WO2019020163A1 - Outil pour instrument de préparation dentaire et dispositif de guidage pour guider l'outil et procédé associé - Google Patents

Outil pour instrument de préparation dentaire et dispositif de guidage pour guider l'outil et procédé associé Download PDF

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Publication number
WO2019020163A1
WO2019020163A1 PCT/EP2017/068641 EP2017068641W WO2019020163A1 WO 2019020163 A1 WO2019020163 A1 WO 2019020163A1 EP 2017068641 W EP2017068641 W EP 2017068641W WO 2019020163 A1 WO2019020163 A1 WO 2019020163A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
guide
guide device
tooth
dental
Prior art date
Application number
PCT/EP2017/068641
Other languages
German (de)
English (en)
Inventor
Sven HANGERT
Original Assignee
Hangert Sven
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 Hangert Sven filed Critical Hangert Sven
Priority to PCT/EP2017/068641 priority Critical patent/WO2019020163A1/fr
Publication of WO2019020163A1 publication Critical patent/WO2019020163A1/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
    • A61C3/00—Dental tools or instruments
    • A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/082—Positioning or guiding, e.g. of drills

Definitions

  • the invention relates to a tool, in particular a drilling, milling and / or grinding tool, for a dental preparation instrument, for example a dental turbine or a dental angle piece, and a guide device for guiding such a tool.
  • a natural tooth consists of a tooth crown, the tooth neck and the tooth root, whereby in a healthy tooth only the crown of the natural tooth emerges visibly from the gum.
  • damage to the natural tooth crown for example, by mechanical effects, but also by caries, it is often necessary to replace the natural tooth crown with an artificial crown.
  • the natural tooth crown so that it is prepared for the incorporation of an artificial crown.
  • the natural tooth crown is ground, for example, to about one millimeter below the gingival margin, ie subgingival, cylindrical or slightly conical round. This creates a step in the area of the gums. Alternatively, this step can also be applied above the gingival margin, ie supragingival, or at the same height as the gingival margin, ie transgingival.
  • the occlusal surface is abraded so far that an artificial crown can be placed on the prepared tooth crown, so that sufficient There is room for a counterbite.
  • the thickness of the area which is ground off of the natural tooth crown directly dependent on the required material thickness of the dental prosthesis material to be used.
  • materials are, for example, gold, zirconium, ceramic or plastic.
  • the prepared natural tooth crown which is also called tooth stump after preparation, is molded with an impression compound, in which case a dental technician can produce an artificial crown with the aid of this impression.
  • a model for example made of plaster or plastic, produced, which is still being processed in order to make the crown in the next step.
  • the artificial crown After the artificial crown has been manufactured, it can be placed on the stump of the tooth in the next step and fastened to the tooth stump with a fixing cement. This step is also called incorporation.
  • the inaccuracy of the artificial tooth crown in particular in the area of the above-mentioned step, can lead to a luting cement being washed out between the artificial crown and the tooth stump and allowing bacteria to penetrate into the vacated space. These bacteria often lead to the attack of the tooth stump, so that this unnoticed under the artificial tooth crown may have a new caries attack, leading to the complete destruction of the natural tooth. Furthermore, inaccurately seated patients often experience pain when exposed to external influences from cold, hot, sweet or sour foods or drinks.
  • the invention relates on the one hand a tool for a dental turbine and on the other hand, a guide device for guiding the tool.
  • the tool according to the invention is preferably a drilling tool, a milling tool, a grinding tool or a combination thereof.
  • the tool has a shaft.
  • the shaft includes a first end and a second end.
  • the first end then comprises a tool portion, which preferably serves for drilling and / or grinding.
  • the tool portion is shaped accordingly and has on its surface grinding, such as diamond grinding on.
  • the second end of the shank forms a receiving area which is adapted to be connected to a turbine, which is also called a dental drill.
  • the tool is rotatable about a rotation axis, wherein this rotation axis preferably extends in the middle of the shank. For putting the tool into rotation, the receiving area is thus preferably connected to a turbine and the rotational movement is generated by the turbine.
  • the tool has at least one projection which is arranged between the first end and the second end on the shaft.
  • the projection is rotationally symmetrical metric and thus runs around the shaft.
  • the rotationally symmetrical projection thus has an axis of symmetry which corresponds to the axis of rotation of the shaft.
  • the projection can also be referred to as a thickening of the shaft.
  • the invention relates to a guide device, in particular for guiding the aforementioned tool according to the invention.
  • the guide device comprises a contact portion and a treatment portion.
  • the contact portion is adapted to be contacted and / or connected to at least one contact area in the oral cavity of a patient.
  • a connection is to be understood here preferably as releasable connection.
  • the contact portion is therefore shaped so that it can pinch parts of the contact area.
  • the contact area has a plurality of teeth which are not to be treated
  • the contact section can preferably be shaped in such a way that it clamps the teeth which are not to be treated and is thereby connected to the contact area, ie the teeth.
  • the treatment section has a guide which serves to guide a tool rotating about a rotation axis, in particular the aforementioned tool according to the invention, along a guide direction.
  • the guide direction preferably has an angle which is not equal to zero degrees with respect to the rotational axis of the tool.
  • the contact portion has a shape which is adapted to a predefined shape of a contact region of a patient to be treated.
  • the treatment section has a shape which is adapted to a predetermined artificial tooth crown for a tooth of the patient to be treated.
  • the guide apparatus which preferably has an individual contact portion and / or an individual treatment portion corresponding to a contact area in the oral cavity of a patient to be treated and a predetermined artificial dental crown for a patient's tooth to be treated, it is possible to first predetermine the artificial dental crown and therefore to manufacture an artificial tooth crown. Only in the following step, thanks to the guiding device and the tool, a tooth of a patient to be treated has to be prepared. Immediately after preparation, the prefabricated artificial dental crown can then be placed on.
  • the treatment portion in dependence of the predetermined artificial tooth crown is very precisely adapted in view of its shape and then a guided guide of a tool for preparing the tooth to be treated is only possible depending on the treatment section, a particularly precise preparation of the tooth is possible, so that a step In the tooth, which is produced by the grinding process or milling process, can be adapted as far as possible exactly to the tooth crown.
  • the washing out of a connecting material between the tooth crown and the prepared tooth can be counteracted as far as possible.
  • a higher accuracy of the dental prosthesis and lower treatment times are made possible. Further, a smaller physical injury to the patient, even by only minimal to be ground teeth, needed.
  • the guide of the treatment section has a channel extending in the guide direction.
  • This channel corresponds to a breakthrough by the guide device in the treatment section, so that a tool for grinding can be passed through this breakthrough, wherein the channel is bounded by two walls, which allow for insertion of the tool guiding the tool between the walls in the guide direction.
  • the opposite walls each have mutually opposite guide channels.
  • the guide channels run along the guide direction.
  • the troughs can also be called Frockaus traditions.
  • the rotationally symmetrical projection of the tool can be guided in these guide channels in such a way that movement of the tool in the longitudinal direction of its axis of rotation is prevented by the guide channels.
  • a drilling or grinding depth can thus be limited by the guide channels.
  • the above-mentioned step is therefore exactly adaptable to the predetermined artificial crown.
  • the opposite guide channels have an axisymmetric cross section.
  • the at least one rotationally symmetrical projection is plate-shaped, rotationally ellipsoid-shaped or spherical, the axis of symmetry of the projection being identical to the axis of rotation of the tool.
  • the rotationally symmetrical projection corresponds to a spherical shape.
  • the guide device of the axisymmetric cross section of the opposite guide grooves is formed as a circle, which preferably has a diameter which substantially corresponds to the diameter of a spherical projection of a tool to be guided. The diameter of the guide channel is thus predetermined, preferably by the diameter of a tool with a projection.
  • the tool can rotate unrestricted about its axis of rotation, while the rotationally symmetrical projection prevents movement of the tool in the longitudinal direction to the axis of rotation.
  • the guide device comprises the opposite guide grooves, in which the rotationally symmetrical projection of the tool is prevented from moving in the longitudinal direction to the axis of rotation.
  • the guide channels run in the guide direction, the tool can be freely displaced in the guide direction.
  • the walls above and / or below the guide channels on opposite parallel surfaces.
  • the parallel surfaces allow in addition to guiding the rotationally symmetrical projection of the tool in the guide channels additionally guiding the shaft between see the parallel surfaces, so that the tool can be performed even better.
  • tilting the walls can thus be an oblique machining of the tooth to be treated, so that a conical shape of the tooth stump can be obtained.
  • the surfaces of the opposite walls for this purpose substantially at a constant distance, in particular at opposite points on.
  • This distance preferably corresponds substantially to the diameter of the shaft of a tool to be guided.
  • the tool can only lead in the direction of the course of the surfaces and is thus limited to a movement in the guide direction.
  • the latter has two rotationally symmetrical projections, which are preferably arranged at a distance from one another on the shaft.
  • the walls of the guide each have two parallel guide channels, each of the guide channels of one wall being opposite to a guide channel of the other wall.
  • the tool can be guided by the guide device only along the guide direction and has no further degrees of freedom. A particularly simple and secure guidance is thus possible.
  • the tool can thus be accurately guided in all three dimensions.
  • the rotationally symmetrical projections have a spacing which is dependent on the type of tool section.
  • a particular milling tool has protrusions at a distance that is different than the spacing of the protrusions in a grinding tool.
  • the projections have diameters that depend on the nature of the tool section. This also makes it possible to avoid confusing a tool.
  • the shaft and the rotationally symmetrical projection are made in one piece, that is to say in one piece.
  • the guide has an insertion region for insertion and / or removal of a tool into the channel.
  • the insertion region preferably has an area with at least one diameter that is equal to or greater than the maximum distance in the region of the guide channels.
  • the channel does not have to terminate at an outer portion of the guide device to insert the tool, but through the insertion portion, the area bounded by the guides may begin in the middle of the guide device, resulting in a more stable design of the guide device.
  • the guide device is made of plastic, in particular using a negative mold, which is produced by means of an impression compound, or a 3D printer.
  • the guide device can thus be easily and quickly produced.
  • the invention relates to a method for producing a guide device according to one of the aforementioned embodiments.
  • a guiding device according to a previously mentioned embodiment is produced as a function of a three-dimensional image of at least one area of an oral cavity around a tooth to be treated.
  • This three-dimensional image is preferably a working model made with an impression material or an optical image of the region that was preferably previously produced with a 3D scanner.
  • the guide device is produced as a function of this three-dimensional image by a 3D printer.
  • the shape for an artificial crown of a tooth to be treated is previously predetermined and a treatment portion of the guide device is generated depending on the shape of the artificial tooth crown, in particular the shape of a recess of the crown for connection to the tooth stump of the tooth to be treated.
  • the invention relates to a method for preparing a grinding process and / or milling process of a tooth to be treated, this method comprising contacting or connecting a contact portion of a guide device according to one of the aforementioned embodiments with a contact area in the oral cavity of a patient.
  • Fig. 1 shows a tool for a dental preparation instrument, such as a dental
  • Turbine or a dental angle piece according to a first embodiment
  • FIG. 2 shows another embodiment of a tool
  • Fig. 3 shows a third embodiment of a tool
  • Fig. 5 is a guide device according to an embodiment in plan view
  • Fig. 6 shows another guide device according to an embodiment in the
  • FIG. 10 shows an insertion region of a further guide device in the sectional view.
  • the tool 10 includes a shaft 12 that includes a first end 14 and a second end 16. At the first end 14 is a tool portion 18 which is formed according to this embodiment as a grinding tool. For this purpose, the tool section 18 is provided with grinding wheels 20. Between the first end 14 and the second end 16, the shaft 12 has a rotationally symmetrical projection 22. This projection 22 is here dish-shaped, thus corresponds to a disc.
  • the tool 10 has at its second end 16 a receiving area 24 with which the tool 10 can be inserted into the receptacle of a dental preparation instrument, such as a dental turbine or a dental angle piece. The turbine then serves to set the tool 10 in rotation about the axis of rotation 26.
  • the tool 10 is therefore an axisymmetric body, its axis of symmetry corresponding to the axis of rotation 26.
  • FIG. 2 shows a further embodiment of a tool 10 according to the invention.
  • the same reference numbers here and in the other figures designate the same features, optionally in different embodiments.
  • Fig. 2 again shows the first end 14 and second end 16 of a shaft 12, wherein the first end 14 a tool portion 18 and the second end 16 a receiving portion 24 for Recording in a turbine forms.
  • the shaft 12 in turn has a projection 22, which is formed in this embodiment as a ball.
  • FIG. 3 shows a further embodiment of the tool 10, which now has between the first end 14 and the second end 16 of the shaft 12 has two projections 22 which are each formed here as a ball.
  • the tools 10 shown in FIGS. 2 and 3 are also rotationally symmetrical bodies.
  • Fig. 4 shows a side view of a guide device 40, which is made for example with a 3D printer.
  • the guide device 40 is mounted in a region 42 of an oral cavity of a patient.
  • the guide device 40 on a contact portion 44, which is in response to a patient to be treated, namely in the present case adapted to the shape of a plurality of teeth 46 of the patient.
  • the contact portion 44 also has connecting elements 48 to securely connect the guide device 40 to a contact region 49 formed here by all the illustrated teeth 46.
  • the guide device 40 comprises a treatment section 50 which is not discernible in detail in this side view and will therefore be described in detail in the following figures.
  • the treatment section 50 is located above a tooth 52 to be treated, which is already shown here as a prepared tooth for better distinction from the other teeth 46. That is, the tooth 52 to be treated has already been conically ground using the guide device 40 to incorporate a crown.
  • FIG. 5 shows a guide device 40, for example from FIG. 3, in plan view.
  • the guide device 40 has a guide 54 which serves to guide a tool 10.
  • the guide 54 has two opposite walls 56, 58, which form parallel surfaces to each other and from the top 60, which can be seen here in plan view, to the bottom limit an opening by the guide device 40.
  • the walls 56, 58 have a substantially constant distance 62 from each other except for a region in which guide channels run and which will be described later with reference to FIG. 7.
  • the distance 62 corresponds essentially to a diameter of the tool 10 in the region of the shank 12 above and below the projection 22.
  • the guide device 40 has two insertion regions 64. These insertion regions 64 are used for insertion and / or removal of a tool 10.
  • insertion regions 64 are also possible from the side of the guide device 40. Accordingly, if, for example, the tooth 52 to be treated of FIG. 4 is to be ground in accordance with the form shown in FIG. 4, then a tool 10 is introduced, for example, into the insertion region 64 shown on the left and guided along the guide 54 and guided through the guide 54 in the lead-in area 64, which is shown on the right, taken out again. The tool 10 is thus guided in the guide direction 66. Since only one half of a tooth 52 to be treated has been ground so now, a further guide device 40 is required, which is shown in Fig. 6. Accordingly, therefore, after the guide device 40 shown in FIG.
  • FIGS. 5 and 6 essentially show a rectangular contour of the guide device 40, whereby, depending on the shape of the contact region 49, this can of course also be curved or has a completely different contour.
  • FIG. 7 now shows the section through an area of the guide 54 between the insertion areas 64.
  • the guide 54 is shown here as a sectional illustration and a tool 10 in the guide 54 is shown for better explanation.
  • the tool 10 is thus guided on the one hand through the walls 56, 58, which are substantially parallel to each other, with additional guide grooves 70 are provided, in which the projection 22 of the shaft 12 of the tool 10 is guided.
  • the guide grooves 70 thus each form a recess or recess in the sides or walls 56, 58.
  • the tool 10 is thus movable only in dependence of the guide 54.
  • a movement along the longitudinal direction 72 of the rotation axis 26 is prevented by the guide grooves 70 and the projection 22.
  • the shaft 12 is further prevented from turning to the sides.
  • a guided Treating a tooth 52 to be treated is thus possible.
  • the guide grooves 70 a channel 71 is described.
  • the two walls 56, 58 comprise above and below the guide grooves 70 surfaces 76, 78 which are parallel to each other.
  • the guide device 40 is so far from the top 60 that the projection 22 of the tool in the channel 71, which is formed by the guide grooves 70, can be introduced.
  • FIG. 9 shows a further example of a guide device 40 according to a further exemplary embodiment as well as a tool 10 according to the exemplary embodiment from FIG. 3.
  • the tool 10 is inserted into the region of the guide 54, again showing the section through the region of the guide 54 ,
  • the tool 10 accordingly has two projections 22, which are each spherical and between two pairs of guide grooves 70, each having mutually opposite guide grooves 70, are guided.
  • two channels 71 are each provided for one of the projections 22.
  • FIG. 10 shows an insertion region 64 for the tool 10 according to the exemplary embodiment in FIG. 3 with two projections 22.

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 outil (10), en particulier un outil de perçage, de fraisage et/ou de meulage, pour un instrument de préparation dentaire, comme une turbine dentaire ou une pièce coudée dentaire. Ledit outil (10) comprend une tige (12) dotée d'une première extrémité (14) qui présente une partie outil (18), en particulier pour meuler, fraiser et/ou percer, et une seconde extrémité (16) qui constitue une zone de réception (24) ou est reliée à une zone de réception (24), de manière à être relié à un instrument de préparation dentaire et à être entraîné en rotation autour d'un axe de rotation (26) par l'instrument de préparation. La tige (12) présente entre la première extrémité (14) et la seconde extrémité (16) au moins une partie saillante (22) à symétrie de rotation. L'invention concerne en outre un dispositif de guidage (40) permettant de guider un outil (10) ainsi qu'un procédé de fabrication d'un dispositif de guidage (40).
PCT/EP2017/068641 2017-07-24 2017-07-24 Outil pour instrument de préparation dentaire et dispositif de guidage pour guider l'outil et procédé associé WO2019020163A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/068641 WO2019020163A1 (fr) 2017-07-24 2017-07-24 Outil pour instrument de préparation dentaire et dispositif de guidage pour guider l'outil et procédé associé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/068641 WO2019020163A1 (fr) 2017-07-24 2017-07-24 Outil pour instrument de préparation dentaire et dispositif de guidage pour guider l'outil et procédé associé

Publications (1)

Publication Number Publication Date
WO2019020163A1 true WO2019020163A1 (fr) 2019-01-31

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PCT/EP2017/068641 WO2019020163A1 (fr) 2017-07-24 2017-07-24 Outil pour instrument de préparation dentaire et dispositif de guidage pour guider l'outil et procédé associé

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005217A1 (de) * 2007-01-29 2008-07-31 Römer, Olaf Abtragwerkzeug
DE202008012049U1 (de) * 2008-09-10 2009-02-19 Gäßler Zahntechnik GmbH Zahnmedizinisches Bohrführungssystem
DE102012003811A1 (de) * 2012-02-27 2013-08-29 Peter NEUMEIER Zahntechnisch-Zahnärztliches Verfahren und Zahntechnisch-Zahnärztliche Vorrichtung
US20130230827A1 (en) * 2010-11-17 2013-09-05 Kod, Inc. Tooth preparation guide device and method of preparing tooth for dental prosthesis

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005217A1 (de) * 2007-01-29 2008-07-31 Römer, Olaf Abtragwerkzeug
DE202008012049U1 (de) * 2008-09-10 2009-02-19 Gäßler Zahntechnik GmbH Zahnmedizinisches Bohrführungssystem
US20130230827A1 (en) * 2010-11-17 2013-09-05 Kod, Inc. Tooth preparation guide device and method of preparing tooth for dental prosthesis
DE102012003811A1 (de) * 2012-02-27 2013-08-29 Peter NEUMEIER Zahntechnisch-Zahnärztliches Verfahren und Zahntechnisch-Zahnärztliche Vorrichtung

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