Patent Application
20200085544
The invention relates to the field of dental medical technology, specifically to the field of dental implant systems.
Known dental implant systems include an implant (also called “anchoring part”, or, if it is provided with an (outer) thread, a “screw”), which is anchored in the jawbone and can serve as artificial tooth roots. For this, the implant can include an (outer) thread on the outer surface of the enossal region, thus on the region that is envisaged to be sunk in the bone.
Dental implant systems can further include a construction part (also called “abutment”), which is provided for fastening on the implant. The superstructure (e.g., a crown, bridge or prosthesis) can be put onto the part of the implant or—if present—of the abutment (called “post” or “head” given the respective shape), which projects from the gums (gingiva). The implant, in particular an implant for connection to an abutment, can be designed such that it is incorporated roughly level with the bone surface (a so-called “bone-level” implant).
The implant can include a region that is configured to remain coronally of the bone surface. Such implants are so-called “tissue-level” implants and are configured to terminate roughly level with the soft tissue. Herein, the transmucosal region of the implant can be widened with respect to the enossal region (this shape is also called “tulip”). A further, special example of a “tissue-level” implant is a co-called monotype implant, which is configured to project beyond the mucosal region in the implanted state and to receive, e.g., a crown or an outer sleeve (e.g., for a bar restoration) in a direct manner, i.e., without the use of an abutment. In contrast to “bone-level” implants and classical “tissue-level” implants, monotype implants are 1-part implants, concerning which the implant and post or the implant and head are manufactured as one piece, i.e., the implant at the soft tissue boundary continues smoothly into the post or into the head.
Dental implants include counterparts that are placed onto the coronal end of the implant. A counterpart is hereinafter to be denoted as a “prosthetics component”. A prosthetics component can be designed as an abutment. A prosthetics component can be designed as a crown or as an outer sleeve (e.g., for a bar restoration).
The prosthetics component can be fastened in the implant by a positioning screw or an occlusal screw. The implant can include an opening on the coronally situated face side, the opening including an (inner) thread for receiving the screw. The prosthetics component can include structure features for receiving the screw, for example an opening.
A problem of conventional dental implant systems is the insufficient mechanical stability of the implants, in particular of those with a reduced diameter. Hairline cracks and fractures on the wall of the implant can therefore occur, such being able to arise under the influence of horizontal forces (thus, forces that act essentially perpendicularly to the implant axis) and of the torques that are produced by way of this. Micro-movements can lead to a loosening of the connection between the participating components and hence to damage, in particular to the implant in the course of the wearing time. Vertical forces, which can arise, for example, on fastening the prosthetics component or under functional loading on chewing, are also capable of compromising the mechanical stability of the implant. In particular, such problems in particular can be exacerbated if an extension of the prosthetics component that engages into the implant has the shape of a cone and can accordingly exert a wedging effect with a spreading action upon the implant wall.
A further problem of known dental implant systems is a possible loss of retention between the implant and the prosthetics component. Above all, this complication is extremely disadvantageous when the prosthetics component lies below a cemented restoration and access to the positioning screw is blocked due to this.
Another problem of known dental implant systems are gaps between the implant and prosthetics component. A reduction of such gaps is desirable from a biological as well as microbial point of view.
It is an object of the invention to provide an improved dental implant system. In particular, the provided dental implant systems can be suitable for improving the state of the art with regard to one and/or more of the aforementioned problems.
In an embodiment, the dental implant system includes an implant and a prosthetics component that are designed to assume one, two or more taper connections with one another, thus clamping connections on clamping surfaces with steep inclinations. On account of the friction between the clamping surfaces, such taper connections permit a stable connection between the implant and the prosthetics component. A known example of a taper connection is a Morse taper connection. Due to the steepness of the clamping surfaces, a taper connection also stabilises with regard to movements in directions that are different to the connection direction, in particular with regard to directions that are orthogonal thereto.
The implant can be configured for anchoring in the bone tissue. In particular, the implant can be designed for being rotated into the bone tissue and include an (external) thread.
The prosthetics component can be configured to be put onto the implant. In particular, the prosthetics component can be configured to be inserted and/or to engage into the implant. The prosthetics component can be designed as an abutment, crown or outer sleeve.
The dental implant system can include a fastening means that is suitable for fastening the prosthetics component on the implant. The fastening means can be designed as a screw, for example as a positioning screw or as an occlusal screw. The implant and/or the prosthetics component can be configured for receiving the fastening means. In particular, the implant can include an inner thread for receiving a fastening means that is designed as a screw. The prosthetics component can includes recesses, in particular exactly fitting recesses, for receiving the screw body and/or the screw head.
The clamping surfaces of taper connections are designed essentially as lateral surfaces of general cones, thus of general cylinders which taper in one direction. A general cylinder can have any cross-sectional shape, thus be designed as a circular cylinder, an elliptical cylinder or a prism. In particular, a clamping surface can be designed as a lateral surface of a rotationally symmetrical truncated cone.
For a taper connection, the clamping surfaces are preferably very steep, in particular the clamping surfaces can have a tapering of less than 10°, in particular less than 8°, in particular less than 6°, in particular less than 4°, in particular less than 3°, in particular less than 2° or in particular less than 1°. The clamping surfaces can have a tapering of more than 0.1°, in particular of more than 0.5°, in particular of more than 1°, in particular of more than 2°, in particular of more than 3°, in particular of more than 4° or in particular of more than 5°. The clamping surfaces can include structure elements and on account of this can differ from the shape of a lateral surface of a general cone. Such structure elements can be designed as an orientation aid, positioning aid and/or a twist (rotation) protection.
An implant-side clamping surface can be designed as a steep bevelling on the coronal end of the implant, in particular on a coronal end-face of the implant.
A clamping surface can have a smooth surface.
A clamping surface can have a non-osseointegrative surface.
A taper connection includes a male connection portion and a female connection portion.
A male connection portion includes a connection portion that tapers in the connection direction and which includes an outer surface that is designed as a clamping surface.
A female connection portion includes a connection portion that widens in the connection direction and that includes an inner surface that is designed as a clamping surface.
The clamping surface of the male connection portion and the clamping surface of the female connection portion can be designed as a pair of clamping surfaces that are adapted to one another in an exactly matching manner.
The female connection portion can exert inwardly directed forces upon the male connection portion and therefore increase the mechanical stability of the male connection portion and/or parts that are adjacent thereto.
At a taper connection, the connection portion of the prosthetics component can be designed male and the connection portion of the implant designed female, and in this case one speaks of the connection portion of the implant receiving or clamping in the connection portion of the prosthetics component. Alternatively, the connection portion of the implant can be designed male and the connection portion of the prosthetics component designed female, and in this case one speaks of the connection portion of the prosthetics component receiving or clamping in the connection portion of the implant.
The implant can include an implant recess, which is arranged in the coronal face side of the implant. For this, the prosthetics component can be configured to engage into the implant recess on being placed onto the implant. The implant recess can be configured for receiving the fastening means. In particular, the implant recess can include an (internal) thread. The implant recess can be designed at least partly as a female connection portion of a taper connection.
The edges of a section of the implant, which are situated distally seen from the implant axis, along the implant axis, in particular along the coronal end of the implant can be designed as clamping surfaces of a male connection portion of a taper connection. The prosthetics component can clamp in the implant “from the outside” at these edges of a section of the implant along the implant axis which are situated distally seen from the implant axis. At such a connection, forces can act upon the implant from the outside to the inside and therefore increase the mechanical stability. For example, the edges of a section of the implant can be designed essentially as a lateral surface of a general cone, in particular of a rotationally symmetrically truncated cone, which tapers in the coronal direction.
Forces that act from the outside to the inside can be suitable so as to counteract forces that act from the inside to the outside, as can be caused for example by way of internal connections.
In an embodiment, the implant and the prosthetics component can be configured to assume two taper connections with one another.
It can be the case that a first taper connection blocks before a second taper connection on fastening and/or that a first taper connection is subjected to a different force than a second taper connection in a fastened state. By way of this, the force action upon individual parts of the dental implant system, in particular upon individual parts of the implant, can be controllable, by which means for example the mechanical stability of individual parts of the implant can be influenced in a targeted manner.
In an embodiment, the implant and the prosthetics component can be configured to assume two taper connections with one another,
An example of such an embodiment is described in more detail hereinafter by way of
The implant and the prosthetics component can be configured to assume two taper connections with one another,
The (male) connection portion of the implant, which belongs to the second taper connection, can be arranged at the coronal end of the implant. The (male) connection portion of the implant for the first and/or second taper connection can be designed as clamping surfaces on edges of the coronal end of the implant, which are situated distally seen from the implant axis. The prosthetics component can be configured to clamp the implant in from the outside at the first and/or second taper connection. The connection portion of the second taper connection can be designed as a coronal region of the implant and/or as a polygonal head (also called “external connection”) on the face side of the implant.
In an embodiment, the implant and the prosthetics component can be configured to assume two taper connections with one another,
In particular, the implant-side clamping surface of the second taper connection can be arranged in an implant recess. Examples of such embodiments are hereinafter described in more detail, e.g., by way of
The implant and the prosthetics component can be configured to assume two taper connections with one another,
The first and the second taper connection can be arranged essentially or at least partly at the same axial height of the implant. The first and the second taper connection can both be arranged at the coronal end of the implant. The prosthetics component can be configured to clamp the implant in from the outside at the first taper connection. The (male) connection portion of the implant for the first taper connection can be designed as clamping surfaces on edges of the coronal end of the implant that are situated distally seen from the implant axis. The (female) connection portion of the implant for the second taper connection can be designed as clamping surfaces on edges of the coronal end of the implant that are situated proximally seen from the implant axis. The (female) connection portion of the implant for the second taper connection can be arranged on and/or in the implant recess. The first and the second taper connection can clamp in opposite directions, thus be configured such that the force actions of the first and of the second taper connection, which are projected onto a plane that is perpendicular to the implant axis, are essentially counter to one another; and the mechanical stability of regions of the implant that are clamped counter to one another can be increased by way of this.
The clamping surface of a connection portion of the prosthetics component can be essentially equally long in the connection direction as the clamping surface of a corresponding connection portion of the implant.
The clamping surface of a connection portion of the prosthetics component can be designed essentially shorter in the connection direction than the clamping surface of a corresponding connection portion of the implant.
The clamping surface of a connection portion of the prosthetics component can be designed essentially longer in the connection direction than the clamping surface of a corresponding connection portion of the implant.
The female connection portion of a taper connection, between the implant and the prosthetics component can be designed to essentially completely receive the corresponding male connection portion.
The female connection portion of a taper connection, between the implant and the prosthetics component can be designed to only partly receive the corresponding male connection portion.
A prosthetics component, which is designed as an abutment, can include a jacket, thus a region which can be put over the coronal implant region in the manner of a cap. The jacket can be designed for assisting in the veneering material. The prosthetics component, which is designed as an abutment, can be designed for receiving bonded or cemented crowns.
In an embodiment, the prosthetics component can be configured to clamp the implant in from the outside at its coronal end at a taper connection. Herein, the (female) connection portion of the prosthetics component can be configured to essentially completely receive the (male) connection portion of the implant. In particular, the clamping surface of the (female) connection portion of the prosthetics component can be designed essentially equally long in the connection direction as the clamping surface of the (male) connection portion of the implant. In this case, a prosthetics component, which is designed as an abutment, can extend further laterally subsequent to the clamping surfaces, in order to form a jacket, which in the manner of a cap, can be pushed over the implant region, which is apically subsequent to the taper connection.
A female connection portion and a male connection portion of a taper connection can be configured such that the female connection portion does not completely receive a corresponding male connection portion. In particular, the clamping surface of the female connection portion can be shorter in the connection direction than the clamping surface of the male connection portion. For example, the length of the clamping surface of the female connection portion in the connection direction can be at the most 75%, in particular at the most 50%, of the length of the clamping surface of the male connection portion in the connection direction.
In an embodiment, the implant can include two taper connection portions,
In this context, the term “outer” is to denote the edges of the coronal end of the implant that are situated distally seen from the implant axis; the term “inner” in this context is to denote the edges of the coronal end of the implant that are situated proximally seen from the implant axis.
A cross section of the implant, in particular a cross section through a plane that includes the implant axis can encompass the implant axis, the direction of the fastening force and/or the direction of a taper connection.
A cross section of the implant, in particular a cross section through a plane that includes the implant axis can include two elevations, wherein the side of the elevations which is situated distally of the implant axis is realised by the outer, male connection portion of the implant, and the side of the elevation that is situated proximally of the implant axis is realised by the inner, female connection portion of the implant.
In a cross section of the implant, in particular a cross section through a plane which includes the implant axis, an edge of the outer-lying male connection portion can be longer, shorter and/or essentially equally long as an edge of the inner-lying female connection portion of the implant.
In a cross section of the implant, in particular a cross section through a plane that includes the implant axis, an edge of the outer-lying male connection portion of the implant can be at least 0.5 mm long.
In a cross section of the implant, in particular a cross section through a plane that includes the implant axis, an edge of the outer-lying male connection portion of the implant can be 3 mm long at the most.
In a cross section of the implant, in particular a cross section through a plane that includes the implant axis, an edge of the inner-lying female connection portion of the implant can be at least 0.5 mm long.
In a cross section of the implant, in particular a cross section through a plane that includes the implant axis, an edge of the inner-lying female connection portion of the implant can be 3 mm long at the most.
In a cross section of the implant, in particular a cross section through a plane that includes the implant axis, the edge of the outer-lying male connection portion of the implant can be designed so as to lie at least partly within the bone, thus apically of the bone boundary, in the implanted state. In particular, the implant can be designed as a “bone-level” implant.
An outer-lying male connection portion of the implant and/or an inner-lying female connection portion of the implant can be designed as a steep bevelling on a face side of the implant.
The counterpart of a connection portion of the implant which is designed as an outer bevelling on the coronal end-face of the implant can be designed as a barrel-ring-shaped connection portion of the prosthetics component. Such a barrel-ring-like connection portion of the prosthetics component is hereinafter also to be called a stabilisation ring. In particular, a stabilisation ring can only have a narrow ring surface. For example, a stabilisation ring can be less than 1.5 mm, in particular less than 1 mm, in particular less than 0.5 mm wide. A stabilisation ring can be configured to counteract forces, which are exerted by an inner-lying male connection portion of the prosthetics component onto portions of the implant.
The transmucosal region of a “tissue-level” implant can be widened compared to the enossal region and form a so-called “tulip”. An outer-lying male connection portion of the implant and/or an inner-lying female connection portion of the implant can be designed as a steep bevelling on a coronal face side of the tulip.
A “tissue-level” implant, thus an implant that includes a region which is configured to remain coronally of the bone surface can include a male connection portion which is situated distally of the implant axis and is arranged at the coronal end. A connection portion of the implant can be spaced from the enossal part. The distance between the connection portion of the implant and the enossal part can be more than 1 mm, in particular more than 2 mm, in particular more than 3 mm. A connection portion can be spaced from the enossal part for example by a flat support shoulder. The flat support shoulder can be designed essentially as a circular cylinder.
In an embodiment, an outer-lying connection portion of the implant, which is designed male, can be arranged on a coronal face side of the implant. This connection portion can be designed as a bevelling on the face side. For example, the bevelling at the most can be 1 mm long, in particular 0.5 mm long. With regard to a “tissue-level” implant, this bevelling can be spaced from the enossal part. The distance to the enossal part of the implant can be more than 1 mm, in particular more than 2 mm, in particular more than 3 mm.
With regard to a “monotype” implant, the clamping surface of an outer connection portion, which is designed male, can be configured to run partly coronally and partly apically of the soft tissue boundary.
The implant and the prosthetics component can be designed such that a tolerance region is formed between the implant and the prosthetics component in the inserted but not fastened state. In particular, the implant and the prosthetics component can be configured such that two, in particular three, in particular four, in particular more than four tolerance regions are formed between the implant and the prosthetics component in the inserted, but non-fastened state.
Tolerance regions can be designed such that mating connection portions of a taper connection can be inserted further into one another on fastening. By way of this, the male connection portion can sink into the female connection portion on fastening. For example, the tolerance regions can be designed to permit a slight play in the direction of the respective associated connection, by which means a mechanical insertion of the corresponding connection portions further into one another under the influence of the fastening force is rendered possible. On account of the arising barrel-ring effect, the connection between the implant and the prosthetics component can be strengthened and/or the mechanical stability of the implant increased.
Gaps between the implant and the prosthetics component, in particular gaps between the clamping surfaces of a taper connection can be reduced in size, in particular minimised, by way of the combination of taper connections and tolerance regions. By way of this, a precise marginal seal, a precise fit between the implant and the prosthetics component can be achieved, which entails advantages from a mechanical, biological and/or microbial point of view.
The participating portions can sink further into one another on fastening and an additional friction fit between the clamping surfaces of the respective portions can arise due to the combination of taper connections and tolerance regions. By way of this, one succeeds in the force that is necessary for detachment being able to be greater than the force which is required or mustered for the fastening.
A tolerance region can be designed as a distance in the direction of the fastening force.
A tolerance region can be designed as a distance in the direction of the taper connections, thus essentially in the direction of the steep inclinations.
A tolerance region can be designed as a distance in the apical-coronal direction.
A tolerance region can be arranged, for example, at a coronal or apical end of a taper connection.
A tolerance region can be arranged between a plane surface of the implant and a plane surface of the prosthetics component.
A tolerance region in a cross section, in particular in a cross section through a plane that includes the implant axis can essentially be designed as a trapezium. In particular, it can be the case,
In a cross section, it can be that one or both non-parallel sides of the trapezium can be designed as a continuation of an oblique side, which in the cross section represents a clamping surface.
A distance between the implant and the prosthetics component can be formed, for example, in the direction of the fastening force and/or in the direction of the taper connections and/or in the apical-coronal direction.
In an inserted state, a distance between the implant and the prosthetics component in a tolerance region can be at least 50 μm. In particular, in an inserted state, a distance in a tolerance region can be at least 100 μm, in particular at least 150 μm, in particular at least 200 μm.
The implant and the prosthetics component can be configured, in a tolerance region, to have a distance that, in the fastened state, is reduced by at least 25% compared to a non-fastened state. In particular, a tolerance region in a fastened state can have a distance that is reduced by at least 50%, in particular by at least 75%.
The implant and the prosthetics component can be configured such that in a tolerance region, they have a distance of at the most 50 μm in a fastened state. In particular, a distance in a tolerance region can be at the most 100 μm in a fastened state.
The implant and the prosthetics component can be configured such that in a fastened state, in a tolerance region they have a distance of at least 20 μm. In particular, a distance in a tolerance region can be at least 30 μm in a fastened state.
Each taper connection can include at least one associated tolerance region. A taper connection can include at least two associated tolerance regions. Each taper connection can include at least two associated tolerance regions.
A tolerance region can include at least two associated taper connections. Each tolerance region can include at least two corresponding taper connections.
A tolerance region can be directly or indirectly adjacent to an associated taper connection. A tolerance region can be arranged coronally of an associated taper connection. A tolerance region can be arranged apically of an associated taper connection. A tolerance region can be arranged laterally of an associated taper connection.
An extension portion can be subsequent to a connection portion of a taper connection in the connection direction or a direction that is opposite to this. An extension portion can be designed, for example, as a non-tapering general cylinder. A tolerance region that belongs to the connection can be arranged at an end of an extension portion. In such a case, the tolerance region permits the remotely lying taper connection portions to be pushed further into one another, wherein the extension portion is co-pushed. An extension portion can be arranged coronally and/or apically of a connection portion of an implant or of a prosthetics component.
In an embodiment, the dental system can be configured such that small lateral gaps are formed between the implant and the prosthetics component in the inserted state. These lateral gaps can be configured such that the prosthetics component can be pushed into the implant without a large friction resistance. The lateral gaps can have a width, e.g., of 50 μm at the most. In particular, the lateral gaps can have a width of 40 μm at the most, in particular 30 μm at the most. The lateral gaps can be dimensioned such that the user does not have the feeling that the prosthetics component wobbles in the implant in the inserted state. In particular, the lateral gaps can be dimensioned such that a fastening means can be inserted without changing the position of the prosthetics component in the implant.
In an embodiment, the fastening means can be designed as a screw. In this case, the implant and/or the prosthetics component can include a screw thread for receiving the screw. Furthermore, the prosthetics component can include a slide hole for introducing the screw.
In an embodiment, a fastening means, which is designed as a screw, and the prosthetics component can be designed to assume a taper connection with one another. For example, the screw can include the male connection portion and the prosthetics component the female connection portion of such a connection. In particular, the apical end of the head of the screw can be designed as a connection portion with a clamping surface; for example, the apical end of the head of the screw can be designed as a truncated cone, in particular as a truncated cone that tapers in the apical direction.
The dental implant system can include an orientation aid, a positioning aid and/or a twist (rotation) protection. An orientation aid, a positioning aid and/or a twist (rotation) protection can be designed as structure elements in the implant and/or in the prosthetics component. Such structure elements can also be used for a dental implant system without a taper connection.
Structure elements of the implant and of the prosthetics component can be matched to one another for example in pairs, so that mating structure elements engage in one another when the prosthetics component is placed onto the implant and/or fastened. Structure elements of the implant and of the prosthetics component can be designed matching one another in a precise manner, in particular with a positive fit.
Structure elements can be designed to simplify the orientation of the prosthetics component on insertion into the implant.
Structure elements can be designed to permit the insertion of the prosthetics component into the implant in only one position, or only in a small number of positions, for example two, three, four or six positions.
Structure elements can be designed to hinder, in particular to prevent, a rotation, in particular a rotation that is transmitted on fastening, of the prosthetics component with respect to the implant.
Structure elements can be designed as grooves and/or notches, in particular as grooves and/or notches that run axially from the implant axis. For example, the implant can include grooves and the prosthetics component can include notches that are matched thereto. For example, the implant can include notches and the prosthetic component grooves that are matched thereto. For example, the implant as well as the prosthetics component can include notches and projections that are matched thereto. The dental implant system can include, e.g., precisely or at least one, two, four, six or eight notches and/or projections.
Structure elements of the implant can be arranged in an implant recess. Structure elements of the implant can be arranged symmetrically, in particular rotationally-symmetrically to the implant axis.
Structure elements can be arranged on and/or in clamping surfaces of a taper connection. Structure elements can be arranged in the clamping surfaces and, in particular, can be designed such that the respective clamping surface differs from the shape of a lateral surface of a general cone, but despite this is suitable as a connection portion for a taper connection. The arrangement of structure elements in a clamping surface can assist in the design of shorter implants.
Structure elements can be arranged apically and/or coronally of a clamping surface. For example, structure elements can be arranged in an extension portion that is apically or coronally subsequent to a clamping surface. If the implant includes structure elements that are arranged apically (or coronally) of the clamping surfaces, then the prosthetics component can include corresponding structure elements that are arranged apically (or coronally) of the clamping surfaces.
Structure elements can be configured not to inhibit the insertion into one another, in particular a further insertion into one another, of connection portions of a taper connection.
Structure elements can be formed in the connection direction and in particular extend in the connection direction. In particular, a structure element in a cross section through a plane, in particular through a plane that encompasses the implant axis can include edges in the direction of the implant axis, in the direction of the fastening force and/or in the direction of a taper connection.
A structure element can have an essentially box-shaped geometry. A structure element in a clamping surface of a taper connection can be designed locally, e.g., as a section of a cuboid with a general cone. In particular, a side of the cuboid can be orientated in the direction of the implant axis, in the direction of the fastening force and/or in the direction of a taper connection.
An essentially box-shaped structure element can taper in one, two or more directions, in particular in the apical or coronal direction, in the connection direction or in a direction that is opposite thereto. Such a tapering of a structure element can be configured as a connection portion of a taper connection of the dental implant system.
A structure element can include an essentially box-shaped portion. A structure element can include a tapering, essentially box-shaped portion.
In an embodiment, a dental implant system can include:
The implant and the prosthetics component can be configured to assume a first taper connection and a second taper connection with one another, wherein the implant includes the male connection portion of the first taper connection. The dental implant system can be configured such that:
In an embodiment:
In an embodiment, the implant-side connection portion of the second taper connection can be designed as a female connection portion. In particular, the implant-side connection portion of the second taper connection can be designed as part of an implant recess.
In an embodiment, the implant-side connection portion of the second taper connection can be designed as a male connection portion. In particular, the implant-side connection portion of the first taper connection can be arranged at the coronal end of the implant, and the implant-side connection portion of the second taper connection can be arranged on a surface of the implant, which is distal to the implant axis. In particular, the implant-side connection portion of the second taper connection can be arranged apically of the implant-side connection portion of the first taper connection.
In an embodiment, the angle of the clamping surfaces of the first taper connection and/or of the second taper connection to the implant axis can be 8° or less than 8°.
In an embodiment, the length of the projection of a clamping surface of the implant onto the implant axis is 1 mm at the most.
In an embodiment, a tolerance region in the non-fastened state can be designed as a distance between the implant and the prosthetics component in the coronal-apical direction. In particular, the distance between the implant and the prosthetics component in the coronal apical direction in the non-fastened state can be at least 100 μm.
In an embodiment, the fastening means can include a thread. In particular, the fastening means can be designed as a screw.
In an embodiment, the implant and/or the prosthetics component can include structure elements that are designed as an orientation aid, a positioning aid and/or a twist (rotation) protection.
In an embodiment, the structure elements can be designed as projections and corresponding notches. In particular, the projections and notches can be designed at least essentially box-shaped. The grooves and notches can taper in the coronal and/or apical direction.
In an embodiment, one or more structure elements can be arranged in the connection portions.
In an embodiment, one or more structure elements can be arranged apically of the connection portions.
In an embodiment, the prosthetics component can be designed as an abutment, crown or outer sleeve.
A method for fastening a dental implant system of a previously described dental implant system can include the following method steps:
The subject-matter of the invention is explained hereinafter in more detail by way of preferred embodiment examples which are represented in the accompanying drawings. There are shown schematically in (and not necessarily true to scale):
The implant 10, which is represented in
The shown implant 10 is configured to assume a first taper connection and a second taper connection, with a prosthetics component 20. A taper connection is a clamping connection on clamping surfaces 45 with steep tapers. A known example of a taper connection is the so-called Morse taper connection. The clamping surfaces 45 can be designed, for example, essentially as lateral surfaces of general cones, thus, for example, general cylinders that taper in one direction. For example, the clamping surfaces 45 can be designed essentially as rotationally symmetrical truncated cones. A symmetrical shape of a clamping surface 45 can be interrupted for example by way of structure elements (not shown) such as notches (not shown) and projections (not shown), the elements being able to function as an orientation aid, positioning aid and/or twist (rotation) protection and are described in more detail hereinafter.
In the represented example, the implant 10 includes a connection portion 41 for a first taper connection and a connection portion 51 for a second taper connection, thus in total two steep clamping surfaces 45. In the shown example, the two clamping surfaces 45 are arranged at the coronal end 14 of the implant 10. The angle of a clamping surface 45 to the implant axis 19 can be for example 8° or less.
In the shown example, the clamping surface 45 of the implant-side connection portion 41 of the first taper connection is arranged on the implant 10 at the outside, thus on an edge of the implant 10, which is situated distally seen from the implant axis 19. In the shown cross section, this clamping surface 45 is represented as a bevelling of the coronal end 14 of the implant 10 at the upper left as well as upper right edge of
In the shown example, the clamping surface 45 of the implant-side (belonging to the implant) connection portion 41 of the first taper connection is designed as a male connection portion. A male connection portion is configured to be received by a female connection portion. A male connection portion tapers in the connection direction; whereas a female connection portion widens in the connection direction. The female connection portion can exert inwardly directed forces onto the male connection portion, and therefore increase the mechanical stability of the male connection portion and/or of the parts which are adjacent thereto.
In the shown example, the clamping surface 45 of the implant-side connection portion 51 of the second taper connection is arranged on the implant 10 at the inside. Expressed more precisely, this clamping surface 45 is arranged in the implant recess 16 and forms its coronal end. In the shown cross section, this clamping surface 45 is represented as bevellings at the coronal end of the implant recess 16. This clamping surface 45 can also be designed, for example, as a surface of a truncated cone, out of which optionally notches (not recognisable in the shown cross section) can be recessed and/or onto which the projections (not recognisable in the shown cross section) can be placed.
In the shown example, the clamping surface 45 of the implant-side connection portions 51 of the second taper connection 50 are designed as a female connection portion, thus widens in the connection direction.
The abutment 20 includes a connection portion 42 for the first taper connection as well as a connection portion 52 for the second taper connection. A connection portion 42, 52 of the abutment can be designed in a manner corresponding to a corresponding connection portion 41, 51 of the implant 10, for example shaped at least partly as its negative.
In the shown example, the abutment-side (belonging to the abutment) connection portion 42 of the first taper connection 40, which is situated at the outside, is designed as a female connection portion and is configured to receive the implant-side connection portion 41, which is designed male. In contrast to this, the abutment-side connection portion 52 of the inner-lying second taper connection 50 is designed as a male connection portion and is received by the implant-side connection portion 51 which is designed female.
In the shown placed-on state, two tolerance distances 60 are formed between the implant 10 and the abutment 20.
One of the shown tolerance distances 60 is arranged at the coronal end 14 of the implant 10. In the cross section of
A further represented tolerance distance 60 is arranged at the apical end of the abutment 20.
The tolerance regions 60 which, similarly to the example of
By way of the combination of taper connections 40, 50 and tolerance regions 60, gaps between the implant 10 and the prosthetics component 20, in particular gaps between the clamping surfaces 45 of a taper connection 40, 50 can be reduced in size, in particular minimised. By way of this, a precise marginal seal between the implant 10 and the prosthetics component 20 and/or or a precise fit between the implant 10 and the prosthetics component 20 can be achieved.
The fastening means 30, which are designed as a screw in this example, and the prosthetics component 20—as is shown in this example—can be configured to assume a taper connection with one another. In the shown example, the prosthetics component 20 includes the female connection portion and the screw 30 the male connection portion of this connection. As is shown in this example, the apical end of the head of the screw can be designed as the male connection portion of the connection, which can be designed for example as a truncated cone which tapers in the apical direction.
Furthermore, a crown 80, which can be placed over the abutment and which serves as a denture, is shown in
The implant 10, which is shown in
A first taper connection 40 is arranged on the implant 10 at the outside; the implant-side connection portion 41 of this first taper connection 40 is designed male. A second taper connection 50 is arranged in the implant recess 16; the implant-side connection portion 51 of this second taper connection 50 is female and is designed as a coronal end of the implant recess 16.
The implant 10 that is show in
A first taper connection 40 is arranged on the implant 10 at the outside; the implant-side connection portion 41 of this first taper connection 40 is designed male. The clamping surfaces 45 of this first taper connection—as is shown in
The implant 10 that is shown in
A first taper connection 40 is arranged on the implant 10 at the outside; the implant-side connection portion of this first taper-connection 40 is designed male. The clamping surfaces 45 of this first taper connection 40—as is represented in
A second taper connection 50 is arranged in the implant recess 16; the implant-side connection portion 51 of this second taper connection 50 is female and is designed as the coronal end of the implant recess 16. As is shown in the shown example, the clamping surface 45 of a female second taper connection 50, which is arranged in a coronal end of the implant recess 16, can be designed longer in the connection direction than the clamping surface 45 of a male first taper connection 40, which is arranged at the outside.
The implant 10 that is shown in
The implant 10 that is shown in
A dental implant system can include two taper connections 40, 50, whose implant-side connection portions 41, 51 are both designed male. An example of this is shown in
In the shown example, yet a third taper connection (not shown), which at the implant side (concerning the implant) could be designed, e.g., female could be arranged within the implant recess 16. Generally, two or more, in particular three or more, in particular four or more taper connections can be arranged between the implant 10 and the prosthetics component 20.
A dental implant system can include two taper connections 40, 50, of which one is arranged coronally of the other.
The implant 10 that is shown in
In the shown example, the implant-side clamping surface 45 of the outer, first taper connection 40 is designed as a truncated cone. The clamping surface 45 of the second taper connection 50 is arranged in an implant recess 16 and is designed as a truncated cone with structure elements 70.
Structure elements 70 are geometric particularities that can function as an orientation aid, positioning aid and/or twist (rotation) protection for placing and/or fastening the prosthetics component on/onto the implant 10.
In an embodiment, an implant 10 can include structure elements 70 and a prosthetics component can include structure elements 70 that match with these. For example, the implant 10 can include notches 71 and the prosthetics component 20 can include projections (not shown) that match with these. Of course the notches and projections can also be arranged the outer way round or mixed. A structure element 70 of the implant 10 and a structure element 70 of the prosthetics component 20 can be adapted to one another, in particular designed at least partly as a negative shape of the other.
In the shown example, structure elements 70 are formed by recesses, thus notches 71, in the clamping surface 45 of the implant-side connection portion 51 of the second taper connection. As a whole, four such structure elements 70 are represented in the shown cross section and these—as shown in the example—can be arranged rotationally symmetrically and offset to one another by 90°.
Structure elements 70 can, for example, include a box-like geometry, thus be designed locally as a section of a cuboid, which possibly tapers in one or more directions and which is with a steep clamping surface 45 and/or other parts of the implant 10 or of the prosthetics component 20. The structure elements 70, which are shown in
Structure elements 70 can be arranged at least partly in a clamping surface 45 of a taper connection, but also coronally and/or apically of a clamping surface 45 and even arranged distanced to a clamping surface.
A tapering of a structure element 70 can be, e.g., 8° or less than 8° (relative to the implant axis 19) and for its part can again function as a clamping surface 45, by which means the total surface of the clamping surfaces between the implant 10 and the prosthetics component 20 can be enlarged.
Concerning box-like structure elements 70, such as, e.g., those which are shown in
The clamping surface 45 of the inner, female connection portion 51 of the implant includes a structure element 70, which is designed as a notch 71 and which is formed at the apical end of the clamping surface 45. The corresponding male connection portion 52 of the prosthetics component 20 includes a structure element, which is arranged and designed in a manner corresponding to this, in the form of a projection 72. The projection 72 is designed essentially as a negative of the notch 71 and is configured to commonly assume a positive fit together with the notch 71. In the shown example, the two shown structure elements 70 are each designed as a step.
The show example includes two tolerance regions between the implant 10 and the prosthetics component 20. A first tolerance region is arranged coronally of the coronal end 14 of the implant 10 and is adjacent to the two shown taper connections 40, 50. A second tolerance region is arranged at the apical end of the second, inner connection 50, at the apical end of the two shown structure elements 70. On fastening, the prosthetics component 20 can be pushed further into the implant 10 due to the two shown tolerance regions 60 and in particular the respective gap at the respective connections 40, 50 can therefore be reduced, in particular minimised.
| Number | Date | Country | Kind |
|---|---|---|---|
| 00687/17 | May 2017 | CH | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2018/063718 | 5/24/2018 | WO | 00 |
