WO2007128270A2 - Procédé de production d'un appareil orthodontique présentant des zones souples et des zones dures - Google Patents

Procédé de production d'un appareil orthodontique présentant des zones souples et des zones dures Download PDF

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Publication number
WO2007128270A2
WO2007128270A2 PCT/DE2007/000772 DE2007000772W WO2007128270A2 WO 2007128270 A2 WO2007128270 A2 WO 2007128270A2 DE 2007000772 W DE2007000772 W DE 2007000772W WO 2007128270 A2 WO2007128270 A2 WO 2007128270A2
Authority
WO
WIPO (PCT)
Prior art keywords
soft
hard
rail
plastic
cuvette
Prior art date
Application number
PCT/DE2007/000772
Other languages
German (de)
English (en)
Other versions
WO2007128270A3 (fr
Inventor
Konrad Hofmann
Original Assignee
Smh Biomaterial Ag
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 Smh Biomaterial Ag filed Critical Smh Biomaterial Ag
Publication of WO2007128270A2 publication Critical patent/WO2007128270A2/fr
Publication of WO2007128270A3 publication Critical patent/WO2007128270A3/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
    • A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • A61C13/12—Tools for fastening artificial teeth; Holders, clamps, or stands for artificial teeth
    • A61C13/16—Curing flasks; Holders therefor
    • 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
    • A61C13/20—Methods or devices for soldering, casting, moulding or melting
    • A61C13/206—Injection moulding

Definitions

  • the invention relates to a method for producing a toothed rail with soft and hard rail areas.
  • Dental splints are widely used in the dental field and are preferably used in snoring therapy, dental prosthetics or orthodontics. They also serve as night bite protection against unwanted abrasion during sleep. Such splints are preferably used in sleep and snoring therapy, often in conjunction with adjusters, for the treatment of sleep apnea. They serve in this area as Kieferprotrusionsschienen for defined positioning of the tooth jaw.
  • tooth rails From the prior art methods for the production of tooth rails are known in which the toothed rail consists of a single material and a single hardness property.
  • a dental splint is generally made of a hard plastic material which has dimensionally stable and only limited soft material properties. Such hard splints wear out easily after prolonged use and lose their fit and adhesive property in the dentition.
  • metallic key springs are used in some designs, which transmit holding forces to the teeth by means of a resilient action at individual points of the splint area.
  • the splints are constructed of a plurality, preferably two, materials.
  • the interior of the dental splint, which conforms directly to the tooth surface, is made of an elastic plastic. This is glued by means of adhesive with a hard, the outer surface of the dental splint forming plastic rail. Due to the soft interior of the toothed rail, a uniform distribution of holding forces and a gentle treatment of the teeth during insertion and removal of the dental splint are given.
  • the object of the present invention proposes a method for producing a dental splint with soft and hard splint regions, which is the target To allow a high wearing comfort and a long life, while the tooth surfaces to protect when inserting and removing the dental splint, to reduce the possibility of the formation of pathogens in the dental splint and to enable a repair of the dental splint.
  • the rack should be able to withstand temperatures above 50 ° C for effective cleaning, be dyeable as a whole and thereby be as easy and inexpensive to manufacture in the production with the previous means of tooth rail processing.
  • the inventive method for producing a toothed rail with soft and hard rail areas is characterized in that the materials of the two rail areas have the same plastic base.
  • the soft rail region of the dental splint is made of a soft elastic formulation containing at least one mono- or oligomer.
  • the soft rail portion is bonded without the use of an additional adhesive with a hard, dimensionally stable design of a plastic dissolved by the formulation described above to form a hard rail portion.
  • the mono- or oligomer has the property of being able to dissolve in at least one polymer of the hard rail area, in particular in its own polymer.
  • connection of the soft elastic design of the plastic with the hard design of the plastic is carried out by a polymerization process, so that no connection boundary is recognizable and the areas different degrees of hardness merge together.
  • the different degrees of hardness of the plastic are influenced by the addition of plastic additives, such as plasticizers.
  • plastic additives such as plasticizers.
  • the fusion of two embodiments of the same plastic results in an integrally molded plastic rail made of a material without adhesive layer, which may have soft rail areas in the interior, so that a high level of comfort and a comfortable fit are guaranteed.
  • there are no boundary layers within the dental splint which can be solved by detachment of adhesives and in which pathogens can form.
  • the plastic rail discolors, if at all, only homogeneously, since only a single plastic base is contained in it.
  • the dental splint is repairable due to its polymerizability and its construction of a material, since broken or chipped parts can either be abraded or re-added using a polymerization process.
  • the inventive method is also excellent to an already manufactured plastic rail, which was made of a hard, dimensionally stable design of the plastic and eventu also has already been worn, subsequently by applying the soft version of the plastic in their comfort and in improve their passability.
  • the monomer methyl methacrylate is used as mono- or oligomer.
  • This can be used both in the soft rail area and in the hard rail area.
  • Methyl methacrylate is characterized in that it is easy to process as a thermoplastic, the monomer dissolves in its polymer and is present both in hard and in combination with other mono- or oligomers in soft embodiments.
  • This plastic can be applied, for example, in powder form as a polymer in granular consistency and mixed with a liquid monomer by cold polyols. merization be connected so that depending on the imple mentation form an elastic, soft or dimensionally stable, hard area of a dental splint can be formed.
  • Methyl methacrylate is characterized in that it is resistant to staining, chemically extremely unassailable, is very easy to work, preferably by grinding, polishing or application, and thereby has a high thermal resistance (up to about 100 ° C).
  • Racks made of methyl methacrylate are easy to disinfect and have a high mechanical abrasion resistance.
  • Dental splint with a soft, elastic embodiment of the same plastic base for lining the dental splint at the contact areas to the teeth, resulting in a very good fit and a comfortable fit. Due to the soft, elastic interior design of the dental splint, the holding forces are distributed over a large area, and the tooth surfaces are protected during insertion and removal of the dental splint.
  • the combination of the polymer MMA in powder form with the monomer MMA in liquid form enables a simple and cost-effective production and repair of broken or chipped parts by a two-component technique. Due to the thermo-elastic properties of the MMA, a repair can be carried out very easily by heating individual regions of the dental splint.
  • the hard rail area is> 90 m% and the soft rail area is> 10 m% of methyl methacrylate.
  • the soft rail region consists of> 15% methyl methacrylate and in a most preferred form> 20% methyl methacrylate.
  • the production method comprises the following method steps: First, a Gypsum tooth model covered with a spacer material. This spacer material defines the thickness, ie the thickness, of the soft region of the dental splint which bears directly against the row of teeth. After the spacer material has been applied to the row of teeth of the gypsum dental model, the joints between the plaster tooth model and the spacer material can be closed by wax in order to prevent the gypsum from penetrating the cuvette mold. In the subsequent step, the gypsum model with the spacer material is placed in a cuvette, and this cuvette is poured with gypsum to create a cuvette shape.
  • the spacer material is removed, and the cuvette is inserted into a plastic injection device, so that a soft execution of the plastic can be pressed into the space between plaster model and cuvette shape.
  • This is followed by curing of the pressed-in plastic to create a soft rail area.
  • a gypsum tooth model created by a plaster cast of the row of teeth of a patient is coated with a spacer material.
  • This spacer material defines the thickness, ie the thickness, of the soft toothed rail areas.
  • This spacer material serves as a placeholder material in the subsequent
  • the gypsum tooth model with the hardened soft rail region are removed from the cuvette after the above-mentioned process steps and the hard rail region is made by applying a hard execution of the plastic to the soft rail region by a polymerization process. That is, after curing of the soft rail portion in the cuvette shape, the gypsum tooth model with this cured rail portion is removed from the cuvette mold and applied to the soft rail portion by a two-component technique by using the powdery polymer and a hard plastic type liquid monomer becomes. For this, the soft rail area is wetted with the monomer and the polymer is sprinkled over it. With the help of a spatula or other shaping aids, the polymer / monomer mixture can be brought into a desired shape. After applying the hard finish of the plastic to form a hard rail area, the finished rail is finished by means of a curing process.
  • the following method steps can be used to produce the hard rail area.
  • the cuvette mold can be manually reworked to define an additional casting gap between the soft rail region and the cuvette mold. This casting gap defines the space for the post-molding of the hard plastic finish to create a hard rail area.
  • the gypsum tooth model with soft rail area is inserted in the post-processed cuvette mold, and becomes a hard version of the plastic pressed into the space between the soft rail area and cuvette shape using a Kunststoffeinpressvoriques, and then a curing of the pressed-plastic hard rail area is performed.
  • Gypsum teeth row is sealed by means of a wax layer, so that the pressed-hard plastic can not penetrate into the intermediate joint between the soft rail area and gypsum tooth model.
  • the coverage of the row of teeth of the gypsum tooth model with a spacer material is arbitrarily feasible.
  • a wax layer is used as the spacer material.
  • a spacer film is drawn by thermoplastic deep drawing over the gypsum tooth model, so that the row of teeth is covered with a film of defined thickness. After deep drawing, the foil must be cut out and thus covers the row of teeth in a form-fitting manner.
  • thermoplastic deep-drawing of the spacer film takes place over the gypsum-tooth model in a temperature range from 200 ° C. to 250 ° C.
  • the spacer foil used is extremely flexible and adaptable and can even reproduce even the smallest gaps in the teeth of the gypsum tooth model.
  • the thickness of the soft rail area be adjusted after removal of the spacer material by manual reworking of the cuvette mold.
  • sharp edges and corners in the cuvette shape can be rounded off, and in particularly critical areas, the size of the injection mold can be increased in order to allow a sufficiently thick and contoured shaping of the soft rail area.
  • the injection of the plastic into the cuvette with the help of Kunststoffeinpressvoriques takes place under a pressure range of 3 to 10 bar. If the pressure range is set too low, there is a risk that individual areas of the cuvette shape will not be sufficiently filled with plastic. If, however, the pressure is too high, there is a risk on the other hand that the cuvette shape or the gypsum-tooth model will be damaged or leakage will cause filling compound to penetrate into intermediate joints. After pressing the plastic into the cuvette mold, the plastic must harden. It has proven to be particularly advantageous if the curing of the pressed plastic in the cuvette in a temperature range of 70 ° C to 120 ° C for a period of 30 to 120 minutes. By such a temperature range and such a period of time it is ensured that the resin homogeneously hardens homogeneously without impurities, so that the toothed rail has a particularly regular structure.
  • the hard splint region After hardening of the soft splint region of the dental splint, the hard splint region must be connected to the soft splint region by a polymerization process.
  • To prepare the application of the hard rail area on the soft rail area it is again particularly favorable if joints between gypsum tooth model and the soft rail area are sealed by applying a wax layer before applying the hard rail area on the soft rail area.
  • the wax layer serves to prevent ingress of unwanted mass, in this case the plastic hard version, and to create well-defined areas of the soft and hard dental splint.
  • the hard rail area is applied to the soft rail area by manual application, it is extremely favorable if the hard rail area is applied to the soft rail area by a cold polymerization process in which a powdery polymer version of the hard Plastic version is powdered on the soft rail area and grows by adding a liquid monomer version, the hard version of the plastic by cold polymerization on the soft rail area, so that a hard rail area arises.
  • a two-component technique by fusion of the powdery polymeric plastic with the liquid monomeric plastic it is possible by means of Rule and custom design of the hard rail area a well-formed and special circumstances considering rail area are formed.
  • a targeted strengthening of the hard rail area at critical points or a particularly thin shaping of the hard rail area in other places is possible.
  • a hard rail area is formed according to the method described above, it has proven to be particularly advantageous that after applying the hard rail area to the soft rail area, the rack rail in a water bath in a pressure range of 2 to 3 bar and a temperature range of 30 to 60 ° C hardens.
  • the hard rail area is not yet cured immediately after manual application, i. the polymerization process is still ongoing. In order to complete this polymerization process as homogeneously as possible in the entire rail area, the curing under the given pressure and temperature range leads to particularly advantageous designs of the toothed rail.
  • the plastic used in the construction of a dental splint is colorless.
  • the method described above makes it possible to produce a dental splint with hard and soft splints made of a single type of plastic.
  • coloring the plastic it is in principle possible and advantageous to use colored plastic to adapt the rack to desired requirements.
  • tooth rails can be produced in different colors or achieve special effects, for example, by the addition of phosphorescent materials.
  • FIG. 1 in perspective schematic representation of a resulting from the process rack
  • FIG. 2 is a perspective view of a plaster tooth model
  • FIG. 3 shows a perspective view of a cuvette
  • FIG. 4 is a schematic sectional view of a plastic injection device with inserted cuvette
  • Fig. 6 is a schematic sectional view of the structure of a toothed rail with hard and soft rail areas.
  • Fig. 1 shows a schematic perspective view of a toothed rail 01 with hard and soft rail areas, which emerges from the method according to the invention.
  • FIG. 2 shows a plaster tooth model 02, which represents the starting point of the method.
  • a spacer material for example a wax layer or a deep-drawn spacer foil, can be applied to the row of teeth of the plaster tooth model 02, the thickness of which then defines the thickness of the soft toothed rail area.
  • FIG. 3 shows a cuvette 03, in the interior region 04 of which a plaster tooth model 02 provided with a spacer material can be inserted. Thereafter, the cuvette 03 is filled with gypsum, so that at least the area of the teeth coated with the spacer material tooth row is filled with gypsum. After removal of the spacer material of the gypsum teeth row results after insertion of the gypsum tooth model 02 in the inner region of the cuvette 04 an ejection mold, which has a space between gypsum tooth row and cuvette shape and which can be ejected from a soft version of the plastic.
  • the Kunststoffeinpressvoriques 05 necessary for introducing the plastic is shown in Fig. 4 in a schematic sectional view.
  • a plastic capsule 06 is inserted, in which a pressing cylinder 07 is located.
  • a pressing cylinder 07 is located.
  • the pressing cylinder 07 with a predefined pressure of the still liquid plastic is passed through injection channels 09 in the cuvette mold 1 1 and fills there the ejection between plaster model and cuvette mold 11.
  • the cuvette 1 1 is held in a clamping frame 10, which receives the press-in pressure of the pressing cylinder 07.
  • the hard splint region is achieved either by application, i. powdered sprinkling, a hard version of a plastic and cold polymerization applied by addition of a liquid monomeric plastic hard version or injected by post-processing of the cuvette shape by creating an additional ejection space.
  • the outer hard rail area can be brought by grinding, polishing or other processing measures in a well-rounded shape.
  • the rail 13, as shown schematically in FIG. 5, is inserted, for example with the aid of an articulator, into the plaster tooth model 12 in order to check the fit and the seat and to be able to carry out fine mechanical work.
  • Fig. 6 the structure of the dental splint 14 according to the invention is shown in a schematic sectional view.
  • the tooth 16 is in
  • the tooth 16 is enclosed by the soft rail area 17, and this in turn is surrounded by the hard rail area 18.
  • the hard rail area 18 essentially determines the shape of the toothed rail 14 and the soft rail area 17 surrounds the tooth 16 and serves to fix the rail by transmitting contact forces.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Plastic & Reconstructive Surgery (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)
  • Dental Prosthetics (AREA)

Abstract

L'invention concerne un procédé de production d'un appareil orthodontique présentant des zones souples et des zones dures. Les matériaux des deux zones présentent la même base de matière plastique. La zone souple (17) de l'appareil (01, 13, 14) est obtenue à partir d'une formulation souple, élastique renfermant au moins un monomère ou un oligomère. Cette zone de l'appareil est liée par un processus de polymérisation et sans utilisation d'un agent adhésif supplémentaire, avec une zone dure à stabilité dimensionnelle (18). Le monomère ou l'oligomère présente la propriété de pouvoir se dissoudre dans au moins un polymère de la zone dure de l'appareil, en particulier dans son propre polymère. L'appareil orthodontique présente, du fait de la zone souple, une adaptation de forme remarquable et est confortable à porter. Il présente en outre, du fait de sa réalisation en une seule pièce, une durée de vie élevée. De plus, l'appareil orthodontique est réparable et peut être coloré à volonté, du fait qu'il est réalisé en un matériau ayant la même base de matière plastique.
PCT/DE2007/000772 2006-05-10 2007-04-30 Procédé de production d'un appareil orthodontique présentant des zones souples et des zones dures WO2007128270A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006021955A DE102006021955A1 (de) 2006-05-10 2006-05-10 Verfahren zur Herstellung einer Zahnschiene mit weichen und harten Schienenbereichen
DE102006021955.4 2006-05-10

Publications (2)

Publication Number Publication Date
WO2007128270A2 true WO2007128270A2 (fr) 2007-11-15
WO2007128270A3 WO2007128270A3 (fr) 2008-10-09

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DE (1) DE102006021955A1 (fr)
WO (1) WO2007128270A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010037075B3 (de) * 2010-08-19 2012-01-26 Steffen G. Tschackert Zahnschiene, Verfahren zu deren Herstellung und Verwendung
CN112137742A (zh) * 2020-10-22 2020-12-29 深圳市宝生堂生物科技有限公司 一种正畸矫治器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008025461A1 (de) * 2008-05-28 2009-12-03 Raimund Mössmer Vorrichtung zum Trainieren der Lippen- und Gesichtsmuskulatur
DE202010000436U1 (de) 2010-03-22 2011-05-05 Röwekamp, Georg Friedrich, Dr.med. Bissschiene
DE202013101234U1 (de) 2013-03-22 2014-03-24 Claus-Hinrich Beckmann Bissschiene

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US4370129A (en) * 1981-06-18 1983-01-25 Professional Positioners, Inc. Tooth positioner with harder areas
DE4020647A1 (de) * 1990-06-29 1992-01-02 Horst Ludwigs Geraet zur zahnregulierung
WO1993017631A1 (fr) * 1992-03-11 1993-09-16 Watson Sherman L Dispositif dentaire interocclusal tendre et faisant ressort
WO2001080764A1 (fr) * 2000-04-25 2001-11-01 Align Technology, Inc. Systemes et procedes pour modifier les applications du module d'elasticite

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DE19808593A1 (de) * 1998-02-28 1999-09-02 Scheu Dental Mundvorhofplatte aus Kunststoff und Verfahren zu deren Herstellung
GB0213584D0 (en) * 2002-06-13 2002-07-24 Mohindra N K Appliance for reducing facial aging
US7354270B2 (en) * 2003-12-22 2008-04-08 Align Technology, Inc. Surgical dental appliance
EP1871274B1 (fr) * 2005-03-07 2019-05-08 Align Technology, Inc. Gouttière dentaire ridée

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370129A (en) * 1981-06-18 1983-01-25 Professional Positioners, Inc. Tooth positioner with harder areas
DE4020647A1 (de) * 1990-06-29 1992-01-02 Horst Ludwigs Geraet zur zahnregulierung
WO1993017631A1 (fr) * 1992-03-11 1993-09-16 Watson Sherman L Dispositif dentaire interocclusal tendre et faisant ressort
WO2001080764A1 (fr) * 2000-04-25 2001-11-01 Align Technology, Inc. Systemes et procedes pour modifier les applications du module d'elasticite

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010037075B3 (de) * 2010-08-19 2012-01-26 Steffen G. Tschackert Zahnschiene, Verfahren zu deren Herstellung und Verwendung
US9387053B2 (en) 2010-08-19 2016-07-12 Steffen G. Tschackert Dental splint made of two plastics with different degrees of hardness
CN112137742A (zh) * 2020-10-22 2020-12-29 深圳市宝生堂生物科技有限公司 一种正畸矫治器

Also Published As

Publication number Publication date
DE102006021955A1 (de) 2007-11-15
WO2007128270A3 (fr) 2008-10-09

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