DE202014004751U1 - implant - Google Patents

Abstract

An implant, in particular a crestal dental implant (1), comprising an elongated anchoring section (2) extending in the longitudinal direction (L) along a longitudinal central axis (A) and an implant stump (4), the implant consisting at least partially of an implantable material, the implant Anchoring portion (2) has an elongated core (5) from which in the longitudinal direction (L) and in the circumferential direction (U) distributed more anchoring claws (6) roughly outwardly radially outwardly, characterized in that at a common core cross-section at the core circumference each exactly three Anchoring claws (6) are arranged.

Description

The present invention relates to an implant, in particular a dental implant for the jaw region, preferably a crestales dental implant, comprising an elongated anchoring portion extending in a longitudinal direction and an implant stump, wherein the implant consists at least partially of an implantable material.

The dental implants in question in the context of the invention serve according to DE 10 2011 001 401 A1 as an artificial tooth root, which a dentist or surgeon can anchor in the bone of the upper or lower jaw and on whose protruding from the jaw bone implant stump a denture or the like can be anchored. Such implants are therefore also referred to as dental implants or occasionally according to their location as jaw implants. The implant stump is also referred to in the literature as an abutment. In this connection, various implant types are known in the prior art. Metallic crestal implants, the actual classic implants in a kind of tooth root shape, have at their anchoring portion a thread (or two threads with different threads to achieve a kind of compression), with which they are screwed into the bone. The transmission of force in such implants occurs crestally or in the so-called collar area, which adjoins the threaded area. Since the jawbone bends at the mouth opening and bite and the collar area changes with it, the healing time for classic implants is problematic. But even later, it can lead to detachment of the bone material of the implant, since the metal used for classical implants can not feel the internal movements of the jawbone. So far, industrial attempts have been made to eliminate this problem by various surface treatments and compressive surface design. In addition, it comes as a difficulty that implants are needed for different anatomical conditions. There are therefore a large number of suppliers on the market, each of which offers a variety of implants (often at least five types, but also up to thirty or forty different types) in different sizes and with different surfaces and different prosthetic abutment parts. The prosthetic abutment parts are also important distinguishing features among the providers, since the problem of the mucous membrane penetration of the implant and the connection of the dental crown to be applied thereon can be solved differently and must be solved individually. Conventionally, therefore, a larger number of auxiliary parts (eg. About forty auxiliary parts) is required per implant system, which should enable the dentist to find the best aesthetic and functional solution. This is necessary because in the conventional crestal screw implants with metal, preferably with titanium, is used, which may not be edited and changed by the dentist, otherwise the crystalline structure of the material could be damaged and corrosion could occur.

In the DE 10 2011 001 401 A1 For example, a crestal implant is described, which has one or more groups of ribs, in the ribs of the radially outer rib edge a radial distance from the longitudinal central axis of the implant ( 1 ), which corresponds at least approximately to the radial reference distance, and that one or more rib groups are provided, within which of their ribs only a number of parts, or within those of their ribs, all the ribs at their radially outer rib edge along its entire or only partial circumferential extent Radial distance from the longitudinal central axis which is greater than the radial reference distance.

Furthermore, according to the WO2012059599A1 a method for producing an osteomimetic material, a material of which an endosseous implant is made for medical or veterinary use, and an endosseous implant made from this material, the implant being made of a mixture consisting of a biocompatible thermoplastic polymer, in particular PEEK and a beta-tricalcium phosphate (βTCP) converted to a non-stoichiometric calcium apatite.

It is an object of the invention to provide an improved solution for dental implant which avoids or at least reduces at least some of the disadvantages known in the prior art.

The object is achieved by means of a device according to one of claims 1 to 5.

The article according to the independent main apparatus claims relates to an implant, in particular a crestal dental implant, which comprises an elongated anchoring section and an implant stump extending in the longitudinal direction (L) along a longitudinal center axis (A). Furthermore, the implant consists at least partially of an implantable material.

The anchoring section has an elongate core, from which, for example, several anchoring claws emerge distributed in the longitudinal direction (L) and in the circumferential direction (U). According to a variant of the invention, exactly three anchoring claws are respectively arranged on a common core cross-section on the core circumference.

This teaching according to the invention achieves the advantage that, as a result of the distributed arrangement of exactly three anchoring claws per core cross-section in the longitudinal direction (L), symmetry about the longitudinal central axis (A) of the implant preferably results. As a result, the implant receives particularly advantageous properties for healing in the jawbone, which enable a particularly firm fit in the jawbone after the healing of the implant.

The subject matter of another main claim relates to an implant, in particular a crestal dental implant, which comprises an elongate anchoring section extending in the longitudinal direction (L) along a longitudinal center axis (A) and an implant stump. Furthermore, the implant consists at least partially of an implantable material. The anchoring portion has an elongate core, from which in the longitudinal direction (L) and in the circumferential direction (U) spread out several anchoring claws. The elongated core of the anchoring section here has three flats extending in the longitudinal direction (L) distributed over its circumference, in particular uniformly distributed, the anchoring claws being arranged with a respective claw base on the flattenings. Here, the area of the core perimeter between the flats is left free.

By this teaching according to the invention the advantage is achieved that a straight contact of the claw base is made possible by the three flats for receiving the claw base, whereby a kind of hinge for the anchoring claw is formed. This results in the further advantage that the anchoring claw with its entire length upon insertion into a prepared hole in the jawbone of a patient in contact with the jawbone in the direction of the flattening, preferably elastic, yields and damage and in particular a cutting of the dental implant avoids in the remaining jawbone. In addition, the flattenings cause the anchoring claws to be set back relative to the remaining peripheral surface of the core and the anchoring claws can thus be made longer, whereby the flexibility and resilience of the anchoring claws can be influenced again. In particular, the cavity in the jawbone prepared for insertion of the dental implant of the present invention may utilize an insertion opening for the dental implant with the least possible diameter of wellbore, which advantageously requires minimal loss of jawbone material. In addition, the insertion hole with the smallest possible hole diameter after passing the dental implant prevents the dental implant from moving out of the cavity after the anchoring claws have returned to their original position.

The subject matter of another main claim relates to an implant, in particular a crestal dental implant, which comprises an elongated anchoring section and an implant stump extending in the longitudinal direction (L) along a longitudinal center axis (A). Furthermore, the implant consists at least partially of an implantable material. The anchoring portion has an elongated core, from which in the longitudinal direction (L) and in the circumferential direction (U) distributed at least one anchoring claw emanates. The at least one anchoring claw has, viewed in the longitudinal direction (L), a cross section which is formed to form an edge by two contacting circular sections, in particular with respectively different curvatures.

By this teaching according to the invention the advantage is achieved that an enlarged surface for the growth of the bone is provided by the two circular sections and at the same time a cutting of the anchoring claw in the open bone material, when inserting the implant, is avoided by sharp protruding edges. Furthermore, the edge is preferably created by virtue of the fact that the two circular sections have a different radius of curvature and / or have an offset relative to one another.

The subject of the other main claim relates to an implant, in particular a crestales dental implant, which comprises an elongated, in the longitudinal direction (L) along a longitudinal central axis (A) extending anchoring portion and an implant stump. Furthermore, the implant consists at least partially of an implantable material. The anchoring portion has an elongated core, from which in the longitudinal direction (L) and in the circumferential direction (U) distributed at least one anchoring claw emanates. Furthermore, it is provided that the at least one anchoring claw viewed in the longitudinal direction (L) has a cross-section which has a course deviating from an imaginary circumferential line at a region remote from the core. In other words, it is intended that the substantially round cross-sectional shape of the core or the implant stump viewed in the longitudinal direction L be broken by the anchoring claws on the flattened surfaces, as these protrude in a radiating outward cross-section in particular.

By the teaching according to the invention the advantage is achieved that this embodiment of the invention can be implanted particularly easily and yet has very good healing properties, wherein the implant is held particularly firmly in the jawbone after a complete healing.

The subject matter of another main claim relates to an implant, in particular a crestal dental implant, which comprises an elongate anchoring section extending in the longitudinal direction (L) along a longitudinal center axis (A) and an implant stump. Furthermore, the implant consists at least partially of an implantable material. The anchoring portion has an elongated core, from which in the longitudinal direction (L) and in the circumferential direction (U) distributed at least one anchoring claw emanates. The free space formed between the anchoring claws adjacent in the longitudinal direction (L) has a cross-sectional profile which is viewed in the radial direction and which does not taper away from the core and does not taper radially outwards.

This teaching according to the invention achieves the advantage that a particularly advantageous automated injection molding process can be used, in particular with regard to the manufacture of the implant. This feature is particularly important in the automatic opening of the injection mold, in particular when moving apart of the moldings, of importance, since the anchoring claws must solve this as smoothly as possible from the corresponding cavities.

Furthermore, it should be noted that a combination of the characterizing features of the aforementioned main claims among themselves is also conceivable, as long as this is not covered by the dependent claims, as well as the mere combination of the respective advantages may have further synergistically resulting advantages.

Hereinafter, further exemplary embodiments of the implant will be explained.

According to a first exemplary embodiment, the implant further comprises that the anchoring claws can be combined in a group, wherein one group in each case comprises all anchoring claws distributed on a common core cross section at the core circumference. The teaching according to the invention achieves the advantage that a uniform loading of the anchoring claws on a core cross-section takes place and thus an easy adjustability of the position and / or orientation of the dental implant in the jawbone can advantageously take place.

According to a further exemplary embodiment, the implant further comprises that the anchoring claws respectively arranged on a common core cross section on the core circumference have a radially outer claw edge with a uniform radial distance from the geometric longitudinal center axis (A) of the implant along its entire circumferential extension. In other words, the anchoring claws having a common core cross-section have a uniform length, which, however, may vary in particular under different groups of anchoring claws at different core cross-sections along the anchoring portion. The teaching according to the invention achieves the advantage that the implant is uniformly loaded over its entire longitudinal extension at each core cross section, or it is equally possible to introduce a load over the core cross section into the surrounding jawbone.

According to a further exemplary embodiment, the implant further has the fact that the anchoring claws, which are each arranged on a common core cross section on the core circumference, are arranged uniformly distributed over the full circumference of the core. In other words, it is meant here that all provided anchoring claws have the same distance to the respective adjacent anchoring claw at a common core cross section. The teaching according to the invention achieves the advantage that, as a result, a more uniform introduction of a force acting on the implant, viewed over the circumference of the circumference, can continue to take place.

According to a further exemplary embodiment, the implant further comprises that the anchoring claws extend from the elongated core orthogonally or in an angle (β) inclined in the direction of the implant stump. By the teaching according to the invention the advantage is achieved that thereby the application of the anchoring claw is favored according to the hinge effect of the connection of the claw base to the core and also an erection of the anchoring claw in the jawbone, in particular the force with which the anchoring claw straightens, can be selectively influenced ,

According to a further exemplary embodiment, the implant further comprises that the anchoring claws viewed in the circumferential direction (U) have a cross section corresponding to the shape of a rectangle, a triangle, a trapezoid, a rhombus, a circular section or according to a hybrid form of the aforementioned forms. The teaching according to the invention provides the advantage that the anchoring claws correspond to the forces occurring on insertion of the implant in an axial direction into the jawbone on the anchoring claws from the outer tip or the projecting free end of the anchoring claws to the claw base accordingly Measures yielded and in a partial to complete deflection of the anchoring claw can derive.

According to a further exemplary embodiment, the implant further comprises that the anchoring claws viewed in the longitudinal direction (L) have a cross-section corresponding to the shape of a rectangle, a triangle, a trapezoid, a circle segment or according to a hybrid form of the aforementioned forms. The teaching according to the invention affords the advantage that the cross-section viewed in the longitudinal direction of the implant, in particular its outer surfaces, have a specifiable influence on whether and how strongly the anchoring claws can absorb or counteract the rotational forces acting on the implant.

According to a further exemplary embodiment, the implant further has, that the anchoring claws viewed in the longitudinal direction (L) have a cross section, which is formed to form an edge by two contacting circular sections, each having different curvatures. By the teaching according to the invention the advantage is achieved that an enlarged surface for the growth of the bone is provided by the two circular sections and at the same time a cutting of the anchoring claw in the open bone material, when inserting the implant, is avoided by sharp protruding edges. Furthermore, the edge is preferably created by virtue of the fact that the two circular sections have a different radius of curvature and / or have an offset relative to one another.

According to a further exemplary embodiment, the implant further comprises that the anchoring claws at least in sections a surface, in particular a substantially planar surface, which is arranged in or against the circumferential direction (U). The teaching according to the invention achieves the advantage that a radially directed contact surface, which counteracts rotation along or against the direction of rotation of the implant and thus protects the bone material from injury, is provided by the surface provided in sections, preferably an edge formed.

According to a further exemplary embodiment, the implant further comprises that a distance between the anchoring claws at a common core cross section at the core circumference defines a region of the core circumference which is wider than a predetermined width of the anchoring claws. The teaching according to the invention affords the advantage that the effect of a lateral outer surface of the anchoring claws against rotation of the implant is thereby influenced in an advantageous manner when a stable bone structure is arranged laterally of the anchoring claws.

According to a further exemplary embodiment, the implant further comprises that the anchoring claws along the circumferential direction (U) viewed the core having a width in the range of 0.25 mm to 0.7 mm, preferably in the range of 0.35 mm to 0, 46 mm, contact. The teaching according to the invention has the advantage that the preferred widths of the claw base of the anchoring claws make it possible to be able to adapt the design of the implant to the tooth to be replaced and / or in particular to the area of the jawbone.

According to a further exemplary embodiment, the implant further comprises that the anchoring claws are adapted to resiliently yield by contact with a wall of a bore in a jawbone when introduced into the bore in the direction of the implant stump. The teaching according to the invention affords the advantage that when the implant is inserted into a predrilled opening in the jawbone, the anchoring claws do not cut into the exposed soft bone material in the area of the wall of the bore and, if appropriate, bring about further destabilization of the surrounding bone material.

According to a further exemplary embodiment, the implant further comprises that the material is a polyetheretherketone (PEEK). The teaching according to the invention has the advantage that polyetheretherketone, also referred to as PEEK for short, has proven to be a particularly advantageous plastic for use in implants. By manufacturing the implant by means of a plastic molding process, in particular an injection molding process, from the material PEEK, the advantages of a simple and inexpensive producibility of the implant together with the medical, sterile properties and the property of a comparatively good healing ability are also attributed to the implant.

According to a further exemplary embodiment, the implant further comprises that the implant stump facing the end of the anchoring portion at least partially has a curved conicity or a substantially barrel-shaped, in particular asymmetric barrel-shaped course. Due to the teaching of the invention, the advantage is achieved that too deep sinking of the implant in the jawbone can be prevented by the taper and at the same time an advantageous healing or advantageous growth of the newly formed bone material in the transition region is favored.

According to a further exemplary embodiment, the implant further comprises that the end of the anchoring portion facing the implant stump is or are provided with one or more circumferential grooves and a circumferential groove on the implant stump. The teaching according to the invention provides the advantage that the surface for growth and healing of the jawbone is enlarged by the preferably five circumferential grooves, again preferably with different opening cross-sections, and a better holding force can be accommodated in the jawbone through the lateral edges of the circumferential grooves. The one circumferential groove in the implant stump, preferably in the area of contact of the implant stump with the anchoring section, can advantageously serve for temporary attachment of a healing abutment during a healing period and for temporary and / or permanent attachment of a dental prosthesis. Corresponding gingiva formers can be detachably fastened in the circumferential groove of the implant stump, preferably by clipping. A final denture, however, is preferably fixed by means of an adhesive or a cement used in dental technology.

A method for producing an implant according to one of the previously described embodiments is, for example, an injection molding method. The teaching according to the invention provides the advantage that the implant to be produced can be produced by automated injection molding with simple means in high quantities and at lower costs.

Hereinafter, an exemplary embodiment of the method will be explained.

• a) Schließen einer Spritzgussform,
• b) Befüllen der Spritzgussform mit dem Material des Implantats,
• c) Abkühlen der Spritzgussform, bis das gespritzte Implantat eine zum Auswerfen des Implantats ausreichende Festigkeit erlangt hat,
• d) Öffnen der Spritzgussform, wobei die Teile der Spritzgussform sternförmig und im Wesentlichen in radialer Verlängerung der jeweiligen Verankerungskrallen auseinander gefahren werden,
• e) Auswerfen des Implantats.

According to a first exemplary embodiment, the method further comprises that the injection molding process has the following repeatable steps:

• a) closing an injection mold,
• b) filling the injection mold with the material of the implant,
• c) cooling the injection mold until the injection-molded implant has achieved sufficient strength to eject the implant,
• d) opening the injection mold, wherein the parts of the injection mold are moved apart in a star shape and essentially in the radial extension of the respective anchoring claws,
• e) Ejecting the implant.

The teaching according to the invention affords the advantage that the formation of shear forces and / or rotational forces and / or tensile forces on, in particular, the anchoring claws are avoided by the star-shaped, or in particular also jet-shaped, moving apart of the mold parts and the anchoring claws thus become lighter from their respective cavities let the injection mold loosen.

Before describing embodiments of the invention in more detail with reference to drawings, it should first be noted that the invention is not limited to the described components. Furthermore, the terminology used is not a limitation, but has only exemplary character. Insofar as the singular is used below in the description and the claims, the plural is included in each case, unless the context explicitly excludes this.

The figures show:

1 a perspective view of a proposed implant using the example of a dental implant according to an exemplary embodiment of the invention;

2 a sectional view of the in 1 illustrated dental implant;

3 a schematic representation of a portion of the implant using the example of a dental implant according to an exemplary embodiment of the invention;

4 a schematic side view of the implant using the example of a dental implant according to an exemplary embodiment of the invention;

5 a sectional view of a part of in 4 illustrated dental implant;

6 a plan view along the longitudinal direction (L) of in 4 illustrated dental implant;

7 a representation of a cross section perpendicular to the longitudinal direction (L) of in 4 illustrated dental implant;

8th schematic representations of possible cross-sectional shapes a) to f) of the anchoring claws according to exemplary embodiments of the invention;
and

9 schematic representations of possible longitudinal sections a) to f) of the anchoring claws according to exemplary embodiments of the invention.

1 shows a perspective view of a proposed implant using the example of a dental implant according to an exemplary embodiment of the invention. It shows 1 a dental implant 1 comprising an elongate, in the longitudinal direction L along a longitudinal central axis A extending anchoring portion 2 and an implant stump 4 , The dental implant 1 is at least partially made of implantable material. This material is preferably an implantable polyetheretherketone (PEEK), more preferably the commercially available and marketed under the trade name PEEK-OPTIMA plastic. The implant according to the invention can be slightly adapted to a prepared bore in the jawbone by the respective expert, in particular a dentist and / or maxillofacial surgeon, who implant it with a patient using appropriate tools, such as a milling cutter or a file. In particular, the implant is adaptable in length to a respective position in the jawbone, depending on the jaw, whether upper jaw or lower jaw, and depending on the tooth to be replaced, whether an incisor, a canine or a posterior molar, different depths of the existing Jawbone are given. In this case, however, in order not to reduce the load capacity and stability of the healed implant, a length of the anchoring portion 2 of preferably at least 6 mm remain.

The anchoring section 2 of the dental implant according to the invention 1 further comprises an elongated, preferably substantially cylindrical and / or stepped cylindrical and / or conically shaped, core 5 on, from which in the longitudinal direction L and in the circumferential direction U distributed more anchoring claws 6 out. Here, at least one, but preferably exactly three, anchoring claws are on a common core cross-section at the core circumference 6 arranged. According to another inventive idea, the elongated core 5 the anchoring section 2 further distributed over the circumference, in particular evenly distributed, at least three, preferably exactly three, extending in the longitudinal direction L flats 7 on. The number of flattenings 7 is particularly preferred the number of anchoring claws arranged in a row 6 customized. The anchoring claws 6 are here in particular with a respective claw base 26 on the flats 7 arranged, with the areas 8th the core circumference in the circumferential direction (U) between the flats 7 are left free.

In addition, the representation of 1 be taken that the defined area 8th the core perimeter between the anchoring claws 6 , preferably wider than a predetermined width 9 the anchoring claws 6 is.

2 shows a sectional view along in l shown section plane II-II based on an exemplary embodiment of the dental implant. It shows 2 that the anchoring claws 6 are set, by contact with a wall, not shown, a hole in a jawbone or generally an opening of the jawbone, when inserted into the bore in the direction of the implant stump 4 yield resiliently. This yielding can be achieved by the respective execution of the shape of the anchoring claws 6 favored or even inhibited. According to a further inventive idea, it may be preferred that the between the longitudinally L adjacent anchoring claws 6 formed free space has a viewed in the radial direction cross-sectional profile, which extends from the core 5 away, expands radially outward and / or remains constant. In other words, it is not intended that the cross-sectional shape tapers.

3 shows a schematic representation of a partial section of the implant using the example of a dental implant according to an exemplary embodiment of the invention. It shows 3 the three anchoring claws 6 ; 11.1 . 11.2 . 11.3 which in a group 11 are summarized. The three anchoring claws 11.1 . 11.2 . 11.3 the group 11 are arranged on a dashed lines, common core cross section distributed on the core circumference. Each arranged on a common core cross-section on the core circumference anchoring claws 6 ; 11.1 . 11.2 . 11.3 which in particular in a group 11 are summarized, are uniform.

Further is 3 to see that the anchoring claws 6 in one in the direction of the implant stump 4 inclined angle β from the elongated core 5 out. The angle β is preferably less than or equal to 90 °. Likewise, the flattenings 7 , as well as the anchoring claws thereon 6 along the illustrated sectional plane of the core circumference at an angle α of 120 ° to each other. For designs with more or less than three flats 7 the angle α is generally 360 ° divided by the number of flats 7 :
(α = 360 ° / x, where x = number of flats 7 )

The angle α thus generally defines the angle between a flat 7 to the two respective flats adjacent the core perimeter 7 ,

The distance between the respective adjacent to a common core cross-section on the core circumference anchoring claws 6 defines in particular an area 8th the core circumference, which is preferably wider than a predetermined width 9 the anchoring claws 6 , The width 9 with which the anchoring claws 6 the core 5 , when viewed along the circumferential direction U, contact, is in the range of 0.25 mm to 0.7 mm, preferably in the range of 0.35 mm to 0.46 mm.

4 shows a schematic side view of the implant using the example of a dental implant according to an exemplary embodiment of the invention. It shows 4 that on the implant stump 4 facing the end of the anchoring section 2 according to the illustrated embodiment five circumferential grooves 23 are provided and on the implant stump 4 another circumferential groove 24 is provided. The respective version of the circumferential grooves 23 . 24 are in the enlarged section in 5 described in more detail.

5 shows a sectional view of a part of in 4 illustrated exemplary embodiment of the dental implant. It shows 5 in detail, that the implant stump 4 facing the end of the anchoring section 2 a curved conicity 22 or in other words a substantially barrel-shaped, in particular asymmetric barrel-shaped course 22 having. The implant stump 4 facing the end of the anchoring section 2 in this case has at its thickest point a diameter which is preferably greater than the diameter of the core 5 , As a result, the circumferential grooves 23 at the in the direction of the anchoring portion 2 inclined and tapered part of the implant stump 4 facing the end of the anchoring section 2 arranged, making these as more contact surface with the jawbone in the area of a prepared hole for the dental implant 1 serves and the jawbone when healing the dental implant 1 advantageously better to the material of the dental implant 1 and in particular in the circumferential grooves 23 as well as between the anchoring claws 6 located area along the flats 7 can grow in by forming new bone material.

6 shows a plan view along the longitudinal direction (L) of in 4 illustrated exemplary embodiment of the dental implant. On the other hand shows 7 a representation of a cross section perpendicular to the longitudinal direction (L) of in 4 illustrated exemplary embodiment of the dental implant. Because of the great agreement between the two representations of 6 and 7 , these will be described together below.

The showed 6 and 7 again in detail that each arranged on a common core cross-section at the core circumference anchoring claws 6 evenly distributed over the full circumference of the core 5 are arranged, as in particular also in 3 with respect to the angle α. Furthermore, the illustration of the 6 and 7 to realize that the anchoring claws 6 with their respective claw base 26 each centered in the circumferential direction U on the flats 7 are arranged. According to another inventive idea, have the anchoring claws 6 in the longitudinal direction L views a cross section, which forms an edge 18 by two contacting circular sections 19 , in particular with in each case different curvatures 20a . 20b , is formed. Another inventive idea provides that the at least one anchoring claw 6 viewed in the longitudinal direction L has a cross section which at one of the core 5 removed region has a deviating from an imaginary circumference course. In other words, it is intended that the substantially round cross-sectional shape of the core considered in the longitudinal direction L be 5 or the implant stump 4 from those on the flats 7 outgoing anchoring claws 6 is broken, since these protrude in cross-section in particular radially outward.

• a) Dreieck,
• b) Viertelkreis oder Kreisausschnitt,
• c) Rechteck,
• d) Trapez,
• e) Halbkreis,
• f) zwei sich stirnseitig kontaktierende Kreisabschnitte,
• g) einer Mischform aus c) und f).

8th shows schematic representations of various possible cross-sectional shapes a) to f) of the anchoring claws 6 according to exemplary embodiments of the invention. It shows 8th the anchoring claws 6 viewed in the longitudinal direction L with a cross section corresponding to the following different forms:

• a) triangle,
• b) quadrant or circle section,
• c) rectangle,
• d) trapeze,
• e) semicircle,
• f) two circular sections contacting the front side,
• g) a mixed form of c) and f).

The cross-sectional shape f) of the anchoring claw 6 is viewed in the longitudinal direction L to form an edge 18 each with different curvatures 20a . 20b comprising quarter circles.

The different cross-sectional shapes according to 8th preferably have an at least partially a surface 21 , in particular a substantially planar surface 21 , which is arranged in or against the circumferential direction U.

• a) Rechteck,
• b), c) Dreieck,
• d) Raute,
• e) Trapez,
• f) Kreisabschnitt,

oder entsprechend einer Mischform aus den vorgenannten Formen. 9 shows schematic representations of various possible longitudinal sections a) to f) of the anchoring claws according to exemplary embodiments of the invention. It shows 9 the anchoring claws 6 in the circumferential direction U considered with a cross section, according to the following different forms:

• a) rectangle,
• b), c) triangle,
• d) rhombus,
• e) trapeze,
• f) circle section,

or according to a mixed form of the aforementioned forms.

Although the invention has been described in detail in the drawings and the foregoing description, the illustrations are illustrative and exemplary and not limiting. In particular, the choice of the proportions of the individual elements shown in the drawing should not be construed as necessary or restrictive. Furthermore, the invention is not limited in particular to the illustrated embodiments. Other variants of the invention and their execution will become apparent to those skilled in the art from the foregoing disclosure, the drawings and the claims.

Terms used in the claims, such as "comprising," "having," "including," "containing," and the like, do not exclude other elements or steps. The use of the indefinite article does not exclude a majority. A single device can perform the functions of several units or devices mentioned in the protection claims.

LIST OF REFERENCE NUMBERS

1

dental implant

2

anchoring section

4

implant stump

5

core

6

anchoring claw

7

Flattening (of the core 5 )

8th

Area

9

Width (the anchoring claw)

10

Thickness (the anchoring claw)

11

group

11.1, 11.2, 11.3

Anchoring claw of the group 11

14

claw edge

15

radial distance

18

edge

19

circular sections

20a, 20b

curvature

21

surface

22

curved conicity / course

23

circumferential groove

24

circumferential groove

26

claws base

27

claws length

28

axial claw distance

L

longitudinal direction

A

Longitudinal central axis

U

circumferentially

α

angle

β

angle

γ

angle

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102011001401 A1 [0002, 0003]
• WO 2012059599 A1 [0004]

Claims (19)

Implant, in particular crestal dental implant ( 1 ) comprising an elongate anchoring portion (L) extending along a longitudinal central axis (A) ( 2 ) and an implant stump ( 4 ), wherein the implant consists at least partially of an implantable material, wherein the anchoring portion ( 2 ) an elongated core ( 5 ), of which in the longitudinal direction (L) and in the circumferential direction (U) distributed more anchoring claws ( 6 ) run roughly radially outward, characterized in that at a common core cross-section at the core circumference each exactly three anchoring claws ( 6 ) are arranged. Implant, in particular crestal dental implant ( 1 ) comprising an elongate anchoring portion (L) extending along a longitudinal central axis (A) ( 2 ) and an implant stump ( 4 ), wherein the implant consists at least partially of an implantable material, wherein the anchoring portion ( 2 ) an elongated core ( 5 ), of which in the longitudinal direction (L) and in the circumferential direction (U) distributed more anchoring claws ( 6 ) go out roughly radially outwardly, characterized in that the elongated core ( 5 ) of the anchoring section ( 2 ) distributed over its circumference, in particular evenly distributed, three in the longitudinal direction (L) extending flats ( 7 ), wherein the anchoring claws ( 6 ) with a respective claw base ( 26 ) on the flats ( 7 ), where ranges ( 8th ) of the core perimeter between the flats ( 7 ) are left free. Implant, in particular crestal dental implant ( 1 ) comprising an elongate anchoring portion (L) extending along a longitudinal central axis (A) ( 2 ) and an implant stump ( 4 ), wherein the implant consists at least partially of an implantable material, wherein the anchoring portion ( 2 ) an elongated core ( 5 ), of which in the longitudinal direction (L) and in the circumferential direction (U) distributed at least one anchoring claw ( 6 ) roughly to the outside, characterized in that the at least one anchoring claw ( 6 ) in the longitudinal direction (L) has a cross-section, which forms to form an edge ( 18 ) by two contacting circular sections ( 19 ), in particular with in each case different curvatures ( 20a . 20b ) is formed. Implant, in particular crestal dental implant ( 1 ) comprising an elongate anchoring portion (L) extending along a longitudinal central axis (A) ( 2 ) and an implant stump ( 4 ), wherein the implant consists at least partially of an implantable material, wherein the anchoring portion ( 2 ) an elongated core ( 5 ), of which in the longitudinal direction (L) and in the circumferential direction (U) distributed at least one anchoring claw ( 6 ) roughly to the outside, characterized in that the at least one anchoring claw ( 6 ) seen in the longitudinal direction (L) has a cross-section which at one of the core ( 5 ) has a deviating from an imaginary circumference course. Implant, in particular crestal dental implant ( 1 ) comprising an elongate anchoring portion (L) extending along a longitudinal central axis (A) ( 2 ) and an implant stump ( 4 ), wherein the implant consists at least partially of an implantable material, wherein the anchoring portion ( 2 ) an elongated core ( 5 ), of which in the longitudinal direction (L) and in the circumferential direction (U) distributed at least one anchoring claw ( 6 ) roughly outwardly radially, characterized in that between the longitudinally (L) adjacent anchoring claws ( 6 ) formed free space () has a viewed in the radial direction cross-sectional profile which extends from the core ( 5 ) away, not tapered radially outward. Implant according to one of claims 1 to 5, wherein the anchoring claws ( 6 ) in a group ( 11 ) are summarized, with a group ( 11 ) in each case all distributed on a common core cross-section at the core circumference arranged anchoring claws ( 6 ; 11.1 . 11.2 . 11.3 ). Implant according to one of claims 1 to 6, wherein the respectively arranged on a common core cross-section at the core circumference anchoring claws ( 6 ) are formed uniform. Implant according to one of claims 1 to 7, wherein the respectively arranged on a common core cross-section at the core circumference anchoring claws ( 6 ) evenly distributed over the full circumference of the core ( 5 ) are arranged. Implant according to one of claims 1 to 8, wherein the anchoring claws ( 6 ) orthogonal or in a direction in the direction of the implant stump ( 4 ) inclined angle (β) of the elongated core ( 5 ) go out. Implant according to one of claims 1 to 9, wherein the anchoring claws ( 6 ) in the circumferential direction (U) considered a cross section ( 16 ), corresponding to the shape of a rectangle, a triangle, a trapezoid, a rhombus, a circular segment ( 19 ) or according to a mixed form of the aforementioned forms. Implant according to one of claims 1 to 10, wherein the anchoring claws ( 6 ) in the longitudinal direction (L) have a cross-section, corresponding to the shape of a rectangle, a triangle, a trapezium, a circular section ( 19 ) or according to a mixed form of the aforementioned forms. Implant according to one of claims 1 to 11, wherein the anchoring claws ( 6 ) in the longitudinal direction (L) have a cross-section, which forms to form an edge ( 18 ) by two contacting circular sections ( 19 ), in particular with in each case different curvatures ( 20a . 20b ) is formed. Implant according to one of claims 1 to 12, wherein the anchoring claws ( 6 ) at least in sections a surface ( 21 ), in particular a substantially flat surface ( 21 ), which is arranged in or against the circumferential direction (U). Implant according to one of claims 1 to 13, wherein a distance ( 7 ) between the anchoring claws ( 6 ) at a common core cross-section at the core circumference a region ( 8th ) of the core circumference, which is wider than a predetermined width ( 9 ) of anchoring claws ( 6 ). Implant according to one of claims 1 to 14, wherein the anchoring claws ( 6 ) along the circumferential direction (U) views the core ( 5 ) with a width ( 9 ) in the range of 0.25 mm to 0.7 mm, preferably in the range of 0.35 mm to 0.46 mm. Implant according to one of claims 1 to 15, wherein the anchoring claws ( 6 ) are arranged, by contact with a wall of a bore in a pine bone when introduced into the bore in the direction of the implant stump ( 4 ) yield resiliently. An implant according to any one of claims 1 to 16, wherein the material is a polyetheretherketone (PEEK). Implant according to one of claims 1 to 17, wherein the implant stump ( 4 ) facing end of the anchoring portion ( 2 ) at least in sections a curved conicity ( 22 ) or a substantially barrel-shaped, in particular asymmetric barrel-shaped, course ( 22 ) having. Implant according to one of claims 1 to 18, wherein the implant stump ( 4 ) facing end of the anchoring portion ( 2 ) one or more circumferential grooves ( 23 ) and on the implant stump ( 4 ) a circumferential groove ( 24 ) is or are provided.

Images