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WO1997030654A1 - Prothese dentaire implantable, butees correspondantes et procede de production desdites butees - Google Patents

Prothese dentaire implantable, butees correspondantes et procede de production desdites butees Download PDF

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Publication number
WO1997030654A1
WO1997030654A1 PCT/EP1997/000871 EP9700871W WO9730654A1 WO 1997030654 A1 WO1997030654 A1 WO 1997030654A1 EP 9700871 W EP9700871 W EP 9700871W WO 9730654 A1 WO9730654 A1 WO 9730654A1
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WO
WIPO (PCT)
Prior art keywords
abutment
implant
ceramic
ceramic material
shape
Prior art date
Application number
PCT/EP1997/000871
Other languages
German (de)
English (en)
Inventor
Arnold Wohlwend
Original Assignee
Arnold Wohlwend
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 Arnold Wohlwend filed Critical Arnold Wohlwend
Priority to AU17945/97A priority Critical patent/AU1794597A/en
Publication of WO1997030654A1 publication Critical patent/WO1997030654A1/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
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0012—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
    • 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
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • 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
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0006—Production methods
    • A61C13/0009—Production methods using a copying machine
    • 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
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • 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
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/0077—Connecting the upper structure to the implant, e.g. bridging bars with shape following the gingival surface or the bone surface
    • 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
    • A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
    • 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
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0022—Blanks or green, unfinished dental restoration parts
    • 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
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0054—Connecting devices for joining an upper structure with an implant member, e.g. spacers having a cylindrical implant connecting part
    • 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
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0059—Connecting devices for joining an upper structure with an implant member, e.g. spacers with additional friction enhancing means
    • 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
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/006—Connecting devices for joining an upper structure with an implant member, e.g. spacers with polygonal positional means, e.g. hexagonal or octagonal
    • 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
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0069—Connecting devices for joining an upper structure with an implant member, e.g. spacers tapered or conical connection

Definitions

  • the present invention relates to an implantable
  • Implant systems Dental prosthesis systems used today, hereinafter referred to as implant systems, essentially consist of two parts: the implant itself, which is surgically inserted into the upper or lower jaw under the gums, in particular screwed in, there for 3 -6 months to achieve healing (osseointegration); and the so-called abutment, which connects the so-called implant shoulder to the artificial tooth crown attached to the abutment.
  • the gums After the healing phase of the implant, the gums are opened surgically to screw the abutment onto the implant. The crown is then attached to the abutment either by screwing or gluing * :.
  • titanium has in any case established itself as the implant material.
  • the dark color of the titanium implant - because the implant is surrounded by opaque bones - is not perceived as a nuisance, in contrast to that of a titanium abutment. This results in discoloration of the gingiva (gums), making it difficult to match the color to the remaining teeth, and the implant head generally has a different diameter from the natural tooth.
  • the implant shoulder and the tooth root to be imitated at the level of their gingival passage have different cross-sections in dimension and shape. If, for example, a missing, upper, central incisor is replaced by a single tooth implant, the circular, one Implant shoulder having a diameter of approximately four millimeters may be transferred to a more triangular, larger cross-sectional shape at the gingival passage point.
  • Another solution is the grinding of a conventional abutment made of pure titanium, with the dental technician individually preparing the titanium abutment so that the preparation limit is adjusted to the arcade-shaped course of the gum.
  • This makes it possible to achieve a uniform subgmgival crown edge course of approximately 1.0 to 1.5 mm depth, which significantly facilitates the subsequent removal of residual cement after the crown has been finally cemented.
  • a crown framework made of a high-gold alloy is poured over this customized titanium abutment and then veneered with ceramic. This procedure facilitates the definitive cementation, but it requires the correct implant position, since the necessary corrections to achieve an optimal, general aesthetic are only possible to a limited extent. In the case of a thin gingiva, however, there is a risk of metallic shimmering through.
  • “Correct implant position” means positioning the implant at the location of a tooth root. Positioning the implant “incorrectly” will be an option or should be preferred if, for example, the bone punch is firmer next to the tooth root to be imitated or if there is more space available.
  • Such aluminum oxide abutments are generally manufactured in such a way that aluminum oxide powder is pressed into shape under pressure and thus compacted. Porosities in the compacted mass are inevitable, and due to the resulting brittleness of the compacted mass, minimum and also maximum wall thicknesses are essential in order to ensure the stability of the essentially hollow cylindrical abutment. Incorrectly placed implants, however, require an asymmetrical wall thickness shape of the abutment to compensate for the position of the implant that is decentred with respect to the tooth root to be imitated. Alumina abutments are therefore only needed for a few, optimally placed implants: they can be used. It is also not certain whether
  • Abutments made of aluminum oxide can withstand the considerable forces that occur when biting and chewing.
  • the abutment is fastened to the implant implanted - in particular screwed - in the jawbone via the fastening screw, a hexagon socket or octagon socket opening being generally provided in the abutment, so that there is a counterhold when the fastening screw is tightened.
  • a hollow pin with a corresponding hexagon or octagonal shape is inserted into this opening, the hollow pin receiving the screwdriver. While tightening the fastening screw (force of more than 30 N), this hollow pin serves as a rotation lock, so that Implant is not moved out of the bone when the abutment is screwed on.
  • This hexagon socket or octagon opening with its inside diameter that goes beyond the screwdriver required to insert the screwdriver, means that the outside diameter of the abutment has to be larger in order to achieve a sufficient minimum wall thickness that ensures stability.
  • aluminum oxide is X-ray translucent, it is difficult to check the fit in the patient's mouth. Like all ceramic materials, aluminum oxide is difficult to grind, which makes the post-processing necessary, especially if the positioning is incorrect.
  • the object of the present invention is to overcome the above-mentioned problems inherent in the prior art, which is made possible by an implant system in which the characterizing features of claim 1 are realized or by an abutment with the characterizing features of the application. Proverb 6, as well as by methods for producing an abutment for such an implant system, in which the characterizing features of claims 8, 16 or 18 are realized.
  • Jaw shows an abutment for correctly placed implants in plan and elevation
  • FIG 3 shows an elevation of a prefabricated abutment for
  • Abutments in a copy milling machine shows a schematic illustration of a computer-assisted production of an abutment
  • FIGS. 15a to 15d show a schematic illustration of a computer-assisted production of external abutment forms.
  • FIG. 1 An implant system is shown in FIG. 1, wherein an implant 27 made of titanium, if appropriate, is introduced into a jawbone 26 - screwed in if necessary.
  • An abutment 9 is connected to the implant 27 via a fastening screw 29, which is screwed into the implant 27 through an opening 30 m provided in the abutment with an internally threaded screw opening 31.
  • the abutment 9 is seated on the upper locking surface of the implant 27, the so-called implant shoulder 32.
  • the abutment 9 is essentially hollow-cylindrical in shape, with a web-like projection 33 in the interior of the opening 30 serving as a stop for the head of the fastening screw 29.
  • the abutment 9 is in the region adjacent to the implant shoulder 32 ground in a ter-shaped manner, as a result of which implant misalignments can be corrected and the transition from the round cross-sectional shape to the more triangular of the natural tooth can be formed.
  • the abutment 9 is prepared on the buccai and incisal side in accordance with the evaluated crown shape, and the crown 11 is placed on it.
  • zirconium partially stabilized with yttrium oxide not only has a high bending strength value between 900 and 1300 Pa and a low Young's modulus of elasticity of approx. 200 kPa, but also what is particularly important , a high toughness value with a fracture toughness of approx. 9-10 MPa * m 1/2 .
  • the high value of the fracture toughness can be explained by the ability of the tetragonal (TZP) or partially (PSZ) stabilized zirconium oxide, which itself can repair faulty, superficial defects through a volume-increasing phase transformation in stress areas (eg crack tips) can.
  • the metastable tetragonal phase of the zirconium oxide m is converted into the thermodynamically stable monoclear phase. This effect can be achieved through the
  • a high-purity zirconium oxide powder to which alkaline earth oxides, such as MgO and CaO, and / or rare earth oxides, such as Y2O3, are admixed, which enable the tetragonal or cubic phase to be stabilized at room temperature.
  • alkaline earth oxides such as MgO and CaO
  • rare earth oxides such as Y2O3
  • the zirconium oxide thus far exceeds the key figures for the mechanical strength of the high-purity, densely sintered aluminum oxide, which has a bending strength in the range of 500-600 Pa, and one with 3-4.5 MPa / m 1/2 only half as much great fracture toughness achieved.
  • the excellent physical properties for the zirconium oxide ceramic allow the abutment to be ground individually, regardless of the minimum dimensions, which allows the production of aesthetically high-quality reconstructions on single tooth implants. Clinical manufacture is facilitated by grinding the abutments in the dental laboratory.
  • zirconium oxide ceramic instead of the zirconium oxide ceramic described above, other biocompatible ceramics or alloys can be used whose bending strength values are above 700 MPa and whose fracture toughness is at least 6 MPa-m / 2 . Alloys of Al2O3 ⁇ ZrO2 can thus be used, strength values of 1000 MPa being achievable, for example, with a proportion of 15 vol% ZrO2.
  • Siss ⁇ or TiC or fiber-reinforced ceramics, such as SiC fiber, SiC whiskers, Al 2 O 3 SiC fibers, can also be provided.
  • the materials listed here are purely exemplary; what is essential are the physical properties suitable for these materials, which are given by the lower limits listed above.
  • oxide ceramic or “zirconium oxide” is to be understood below as meaning any ceramic or ceramic combination having the above properties and having the required physical properties.
  • the poor grindability of oxide ceramics is indeed to be regarded as a disadvantage if the preparation of ceramic spacer sleeves is carried out directly in the patient's mouth, since this is extremely tedious both for the patient and for the dentist.
  • the treatment time for the preparation an oxide ceramic abutment requires 2-3 times the time compared to the preparation of a natural tooth.
  • the use of diamond sintered discs for coarse preparation can be done quickly and precisely.
  • the poor grindability of the Zr ⁇ 2 abutment can also be completely compensated for by the use of an inter-sintered abutment type (see below). Such abutments can also be ideally processed in the laboratory by the dental technician.
  • the joint 28 is designed as an elastic intermediate layer.
  • the hard composite, glass ionomer or phosphate cement is, for example, by a cement on silicone or composite Base replaced, which contain soft plastic fillers instead of glass fillers. Cements based on composites with elastic polymeric materials as additives or with reversible thermoplastic constituents are also suitable for this. Such a cement is elastic and dampens
  • the surface of the prepared abutment can be covered with a plastic jacket, which becomes effective as a damping intermediate layer between the abutment and the crown part.
  • the joint 28 serves as a buffer zone.
  • zirconium oxide abutments Due to their excellent physical properties, zirconium oxide abutments also lend themselves to complex implant situations, since problems are not to be expected either with extremely thin, a few tenths of a millimeter or with thick side walls, and fractures or abrasion neither during dental processing nor during fixation of the abutment to the implant.
  • the dental technician is provided with various pre-made abutment shapes (FIGS. 2, 3, 4a, 4b and 4c) ), which reduce grinding work to a minimum and make it possible to solve every implant situation in a rational manner.
  • Correctly operated diagnostics simplify the correct selection of the appropriate abutment shape.
  • Abutment forms as shown in FIGS. 2 and 3, are indicated if the implant is set correctly and only minimal preparations are necessary.
  • a roughly pre-shaped abutment 9a with milled side surfaces 5 or a more complex spatial relationship, ie larger and wider interdental spaces, adapted abutment 9b can be used.
  • Abutment forms 9c, 9d and 9f can be used if the implant is not correctly placed.
  • Aesthetic grinding corrections are possible, because not only the abutment body, the side walls of which are substantially thicker than, for example, the abutments of FIGS. 2 and 3, but also the abutment neck can be modified and prepared in any shape as required become.
  • This form of abutment has also been developed for the indication in the molar area. This is particularly clear from FIG. 4c, the left part of FIG.
  • FIG. 4c representing an asymmetrical basic shape for an abutment 9f, in which - in order to compensate for the incorrect, decentered positioning of the implant 27 - a particularly large and also one particularly small wall thickness is realized. This makes it possible - as the right part of FIG. 4c shows - to still correctly place the prosthetic reconstruction 11.
  • inter-sintered and / or abutment forms similar to those shown in FIGS. 4a and 4b, are provided, which are only after after the clinical trial to be sintered into high-quality zirconium material
  • This shape is also advantageous for the direct veneering of the abutment, because it enables correct ceramic support.
  • FIG. 5b shows a special shape of the contact surface 43 of an abutment 9g.
  • 43 projections 44 are provided on this contact surface, which are pressed against the implant shoulder 32 when the fastening screw 29 is tightened and - since the material of the implant, for example titanium, is softer than the material of the abutment 9g according to the invention - engage in it .
  • This achieves an excellent seal between the abutment and the implant. Bacterial flow due to leaks is prevented, which could otherwise lead to inflammation and would jeopardize the success of the implant system.
  • These projections 44 can be annular, for example, and can be arranged concentrically around the opening 30, with slightly rounded edges, thus representing a type of labyrinth seal.
  • the contouring can be correctly adjusted to natural teeth, with which buccal gingival retraction can be avoided.
  • the cross-sectional situation of the tooth root and tooth neck area at the gingival passage point can be designed correctly.
  • An incorrect implant position or longitudinal axis can be improved.
  • the subgingival preparation tion limit can be properly designed taking into account the arcade-shaped Gmgiva course in the approximal area.
  • zirconium oxide powder cannot be pressed directly into a mold, as in the production of aluminum oxide ceramic, since, as already mentioned, this shown, would require extremely high pressures.
  • zirconium oxide produced in this way would not be biocompatible.
  • Zirconium oxide powder or chips are pressed isostatically onto a mandrel (not shown), so that an enlarged tube shape 34 is created (FIG. 6a). The enlargement results from the fact that during the subsequent sintering process the material shrinks by a certain amount.
  • This tube shape 34 is shortened to the desired length in the so-called “green”, not sintered, state and bevelled on two sides, approximately in a wedge shape (FIG. 6b).
  • a depression 35 is then formed on the side facing the implant (FIG. 6c), which is formed into a hexagon socket using a special instrument 41 (FIG. 6d), preferably with an ultrasound device (other forms of engagement are also possible) , which comes into engagement with a corresponding external hexagon 36 on the implant shoulder (see FIGS. 1 and 5) and fixes the relative position of the abutment on the implant.
  • a special instrument 41 can be seen from FIG.
  • abutment form 9 'obtained in accordance with the work steps described above with reference to FIGS. 6a to 6e and the chips are now presintered, for zirconium oxide ceramic at approximately 1180 ° C. If necessary, abutment mold 9 'and chips can also be worked out from a pre-sintered press.
  • the processing of ceramics in the so-called green stage i.e. in the non-pre-sintered state, as well as the processing in the semi-sintered (pre-sintered) state, has the advantage over the methods that mill the desired shapes directly from the finished sintered work block that fewer micro cracks are incorporated into the surface when processing the ceramic and that the naturally high tool wear, which is given when processing the high-strength materials, is reduced.
  • the chips are then mixed with water to form a thick paste and embedded around the abutment mold 9 '(the so-called work pack 36).
  • the water added to the chips or the powder grains can contain different admixtures, for example the addition of about 1% acetic acid facilitates the handling of the pulp, resulting in a thixotropic behavior.
  • the stability or compactness of the mixture is increased by adding alcohols, for example.
  • the type and amount of the admixtures will therefore have to be provided depending on the desired or required property.
  • a thin layer of lacquer of 10 to 50 ⁇ m, applied to the inside and outside of the abutment mold 9 1 closes the pores on the surface and serves as a release agent for the work pack 36.
  • sintering which is carried out for zirconium oxide at a temperature of approximately 1500 ° C., and with the abutment mold 9 'and working pack 36 shrink to the same, defined extent, the lacquer burns without residue, with a minimal gap between the abutment mold 9' and the work pack 36 results, so that the latter can be easily removed from the abutment form 9 'or - in particular also due to the porous consistency - can be emitted.
  • the sintering process can be controlled precisely using such a work pack 36, since the change in the external dimensions allows the shrinking process to be controlled directly.
  • FIG. 7 shows the procedure for fixing the abutment 9 on the implant.
  • the zirconium oxide ceramic abutment according to the invention there is no need to attach an internal hexagon as a rotation lock.
  • the counter-torque to be applied is here, for example, via a Clamping device 3 (for example an artery clamp) is constructed. This clamping device 3 grips the abutment 9 on two opposite outer surfaces and holds it in place while the fastening screw 29 is being screwed in.
  • the zirconium oxide ceramic used is stable enough to be able to withstand these forces, which will generally not be the case for aluminum oxide ceramic abutments. In this way it is possible to reduce the central opening 30 of the abutment to a minimum, since only the space for the screw head and screwdriver is required. The resulting wall thickness is available for free preparation of the abutment or the overall diameter of an abutment can be reduced.
  • Fig. 8 shows another possibility to build up the counter torque required when fixing abutments.
  • a splint 7 can be provided, which connects an abutment 9 with a natural tooth 8, or several abutments 9 and bonded to one another or in combination with natural teeth.
  • This rail 7, which serves as a rotation lock, is provisionally cemented onto the natural tooth 8 and the abutment (s) 9 to be fixed, an occlusal opening 10 being provided for receiving the screwdriver.
  • FIG. 9 shows a possibility of making the dental prosthetic reconstruction work even more efficient by including the Cad-Cam technology in the work procedure.
  • one or more inner shapes of prefabricated dental prosthetic reconstructions, such as crown or bridge elements, stored in the computer are transferred to the outer surfaces of abutments 9 fastened to an implant model using a computer-assisted milling machine.
  • These crown parts 11, which are made of plastic or ceramic, can still be ground in a corrective manner and the color matched to the neighboring teeth.
  • the Cad-Cam technology can also be included in the workflow to copy an abutment form made of plastic.
  • prefabricated plastic sleeves 50 as shown in FIG. 14, can be shaped in the mouth or on the model by applying self-hardening plastic to the desired abutment outer shape.
  • the inside of the plastic sleeve 50 can be provided with a corresponding contact surface, for example an incorporated metal pad 50a.
  • This model is then applied to the ceramic material in the pre-sintered state by means of a copy milling system, with a necessary enlargement factor adapted to the respective sintering process.
  • transfer microabutment which is sintered after grinding.
  • the inter-sintered and different forms of the ZrO 2 abutment are particularly suitable for this.
  • the abutment can be enlarged, for example, in various ways, as shown in FIGS. 10 and 11:
  • FIG. 1 An automatic, mechanical possibility of producing abutments is shown in FIG.
  • a plastic model 13 of an abutment and a ceramic abutment blank 14 are clamped on the brackets 16 of a copy milling system with clamping screws 15 and fixed in the mutual position by means of a connecting piece 17.
  • the zirconium oxide abutment can be copied in the finished or intermediate sintered state. If the abutment is to be ground in the sintered state, an enlargement 18 must also be provided.
  • a diamond disc 19 or other By using a diamond disc 19 or other, correspondingly abrasive grinding instruments and by abundant water cooling when grinding the
  • Abutments make it possible to grind even a sintered oxide ceramic in adequate time - and then without enlargement.
  • the feed motor 20 moves the holder with the clamped abutment relatively slowly at approximately 20 revolutions per minute. Between the feed motor 20 and the holder 16 with the clamped plastic model 13 of an abutment there is a screw thread 21 which slowly moves the holders with the abutments forward.
  • the drive motor 22 for the diamond disk 19 must have a high speed, as is ensured, for example, in the case of air turbines.
  • the mechanical scanning device 24 is guided over the surface of the plastic model 13 via a shaft 23 guided with ball bearings, and the abutment is correspondingly ground out of the ceramic blank 14 on the opposite side.
  • the scanning device 12 can comprise, for example, laser optics or also a mechanical scanning probe.
  • the measured data are stored (represented schematically by 37). After the scanning device 12 has been replaced by a drilling unit 38 and the plastic model 13 has been replaced by a ceramic block 39 or by a pre-sintered or pre-sintered abutment, the ceramic abutment is milled out of the latter in a computer-controlled manner.
  • 15a to 15d show a further possibility of modeling the abutment shape with computer support.
  • Other, predetermined abutment external shapes that may be present in the memory library can also be used for this.
  • FIG. 13 shows a prefabricated abutment 9 made of zirconium oxide with a prefabricated crown part 11 'made of plastic or
  • a precise impression of the implant position is a prerequisite for the perfect fit of the superstructure in the mouth.
  • the manufacture of a gum mask on the Mcdell is essential so that the gingival parts of the abutment can be designed correctly.
  • the zirconium oxide abutment is then prepared in the dental laboratory according to one of the methods described above.
  • the abutment is adapted to the gingiva.
  • a rough preparation takes place under water cooling, which in practice with the filling wax-up try-in can be corrected.
  • Diamond discs are used for the rough preparation and coarse-grained, conical diamond grinders are used for the fine preparation.
  • a separate try-in of the filling wax-up with the abutment is necessary because the abutment height, cervical boundary, correct position of the exit point and the aesthetics can be checked.
  • a correction of the abutment in the patient's mouth by re-preparation may be appropriate. Only in the mouth of the patient is it possible to determine the definitive shape of the abutment in connection with the soft parts.
  • the screw is fixed under a torque of 31 Ncm, the gold screw head m: t gutta-percha is closed, the abutment surface is cleaned, dried and silanized, and the crown or bridge is prepared for the further cementation steps.
  • the abutment shows good compatibility with the common porcelain systems. It should be noted that the heat expansion coefficient of the Keramikverblendmasse entspre ⁇ sponding base ceramic is tuned. Zirconia has a coefficient of thermal expansion of 9.5-70.5 (10 -6 -. ° K ⁇ ⁇ In the rule, the thermal expansion coefficient of the veneering ceramic ⁇ a factor of about 1x10 "6 ° ⁇ -'1 should be smaller than that of the Abutmentmaterials. In special cases it is possible by ⁇ from each abutment is directly ent to blind, whereby a screw-caused removable reconstruction.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Dentistry (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Dental Prosthetics (AREA)

Abstract

Prothèse dentaire implantable comprenant un implant (27) pouvant être fixé dans un os maxillaire, une butée (9) en céramique pouvant être raccordée à l'implant (27) par une vis de fixation (29), un élément de restauration dentaire, par exemple une couronne ou un pont dentaire, et un moyen de fixation pour raccorder ladite butée avec ledit élément de restauration dentaire. Le matériau céramique présente une ténacité à la rupture KIC d'au moins 6 MPa.m1/2 et une résistance à la flexion d'au moins 700 MPa ou 800 MPa, et comprend le cas échéant au moins 90 % en poids d'oxyde de zirconium.
PCT/EP1997/000871 1996-02-22 1997-02-23 Prothese dentaire implantable, butees correspondantes et procede de production desdites butees WO1997030654A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU17945/97A AU1794597A (en) 1996-02-22 1997-02-23 Implantable tooth replacement, abutment therefor and process for making abutments

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH48296 1996-02-22
CH482/96 1996-02-22
CH1471/96 1996-06-12
CH147196 1996-06-12

Publications (1)

Publication Number Publication Date
WO1997030654A1 true WO1997030654A1 (fr) 1997-08-28

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1013536C2 (nl) * 1999-11-09 2001-05-11 Johannes Cornelis Stanislas Be Dentaal implantaat.
US6689202B2 (en) * 2000-07-21 2004-02-10 Jeneric/Pentron Incorporated Molds for the manufacture of a dental restoration and methods of making dental restorations
WO2004054464A3 (fr) * 2002-12-13 2004-12-02 Stefan Neumeyer Pilier pour un implant dentaire, implant dentaire comprenant un tel pilier et procede pour produire une prothese dentaire par utilisation de cet implant dentaire
EP1529498A1 (fr) * 2003-11-05 2005-05-11 Friadent GmbH Implant non-métalique à plusieurs parties
EP1522271A3 (fr) * 1998-07-29 2006-05-17 Franz Sutter Dispositif pour maintenir et/ou former une prothèse dentaire
WO2007006390A1 (fr) 2005-07-14 2007-01-18 Gebr. Brasseler Gmbh & Co. Kg Implant dentaire
EP1870073A1 (fr) * 2006-06-23 2007-12-26 Aepsilon Rechteverwaltungs GmbH Matériau et ébauche pour les dentures
EP1913895A3 (fr) * 2006-10-20 2009-05-06 Peter Gampert Procédé de fabrication de la tête d'un implant dentaire ainsi que set de fabrication pour un la mise en oeuvre d'un procédé
EP2324793A1 (fr) * 2009-11-19 2011-05-25 3M Innovative Properties Company Procédé et système pour la préparation d'une restauration dentaire, élément de mesure et leurs utilisations
US20120064490A1 (en) * 2004-01-27 2012-03-15 Ivoclar Vivadent Ag Inorganic-inorganic composite material and method for producing the same
US8141217B2 (en) 2003-04-04 2012-03-27 Xawex Ag Process for producing dental prostheses
EP1023876B1 (fr) * 1998-12-29 2012-03-28 Silvio De Luca Dispositif de support pour la fabrication d' éléments prothétiques dentaires
DE102011055957B3 (de) * 2011-12-02 2013-03-28 Lennart-Marten Risch Verfahren und Vorrichtung zur Herstellung von zahntechnischen Primär- und Sekundärteilen

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EP0373734A2 (fr) * 1988-12-10 1990-06-20 IMZ-Fertigungs- und Vertriebsgesellschaft für dentale Technologie mbH Implant endo-osseux
EP0389461A1 (fr) * 1989-03-23 1990-09-26 Sandvik Aktiebolag Couronnes artificielles et implants buccaux
US5125839A (en) * 1990-09-28 1992-06-30 Abraham Ingber Dental implant system
EP0580565A2 (fr) * 1992-06-23 1994-01-26 Sandvik Aktiebolag Procédé de fabrication d'éléments de reconstitution d'une dent en céramique
FR2693900A1 (fr) * 1992-07-21 1994-01-28 Prosis Sa Support de prothèse dentaire sur implant.
EP0634149A1 (fr) * 1993-06-24 1995-01-18 Metoxit Ag Procédé de fabrication de prothèses

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373734A2 (fr) * 1988-12-10 1990-06-20 IMZ-Fertigungs- und Vertriebsgesellschaft für dentale Technologie mbH Implant endo-osseux
EP0389461A1 (fr) * 1989-03-23 1990-09-26 Sandvik Aktiebolag Couronnes artificielles et implants buccaux
US5125839A (en) * 1990-09-28 1992-06-30 Abraham Ingber Dental implant system
EP0580565A2 (fr) * 1992-06-23 1994-01-26 Sandvik Aktiebolag Procédé de fabrication d'éléments de reconstitution d'une dent en céramique
FR2693900A1 (fr) * 1992-07-21 1994-01-28 Prosis Sa Support de prothèse dentaire sur implant.
EP0634149A1 (fr) * 1993-06-24 1995-01-18 Metoxit Ag Procédé de fabrication de prothèses

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1522271A3 (fr) * 1998-07-29 2006-05-17 Franz Sutter Dispositif pour maintenir et/ou former une prothèse dentaire
EP1023876B1 (fr) * 1998-12-29 2012-03-28 Silvio De Luca Dispositif de support pour la fabrication d' éléments prothétiques dentaires
WO2001034056A1 (fr) 1999-11-09 2001-05-17 Beekmans Johannes Cornelis Sta Implant dentaire monobloc
NL1013536C2 (nl) * 1999-11-09 2001-05-11 Johannes Cornelis Stanislas Be Dentaal implantaat.
US7943068B2 (en) * 2000-07-21 2011-05-17 Ivoclar Vivadent, Inc. Method of making a dental restoration
US6689202B2 (en) * 2000-07-21 2004-02-10 Jeneric/Pentron Incorporated Molds for the manufacture of a dental restoration and methods of making dental restorations
WO2004054464A3 (fr) * 2002-12-13 2004-12-02 Stefan Neumeyer Pilier pour un implant dentaire, implant dentaire comprenant un tel pilier et procede pour produire une prothese dentaire par utilisation de cet implant dentaire
US8141217B2 (en) 2003-04-04 2012-03-27 Xawex Ag Process for producing dental prostheses
WO2005044134A1 (fr) * 2003-11-05 2005-05-19 Dentsply International Inc. Implant non metallique constitue de plusieurs pieces
EP1529498A1 (fr) * 2003-11-05 2005-05-11 Friadent GmbH Implant non-métalique à plusieurs parties
US20120064490A1 (en) * 2004-01-27 2012-03-15 Ivoclar Vivadent Ag Inorganic-inorganic composite material and method for producing the same
US9090511B2 (en) * 2004-01-27 2015-07-28 Ivoclar Vivadent Ag Inorganic-inorganic composite material and method for producing the same
WO2007006390A1 (fr) 2005-07-14 2007-01-18 Gebr. Brasseler Gmbh & Co. Kg Implant dentaire
US8408902B2 (en) 2006-06-23 2013-04-02 Institut Straumann Ag Material and blank for dentures
EP1870073A1 (fr) * 2006-06-23 2007-12-26 Aepsilon Rechteverwaltungs GmbH Matériau et ébauche pour les dentures
WO2007147549A1 (fr) * 2006-06-23 2007-12-27 Aepsilon Rechteverwaltungs Gmbh Matériau et ébauche pour prothèses dentaires
EP1913895A3 (fr) * 2006-10-20 2009-05-06 Peter Gampert Procédé de fabrication de la tête d'un implant dentaire ainsi que set de fabrication pour un la mise en oeuvre d'un procédé
WO2011063169A3 (fr) * 2009-11-19 2011-08-18 3M Innovative Properties Company Procédé et système de préparation de restauration dentaire, élément de mesure et son utilisation
EP2324793A1 (fr) * 2009-11-19 2011-05-25 3M Innovative Properties Company Procédé et système pour la préparation d'une restauration dentaire, élément de mesure et leurs utilisations
US9326833B2 (en) 2009-11-19 2016-05-03 3M Innovative Properties Company Method and a system in the preparation of a dental restoration, a measuring element and use thereof
DE102011055957B3 (de) * 2011-12-02 2013-03-28 Lennart-Marten Risch Verfahren und Vorrichtung zur Herstellung von zahntechnischen Primär- und Sekundärteilen
WO2013079724A1 (fr) 2011-12-02 2013-06-06 Lennart-Marten Risch Procédé et dispositif de fabrication de parties primaires et secondaires de technique dentaire

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