weakened when using multiple grooves and the risk of breakage increases significantly. Therefore, the number of grooves is usually limited to two, which are arranged in a cross shape as shown in Fig. 3.
  • a fixing wire 18 has already been alloyed into one of the grooves.
  • these fixation wires 18 have a round or angular cross-sectional area.
  • For square cross-sectional areas preferably rectangular versions are used with the edge lengths 0.22 mm and 0.19 mm.
  • a safeguard against translational displacements, ie displacements along the groove 10, can be achieved according to the invention by a plastic deformation of the fixing wire 18 with corresponding formations in the upper body 14 of the screw head.
  • the fixing wire 18 is changed by plastic deformation in its cross-sectional geometry.
  • Such a plastically deformed wire is shown in Figures 5 to 7.
  • Plastic deformation and / or deformation can lead to different changes in the geometry of the wire.
  • the wire can be bent or angled one or more times, additionally or only thickened and / or thinned (FIGS. 5a, 5b, 5c).
  • Pliers are preferably used for the plastic deformation. This pliers is designed so that it deforms the fixing wire 18 at the desired location, but this does not break.
  • the forceps is adapted to the geometric conditions of the fixing wire 18.
  • the tapering of an edge length achieved in the plastic deformation by a pair of pliers results in a broadening of the edges perpendicular thereto. This creates a widening zone 20, which can form a locking mechanism with corresponding formations on the screw head.
  • the fixing wire 18 is also protected against translatory displacements along the groove 10.
  • the fixing wire 18 is thickened in a direction perpendicular to the working direction of the squeezing, pressing or shearing process. Is the area If the thinning and thickening are too small, as shown in FIG. 6, a notch effect can occur which markedly reduces the strength of the wire.
  • the pressing length b that is, the length of deformation in the wire direction, is at least half of the fixing wire width a and / or the fixing wire height.
  • the pressing length b is greater than the fixing wire width a or Fix istsdraht doubt.
  • the screw head 2 according to FIG. 8 has a fixing recess 22, which is embedded in the upper body 14 and extends on both sides of the groove 10.
  • a fixing wire 18 previously plastically deformed, for example with a corresponding pliers, is inserted from above into the groove 10 of the screw head 2, wherein the widening zone 20 of the fixing wire 18 lies in the fixing recess 22.
  • the screw head 2 has a fixing groove 16.
  • a security element for example a rubber, is inserted after the fixation wire 18 has been inserted which protects the fixing wire 18 from falling out of the groove 10.
  • the fixing wire 18 is thereby alloyed into the screw head 2.
  • the fixing groove ideally has a circumferential depth of at least 0.3 mm, preferably greater than 0.4 mm and in particular a depth greater than 0.5 mm.
  • the fixation wire can also be fixed by gluing, by wrapping the screw head with the fixation wire 18 itself or another wire or with other tools.
  • fixing wires 18 In the screw head 2, two centrally intersecting grooves 10.
  • the fixing wires 18 are usually inserted in the direction of the dental arch.
  • the base body 12 of the screw 2 advantageously planar side surfaces 24, in which the tool 26 engages for screwing the anchoring screw 1. It happens, however, that the tool 26 when screwing the anchor bolt 1, the grooves 10 covered and it is not possible for the attending physician to align the grooves 10 to the needs.
  • the screw head 2 according to FIG. 9 has twice the number of side surfaces 24 as grooves 10, but may also have another non-circular outer contour, and the associated tool 26 has a correspondingly adapted inner contour of the receiving channel. Since these two surfaces are used in the screw head 2 of FIG. 9, which together form a cross groove, the tool 26 used for screwing has four positioning options on the screw head 2. In a cross groove is suitable Consequently, a square tool for introducing the anchoring screw 1 in the jawbone. Therefore, the tool 26 is externally provided with four marking surfaces 28 which are positioned to correspond to the orientation of the cross groove. These marking areas allow the treating physician to obtain information about the position of the cross groove. Therefore it is possible for him to wanted to make positioning of the grooves without having to remove the tool 26 when inserting the screw head 2.
  • the fixing recesses 22 can be introduced by the methods already described above.
  • the fixing recess 22 may refer to only one groove 10 or part of a groove 10.
  • the shape of the fixing recess 22 can assume different geometries as described for the simple groove 10. Ideally, however, the fixing recess is located at the central crossing point grooves 10. In the intersection of two grooves 10 - as shown in the screw head of Fig. 10 - arise at the intersection four corners, each having an angle of about 90 ° and have downwardly extending inner edges 30.
  • the upper body 14 is thereby separated into four areas.
  • the inner edges 30 of the four regions of the upper body 14 are removed or reshaped using one of the methods already described. In this way, the distance between the non-adjacent regions of the upper body 14 increases.
  • the change in distance can be less than 0.2 mm, but is preferably greater than 0.3 mm and in particular greater than 0.4 mm.
  • the removal or the deformation of the inner edges 30 can be done in several steps and the Fix istsausEnglishept 22 have different radii and shapes. Among other things, concave, convex (FIGS. 12a, 12b, 12c), inwardly or outwardly inclined inner edges or even meandering shapes (FIGS. 13a, 13b, 13c) are conceivable. Also, combinations of these or other geometric shapes are conceivable. This caused by the removal or deformation FixtechniksausEnglishung 22 should preferably be performed at least to the bottom of the groove 10, but can also be designed deeper than the groove 10 in a particularly favorable variant.
  • a very easy to produce and particularly favorable variant offers a round fixing recess 22, which is preferably positioned in the middle of Nutennchung. Such an embodiment can be made via a standard bore or an end bore. This simplifies the production and produces with many variants of the Fix istsdrahtver- or transformations a locking mechanism.
  • the hole depth may be less than, equal to, or greater than the groove depth.
  • the round, central fixing recess 22, which is preferably positioned at the crossing point of the two grooves, has further advantages.
  • components such as a fixing pin 32 as shown in FIG. 14, alone or together with a fixing wire 18 in the screw head 2 can be inserted.
  • the fixing pin 32 according to FIG. 14 has a centering pin 34 adapted to the fixing recess 22.
  • This centering pin 34 preferably has a round cross-section corresponding to the fixing recess 22, which facilitates the insertion of the fixing pin 32 into the screw head 2.
  • the fixing pin 32 also has a number of side arms 36 which engage in the insertion of the fixing pin - as shown in Fig.
  • the fixing pin also has a receiving head 40 and a receiving groove 42. Through this receiving head additional clamping elements 44 - as shown in Fig. 16 - are attached to the anchoring screw 1 and thus several teeth are treated simultaneously via an anchoring screw 1.
  • additional clamping elements come here, for example, wires, rubbers, springs and other force-applying elements in question.
  • a significant advantage of the fixing pin 32 according to the invention is that on an anchoring screw 1 all commonly used in an orthodontist clamping elements can be easily and securely attached. By the common fasten or einlegieren of a fixing wire 18 and a fixing pin 32 even has the possibility to fix several clamping elements simultaneously, as shown in Fig. 16.
  • a round fixation recess 22, for example, through a bore still has another advantage.
  • the screws Before screwing the screws into the jaw, the screws are usually in a holder, which is referred to as a trail.
  • a trail Before screwing the screws into the jaw, the screws are usually in a holder, which is referred to as a trail.
  • the screw it is advantageous if the screw can be attached to the intended for screwing into the bone tool 26 so that the orthodontic anchorage screw 1 can not fall out of the tool 26. To achieve this, therefore, the tool according to FIG. 17 has a receiving mandrel 46.
  • This mandrel can be introduced into the fixing recess 22 of the screw head 2 and thus produces a frictional connection between the anchoring screw 1 and the tool 26 Receiving mandrel 46 and the cross groove small, the wear on the Fix istsaus Principleung 22 is greater than when the area between the mandrel 46 and the cross groove is large. If the fixing recess 22 has a round cross-sectional area, for example through a bore, at the crossing point of the cross groove, the contact surface is maximized (FIG. 18) and the wear of the fixing recess is minimized. This leads to a long life of the tools 26 and anchoring screws. 1
  • the screw head 2 is provided with a cross groove, a fixing groove 16 and an additional fixing recess 22 in the form of a central bore and formed on a shaft provided with a multi-step thread.
  • This multi-stage thread advantageously has, in addition to the single thread, a two or more thread, which is preferably mounted in the direction of the screw head.
  • the two or more threads improves above all the primary but also the secondary stability of the screw in the bone. Since with several force-exerting elements and higher forces and loads on the screw and thus on the bond between screw and bone are exerted as if only one force-exerting element is attached, an improved strength of the screw in the bone proves to be advantageous.
  • the cross groove has a width of more than 0.55 mm, a depth of more than 1 mm but in particular more than 1, 2 mm and has a central Fix istsausANSung 22, preferably made by a bore, with a diameter greater than 1mm but preferably as larger 1, 2mm.
  • a head with these properties can be a rectangular profile wire with a commonly used by orthodontists rubber and lock on a plastic deformation in the direction of the inserted groove 10 against displacement.

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)
  • Orthopedic Medicine & Surgery (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

L'invention concerne un fil de fixation, servant en particulier à exercer des forces de traitement sur une dent, ce fil ne devant pas faire l'objet de mouvements de translation et de rotation ni sortir de son logement grâce à des moyens simples tout en présentant un temps de montage et un temps de démontage limités. À cet effet, le fil de fixation selon l'invention présente une zone d'élargissement, produite par déformation plastique, en vue de sa fixation longitudinale dans un logement de fixation correspondant ménagé dans une vis d'ancrage orthodontique.
EP08759179A 2007-06-11 2008-06-11 Vis d'ancrage orthodontique Withdrawn EP2157933A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007027606A DE102007027606A1 (de) 2007-06-11 2007-06-11 Kieferorthopädische Verankerungsschraube
PCT/EP2008/004669 WO2008151787A2 (fr) 2007-06-11 2008-06-11 Vis d'ancrage orthodontique

Publications (1)

Publication Number Publication Date
EP2157933A2 true EP2157933A2 (fr) 2010-03-03

Family

ID=39769526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08759179A Withdrawn EP2157933A2 (fr) 2007-06-11 2008-06-11 Vis d'ancrage orthodontique

Country Status (5)

Country Link
US (1) US20110053109A1 (fr)
EP (1) EP2157933A2 (fr)
CA (1) CA2691556A1 (fr)
DE (1) DE102007027606A1 (fr)
WO (1) WO2008151787A2 (fr)

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Publication number Priority date Publication date Assignee Title
JP4680209B2 (ja) * 2007-01-26 2011-05-11 康寛 斉宮 歯列矯正用のインプラント構造
ITVI20090191A1 (it) * 2009-07-27 2011-01-28 Hdc S R L Dispositivo ortodontico con un sistema di fissaggio auto-legante per apparecchi ortodontici con una parte filiforme
JP5753691B2 (ja) * 2011-01-17 2015-07-22 康寛 斉宮 歯列矯正用の連結冶具
JP2013141582A (ja) * 2012-01-12 2013-07-22 Wildent:Kk 歯列矯正用インプラント
DE102012014527A1 (de) * 2012-07-23 2014-01-23 Enrico Pasin Skelettale Verankerungsvorrichtung
WO2014134328A1 (fr) 2013-02-27 2014-09-04 Coorstek Medical Llc D/B/A Imds Fixation de greffon
JP5728610B1 (ja) * 2014-08-07 2015-06-03 医療法人クリエイティングスマイルズ 歯科矯正用インプラント装置
DE102014217871A1 (de) * 2014-09-08 2016-03-10 Enrico Pasin Kieferorthopädischer Schraubenschlüssel zum Anbringen und Lösen einer kieferorthopädischen Schraube
CN108245265A (zh) * 2016-12-28 2018-07-06 上海交通大学医学院附属第九人民医院 微螺钉

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US2821020A (en) * 1955-06-06 1958-01-28 Rocky Mountain Metal Products Orthodontic sectional arch wire
US3043007A (en) * 1959-06-02 1962-07-10 Wallshein Melvin Orthodontic brackets
US4424033A (en) * 1982-08-02 1984-01-03 Wool Arthur L Orthodontic appliance
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US6722879B2 (en) * 2002-08-05 2004-04-20 Cheng-Yi Lin Screw device for orthodontic treatment
WO2004060193A1 (fr) * 2003-01-07 2004-07-22 Chikami Miltec Inc. Bracket et fil metallique pour arc orthodontiques

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Also Published As

Publication number Publication date
WO2008151787A2 (fr) 2008-12-18
DE102007027606A1 (de) 2008-12-18
US20110053109A1 (en) 2011-03-03
CA2691556A1 (fr) 2008-12-18
WO2008151787A3 (fr) 2009-04-02

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