DE102017116157A1 - Two-piece dental implant system - Google Patents

Abstract

A two-part dental implant system (1) comprising an implant body (2) and an abutment (3) is to be characterized in that the abutment (3) comprises a spring edge (4) which is set up in order to connect the implant body (2). and abutment (3).

Description

Technical area

The invention relates to a two-part dental implant system according to the preamble of claim 1.

State of the art

Such two-part dental implant systems are already known and widely used in a variety of forms and configurations. They usually include an implant body and an abutment.

The implant body is the actual implant, ie the component which replaces the tooth root and is introduced into the jawbone.

The abutment, also referred to as implant abutment, can be a post, which is connected to it via a section of the implant body projecting from the patient's jaw or at least accessible from the outside. The implant body and the abutment can be screwed or glued together, for example.

Usually, a replica of the tooth to be replaced implant crown, also called superstructure, placed on the abutment or connected to this.

A disadvantage of known two-part dental implant systems on the one hand, that bacteria can get into a space between the implant body and abutment and multiply there.

If the implant body and the abutment are connected to one another by screwing together, then the disadvantage of known two-part dental implant systems is that the screw connection is released or the abutment is not held securely on the implant body.

Another disadvantage of known two-part dental implant systems is that they usually can not be designed as a so-called reduced implant, in which a diameter of the implant body is a maximum of 4 mm.

Object of the invention

The object of the present invention is to overcome the disadvantages of the prior art.

Solution of the task

To achieve the object, the features according to claim 1.

Advantageous embodiments are described in the subclaims.

An inventive two-part dental implant system (hereinafter referred to as "dental implant system") comprises an implant body and an abutment. The abutment includes a spring edge which is adapted to spread open upon connection of the implant body and the abutment.

The implant body may be formed as a bolt or screw. If it is designed as a screw, it includes an external thread for anchoring in the jawbone of a patient.

If, for example, the implant body and the abutment are connected to one another by screwing together, the spring edge can be set up so that it spreads open shortly before the end of the Verschaubungs operation. This spreading is preferably effected by a section of the implant body coming into operative connection with the edge of the spring.

The spreading of the spring edge results, on the one hand, in a tension or force which is directed against a force to be applied when connecting the implant body and the abutment. Thus, an advantageous adhesion between the implant body and abutment is achieved.

The spreading of the spring edge further causes a partially existing space between the implant body and abutment is sealed in known dental implant systems, so that, for example, no bacteria can penetrate into this space. Corresponding coordinated embodiments of implant body and abutment also make it possible that no gap occurs at all. In any case, the edge of the spring preferably lies so tightly against a section of the implant body that no space accessible to bacteria remains between the spring edge of the abutment and the implant body.

The spreading is preferably carried out to such an extent or extent that the aforementioned functions are met, but the material of the abutment is not stretched so that there is a risk that it breaks.

The extent and extent of the spreading is dependent on the specific Design of the dental implant system, its dimensions and the location at which the deflection is measured. At a subsequently explained on the jaw side edge of the abutment or the spring edge may be thought that the spreading is measured as deflection or distance from an imaginary central longitudinal axis in the range of a few hundredths to less than tenths of a millimeter. However, it may also be thought of embodiments in which spreading by a few micrometers provides the desired functions.

Preferably, the implant body of the dental implant system comprises a complementary section, which is configured substantially complementary to at least a portion of the spring edge of the abutment. The complementary portion may thus be configured either complementary to a portion of the spring edge or complementary to the entire spring edge.

The complementary portion may be a substantially concave and preferably circular in cross-section portion, such as a groove, which is substantially complementary to a substantially convex and preferably also in cross-section also circular portion of the spring edge is formed. Numerous other combinations are conceivable.

The complementary section of the implant body causes the abutment to be guided and centered during insertion through the segments that are in operative connection with one another and that are designed to be complementary to one another. Further, the complementary portion of the implant body, in conjunction with the corresponding portion of the abutment, effectively seals against bacteria, assists in the desired traction, and supports the abutment so that it is stably held and able to absorb forces occurring when buying.

Due to the aforementioned embodiment, the gap between abutment and implant body is sealed or even completely avoided when a variable load occurs, since the spring edge of the abutment similar to a rubber lip deformations and movements of the abutment, which occur for example during chewing, continue close to the complementary portion of Implant body rests.

In all embodiments of the present invention, it may be contemplated that the spring edge at one location has an inner diameter that is smaller than an outer diameter at a location of the complementary portion associated with the location of the spring edge in the assembled condition. Such a configuration achieved in a simple manner, the aforementioned advantages in terms of sealing against invading bacteria and with regard to the frictional connection, which prevents detachment of the connection between the implant body and abutment.

In the context of the present invention, the assembled state means that the abutment and the implant body are connected to one another as is the case when inserted, ie when the dental implant system is used to supply a patient in its jaw and ready to receive the superstructure is.

The aforementioned location of the spring edge may be a circular section. Preferably, it is the edge of the abutment on the jaw side in the inserted state. The aforementioned location of the complementary portion may also be a circular portion.

The abovementioned locations of the spring edge and of the complementary section are associated, for example, when they lie in the assembled state in the same imaginary cross-sectional plane which runs transversely to an imaginary longitudinal axis of the dental implant system and approximately parallel to the patient's jaw plane.

Of course, it can also be thought that several points of the spring edge each having an inner diameter which is smaller than an outer diameter of those points of the complementary portion, which are assigned to the aforementioned locations of the spring edge in the assembled state. Furthermore, it can also be thought that this applies to the entire spring edge, and this thus has at all points a diameter which is smaller than the outer diameter of the respectively assigned points of the complementary portion.

It may be thought that the abutment is made of a plastic. This may be thought of PEEK (polyetheretherketone), for example. In addition, it may be thought of other plastics, plastic mixtures and fiber composite materials. All known in the field of dental implantology or suitable for this area materials, especially plastics, can be used as long as they allow the spreading of the spring edge and are not so brittle that they break, rather than spread. Here, for example, be thought of suitable ceramic materials such as ceramic fiber composites.

If the abutment is made of PEEK or a material with similar elastic properties, the abutment further provides a damping function. For example, forces occurring during chewing are absorbed by the abutment as it deforms. Thus, it is prevented that the parts of the dental implant system break with appropriate application of force, for example during chewing, which would be conceivable when using brittle materials.

The implant body may be made of any material which is known from the field of dental implantology or is suitable for the production of implant bodies.

Since the present invention is preferably used in the so-called metal-free dental implantology, where in particular the materials titanium and gold is dispensed with, it may be conceivable to manufacture the implant body from a plastic, for example a fiber-reinforced thermoplastic, or from a ceramic material which, for example, zirconium oxides and / or may include magnesium minerals. This may be thought of zirconia and / or magnesium nitride, for example.

The implant body may be associated with a threaded rod portion, wherein the abutment is associated with a complementary internal thread. The threaded rod section may, for example, be a pin-shaped section with an external thread connected in any manner with the implant body, which protrudes out of the implant body in order to be received by the internal thread of the abutment. The implant body may be formed integrally with the threaded rod portion. The threaded rod section may alternatively be introduced after its manufacture in the implant body. After the implant body has been inserted into the jaw of a patient, the abutment can be screwed onto the threaded rod section.

Alternatively, it may be thought to associate the implant body in place of the threaded rod portion a connection partner of a bayonet fitting, wherein the abutment is assigned according to the complementary connection partner of the bayonet fitting. After the implant body has been inserted into the jaw of a patient, the abutment can be connected via its associated connection partner of the bayonet with the connection partner of the bayonet fitting, which is associated with the implant body to make a connection between the implant body and abutment. The connection partners of the bayonet closure can be the female and male connection partners of known bayonet closures, which either comprise at least one slot-shaped recess or at least one pin.

Both the embodiment of the implant body comprising the threaded rod section and the embodiment comprising the connection partner of a bayonet closure make it possible to reduce the reduced diameter implant body, i. less than or equal to 4 mm. For example, can be thought of a diameter between 2 and 4 mm.

Both the aforementioned embodiment of the dental implant system, in particular the threaded rod section and the connection partner of the bayonet lock allow such small diameter, because, for example, not as in known two-part implants, a screw is necessary to define the abutment on the implant body. Of course, the diameter can also be greater, which can be thought of all the diameter of known dental implant systems. So far, however, there has been a problem in dental implantology that reduced diameter dental implant systems could not be designed as two-part dental implant systems because they were not sufficiently stable. This problem is eliminated by the aforementioned embodiments.

According to an alternative embodiment, the implant body comprises an internal thread for receiving an external thread of a screw, wherein the abutment comprises a recess for receiving the screw. The recess is preferably a through-hole whose diameter, although larger at any point than the diameter of the thread of the screw, but at a location so small that the screw head is retained within the abutment. Thus, the abutment can be fixed by tightening the screw on the implant body. To assemble the abutment, the screw is inserted into the recess and screwed its thread into the internal thread of the implant body.

It may be thought that the screw is made of a plastic or ceramic material. Thus, unlike known screws for use with dental implant systems, which are often made of titanium or gold, a metal-free screw is provided which enables the provision of a metal-free dental implant system. Furthermore, a screw made of a plastic or ceramic material, for example of a ceramic composite material or a fiber-reinforced plastic or PEEK a damping function which has already been explained in relation to the abutment.

The internal thread can be introduced into the implant body in any way. For example, the thread can be milled or cut into the implant body, this is especially true if the implant body is made of a fiber-reinforced plastic. The same applies to the connection partner of the bayonet closure.

Furthermore, it can be thought that a plastic sleeve with internal thread is introduced into the implant body. As an alternative to the internal thread, the plastic sleeve may comprise a connection partner of a bayonet closure, which is also preferably made of plastic. The plastic sleeve provides a damping function, i. For example, it absorbs forces occurring when buying by deforming. Thus, it does not break under any load to one of the parts of the dental implant system.

It can also be thought that the implant body and the abutment is assigned in each case a connection partner for producing a positive connection. These connection partners are preferably provided in addition to the aforementioned components and components of the implant body and abutment. For example, may be thought of a cylindrical or conical hole-pin connection. The thus provided positive connection prevents movement of the dental implant system transversely to its longitudinal direction when the abutment is screwed onto the implant body or connected to it.

It may be thought that at least a portion of the recess for receiving the screw is configured to receive a complementarily shaped screwing. The recording can be designed, for example, as a slot-shaped, polygonal or polygonal-shaped, in particular triangular Torque. It may, for example, be thought that the head of the screw, by means of which the abutment is screwed onto the implant body, is designed to be complementary to the receptacle, that is to say, for example, as a slot-shaped, polygonal or triangular torque. The screw head is then received positively within the receptacle and the tightening takes place by means of a likewise complementary designed for receiving tool.

With regard to all of the aforementioned exemplary embodiments, in each case, in addition to the screw connection, it may be thought of bonding the abutment and the implant body together in order to permanently connect the two to one another.

list of figures

• 1 ein Dentalimplantatsystem 1 gemäss einer ersten Ausführungsform der vorliegenden Erfindung in einem zusammengebauten Zustand,
• 2 und 3 das Dentalimplantatsystem nach 1 umfassend einen Implantatkörper 2 und ein Abutment 3 in einem nicht zusammengebauten Zustand,
• 4 ein Dentalimplantatsystem 1 gemäss einer zweiten Ausführungsform der vorliegenden Erfindung in einem zusammengebauten Zustand,
• 5 bis 7 das Dentalimplantatsystem 1 nach 4 umfassend einen Implantatkörper 2, ein Abutment 3 und eine Schraube 10 in einem nicht zusammengebauten Zustand,
• 8 eine Draufsicht des Implantatkörpers 2 nach 5 und
• 9 eine alternative Ausführungsform eines Implantatkörpers 2 zur Verwendung mit dem Abutment 3 und der Schraube 10 gemäss den 6 und 7.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and with reference to the schematic drawings. these show in:

• 1 a dental implant system 1 according to a first embodiment of the present invention in an assembled state,
• 2 and 3 the dental implant system after 1 comprising an implant body 2 and an abutment 3 in an unassembled state,
• 4 a dental implant system 1 according to a second embodiment of the present invention in an assembled state,
• 5 to 7 the dental implant system 1 to 4 comprising an implant body 2 , an abutment 3 and a screw 10 in an unassembled state,
• 8th a plan view of the implant body 2 to 5 and
• 9 an alternative embodiment of an implant body 2 for use with the abutment 3 and the screw 10 according to the 6 and 7 ,

embodiment

In 1 is a dental implant system 1 according to a first embodiment of the present invention in the assembled state shown in perspective. The dental implant system 1 includes an implant body 2 and an abutment 3 ,

Both ingredients are in the 2 and 3 shown separately, where 2 a perspective view of the implant body 2 and 3 a sectioned view of the abutment 3 shows.

In 1 is the abutment 3 shown transparently to the relative arrangement of the implant body 2 to the abutment 3 to make recognizable in the assembled state. The implant body may have a diameter D of 2 to 4 mm.

The implant body 2 includes a groove 5 and a threaded rod section 8th , The throat 5 can have a height H of 1 to 2 mm.

The abutment 3 includes a spring edge 4 and an internal thread 9 ,

In 4 is a dental implant system 1 according to a second embodiment of the present invention shown in the assembled state. The dental implant system 1 includes an implant body 2 , an abutment 3 and a screw 10 , These three ingredients are in the 5 to 7 shown separately. In 4 is the abutment 3 transparent and the implant body 2 as well as the screw 10 shown partially cut to the relative arrangement of the implant body 2 and the screw 10 to the abutment 3 to make recognizable in the assembled state. Also the 5 to 7 and 9 show cut or partially cut views.

The implant body 2 includes a groove 5 and a plastic sleeve 13 with internal thread 21 , There is also a plateau 15 in 5 recognizable.

The abutment 3 includes a spring edge 4 and a recess twelve , There is also a plateau 15 in 6 recognizable.

The screw 10 includes a screw head 14 and an external thread 11 ,

In 8th are the coving 5 and the plateau 15 of the implant body 2 recognizable in the plan view. The plastic sleeve 13 is indicated by dashed lines. Furthermore, it can be seen that a portion of the recess twelve as a triangular insertion aid 22 is trained.

The in 9 illustrated implant body 2 In contrast to the one in 5 illustrated implant body 2 no plastic sleeve 13 which is an internal thread 21 provides. Instead, an internal thread 21 directly into the implant body 2 incorporated. The throat 5 in the 5 and 9 illustrated implant body can be a height H from 1 to 2 mm.

Referring to the 1 to 9 explains the operation of the inventive device as follows:

The implant body 2 is used in a known manner in the jawbone of a patient. For this purpose, it may for example be provided with an external thread, which is not shown in the drawings.

Like from the 1 to 3 In summary, the dental implant system becomes 1 assembled according to the first embodiment by the internal thread 9 of the abutment 3 on the threaded rod section 8th of the implant body 2 is screwed on.

When screwing in, the spring edge spreads 4 of the implant body 3 outwards, ie in the direction of the arrows 17 in 3 ,

Both the throat 5 as well as the edge of the spring 4 have a substantially circular cross-section. The edge of the spring 4 points at one point 18a an inner diameter 6 which is smaller than an outer diameter 7 at one point 18b the throat 5 which the body 18a of the spring edge 4 is assigned in the assembled state. When screwing abutment 3 and implant body 2 spreads the edge of the spring 4 outside. As a result, on the one hand, a gap between the spring edge 4 and the throat 5 avoided. On the other hand, a traction is achieved, which prevents the abutment 3 from the implant body 2 solves.

At the places 18a . 18b they are circular sections. The circular section 19 of the implant body 2 is in the 1 and 2 indicated. As if from a comparison of 1 and 3 shows, the jobs are 18a . 18b or the circular section 19 of the implant body and the circular portion of the abutment 3 in the assembled state in the same imaginary cross-sectional plane 16 which orthogonal to the imaginary center longitudinal axis 20 runs. For better clarity, the central longitudinal axis 20 only in 1 and the imaginary cross-sectional plane 16 only in 3 located.

Out 3 goes on to say that the body 18a on a jaw-side edge of the abutment 3 located.

Due to the design of the dental implant system 1 according to the 1 to 3 , in particular by the arrangement of the threaded rod section 8th in the implant body 2 It is possible to use the dental implant system 1 diameter reduced, ie with a diameter of 2 to 4 mm, but still produce sufficient stability and resilience.

Like from the 4 to 7 In summary, the dental implant system becomes 1 assembled according to the second embodiment by the screw 10 into the recess twelve and then the abutment 3 by means of the screw 10 in the plastic sleeve 13 is screwed.

The implant body 2 may be made of a ceramic material, for example containing zirconium dioxide or magnesium nitride, or of a plastic, for example of a fiber-reinforced thermoplastic.

Alternative to the implant body 2 according to the 5 can also be the implant body 2 according to 9 come into application, which differs from the former only in that no plastic sleeve 13 is provided with internal thread, but the internal thread 21 directly into the implant body 2 incorporated, for example, milled or cut. The abutment 3 So can with the help of the external thread 11 the screw 10 both in the implant body 2 according to the 9 as well as in the implant body 2 according to the 5 be determined. The embodiment of the implant body 2 to 9 is particularly suitable if this is made of a fiber-reinforced plastic.

On presentation of spreading of a feather edge 4 was in the 4 to 9 waived. This spreading proceeds in the second embodiment in an analogous manner as for the first embodiment with respect to the 1 to 3 explained.

The 4 to 6 In synopsis it can be seen that the plateaus 15 from abutment 3 and implant body 2 come to rest in the assembled state.

In the 8th recognizable screw-in help 22 serves to receive a complementary shaped tool, by means of which the abutment 3 opposite the implant body 2 is determined. Here, the screw head 14 also complementary to the screwing help 22 be shaped.

Alternative to the internal thread 21 in the embodiment of the implant body 9 as well as to the plastic sleeve with internal thread 21 to 5 may be thought to provide a connection partner of a bayonet closure.

LIST OF REFERENCE NUMBERS

1

Dental Implant System

2

implant body

3

abutment

4

feather edge

5

fillet

6

Inner diameter

7

Outer diameter

8th

Threaded rod section

9

inner thread

10

screw

11

external thread

12

recess

13

Plastic sleeve

14

screw head

15

plateau

16

imaginary cross-sectional plane

17

arrow

18

Job

19

Circular section

20

Thought middle axis

21

inner thread

22

Screwing-in aid

65

H height

66

D diameter

Claims (12)

A two-part dental implant system (1) comprising an implant body (2) and an abutment (3), characterized in that the abutment (3) comprises a spring edge (4) which is adapted to engage in connection of implant body (2) and abutment (3) to spread. Two-part dental implant system (1) according to Claim 1 , characterized in that the implant body (2) comprises a complementary portion (5) which is configured substantially complementary at least to a portion of the spring edge (4) of the abutment (3). Two-part dental implant system (1) according to one of the preceding claims, characterized in that the spring edge (4) at a location (18a) has an inner diameter (6) which is smaller than an outer diameter (7) at a location (18b ) of the complementary portion (5) which is associated with the location (18a) of the spring edge (4) in the assembled state. Two-part dental implant system (1) according to at least one of the preceding claims, characterized in that the abutment (3) consists of a plastic. Two-part dental implant system (1) according to Claim 4 , characterized in that the abutment (3) consists of PEEK. Two-part dental implant system (1) according to at least one of the preceding claims, characterized in that the implant body (2) is assigned a threaded rod section (8), wherein the abutment (3) is associated with a complementary internal thread (9). Two-part dental implant system (1) according to at least one of Claims 1 to 5 , characterized in that the implant body (2) and the abutment (3) is assigned in each case a connection partner of a bayonet closure. Two-part dental implant system (1) according to one of Claims 6 or 7 , characterized in that the diameter of the implant body (2) measures less than or equal to 4 mm. Two-part dental implant system (1) according to at least one of Claims 1 to 5 , characterized in that the implant body (2) comprises an internal thread (21) for receiving an external thread (11) of a screw (10), wherein the abutment (3) comprises a recess (12) for receiving the screw (10). Two-part dental implant system (1) according to at least one of the preceding claims, characterized in that the implant body and the abutment (3) are each assigned a connection partner for producing a positive connection. Two-part dental implant system (1) according to one of Claims 9 or 10 characterized in that at least a portion of the recess (12) for receiving the screw (10) is configured to receive a complementarily shaped screwing tool. Two-part dental implant system (1) according to one of Claims 9 to 11 wherein the dental implant system (1) comprises the implant body (2), the abutment (3) and the screw (10), characterized in that the screw (10) is made of a plastic or ceramic material.

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