WO2023025508A1 - Zahnschiene zur behandlung von zahnfehlstellungen mit einer vorrichtung zur befestigung der zahnschiene und deren herstellungsverfahren - Google Patents
Zahnschiene zur behandlung von zahnfehlstellungen mit einer vorrichtung zur befestigung der zahnschiene und deren herstellungsverfahren Download PDFInfo
- Publication number
- WO2023025508A1 WO2023025508A1 PCT/EP2022/071232 EP2022071232W WO2023025508A1 WO 2023025508 A1 WO2023025508 A1 WO 2023025508A1 EP 2022071232 W EP2022071232 W EP 2022071232W WO 2023025508 A1 WO2023025508 A1 WO 2023025508A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fastening device
- splint
- head
- dental splint
- dental
- Prior art date
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
- A61C7/08—Mouthpiece-type retainers or positioners, e.g. for both the lower and upper arch
-
- 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
-
- 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
- A61C7/36—Devices acting between upper and lower teeth
Definitions
- Dental splint for the treatment of misaligned teeth with a device for fastening the dental splint and the manufacturing method thereof
- the present invention relates generally to the field of orthodontics and the reversible attachment of transparent orthodontic splints to correct tooth misalignment.
- Such splints are commonly referred to as aligners.
- the present invention relates to a dental splint for the treatment of misaligned teeth with a device for attaching the dental splint to temporary anchoring elements anchored in the jawbone and the manufacturing method thereof.
- Clear splints for moving teeth have been developed since the late 1990's. These are usually splints made of plastic that can be slipped over a dental arch. First, an impression of the patient's dental arches was taken, and then a digital 3D model of the dentition was created by scanning the impression. Based on this model, the desired alignment of the teeth can be set with interactive computer software.
- the software then suggests incremental intermediate levels between the current and desired alignment, and clear plastic or acrylic aligners are created, which the patient wears for a period of time and then moves on to the next level.
- Each aligner exerts a small corrective force on the teeth by elastically deforming the aligner body, thereby moving the teeth in the desired direction. Treatment can be extended over time as a series of consecutive aligners are used.
- the aligners are generally anchored to the teeth. In some cases, so-called attachments are attached to the teeth for this purpose.
- a disadvantage of the known splint systems is that the effectiveness of aligners is not given for certain tooth movements, since the anchoring in the dental arch always affects the teeth that are not involved in the movement. This often leads to undesired movements and loss of anchorage, which necessitate so-called overcompensation in order to achieve the desired end position of the teeth.
- TADS Temporary Anchorage Devices
- a curved fastener is used to connect the aligner to the temporary anchoring devices
- the teeth to be moved are supported on the jawbone.
- the force is primarily on the teeth to which the fixture is bonded, so the force is not uniform across the arch.
- Another disadvantage is that there is play in the aligners, which are then placed over this arch and parts of the bonded attachment device.
- the adhesive can become detached.
- the fastening device located in the upper or lower jaw is often perceived as annoying by the patient, especially since leftover food can get caught and get caught on the wires or plates of the fastening device.
- the object of the present invention is to provide a dental splint that can be easily fastened in the temporary anchoring elements that can be anchored in the jawbone, allows effective tooth movement and easy cleaning of the oral cavity, and indicates a manufacturing method.
- a dental splint and a helical fastening device that can be fastened in the temporary anchoring element and has a head are provided, the dental splint being designed in such a way that it has at least one cup-shaped recess or opening for receiving the head of the fastening device and the head of the fastening device is shaped in such a way that it can be inserted into the cup-shaped recess or can be inserted through the opening in the toothed splint, so that the fastening device can be connected to the toothed splint in a force-fitting and detachable manner.
- the dental splint is provided with at least one cup-shaped recess or opening according to the invention and the recess is designed to correspond to the shape of the head of the fastening device, so that the head can be inserted into the recesses or through the openings, a non-positive connection is achieved according to the invention provided which can be easily detached by the patient himself by pulling or withdrawing the head of the fastener from the recess or opening.
- the patient can remove the dental splint, which is indirectly attached to the temporary implant, for cleaning and then by pushing on the recesses on or pushing through the openings through the screw heads reinsert yourself.
- Another advantage of the invention is the simple production of the dental splint according to the invention, since, in comparison to the usual production of dental splints, the impression of the dental arch is only carried out with the already implanted temporary anchoring means with the fastening devices connected to them, so that when the splints are produced the Position of the already implanted temporary anchoring means with the attached fasteners can be taken into account.
- the cup-shaped recesses are produced by deep-drawing.
- connection between the fastening device and the toothed splint can be achieved in that the head of the fastening device is nub-shaped, i.e. protruding, and the toothed splint has a recess and is therefore cup-shaped, which corresponds to the negative shape of the head of the fastening device, so that a non-positive connection is achieved when the head of the fastening device is inserted into the corresponding recess in the rail.
- the toothed splint thus completely encloses the head of the fastening device.
- the detachable connection of the toothed splint to the fastening devices is effected by a purely non-positive connection, in that a cylindrical head of the fastening device is inserted into a cylindrical recess in the toothed splint similar to the connection in a Lego® brick.
- the diameters are matched to one another in such a way that the toothed splint can be released from the fastening devices on purpose, but unintentional detachment of the toothed splint from the fastening devices is prevented during intended use.
- the head of the fastening device has an undercut, so that the head of the fastening device can be latched or clamped in the corresponding cup-shaped recess.
- the fastening device can also be referred to as a clamping element.
- the side wall of the head may taper towards the shank, for example, or have a concave or convex shape, or have an outwardly facing edge at the level of the equator of the head. In this variant, both a non-positive connection and, as a result of the undercut, a positive connection are realized.
- the head of the fastening device can be both round and angular, in particular square or hexagonal, or else shaped in some other way.
- the positive and non-positive connection between the fastening devices and the toothed splint is advantageously designed in such a way that the toothed splint can be removed from the fastening devices several times without being destroyed due to the elasticity of the toothed splint material.
- the head of the fastening element can also be bevelled.
- each hollow body open on one side will protrude below a cup-shaped recess, the shape of the hollow body essentially corresponding to the shape of the head of the fastening device.
- the effectiveness of orthodontic treatments with aligner therapies is improved, since the dental splints are anchored indirectly in the bone by means of the fastening devices which are non-positively and preferably also positively connected to the dental splints and which in turn are screwed to the anchoring elements anchored in the bone Less harmful forces are applied to the remaining teeth held in the splint, so that fewer side effects occur.
- the fixation device may be made of mouth-resistant medical grade steel or an oral-approved hard plastic material such as PMMA.
- the dental splint is generally transparent and is preferably an intramaxillary splint, particularly an aligner, namely a transparent plastic or acrylic dental splint for applying forces to move teeth in a jaw.
- the material of the dental splint should have a certain elasticity so that it can be put over the head.
- the dental splint is preferably produced using vacuum or overpressure technology, by means of printing, in particular 3D printing, or by additive manufacturing, in particular additive 3D printing.
- the positions of the cup-shaped recesses in the dental splint or the openings depend on the position of the temporarily implanted anchoring elements.
- the dental splint it is sufficient to fasten the dental splint to a fastening device by means of a cup-shaped recess or an opening.
- the attachment is done with two cup-shaped recesses or openings on two fasteners. More than two fastening devices, in particular three or four, are also possible.
- the invention also relates to a method for producing a dental splint with a fastening device, in which the dental arch and palate area of the patient, including the fastening devices attached to the implanted temporary anchoring elements, are molded or scanned, a 3D model is created from this, and the intermediate stage between the current and the desired alignment of the teeth is calculated and, on the basis of this data and the position of the fastening elements, one or more dental splints with cup-shaped recesses are produced from a transparent plastic material having a certain elasticity.
- Figure 1 shows the palate area with teeth and a dental splint with two cup-shaped recesses for receiving the fastening devices
- FIG. 2 shows a section through a fastening device 30 screwed into the temporary anchoring element with a cylindrical head according to a first variant, the head being accommodated in a cylindrical recess in the dental splint,
- Figure 3 shows the individual parts from Figure 2 as an exploded drawing
- Figure 4 shows a section through a screwed in the temporary anchoring element fastening device with a head with an undercut according to a second variant, wherein the the head can be accommodated and latched or clamped in a corresponding recess in the dental splint,
- FIG. 5 shows a section through an anchoring element (TADS implant) that can be temporarily anchored in the jaw
- Figure 6 shows a section through the screw-shaped fastening device
- FIG. 8 shows a section similar to FIG. 4, but with the head of the fastening device being inserted through an opening in the toothed rail.
- FIG. 1 shows a schematic plan view of the palate area 50 in the upper jaw with the dental arch 51 and the teeth 52.
- a dental splint 20 is slipped over the dental arch 51, which also covers part of the front palate area 53 in the present example.
- the dental splint 20 has two cup-shaped recesses 21, which can be located in the front palate area 53 in the upper jaw shown here.
- the cup-shaped recesses 21 are generally arranged bucally or lingually.
- cup-shaped recesses 21 serve to receive the heads 31 of the screw-shaped fasteners 30, as shown in Figures 2-4.
- connection between the screw head 31 and the cup-shaped recess 21 can only take place due to a form fit, as shown schematically in Figures 2 and 3 with the cylindrical screw head 31, or by means of a force and form fit, as in Figure the screw head 31 with undercut 35 and the correspondingly shaped recess 21 is shown.
- FIGS. 2 and 4 are identical.
- the helical fastening device 30 is connected, preferably screwed, to the temporary anchoring elements 11 anchored in the jaw.
- connection between the temporary anchoring element 11 and the fastening device 30 can also be effected by means of gluing or clamping or in some other way.
- the temporary anchoring element 11 which is shown schematically in FIG. 5, is known per se and has a thread 12 on its outside, by means of which it can be screwed into the jawbone.
- the anchoring element 11 On the side pointing upwards, the anchoring element 11 has drive means 14, for example with a hexagonal profile 14, by means of which the anchoring element 11 can be screwed into the bone with a suitable wrench.
- the fastening device 30 shown in Figure 6 is screw-shaped, has a shank 32 with an external thread 33 and a screw head 31 and is used on the one hand for attachment in the temporary anchoring element 11 and on the other hand for detachable attachment to the rail 20.
- the attachment to the temporary anchoring element 11 takes place by screwing the external thread 33 into the internal thread 13 of the anchoring element 11.
- the shape of the screw head 31 can vary.
- the side wall 37 of the head 31 running perpendicularly to the end face 30 can be cylindrical according to FIG cylindrical recess can be inserted into the toothed rail 20 and is fixed there by a frictional connection (static friction).
- the head 31 can also have an undercut 31, as shown in FIG. 4 and FIG. 7a-c, so that the head 31 can be latched or clamped in the corresponding recess 21.
- the recess 21 has a constriction 23 corresponding to the shape of the head 31 .
- the side wall 37 running perpendicular to the end faces 38 of the screw head 31 can be concave in shape (Figure 7a), or taper in the direction of the shank 32 in the manner of a truncated cone (Figure 7b), or it can have a convex shape or even an edge pointing outwards on the equator 39 of the head 31 have ( Figure 7c).
- the heads 31 with an undercut can also be shaped differently.
- the detachment of the dental splint 20 from the fastening devices 30 in the implanted anchoring elements 11 can be purely both with a force-fitting connection according to FIG. 2, as well as with the snap-in connection according to FIG.
- the head 31 of the fastening device 30 has an undercut 35 and the head 31 is locked with the toothed rail 20, as previously described in Figure 4, but not by means of the cup-shaped recess 21, which corresponds to the shape of the Head 31 corresponds. Rather, the head 31 with the undercut 35 is pushed through an opening 22 in the toothed rail 20 .
- the shape of the opening 22 corresponds to the shape of the head 31 and is preferably circular. However, the opening can also be angular or shaped differently.
- the undercut 35 secures this connection against unintentional loosening.
- This variant makes it possible for an existing dental splint 20 to be fastened to the anchoring elements 11 in the manner according to the invention by means of the fastening devices 30 .
- the fastening devices 30 fastened in the implanted anchoring elements 11 is known, only the corresponding openings 22 need to be made in the dental splint 20, which have such a diameter that the heads of the fastening devices 30 can be pushed through the openings 22.
- the fastening devices 30 are not completely covered by the rail 20 but rather protrude through the openings 22 in the rail 20 .
- the head 31 is surrounded by the openings 22 in the form of a ring.
- the cup-shaped recess 21 which is part of the splint and is molded into the splint material during manufacture, completely covers the fastening devices.
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- 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)
- Dental Prosthetics (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22761955.8A EP4366655A1 (de) | 2021-08-25 | 2022-07-28 | Zahnschiene zur behandlung von zahnfehlstellungen mit einer vorrichtung zur befestigung der zahnschiene und deren herstellungsverfahren |
CN202280057432.9A CN117881363A (zh) | 2021-08-25 | 2022-07-28 | 具有用于紧固夹板的装置的用于治疗牙齿不齐的夹板和其生产方法 |
US18/682,078 US20250127596A1 (en) | 2021-08-25 | 2022-07-28 | Splint for treating tooth misalignments with a device for fastening the splint and production method thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021004365.0 | 2021-08-25 | ||
DE102021004365.0A DE102021004365A1 (de) | 2021-08-25 | 2021-08-25 | Reversible Verbindung zwischen Aligner und Implantat (TADS) |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023025508A1 true WO2023025508A1 (de) | 2023-03-02 |
Family
ID=83152079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/071232 WO2023025508A1 (de) | 2021-08-25 | 2022-07-28 | Zahnschiene zur behandlung von zahnfehlstellungen mit einer vorrichtung zur befestigung der zahnschiene und deren herstellungsverfahren |
Country Status (5)
Country | Link |
---|---|
US (1) | US20250127596A1 (de) |
EP (1) | EP4366655A1 (de) |
CN (1) | CN117881363A (de) |
DE (1) | DE102021004365A1 (de) |
WO (1) | WO2023025508A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060172251A1 (en) | 2005-02-02 | 2006-08-03 | Orthoarm, Inc. | Orthopedic implant for mandibular advancer |
WO2009061079A1 (en) * | 2007-11-08 | 2009-05-14 | Hyun Sang Park | Apparatus for correcting position of teeth |
US20150056566A1 (en) * | 2013-08-26 | 2015-02-26 | Biomaterials Korea Inc. | Maxillary Skeletal Expander Using Mini-Screw |
DE102018114830A1 (de) * | 2018-06-20 | 2019-12-24 | Edwin Schmid | Gaumenerweiterungsvorrichtung für eine kieferorthopädische Behandlung |
US20200383710A1 (en) | 2017-11-24 | 2020-12-10 | Craniofacial Technologies Inc. | Improved maxillary expander and protraction device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3072473B1 (de) * | 2015-03-25 | 2018-08-29 | Ormco Corporation | Kieferorthopädische vorrichtung mit wärmegeformten ausrichtern |
-
2021
- 2021-08-25 DE DE102021004365.0A patent/DE102021004365A1/de not_active Withdrawn
-
2022
- 2022-07-28 EP EP22761955.8A patent/EP4366655A1/de active Pending
- 2022-07-28 CN CN202280057432.9A patent/CN117881363A/zh active Pending
- 2022-07-28 US US18/682,078 patent/US20250127596A1/en active Pending
- 2022-07-28 WO PCT/EP2022/071232 patent/WO2023025508A1/de active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060172251A1 (en) | 2005-02-02 | 2006-08-03 | Orthoarm, Inc. | Orthopedic implant for mandibular advancer |
WO2009061079A1 (en) * | 2007-11-08 | 2009-05-14 | Hyun Sang Park | Apparatus for correcting position of teeth |
US20150056566A1 (en) * | 2013-08-26 | 2015-02-26 | Biomaterials Korea Inc. | Maxillary Skeletal Expander Using Mini-Screw |
US20200383710A1 (en) | 2017-11-24 | 2020-12-10 | Craniofacial Technologies Inc. | Improved maxillary expander and protraction device |
DE102018114830A1 (de) * | 2018-06-20 | 2019-12-24 | Edwin Schmid | Gaumenerweiterungsvorrichtung für eine kieferorthopädische Behandlung |
Non-Patent Citations (1)
Title |
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See also references of EP4366655A1 |
Also Published As
Publication number | Publication date |
---|---|
CN117881363A (zh) | 2024-04-12 |
EP4366655A1 (de) | 2024-05-15 |
DE102021004365A1 (de) | 2023-03-02 |
US20250127596A1 (en) | 2025-04-24 |
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