WO2012065718A1 - Dental-implantatsystem und verfahren zur herstellung eines dental-implantatsystems - Google Patents
Dental-implantatsystem und verfahren zur herstellung eines dental-implantatsystems Download PDFInfo
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- WO2012065718A1 WO2012065718A1 PCT/EP2011/005748 EP2011005748W WO2012065718A1 WO 2012065718 A1 WO2012065718 A1 WO 2012065718A1 EP 2011005748 W EP2011005748 W EP 2011005748W WO 2012065718 A1 WO2012065718 A1 WO 2012065718A1
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- WIPO (PCT)
- Prior art keywords
- connecting pin
- coating
- dental implant
- implant system
- implant
- Prior art date
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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
- A61C8/0013—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 with a surface layer, coating
-
- 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
- A61C13/0006—Production methods
- A61C13/0007—Production methods using sand blasting
-
- 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
- A61C13/0018—Production methods using laser
-
- 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
- A61C8/005—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
- A61C8/0068—Connecting devices for joining an upper structure with an implant member, e.g. spacers with an additional screw
-
- 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
-
- 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
- A61C8/0018—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 shape
- A61C8/0022—Self-screwing
-
- 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
- A61C8/0086—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools with shock absorbing means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49567—Dental appliance making
Definitions
- the invention relates to a dental implant system having a first implant part intended for insertion into a jawbone and having a second implant part assigned thereto for attachment of a tooth replacement piece, wherein the implant parts are integrally formed on one of the implant parts. can be mechanically connected to one another in a receiving channel provided in the other implant portion receiving connector.
- dental implants can be used as part of the reconstructive therapy. They are usually used instead of an extracted or failed tooth in the jaw bone to hold there after a healing period of about four to twelve weeks serving as a prosthetic prosthetic part or a crown.
- a dental implant is usually formed as a suitably shaped metal body, which is inserted by screwing at the intended location in the jawbone.
- the dental implant usually has at the apical end a mostly self-tapping screw thread with which the dental implant is inserted into the correspondingly prepared implant bed.
- dental implant systems can be designed in several parts.
- a basically two-part construction can be provided, wherein the dental implant system comprises a first implant part, which is also intended as an actual implant or post part for insertion into the jawbone, and in addition to this an associated second, also known as abutment part.
- CONFIRMATION COPY comprises second implant part drawn to which in turn provided as a prosthesis or the like tooth replacement piece can be attached.
- the first implant part or post part is usually provided on its outer side with a thread, which can be designed as a self-tapping or not as a self-tapping thread.
- the post part is usually anchored in a correspondingly prepared implant bed of the jawbone.
- the design of the provided in the outer region of the dental implant thread is usually designed for a high primary stability of the arrangement and a uniform transmission of the forces occurring in the chewing load of the dental implant forces in the jawbone.
- connection pin which is integrally formed on one of the implant parts, as a rule on the abutment part, is usually provided. This can be inserted into a receiving channel provided in the other implant part, as a rule in the post part.
- the connecting pin on the one hand and the receiving channel on the other hand are usually adapted to each other so that with a relatively simple mountability still good guidance of the components into one another and thus a sufficiently high mechanical stability can be achieved.
- the body part which is usually equipped at its upper portion with a crown, another prosthetic restoration or the like in a conventional manner, can be glued to the mechanical connection with the post part via the inserted into the receiving channel connecting pin with the post part.
- the body part can also be pressed into the post part and fixed only by jamming, or else additionally fixed by cementing or gluing.
- the dental implant when screwing the body part and especially later in chewing mechanically extremely heavily loaded, so that an adhesive bond of the type mentioned may not have sufficiently high mechanical stability just in view of the desired very long residence time in the patient's mouth.
- the body part can also be screwed to the post part via a suitably chosen connecting screw.
- the thread of the connecting screw When inserting the thread of the connecting screw is usually screwed into an associated internal thread in the post part.
- the screw head of the connecting screw presses it against the dental implant via a countersink of the abutment part.
- Such multi-part dental implant systems with a screw connection between the mounting part and the post part are known, for example, from DE 10 2006 018 726 A1 or DE 10 2008 054 138 A1.
- the first implant part or post part and likewise the second implant part or head or mounting part usually consist of a suitably chosen metal, in particular of titanium or a titanium alloy.
- a suitably chosen metal in particular of titanium or a titanium alloy.
- This choice of materials provides acceptable tolerability for the patient and good biocompatibility.
- implant systems manufactured on this material basis have a high long-term stability with low susceptibility to fractures. Accordingly, titanium is widely used as a raw material for implant systems and also enjoys extensive scientific acceptance, especially since the sterilization required for use within the reconstructive therapy can be ensured comparatively easily and reliably.
- the material costs are also limited, so that comparatively large numbers of implant systems can be produced on this basis usually with acceptable cost.
- ceramics as a base material for implants into consideration, usually based on zirconia (preferably yttria or alumina-stabilized), or zir- coniferous alloys, zirconia-alumina ceramics or ceramics, either zirconia or Include alumina or have at least one of the ceramics as the main component.
- ceramics can be used, which are based on silicon or silica and z. As admixtures of nitrogen, hydrogen, carbon or tungsten include. Ceramic implant systems have the general advantage of high biocompatibility and thus good compatibility, the allergenic potential is extremely low.
- the surface is largely unfavorable for bacterial growth, so that such implants in their entirety are particularly favorable for long-term applications and long residence times in the patient's mouth.
- almost no gray discoloration occurs in the surrounding tissue, so that particularly high-quality aesthetic effects can be achieved.
- Ceramic-based dental implants are currently known essentially only in one-piece design.
- the material properties of the ceramic components eg brittle, high hardness, low to no ductility
- material hardnesses according to Vickers
- material hardnesses according to Vickers
- the invention is therefore based on the object to provide a - preferably two- or multi-part executed - implant system of the type mentioned above, which also with the use of ceramic or their basic material properties comparable base materials for at least one of the implant parts a special stability and long service life allows. Furthermore, a particularly suitable manufacturing method for the implant system should be specified.
- the connecting pin is made of a material having a hardness of at least 500, preferably of at least 750, more preferably of at least 1000, and has in a contact region to the receiving channel on its surface one of a softer compared to the material of the connecting pin material, in particular with a hardness of at most 25, preferably of at most 20, particularly preferably at most 15, formed coating, preferably as a spacer on.
- the connecting pin is porous in its surface area provided with the coating, preferably with a porosity of at least 0.1.
- the hardness values mentioned are to be understood as hardness values according to Vickers on the basis of a test force of 10 kiloponds in accordance with DIN, ie. H. the said hardness value of 500 corresponds, for example, to a standard specification of 500 HV 10.
- the invention is based on the consideration that in multi-part implant systems a high stability and longevity can be achieved if the forces occurring in the chewing processes are taken into account in a suitable manner. Especially in the transmission of these forces in multi-part dental implant systems from Body part in the anchored in the jaw bone post part should be ensured a largely material-friendly power transmission. This is particularly achievable by consistently making a planar contact while largely avoiding localized contact points between the implant parts. In contrast to metal-based systems, in which such surface contact almost automatically occurs due to the higher elastic deformability and the ductility of the material in response to the applied forces, the surface contact in ceramic-based systems could be due to the lack of ductility the material and in view of almost necessarily existing manufacturing tolerances and inaccuracies be insufficient.
- an additional element is now provided in the structure of the dental implant system which, in the manner of a compensating body, is intended to prevent the formation of local, point contact points between the implant parts.
- the spacer provided for this purpose should be predetermined with regard to its choice of material in such a way that-due to suitable ductility-it produces a suitable compensation in the intermediate space between the implant parts and thus ensures a flat force transmission between the components.
- the material of the spacer should be chosen correspondingly softer and thus deformable than the material of the actual implant parts.
- the spacer could be designed as a braid by materially bonded to it, that is, for example glued or fused, material threads so that it is present in particular in the form of a net-like coating.
- a reliable setting of a suitable, possibly production-related surface roughness of the contact surfaces compensating minimum distance between the contact surfaces possible in the spaces formed by the fabric threads still free, suitable for a material intake volumes are formed.
- These are particularly suitable for absorbing excess material, such as adhesive or the like.
- spacers considered to be inventive are particularly suitable for bonding the implant parts together.
- the spacer is designed as applied to the surface of the connecting pin coating.
- the coating may be partially or web-like mounted on the surface of the connecting pin, but is advantageously carried out continuously and over the entire surface. This results in a full-surface design of the spacer on the connecting pin.
- the spacer for bonding the implant parts together as well as for the preparation of a connection by screwing since the spacer in this case can then also cause a damping in the power transmission between the screwed together implant parts.
- the spacer is positively connected, ie in particular as a coating or glued or fused element, connected to the connecting pin.
- the spacer may also be applied in the manner of an inner coating on the inside of the receiving channel, so that it is also positioned after mounting the implant parts in the connecting region of the implant parts with each other between them.
- a combination of two spacers, ie one on each of the two implant parts, is also possible.
- the cohesive connection of the spacer with the connecting pin executed particularly intimately.
- the connecting pin has a roughened and / or porous surface in the region of its connection to the spacer or in the region of the coating.
- the porosity of the surface which is produced in particular by roughening, is designed in such a way that a porous upper surface is formed.
- the porosity is a dimensionless measurand. It represents the ratio of void volume to total volume of a substance or mixture of substances and is defined as 1 minus the quotient of bulk density of a solid and pure density.
- the roughening is advantageously applied to the surface after the actual production, ie in particular within the scope of an additional treatment step.
- the surface of the connecting pin in the region of the cohesive connection with the spacer has an r a value of at most 10%, preferably of at most 5%, of the layer thickness of the coating or of the spacer.
- the average roughness of the surface is advantageously at most 10% of the layer thickness of the coating or of the spacer.
- the roughening can be carried out, for example, mechanically (for example by irradiation, for example by sandblasting), chemically (for example by etching) or by irradiation with a laser, preferably with a femtosecond laser.
- the connecting pin advantageously has, in cross section, an outer contour adapted to the contour of the associated receiving channel. Seen in the longitudinal direction of the connecting pin or receiving channel, both can also be designed with a constant cross-section, that is, for example, with a cylindrical base body.
- the cross-sections taper in the direction of the free end of the connecting pin, in a particularly advantageous embodiment in a conical design, so that in a particularly simple manner good adhesion and high tightness can be achieved.
- the outer contour of the connecting pin - and adapted accordingly the receiving channel in its inner contour - in cross-section at least partially or in sections a multiple symmetry.
- the spacer is advantageously dimensioned such that, on the one hand, excessive flexibility and deformability of the assembled overall system due to excessive layer thickness are avoided and, on the other hand, reliable compensation of surface roughness and manufacturing tolerances is ensured.
- the fact is also preferably taken into account that just with conical connections between the body part and the post part, the elastic deformability of the post part is used to compensate for production-related angle tolerances with respect to the cone angle.
- the angle tolerances are usually so di- Sizes that the cone angle of the mold cavity in the post part is smaller than the cone angle of the integrally formed on the mounting part pin.
- the respective components are advantageously selected in view of a high long-term stability, especially in the intended operating environment, and also with regard to particularly good compatibility and biocompatibility.
- a suitably chosen metal preferably gold, which is sufficiently soft, in particular with regard to the choice of material of the actual implant parts, could be selected for the spacer.
- the spacer made of a plastic, preferably made of a high-strength thermoplastic from the group of polyether ketones, in particular polyetheretherketone, also known as PEEK produced.
- the plastic forming the spacer has a modulus of elasticity of at least 1000 MPa.
- the spacer is sufficiently hard to withstand the forces occurring during chewing, so that a plastic deformation and a "swelling" of the material are avoided.
- the distance-holder plastic forming in additional or alternative advantageous embodiment, a water absorption of at most 1% , preferably of at most 0.5%, more preferably of at most 0.2%.
- the components of the implant system are advantageously designed for easy sterilization.
- the plastic forming the spacer advantageously has a softening temperature of at least 140 ° C., preferably of at least 160 ° C., more preferably of 300 ° C., so that standard superheated steam sterilizations are carried out without restriction (usually at a temperature of 134 ° C.) can be made once or several times as needed.
- the connecting pin is preferably formed of a ceramic, in particular of zirconium oxide, so that overall a high stability of the system is ensured.
- a ceramic connecting pin with applied surface coating is particularly advantageous for use in combination with a post part or receiving channel made of titanium or other metallic material, since basically in the material pairing ceramic / metal, especially ceramic / titanium, due to the significantly greater hardness of Ceramic with metal abrasion and corresponding surface and color changes must be expected.
- the mentioned ceramic usually has a hardness according to Vickers ("Vickers hardness", HV) of more than 1000 on. Since the mentioned effects occur already amplified with ceramics having a Vickers hardness of 500 or more, the spacer provided as an intermediate or buffer element is already particularly advantageous for this reason.
- the mentioned effects, in particular the surface abrasion can be effectively avoided in particular by the surface coating acting as a spacer between ceramic on the one hand and metal, in particular titanium, on the other hand.
- a total of one ceramic, in particular zirconium oxide or aluminum oxide, is used for the implant parts, in any case as the main component, as a result of which a metal-free basic body is provided.
- Such materials are characterized by their excellent biocompatibility and provide a bacteria-resistant surface.
- the connecting pin made of yttrium and / or alumina-stabilized zirconia is carried out, wherein in a further advantageous embodiment, the surface of the connecting pin in the region of the material connection with the spacer a depletion zone with a reduced compared to the inner volume of the connecting pin yttrium or aluminum oxide content.
- a ceramic base body may preferably be treated by means of laser treatment and / or in a liquid and / or gaseous medium, preferably in an acid bath, wherein the acid bath is mixed with ions, each consisting of an element from one of the V. to VII. Main Group of the Periodic Table of the Elements or include such an element as a component.
- ions each consisting of an element from one of the V. to VII. Main Group of the Periodic Table of the Elements or include such an element as a component.
- this process leads to the formation of surface structures which ensure particularly favorable wetting properties and, when the ceramic body is used.
- Pers as carrier body for the spacer allow a particularly good adhesion of the intended as a spacer coating.
- the treatment of the ceramic base body in the manner of the etching and in particular the intercrystalline etching namely forms a specific nanostructure on the surface.
- a multiplicity of comparatively smaller pores or depressions having a mean extent in the sub-micron range, preferably less than 500 nm and in particular less than 250 nm, are to be found.
- Such structures can be detected for example by means of electron micrographs.
- the surface is characterized in particular by the fact that the depth of the nanostructure, ie the depth of the thereby obtainable pores, is greater than the structure width, ie the characteristic lateral extent of the structures achieved.
- the intended porosity of the surface is thus provided with particularly favorable for the desired high-strength cohesive connection properties.
- the ratio in the nanostructure between the structure depth and the structure width is greater than 1: 1, advantageously greater than 1.5: 1 and in particular greater than 2: 1.
- the advantageously provided depletion zone in the surface region which ultimately brings about the desired structure and the desired properties in the connection with the material of the spacer, in particular by selective or at least selectively accelerated dissolution of individual components such as chemical elements and / or oxides from the surface, preferably by a suitably selected etching process.
- Such favorable structures can be created, in particular, by detaching individual elements and / or individual metal oxides (zirconium oxide, aluminum oxide, yttrium oxide, hafnium oxide, etc.) present in the ceramic, in particular yttrium oxide and hafnium oxide, from the surface.
- a depletion zone of these metal oxides is formed on and / or in the vicinity of the surface near the surface.
- the ratio between the tetragonal and the monoclinic phase in the stabilized zirconia has changed.
- the proportion of the monoclinic phase in the surface could be increased or reduced by at least 0.1%, advantageously to or more than 0.5% and in particular to or more than 1.5% by such a method become. Since the surface is pressurized by the lower density of the monoclinic phase, the initial crack formation is inhibited in this way, so that an increase in the initial strength can be expected.
- the preparation of the intended depletion zone in the surface of the ceramic body can be carried out in particular by an etching process in a suitably selected acid bath.
- the envisaged reactants for the ceramic of the main body ie the ions with constituents from the fifth to seventh main group of the Periodic Table of the Elements, can act in particular as salt formers for the respective metal.
- the acid bath may comprise ions consisting of or comprising as constituents nitrogen (N), oxygen (O), fluorine (F), chlorine (Cl), sulfur (S) and / or phosphorus (P).
- N nitrogen
- O oxygen
- F fluorine
- Cl chlorine
- S sulfur
- P sulfur
- the stated object is achieved by roughening the connecting pin on its surface prior to the production of the integral connection with the spacer in the region of the intended connection with the spacer.
- the roughening can be in an advantageous embodiment by laser irradiation or. be made by sandblasting.
- the connecting pin is made porous on its surface in the region of the intended connection with the spacer on the surface before the bonded connection with the spacer is produced, preferably by means of an etching process.
- a coating provided for forming the spacer on the connecting pin is advantageously applied to this a dispersion, which is then dried.
- the dispersion advantageously provided for the formation of the coating particles are held with a particle size of up to 20 pm in solution.
- the dispersion can then be sprayed on or otherwise applied in a suitable manner, in which case advantageously a drying step at a drying temperature of, for example, about 150 ° C.
- the solvent components are volatilized, so that the material particles precipitate and thus form the coating.
- the drying is preferably carried out in vacuo or under reduced pressure, so that the formation of air inclusions is kept particularly low. In particular, since such air pockets could block the entry of the material into the surface pores of the carrier body, in this way an intimate cohesive connection is particularly favored.
- a heat treatment of the provided with the coating connection pin at a treatment temperature above the softening temperature of the Beschich- tion material preferably of at least 350 ° C, more preferably of at least 400 ° C, provided.
- a treatment temperature above the softening temperature of the Beschich- tion material preferably of at least 350 ° C, more preferably of at least 400 ° C.
- This can be done in the manner of melting the applied material, a homogenization, wherein optionally at the same time a penetration of the coating material is promoted in surface pores or roughnesses in the connecting pin.
- Such a treatment is particularly favorable and effective for layer thicknesses up to about 0.1 mm.
- a powder coating could be provided for layer thicknesses greater than 0.1 mm.
- the advantages achieved by the invention are, in particular, that inaccuracies and manufacturing tolerances in the components can be compensated for by the spacers provided in the connecting region of connecting pin and receiving channel, so that even when using ceramic materials for the connecting pin or the implant parts as a whole Contact between see these parts can be made.
- the spacers provided in the connecting region of connecting pin and receiving channel so that even when using ceramic materials for the connecting pin or the implant parts as a whole Contact between see these parts can be made.
- a material-sparing and reliable forwarding of the forces is possible, so that the use of the ceramic materials which are in themselves desirable is also possible in multi-part dental implant systems.
- a provided at least in the surface area porosity of at least 0.1 is particularly advantageous in order to apply an adhesive coating of a plastic, in particular PEEK can.
- the advantages of a plastic-based coating on a ceramic base body are in particular the change in the chemical properties and in particular the acid resistance. With regard to the mechanical property changes, in particular the optimized introduction of force / force transmission must be mentioned. But even the change in the coefficient of friction ⁇ by means of an adhesive coating provides ceramic materials significant advantages in the applicability, especially in comparison to other metallic materials.
- FIG. 1 to 3 each a dental implant system as an exploded view
- FIG. 4 shows the dental implant system of FIG. 3 in longitudinal section
- FIG. FIG. 5 shows a mounting part of the dental implant system according to FIG. 1 to 3 in cross section
- FIG. FIG. 6 shows a post part of the dental implant system according to FIG. 1 to 3 in cross section
- FIG. 7, 8 a structural part of the dental implant system according to FIG. 1 to 3 in lateral View
- FIG. 9, 10 each show an alternative embodiment of a dental implant system
- FIG. 11 in section the connection area of the components of the dental implant system.
- the dental implant system 1, 1 ', 1 "according to FIGS 1 to 4 is in each case intended for use in the jawbone instead of an extracted or failed tooth, in order to hold there a prosthetic part or a crown serving as a dental prosthesis.
- Implant system 1, 1 ', 1 " is designed in each case in several parts and comprises a so-called post part designed as first implant part 2, 2', 2" and one associated therewith, provided for attachment of a dental prosthesis, also called biologyteil second implant Part 4.
- the first implant part 2, 2 ', 2 "or post part is provided on the outside with an external thread 6, which is configured in particular at the apical end 8 as a self-tapping screw thread.
- the first implant part 2, 2 ', 2 "or post part can be used by screwing at the intended location in the jawbone.
- a Connecting pin 10 is formed, which in an associated, in the first implant part 2, 2 ', 2 "provided receiving channel 12 can be inserted.
- the connecting pin 10 By inserting the connecting pin 10 in the receiving channel 12 creates a mechanical connection of the implant parts 2, 4 with each other.
- the connecting pin 10 is adapted in its outer contour to the inner contour of the receiving channel 12, wherein both seen in the longitudinal direction co may be shaped nisch (embodiment of FIG 2).
- both seen in the longitudinal direction co may be shaped nisch (embodiment of FIG 2).
- the outer contour of the connecting pin 10 - and adapted accordingly the inner contour of the receiving channel 12 - be configured in cross-section with a Kibonuclear (sechtron in the embodiment) symmetry, so that upon assembly of said components, a rotational locking occurs and thus a reliable rotational alignment the body part can be adjusted relative to the post part.
- 4 is for this purpose an indexing or to form a rotary locking end of the connecting pin 10, an indexing element 14 in turn a cross-section with multiple symmetry arranged, which engages in the assembled state in a corresponding, associated Endkanal Division 16 in the receiving channel 12.
- the dental implant systems 1, 1 ', 1 "in the exemplary embodiments according to FIGS. 1 to 4 are in each case designed for a screw connection of the implant parts 2, 4.
- a connecting screw 18 is provided which fits into a first implant -Part 2, 2 ', 2 "each provided screw thread 20 engages.
- the implant parts 2, 4 are suitably adapted to the intended use and basically made of ceramic material such as zirconium oxide or alumina.
- ceramic material such as zirconium oxide or alumina.
- 10 yttrium-stabilized zirconia is selected as the material for the connecting pin.
- This has a comparatively high hardness of Vickers (Vickers hardness) of 1500 ⁇ 100.
- Vickers Vickers hardness
- the connecting pin 10 is provided on its surface 24 with a coating 26 in a contact region to the receiving channel 12 5.
- a coating 26 it is provided that it should be made of a material which is significantly softer compared to the material of the connecting pin 10 and has a hardness (according to Vickers) of not more than 25
- the coating 26 produces a suitable compensation in the intermediate space between the implant parts 2, 4, so that a planar force transmission between the components is ensured the heavy-duty thermoplastic Po lyetheretherketone, also known as PEEK.
- PEEK usually has a hardness of Vickers of about 12 and thus fulfills the now proposed design criterion particularly satisfactory.
- the coating 26 may alternatively or additionally be arranged on the inner surface 28 of the receiving channel 12 in the post part 2 or the second implant part 4 with the same effect, as shown in the cross-sectional drawing in FIG. 6 is shown.
- the coating 26 provided for the formation of the spacer 22 is implemented continuously in the manner of a full-area coating.
- it may also comprise, in the manner of a net, braid or the like enclosing the connecting pin 10, a plurality of partial elements or partial coatings 30 which form a net-like structure (FIG. 7) to form intermediate spaces 32. or also independently of one another (FIG. 8) in each case in a materially bonded manner to the connecting pin 10 - or, in the case of inside mounting, to the inner surface of the receiving channel 12.
- connection system is thus particularly suitable for an adhesive connection of the implant parts 2, 4 with each other.
- This formation of receiving chambers for excess adhesive can be promoted even further by using the respective other component - in FIG. 9 shown for the receiving channel 12 and in FIG. 10 for the connecting pin 10 - mechanically further receiving chambers 34, in the embodiment of FIG. 9, 10 in the form of additionally mounted circumferential grooves 36, are provided.
- both in one embodiment as a continuous, full-surface coating 26 and in a configuration with gaps 32, an intimate cohesive connection between the connecting pin 0 and the inner surface 28 of the receiving channel 12 on the one hand and the spacer 22 forming coating 26 on the other hand provided.
- the surface of the connecting pin 10 is roughened in the region of the coating and / or made porous.
- FIG. 11 is shown schematically in the enlarged section, the roughening or porosity in the surface area, in particular of the respective ceramic component, results in the formation of a plurality of small material chambers 38, into which the comparatively soft material forming the coating 26 can penetrate.
- the said porosity or roughening of the surface can be achieved by a particularly suitable method, for example by - possibly material-specific - etching, by targeted setting of a depletion zone of a material or a crystallographic parameter or the like can be produced.
- FIG. 11 shows the cohesive connection of the coating 26, which is obtainable in this way, with the component carrying it, in the figure, the connecting pin 10, shown schematically.
- a connection zone 40 By roughening the surface of the connecting pin, optionally connected to a depletion zone near the surface, which can be prepared for example by targeted dissolution or etching of individual material components or components, creates a connection zone 40, in the material from the coating 26 in the pores, surface holes or the like enters the correspondingly prepared surface of the connecting pin 10.
- this connection zone 40 therefore, the materials from the connecting pin 10 on the one hand and the coating 26 on the other hand are present together, so that they form an intimate toothing.
- such a concept for applying a coating to a preferably ceramic surface is also regarded as an independently inventive concept, even for areas of application independent of dental implants.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Public Health (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Dental Prosthetics (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11807636.3A EP2640306B1 (de) | 2010-11-15 | 2011-11-15 | Dental-implantatsystem und verfahren zur herstellung eines dental-implantatsystems |
ES11807636.3T ES2573681T3 (es) | 2010-11-15 | 2011-11-15 | Sistema de implante dental y procedimiento para la producción de un sistema de implante dental |
US13/885,643 US9770311B2 (en) | 2010-11-15 | 2011-11-15 | Dental implant system and method for producing a dental implant system |
CN201180062921.5A CN103327928B (zh) | 2010-11-15 | 2011-11-15 | 牙科植入系统和制作牙科植入系统的方法 |
BR112013011856-3A BR112013011856B1 (pt) | 2010-11-15 | 2011-11-15 | sistema de implante dental e processo para a fabricação de um sistema de implante dental |
CA2817860A CA2817860C (en) | 2010-11-15 | 2011-11-15 | Dental implant system and method for producing a dental implant system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010051176A DE102010051176A1 (de) | 2010-11-15 | 2010-11-15 | Dental-Implantatsystem und Verfahren zur Herstellung eines Dental-Implantatsystems |
DE102010051176.5 | 2010-11-15 |
Publications (1)
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WO2012065718A1 true WO2012065718A1 (de) | 2012-05-24 |
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ID=45470500
Family Applications (1)
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PCT/EP2011/005748 WO2012065718A1 (de) | 2010-11-15 | 2011-11-15 | Dental-implantatsystem und verfahren zur herstellung eines dental-implantatsystems |
Country Status (8)
Country | Link |
---|---|
US (1) | US9770311B2 (de) |
EP (1) | EP2640306B1 (de) |
CN (1) | CN103327928B (de) |
BR (1) | BR112013011856B1 (de) |
CA (1) | CA2817860C (de) |
DE (1) | DE102010051176A1 (de) |
ES (1) | ES2573681T3 (de) |
WO (1) | WO2012065718A1 (de) |
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- 2011-11-15 CA CA2817860A patent/CA2817860C/en active Active
- 2011-11-15 US US13/885,643 patent/US9770311B2/en active Active
- 2011-11-15 BR BR112013011856-3A patent/BR112013011856B1/pt not_active IP Right Cessation
- 2011-11-15 EP EP11807636.3A patent/EP2640306B1/de active Active
- 2011-11-15 ES ES11807636.3T patent/ES2573681T3/es active Active
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Also Published As
Publication number | Publication date |
---|---|
EP2640306B1 (de) | 2016-02-10 |
EP2640306A1 (de) | 2013-09-25 |
CA2817860A1 (en) | 2012-05-24 |
ES2573681T3 (es) | 2016-06-09 |
DE102010051176A1 (de) | 2012-05-16 |
BR112013011856A2 (pt) | 2016-08-16 |
CN103327928A (zh) | 2013-09-25 |
US9770311B2 (en) | 2017-09-26 |
US20150037759A1 (en) | 2015-02-05 |
CA2817860C (en) | 2018-11-06 |
CN103327928B (zh) | 2016-10-19 |
BR112013011856B1 (pt) | 2020-07-28 |
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