WO2016142066A1

WO2016142066A1 - Modelling system for implant-supported tooth replacement element and use thereof

Info

Publication number: WO2016142066A1
Application number: PCT/EP2016/000427
Authority: WO
Inventors: Philippe Kern; Isabell WIESTLER; Andreas Van Ophuysen
Original assignee: Straumann Holding Ag
Priority date: 2015-03-10
Filing date: 2016-03-10
Publication date: 2016-09-15
Also published as: DE102015002948A1; DE212016000062U1

Abstract

A system for modelling an implant-supported tooth replacement element, characterized in that it contains as components an abutment element (1) and a cap element (6) that can be burnt out, wherein the abutment element (1), on the side facing the implant, has an implant interface (2), above this in the axial direction a transition area with a collar element (4) extending about the entire circumference of the abutment element (1), and above this collar element (4) an upwardly narrowing cone-like portion (3) which is provided at least partially on the outside with a thread (5), and the cap element (6) has a circular cylindrical portion (10) and, axially adjoining the latter, a portion (7) matching the cone-like portion (3) of the abutment element (1), said portion (7) having an inwardly directed inner thread (8) which can be brought into engagement with the thread (5) of the abutment element (1), such that this inwardly directed thread (8) permits an orientation parallel to the conical outer face of the upper portion (3) of the abutment element (1), and use of the system and method for said modelling. (cf. Fig. 1a, Fig. 2a).

Description

Modeling system for implant-supported denture element and its use

The invention relates to a system for modeling an implant-supported tooth replacement element (dental prosthesis) and its use.

Are known multifunctional adapter (hereinafter referred to as a cap member) for a pillar element for the production of implant-supported dental prostheses (dentures), which consist of a scannable material and are burned out (EP 2351536 AI). These already allow the preparation of excellent dentures, but there is still a need to optimize the connection between the cap member and the pillar member to allow for more flexibility in the fine-tuning and / or easier manipulation in denture modeling.

Against this background, the invention relates to an aforementioned system for modeling an implant-supported dental prosthesis element (dental prosthesis), characterized in that it includes a pillar element (abutment) and a burnable cap element (coping) as components, as well as the individual components as separate subject matter of the invention. The pillar element has an implant interface on the side facing the implant (base), a transition area in the axial direction with a collar element (in a plane perpendicular to the axis of the pillar element) around the entire circumference of the pillar element and above (in the upper part) upward tapering cone-like

CONFIRMATION COPY Section which is at least partially provided on the outside with an (outward) thread. The cap member has a circular cylindrical portion and, axially thereafter, a portion complementary to the conical portion of the pillar member having an inwardly directed internal thread engageable with the thread of the pillar member, such that the inwardly directed thread aligns and parallel to the conical outer surface of the upper portion of the pillar member, wherein the inwardly directed threaded portion preferably has 2 or more, especially 2 to 7, eg 2 to 4 threads, and preferably raised inwardly (inwardly of the said face) from the surrounding surface ) is configured.

An implant-supported dental prosthesis element can be, for example, a single tooth restoration such as a crown or its precursor or a multi-tooth restoration such as a bridge or its precursor. In the context of the invention, multi-tooth restorations on at least two implants are preferred.

The implant interface of the pillar element can be an interface which is customary with dental implants for connection; Use of implant and pillar element. This can be, for example, a cone tapering into the implant or also a polygon which is complementary to a polygon of the implant, the inside or the outside of the base of the pillar element being designed as a polygon at least in one section. The implant interface may also be a combination of several geometries, such as cone and polygon. Examples of implant interfaces are described in EP 2119414. A preferred implant interface, especially in a multi-tooth restoration, is a cone tapering into the implant.

Preferably, both the pillar element and the cap member are rotationally symmetrical formed on the mutually engageable thread sides or they are in particular formed completely rotationally symmetrical and so very easy to produce and handle. The invention also relates to the use of the inventive system or a method for modeling a dental prosthesis element, which is characterized in that a pillar element according to the invention with a cap member according to the invention acted such that the threaded portions with each other in the first place by turning into engagement can come. As a result, a gapless support of the cap element is achieved on the pillar element. Then, the tooth replacement element is modeled on the outside of the cap element by customary methods and methods (for example, waxing and blocking). Preferably, the cap member is rotated at least at the end of the loading operation to prevent rotational or vertical movement. This leads to a complete circulation. Usually, for modeling purposes, the pillar element is inserted into an implant analog in a model obtained, for example, by molding the patient's dentition.

For further reworking and checking, it may be necessary to remove the product thus obtained (cap elements blocked and / or with wax) and put back on the pillar element or elements. The cap and pillar elements according to the invention have here the effect brought about by the thread or threads Locking mechanism (clipping or snap-on), which allows a clear and precise repositioning and repositioning of the cap member relative to the pillar element (and vice versa). When this process element is to be used: is known to the person skilled in the art.

After the modeling, the resulting structure can then be converted into the corresponding metal part by embedding it in a suitable mass (eg sand with binder) and pouring metal, thereby burning out the burnable cap element (s) (preferably after milling out the threaded section originating from the original cap element) ) is fixed with the pillar element, for example, using a conventional cement, wherein the pillar element or, for example, in a bridge, the pillar elements is connected to one implant, for example under screw by means of a screw. In order to obtain a certain flexibility (especially in the case of modeling dental prosthesis elements for bridges) for correcting the position, the threaded portion of the cap element is advantageously raised inwards (protruding) with respect to the inside and outside of the cap element, so that the cap element preferably has a certain deformability, even after the connection with the pillar element still a little can be moved relative to this such that its upper end relative to the longitudinal axis of the pillar element is pivotable to some extent, that is, cap member and pillar element engage only in the threaded portion one another , The corresponding methods are known in principle to the person skilled in the art. Advantageously, in particular in dental prosthesis elements in the form of bridges, where the fastening takes place in at least two places, a snapping (clipping or snapping) of the pillar element / the pillar elements with the cap member / the cap elements are achieved in the threaded portion, which has a given: restriction or Impossibility of twisting compensated by the snap.

Preferably, the lower edge portion of the cap member is formed such that it comes to rest on positioning the cap on the pillar member so that it comes close to or, preferably, in contact with the upper part of the collar element of the pillar element, but without this collar element to complete envelop or include.

In the case of bridges over multiple implants, the cap elements are connected by bridging sections, such as wax, during modeling. The above and subsequent definitions make it possible to replace more general terms individually, in several or all of embodiments of the invention, and thus to define preferred embodiments of the invention. The number of threads indicates the number of turns of the thread (arranged in a spiral). Two threads mean, for example, that the spiral-shaped protruding portion forming the thread and / or the recessed portion forming the thread twice around the respective element (s) at a distance about its respective axis.

The protruding and / or the thread forming the thread or the withdrawn portions may be interrupted continuously or continuously (without interruption in the course of or in the respective element) in a manner which does not affect the thread function as such (ie twistability remains ensured), eg they may be individually or both after each half, third, quarter, fifth or sixth turn around the axis of the respective pillar or cap element is interrupted. The thread on the pillar element usually has a thread depth greater than 8 microns, preferably between 8 and 50 microns, more preferably between 8 and 20 microns, and most preferably between 8 and 15 microns. The thread in the cap member is preferably complementary thereto. It is also possible a multi-thread, with a catchy is preferred. , ...

The thread covers the conical top of the pillar member at least in the area where the ^" cap member has the inwardly directed thread, but preferably at least 50% of the top, more preferably at least 80% of the top, and most preferably the entire top.

The thread inside the cap member is usually spaced 10 to 200 microns from the inner wall of the cone, and preferably 80 to 120 microns.

The burn-out cap member is preferably made of a material completely and residue-free decomposing upon heating during metal casting, such as e.g.

Polymethylmethacrylate (PMMA), such as Polycon ™ (Straumann CADCAM GmbH, Germany), or in particular polyoxymethylene (POM), PEEK (polyetheretherketone) or acetal. This allows that the space occupied by the cap element in the casting sand can be completely replaced by the metal to be cast, thus obtaining a piece of metal corresponding to the wax model together with the cap element.

The cap member may also have at its lower end an outward projection which may be brought into contact with the top of the collar member of the pillar member.

The portions of the pillar member that can not come into contact with the thread of the cap member may also be concave as viewed from the side of the pillar, which is "substantially cone-shaped." Preferably, only the area below the collar member is concave configured, the rest each cone-shaped without changing the angle to the longitudinal axis.

1 a) and in side view (FIG. 1 b) and as a longitudinal section (FIG. 1 c) and in the two end views (FIGS. 1 a and 1 b) show a pillar element according to the invention in perspective le).

2a to 2d show a cap element according to the invention in perspective (FIG. 2 a), in a longitudinal section (FIG. 2 b) and in a transverse section (FIG. 2 c). Fig. 2 d) shows a section of the thread (marked X position of Fig. 2 b)).

Fig. 3 shows further possible embodiments of a pillar element according to the invention in longitudinal section.

Further embodiments of the invention can be found in the claims, which are incorporated herein by reference, in particular in the subclaims.

The following examples illustrate, but are not limited to, the invention, and also describe preferred embodiments of the invention.

1 shows a pillar element 1 according to the invention with a lower section 2 (implant interface) and an upper section 3, each of which tapers conically in the opposite direction, and a collar element 4. The upper section 3 has a (spiral) on its outer side. Thread 5 on.

Fig. 2 shows a corresponding cap member 6 having an inner conically shaped portion 7 having on the inside an inwardly raised threaded portion 8, which can be associated with the thread 5 of the pillar element 1 in connection and in use position in modeling there is also positioned. The grandeur of the threaded portion 8 gives the cap member a certain degree of freedom both in modeling and in the shape of the metal casting and, for example, allows the cap member 6 to be slightly aligned (eg in the case of bridges), so that the (in FIG Line shown) axis of the cap member 6 and the axis Y of the pillar element 1 are no longer in alignment, which may allow a fine adjustment of the spatial arrangement, if necessary, which may be particularly useful in the case of bridges with two or more of the pillar element / cap element combinations , Also arises between pillar element 1 and cap member 6, a gap region (not shown), which may be useful for receiving cement in the later cementing of A collar region 9 can be provided, which can rest in the connecting position on the collar element 4 of the corresponding pillar element 1 of FIG. 1. This collar region may preferably be configured in the form shown in phantom (in the example shown continuous or interrupted around the collar region) with a short section extending at the lower edge below the thread 8 and arranged above it, parallel to the surface perpendicular to the axis of the cap member located above flat section. The threaded portion with the thread 8 of the cap member 6 may also be located higher in the conically shaped portion 7 or lower, as long as it can be brought into the thread of the pillar element in engagement. Preferably, the threaded portion 8 is located approximately in the center of the conically shaped portion. 7

In the embodiment shown here, the cap element 6 also has a substantially (tubular) cylindrical section 10 which, however, is optional and, for example, can be trimmed or otherwise reduced in size when modeling a dental prosthesis element.

3 shows another possible variant of a pillar element 1 according to the invention, here by way of example without the lower section and with an exemplary specially shaped implant interface (inter alia short section 11) and in particular a (preferably outwardly-downwardly) beveled, unthreaded lower part (13). of the upper portion 3 on the collar element 4. On the collar element 4 is preferably located above a region 11, which serves as a stop when Attaching a cap member can serve.

Claims

claims

1. System for modeling an implant-supported dental prosthesis element, characterized in that it comprises as components a pillar element (1) and a burn-out

Cap member (6), wherein the pillar element: (1) on the implant side facing an implant interface (2), in the axial direction above a transition region with a collar around the entire circumference of the pillar element (1) collar element (4) and above has upwardly tapered cone-like portion (3) which is provided on the outside at least partially with a thread (5), and the cap member (6) has a circular cylindrical portion (10) and axially thereafter one to the cone-like portion (3) of

Post member (1) complementary portion (7) with an inwardly directed internal thread (8) which is engageable with the thread (5) of the pillar element (1), so that this inwardly directed thread (8) aligning and parallel to the conical outer surface of the upper portion (3) of the pillar element (1) allows, has. ^'

2. System according to claim 1, wherein the thread (8) of the cap member (6) 2 or more, in particular 2 to 7, e.g. 2 to 4 threads.

3. System according to claim 1 or 2, wherein the thread (8) of the cap member (6) is designed to be inwardly raised with respect to the surrounding surface.

System according to one of claims 1 to 3, wherein both the pillar element (1) and the cap member (6) on the can be brought into engagement with each other thread-rotationally symmetrical or formed completely rotationally symmetrical.

5. System according to one of claims 1 to 4 in the form of a set, comprising two or more of said pillar elements (1) and / or two or more of said cap elements (6).

6. System according to claim 5 for modeling a multi-tooth supply.

A cap member (6) as described in any of claims 1 to 4.

8. pillar element (1) as such as described in one of claims 1 or 4.

9. A method for modeling one or more dental prosthesis elements, which comprises applying a pillar element (1) according to claim 8 with a cap element (6) according to claim 7 such that the with a thread (5) or threaded portion (8) provided Sections can engage each other.

10. The method of claim 9, wherein the engaging is performed by turning and / or clipping.

11. The method of claim 10 for modeling a multi-tooth supply, wherein after a first modeling step, the interconnected at least two cap elements (6) are removed from the pillar elements (1) and then back to the Pillar elements are positioned by clips.

A method according to any one of claims 9, 10 to 11, wherein on the outside of each cap member (6) is modeled by conventional methods and procedures a dental prosthesis element: wherein the pillar element is inserted into an implant analog in a model of a patient dentition, and then optionally after modeling, the resulting structure is converted into a corresponding dental prosthesis element by embedding it in a suitable mass and pouring it out with metal by burning out the burnable cap element or elements (6).

3. Use of a system according to one of claims 1 to 6 for modeling one or more dental prosthesis elements.