WO2001050977A1

WO2001050977A1 - Construction post and fastening device for use in tooth prosthetics or implantology

Info

Publication number: WO2001050977A1
Application number: PCT/EP2001/000327
Authority: WO
Inventors: Robert Laux
Original assignee: Robert Laux
Priority date: 2000-01-13
Filing date: 2001-01-12
Publication date: 2001-07-19

Abstract

The invention relates to a construction post which is provided on a base support and which is for use in tooth prosthetics or implantology. Said construction post is constructed of two pieces consisting of a lower post part and an upper post part, whereby the parting plane between the lower post part and the upper post part is provided in the form of a oblique plane. Said oblique plane extends in an oblique manner with regard to the longitudinal axis of the construction post and forms an angle with the longitudinal axis that differs from 90°.

Description

Abutment and fastening device for dental prosthetics or implantology

8. The invention relates to an abutment and a fastening device for dental prosthetics or implantology according to the preamble of claims 1 and 8, respectively.

From DE 38 07 591 C2 a connecting element designed as a plug connection is known, with which working models of individual toothed ring or jaw segments can be connected to a model base. The connecting element comprises a connecting pin, which is connected to the working models of the segments, and a guide sleeve inserted into the model base, into which the connecting pin is to be inserted. This plug-in connection is intended to achieve a firm hold of the working models of the segments on the model base, which facilitates the processing of the working models. After editing, the segments can be removed from the model base. When assembled, the lower section of the connecting pin is in the model base, while the upper section is in the working model of the sprocket or jaw segment.

The connecting pins are made rotationally symmetrical. As a result, there is the problem that the original rotational position of the working model in relation to the model base is difficult to find again after the working model has been removed from the model base, which makes further processing of the working model difficult. A highly precise processing of the Working model can therefore not be realized with a single connecting pin or only inadequately.

Such connecting elements are also not suitable for dentures which consist of an implant to be inserted into the jaw and an attachment to be attached to the implant as a carrier of crowns or facings. With such dentures, the necessary work steps for rough and fine machining are first carried out outside the jaw, then the attachment must be attached to the implant in its final insertion position in the jaw. Here, in the final position in the patient's jaw, deviations from the pre-processing on the base support may be necessary, which can be achieved by means of rotationally symmetrical connecting pins by a slight rotation of the pin. However, as soon as the connecting pins are fixed in their final position by means of cementing or gluing, the rotational position of the crown or facing in relation to the implant can no longer be changed.

The invention is based on the problem of creating an abutment or a fastening device for dental prosthetics or implantology, which is characterized by simple, flexible handling and in particular a large scope for design with regard to the relative position of a crown or facing in Permitted with regard to the supporting implant.

This problem is solved according to the invention with the features of claims 1 and 8, respectively.

According to the innovation, the construction post is the appropriate part of a fastening device for receiving a Dental prosthesis part on a base support is constructed in two parts with an upper post part and a lower post part, between which, in the assembled position, a parting plane is defined which runs obliquely with respect to a longitudinal axis of the mounting post. The two post parts can be assembled in different angular positions with respect to the longitudinal axis of the abutment post, wherein in the different angular positions at least one post part with the longitudinal axis includes a different angle depending on the angular position.

In this way, on the one hand, the advantage can be achieved that when the lower post part is fixed on the base support, the upper post part can be moved on a funnel-shaped envelope by twisting relative to the lower post part, so that the upper post part in the various rotational positions relative to the fixed lower base support is inclined radially outwards.

In addition, if there is at least one angularly symmetrical position of the upper and lower post part, in which the longitudinal axis of each post part coincides with the longitudinal axis of the entire construction post, this angularly symmetrical position can be maintained by simultaneously rotating both post parts with respect to the base support. This offers particular advantages in the event that devices for receiving a tooth replacement part are arranged on the lateral surface of the upper post part, since these devices can be locked in the same rotational positions as the lower post part. In addition to the angularly symmetrical position of the two post parts, this also applies to any relative position in which an angle is enclosed between the two post parts.

The two post parts can preferably be in a plurality of Angular positions in the direction of rotation are locked relative to each other. For this purpose, form-locking elements are expediently provided in the region of the two adjacent end faces of the post parts, via which the post parts are to be connected in a form-fitting manner in different angular positions. The number of angular positions depends on the number of positive locking elements which are advantageously distributed uniformly over the circumference.

In a preferred embodiment, a bore running coaxially to the longitudinal axis of the abutment post is made through both post parts, into which a connecting element can be inserted in particular, which connects the tooth or jaw segment to the base support. If the connecting element can assume different rotational positions with respect to the base support, additional angular positions can be achieved for the abutment post, so that even with a small number of rotational positions between the two post parts and between the lower post part and the base support or the connecting element, an overall high position Number of rest positions between the upper post part and the base support is reached.

According to a further embodiment of the invention, it is provided that a fastening device for fastening a dental prosthetic item on a base support is designed with a connecting element as a rotation lock and at least a portion of the connecting element in the rotational direction around the longitudinal axis of the connecting element is form-fitting with the associated functional part - the dental prosthetic item or the Base beam - is connected. The two sections have different cross-sectional geometries. The different cross-sectional geometries in the upper and in the lower section of the connecting element on the one hand allow a rotationally fixed connection between the tooth or jaw segment and the base support, on the other hand it is possible to have the dental prosthetic item in a plurality or a plurality of rotational positions to be attached to the base support so that the number of possible relative angular positions of the tooth or jaw segment on the base support is increased. This extends the possible uses; In particular, it is possible to individually adjust dentures after pre-processing in the laboratory when inserting them into the patient's jaw and at the same time to maintain the rotational security. These advantages are achieved by the differing cross-sectional geometries in the two sections of the connecting element, in that each section can assume a plurality of angular positions in its segment or base support assigned to it, and due to the different cross-sectional geometries, these angular positions differ in the segment or base support , whereby the combination of the respective angular positions in the segment or in the base support results in a large number of possible variations, the number of which is calculated by multiplying the respective angular positions in each section.

The fastening device can be designed both with the construction post and without the construction post.

The positive connection in the direction of rotation of at least one section with the respectively assigned segment or base support allows the connecting element to be simply inserted and the rotational position to be changed by removing the connecting element and inserting it again in the changed angular position. However, no additional fastening mechanisms are required.

In contrast to previously common connections from the prior art, the connection element according to the invention is an independent component which is formed separately from the base support and the tooth or jaw segment. This extends the possible uses, because by replacing a connecting element with a connecting element in an alternative embodiment, different base supports and tooth or jaw segments can be combined with one another.

The positive connection in the direction of rotation between the connecting element and the dental prosthetic item or the base support advantageously takes place in that at least one section of the connecting element is provided with positive locking elements which engage in corresponding, complementarily shaped latching recesses or elevations in the dental prosthetic item or in the base support. In an advantageous embodiment, these form-locking elements, which are in particular arranged uniformly distributed over the circumference of one or both sections on the end face or the radial lateral surface, are the edges of a polygonal lateral surface, preferably in that embodiment, in which both sections have a polygonal surface, the number of edges per section differs. According to an advantageous development, it is also provided that each individual surface of the lateral surface of a section encloses an angle with each individual surface from the lateral surface of the second section in order to avoid parallel surfaces between the lateral surfaces of the two sections; this design enables a maximum number of different angular positions of the tooth or jaw segment with respect to the base support with a relatively small number of edges per section.

In an alternative, advantageous embodiment, it can also be indicated to connect only a section of the connecting element in the direction of rotation with positive locking to the dental prosthetic item or else to the base support and to form the opposite section of the connecting element with a rotationally symmetrical lateral surface, the section having tionally symmetrical lateral surface expediently has a slot which divides this section into two separate and elastically deformable parts. This makes it possible to press together the elastically deformable parts of the slotted section for insertion into a corresponding recess in the tooth or jaw segment or in the base support, the parts returning to their original position due to their elasticity after insertion into the recess and exert a radial clamping force in the recess. This creates on the one hand a firm connection between the dental prosthetic item and the base support, and on the other hand any number of different angular positions between the dental prosthetic item and the base support can be realized.

In a preferred embodiment, the fastening device comprises, in addition to the connecting element for fastening a dental prosthetic item on a base support, the two-part abutment according to the invention. This design combines the high number of different angular positions, which result from the special cross-sectional geometry of the connecting element, with the additional angular positions, which can be achieved by the different latches between the two post parts of the construction post. The total number of angular positions is calculated by multiplying the possible angular positions of the connecting element by the possible angular positions of the abutment.

The abutment and / or the fastening device can be used both in implantology and in model technology. In implantology, the base support used is identical to the implant to be inserted in the patient's jawbone. In model technology, the base support is a model implant, for example a supporting pin, which is in a plaster model base or the like is used and takes over the function of the implant.

Further advantages and expedient designs can be found in the further claims, the description of the figures and the drawings. Show it:

1 shows a section through a base support designed as an implant with a tooth crown fastened via a connecting element,

2 the connecting element in side view,

3 the connecting element in plan view,

4 shows a further connecting element in side view,

5 a further connecting element in side view,

6 a further connecting element in plan view,

7 a further connecting element in plan view,

8 shows a schematic view of two individual teeth connected via a common secondary crown, each consisting of an implant and a primary crown attached to the implant via a connecting element,

9 shows a section through a further exemplary embodiment with a two-part construction post, the lower post part of which is fixed to the base support and the upper post part of which receives a tooth segment,

10 shows a plan view of the elements seen end face of a post part,

Fig. 11 shows another embodiment with a two-part construction post.

In the following figures, the same components are provided with the same reference symbols.

1, a toothed segment 1 is held and fastened on a base support 2, the base support 2 in the exemplary embodiment being an implant which is to be inserted into the jaw of a patient. The tooth segment 1 located in the visible area is connected to the base support 2 in a rotationally fixed manner via a connecting element 3, which is part of a fastening device. Tooth segment 1, base support 2 and connecting element 3 have a common longitudinal axis 7. The connecting element 3 forms a rotation lock between the tooth segment 1 and the base support 2. The rotation lock is achieved in that the connection element 3 is held in a form-fitting manner on at least one of the parts to be connected about the longitudinal axis 7 of the tooth segment 1 or the base support 2.

The toothed segment 1 consists of a veneer or crown 5 forming the visible part and a cement or abutment post 4 supporting the crown 5, which is held directly on the base support 2 via the connecting element 3.

Furthermore, a screw 6 is provided which immovably connects the toothed segment 1 to the base support 2 axially in the direction of the longitudinal axis 7. The screw 6 is guided through a bore in the sleeve-shaped connecting element 3 and engages with its thread in a threaded blind hole in the base support 2. In this version, the connecting element also takes on a connecting function in the axial direction.

As can be seen from FIGS. 2 and 3 in connection with FIG. 1, the connecting element 3 consists of an upper section 3a, which in the assembled position is inserted into a complementarily shaped recess in the construction post 4, and a lower section 3b, which is in the 1 is inserted into a complementarily shaped recess in the base support 2. 2 and 3 show that the sections 3a and 3b of the connecting element 3 have different cross-sectional geometries. Both the upper section 3a and the lower section 3b are provided with a polygonal lateral surface, but the two sections and 3a and 3b differ in the number of edges of the lateral surface. The difference in the number of edges in the lateral surfaces of both sections is expediently exactly one; in the exemplary embodiment, the lower section 3b is designed as a hexagon, the upper section 3a, however, as a pentagon. The edges in the polygonal lateral surfaces form form-locking elements with respect to a rotation about the longitudinal axis 7 of toothed segment 1, base support 2 and connecting element 3, which are inserted into the complementarily shaped recesses in toothed segment 1 or base support 2 in the assembled position with positive locking.

The different number of edges or surfaces in the polygonal outer surface of the upper section 3a and lower section 3b offers the advantage that a multiplicity of rotational positions of the upper toothed segment 1 can be realized on the base support 2, these rotational positions each being designed as a latching position. Provided that none of the outer surfaces of the polygonal outer surface of the upper section 3a is arranged parallel to an outer surface of the lower section 3b, the number of possible locking positions of the tooth segment 1 is compared to the base support 2 equal to the product of the number of edges from the two lateral surfaces of the upper section 3a and lower section 3b. In the exemplary embodiment according to FIGS. 1 to 3, the number of latching positions when using a connecting element with an upper pentagonal lateral surface and a lower hexagonal lateral surface is a total of 30. The individual latching positions come about in that the connecting element 3 with its lower one Section 3b in the corresponding recess in the base support 2 and also with its upper section 3a in the corresponding recess in the construction post 4 can be rotated around one or more edges. Through this embodiment of the connecting element 3 with two sections with different cross-sectional geometries, a large number of possible rotational and detent positions of the toothed segment 1 relative to the base support 2 are achieved despite a geometrically simple embodiment of the connecting element.

In the exemplary embodiment according to FIG. 4, a polygonal outer surface is provided on the upper section 3a, while the lower section 3b has a cylindrical outer surface. The free end face of the lower section 3b is provided with locking teeth 9, which are arranged evenly distributed over the circumference. The teeth 9 form interlocking elements, which engage in a corresponding, complementarily designed row of teeth in the base support or in the toothed segment, which results in a toothing effecting an anti-rotation effect between the connecting element 3 and the associated component. The number of teeth 9 expediently differs from the number of edges of the polygonal lateral surface of the other section of the connecting element. In the exemplary embodiment according to FIG. 4, a central bore 8 is provided in the connecting element 3, which can serve to receive an axial connecting member.

If necessary, both sections of the connecting element provided with positive locking elements.

5, the upper section 3a of the connecting element 3 is provided with a polygonal lateral surface, while the lower section 3b has a cylindrical lateral surface. A slot 12 is made in the lower section 3b, which is arranged in particular centrally and extends in the direction of the longitudinal axis 7 of the connecting element 3 up to the upper section 3a. The slot 12 divides the lower section 3b into two parts 10 and 11, which are elastically deformable in the region of their free end face. This makes it possible to press the parts 10 and 11 together radially for insertion into a cylindrical bore. As soon as the lower section 3b is released from external forces, the parts 10 and 11 return to their starting position due to their inherent elasticity, as a result of which a radially outwardly directed clamping force is generated in the cylindrical receptacle, which securely engages the lower section 3b of the connecting element 3 the cylindrical receptacle holds. Due to the rotationally symmetrical design of the lower section 3b, in principle any number of rotational positions can be realized.

It may be expedient, if appropriate, to design one of the sections of the connecting element in a rotationally symmetrical design to be conical or conical, whereby an axial engagement of the conical or conical surface in the complementarily shaped receptacle in the direction of rotation can result in a non-positive connection which results in rotation and axial Prevents removal of the connecting element.

In a further advantageous embodiment, the interlocking elements of one section or both sections lie on the radially inner side in the hollow cylindrical, sleeve-shaped section. Finally, it may also be expedient to roughen the lateral surface of a section of the connecting element provided with the form-locking elements, in particular the lateral surface of the section facing the implant, so that the connecting element after a preliminary processing when removing the abutment in the patient's mouth due to the friction occurring in the implant sticks.

As shown in FIGS. 6 and 7, the form-locking elements can be used both as a radial recess 13 and as a radial elevation 14 in the region of the base body and / or the tooth or. Jaw segment in contact with the lateral surface may be formed in one of the sections or in both sections 3a, b. The recesses 13 or the elevations 14 engage in complementarily shaped elevations or recesses in the receiving tooth part or base body.

8 shows a further exemplary embodiment with two individual teeth, which are connected to one another via a common web. Each individual tooth consists of an implant 2 in the patient's jawbone and a primary crown 16, which is held on the implant 2 in a rotationally fixed manner via a connecting element 3 and possibly also in an axially captive manner. The primary crown 16 is designed as a cone crown with a cone angle of in particular 2 ° to 8 °. The primary crown can also be designed as a telescopic crown with parallel outer walls. The primary crown 16 has the function of an abutment; a secondary crown 15, which carries a removable denture, is placed on each of the primary crowns 16 of the individual teeth. Due to the plurality of rotational positions of each primary crown relative to the associated implant, which are made possible by the connecting element 3, simplified processing is possible in the patient's mouth and outside the mouth in the dental laboratory also better adaptation of the dentures to the patient's anatomy. This compensates for divergences from implants; a prosthetic direction of insertion can be found in any case. In the exemplary embodiment according to FIG. 8, the primary crowns are parallel to one another. In an alternative embodiment, the primary crowns can also be arranged at an angle to one another, in particular at an angle of preferably approximately 2 ° to 8 °, in particular 2 ° to 4 °, to one another.

9 and 10 show a further exemplary embodiment with a tooth segment 1 held on a base carrier 2, the tooth segment 1 advantageously being designed as a tooth crown 5 and the base carrier 2 as an implant to be inserted into the jaw of a patient. The toothed segment 1 is held on the base support 2 by means of a fastening device, which comprises a connecting element 3, a construction post 4 and a screw 6. The fastening device has the longitudinal axis 7, which is also the longitudinal axis of the toothed segment 1 and the base support 2.

The abutment 4 is divided into two parts with a lower post part 4a adjacent to the base support 2 and an upper post part 4b adjacent to the toothed segment 1. In the assembled position, the two post parts 4a and 4b have a parting plane 18 which runs obliquely and with which the longitudinal axis 7 encloses an angle deviating from 90 °. The angle of the parting plane 18 with respect to a plane running vertically to the longitudinal axis 7 is advantageously a maximum of 20 °, 10 ° or 12.5 ° being particularly advantageous.

The lower post part 4a and the upper post part 4b are expediently positively connected in the rotational direction about the longitudinal axis 7 in the assembled position. To do this, they point to each other facing end faces of the post parts 4a and 4b form-fitting elements, consisting of elevations 17 (see FIG. 10) on one post part 4a and complementarily shaped recesses in the other post part, in which the elevations 17 can be inserted. In accordance with the number of positive locking elements which are advantageously distributed uniformly over the circumference, the post parts 4a and 4b can assume different discrete relative angular positions with respect to one another; In the exemplary embodiment, eight form-locking elements are provided, so that the two post parts can be locked against one another in eight different rotational positions.

It may be expedient to offset the interlocking elements by a certain angular amount, for example 2 ° to 4 °, with respect to the symmetrical position shown in FIG. 10, which results in additional adjustment options compared to the symmetrical arrangement.

The connecting element 3 connects the lower post part 4a of the abutment 4 with the base support 2 in a positive-locking manner in the direction of rotation about the longitudinal axis 7. A screw 6 is inserted into a central bore of the connecting element 3 and secures the fastening device on the base support 2 in the axial direction. The head of the screw 6 is designed as a spherical head and expediently lies in the axial direction in a form in a bore 19 which extends through the upper post part 4b and - with a smaller diameter - through the lower post part 4a, so that both post parts 4a and 4b over the screw 6 are held axially on the base support 2.

Due to the spherical shape of the head of the screw 6, axial securing with the help of the screw is possible regardless of the rotational position of the screw. The upper post part 4b can also be used when the screw is inserted but not yet firmly tightened. be 6 released from its locking position, rotated by a desired angular amount and locked in a new rotational position; at the same time, the screw 6 used guarantees that the components of the fastening device cannot be lost.

The connecting element 3 advantageously has two sections with different cross-sectional geometries, which allow a plurality of different rotational positions of the abutment 4 and therefore also of the toothed segment 1 relative to the base support 3. In addition to the rotational positions that can be achieved by the different cross-sectional geometries in the two sections of the connecting element, further rotational positions can be set relative to one another by rotating the two post parts; overall, the number of all possible rotational positions of the toothed segment 1 in relation to the base support 2 corresponds to the multiplication of the number of rotational positions, which originates from the connecting element 3, by the number of rotational positions that can be reached via the mounting post 4.

11 shows a further exemplary embodiment with a two-part construction post 4. The base support 2 is sleeve-shaped and has a central bore 20 into which a screw 6 for fixing the base support 2 is inserted in a plaster model base for processing an attached crown or in the jaw of a patient.

The base support 2 is connected to the lower post part 4a of the construction post 4 via the connecting element 3, the lower post part 4a being separated from the upper post part 4b via the parting plane 18 designed as an inclined plane. The angle of the parting plane 18 with respect to a horizontal, which includes a 90 ° angle with the longitudinal axis 7, is approximately 10 °. The lower post part 4a and the upper post part 4b are positively connected to one another via elevations 17 and complementarily shaped recesses. The upper post part 4b likewise has a central bore 19 which, however, widens conically upwards - on the side facing away from the lower post part 4a, as a result of which, in particular in those angular positions of the upper post part 4b relative to the lower post part 4a in which the bore 19 in the upper post part is eccentric to the longitudinal axis 7, a sufficiently large access area from above is ensured in the bore 19 and the screw 6 can be inserted into the bore 20 in the base support 2 without collision. The cone angle of the upper bore 19 is expediently chosen in such a way that the angle of the parting plane 18 can be at least compensated for in any relative position from the lower to the upper post part 4a or 4b, so that the inner surface of the bore 19 is at least parallel to the longitudinal axis 7, if necessary aligned in any position, expanding conically and the screw 6 can be inserted without any problems.

11, it may be expedient to insert the abutment 4 in the opposite direction into a template 21 which takes over the function of the base support and is used in particular to drill holes in the patient's jaw with high precision. In this case, the upper post part 4b is firmly received in the template 21, whereas the lower post part 4a protrudes from the template 21. To drill holes, the template 21 including the abutment 4 is inserted into the patient's mouth, positioned and fixed in the desired position, and the drill is inserted through the lower post part 4a and through the entire abutment 4 to complete the hole in the jaw of the patient Patient. Due to the inclined parting plane 18 between the lower and upper post part 4a or 4b, a relative rotation between the two post parts len a plurality of angular positions are set, under which the central recess in the lower post part 4a is aligned relative to the longitudinal axis 7. Depending on the relative angular position of the two post parts 4a and 4b, bores can be made in the jaw at different angles to the jaw plane, the conical extension adjacent to the jaw in the post part 4b ensuring a collision-free movement of the drill in this post part.

In an expedient development, a sleeve 22 is integrated into the template 21, into which the upper post part 4b is detachably inserted and in particular is held with friction, but possibly also with a positive fit. This embodiment offers the advantage of an additional rotational degree of freedom of the upper post part 4b in the sleeve 22. Because of the detachable connection, the abutment post can also be reinserted into a base support designed as an implant or as a model implant, which provides additional uses for the construction posts are given.

Due to the functionally identical structure of the template for making the holes and the abutment as a support for the dentures, oblique-angled holes can be completely compensated for by complementary positions of the post parts.

Claims

claims

1. Abutment on a base support in dental prosthetics or implantology, characterized in that the abutment (4) is constructed in two parts with a lower post part (4a) and an upper post part (4b) and that the parting plane (18) between the lower post part (4a) and the upper post part (4b) is designed as an inclined plane which extends obliquely with respect to the longitudinal axis (7) of the mounting post (4) and forms an angle with the longitudinal axis (7) which deviates from 90 °.

2. Abutment according to claim 1, so that the outer surface of the abutment (4) is formed in exactly one assembly position of the upper and lower post part (4a and 4b) rotationally symmetrical to the longitudinal axis (7).

3. Construction post according to claim 1 or 2, characterized in that the lower post part (4a) and the upper post part (4b) in the direction of rotation about the longitudinal axis (7) of the construction post (4) are to be connected to one another in a rotationally secure manner.

4. Construction post according to claim 3, so that the lower post part (4a) and the upper post part (4b) can be positively locked.

5. assembly post according to claim 4, d a d u r c h g e k e n n e e c h n e t that in a post part (4a or 4b) evenly distributed elevations (17) are provided which engage in the locking position in complementary recesses in the other post part (4b or 4a).

6. Abutment according to one of claims 1 to 5, d a d u r c h g e k e n n z e i c h n e t that in the post parts (4 a and 4 b) a coaxial to the post longitudinal axis (7) bore (19) for receiving a connecting element (3) is introduced.

7. Abutment post according to claim 6, so that the bore (19) widens conically at least over the length of the upper post part (4b).

8. Fastening device for fastening a dental prosthetic item on a base support, in particular using a construction post according to one of claims 1 to 7, with a connecting element (3) which one of the base support (2) assigned Neten section (3b) and a section (3a) assigned to the tooth replacement part (1), characterized in that the connecting element (3) is designed as a rotation lock, that at least one section (3a, 3b) of the connecting element (3) in the direction of rotation around the Connecting element longitudinal axis (7) is positively connected to the dental prosthetic item (1) or the base support (2) such that the cross-sectional areas of the two sections (3a, 3b) have a cross-sectional geometry that differs from one another.

9. Fastening device according to claim 8, so that at least one section (3a, 3b) is provided with interlocking elements.

10. Fastening device according to claim 9, so that several form-locking elements are provided per section (3a, 3b).

11. Fastening device according to claim 10, characterized in that the positive locking elements are arranged distributed uniformly over the circumference of the section (3a, 3b).

12. Fastening device according to one of claims 9 to 11, d a d u r c h g e k e n n e z e i c h n e t that both sections (3a, 3b) have positive locking elements.

13. Fastening device according to claim 12, so that the angular distances between form-locking elements of one section (3a, 3b) differ from the angular distances between closing elements of the other section (3b, 3a).

14. Fastening device according to one of claims 9 to 13, d a d u r c h g e k e n n z e i c h n e t that the positive locking elements are designed as a polygonal lateral surface.

15. Fastening device according to claim 14, so that the two sections (3a, 3b) have a polygonal lateral surface, but differ in the number of edges.

16. Fastening device according to claim 15, characterized in that the number of edges in the lateral surfaces of both sections (3a, 3b) differs by the value one.

17. Fastening device according to claim 15 or 16, so that each individual surface of the lateral surface of a section (3a, 3b) encloses an angle with each individual surface of the second section (3b, 3a).

18. Fastening device according to one of claims 8 to 17, so that a section (3b) has at least two, elastically deformable parts (10, 11) separated by a slot (12).

19. Fastening device according to one of claims 8 to 18, so that a portion (3a, 3b) has a hexagonal outer surface.

20. Fastening device according to one of claims 8 to 19, so that the second section (3b) has a rotationally symmetrical lateral surface.

21. Fastening device according to one of claims 8 to 20, characterized in that the connecting element (3) is annular or sleeve-shaped with a longitudinally extending, continuous through-bore (8).

22. Fastening device according to claim 14, so that the polygonal outer surface of at least one section (3a, 3b) is the outer jacket of the connecting element.

23. Fastening device according to one of claims 1 to 22, that the base support (2) is an implant.

24. Fastening device according to one of claims 8 to 23, characterized in that the section (3a) of the connecting element (3) facing away from the base support (2) is received in a cementing or building post (4) or in a cone or telescopic crown, which carrier is for a crown (5) or facing.