WO2015107083A1

WO2015107083A1 - Transfer template

Info

Publication number: WO2015107083A1
Application number: PCT/EP2015/050598
Authority: WO
Inventors: Dirk Jahn
Original assignee: Nt-Trading Gmbh & Co.Kg
Priority date: 2014-01-14
Filing date: 2015-01-14
Publication date: 2015-07-23
Also published as: DE102015100509A1; DE102015100509B4

Abstract

The invention relates to a position registering device for dental implants in a patient's mouth, comprising a support unit (12) that has a first portion (14) to be introduced into the patient's mouth and a second portion (16) for handling purposes, and at least one position registering unit (30) that comprises a dental implant screw (42), an elongate transfer pin (32) that includes a through-hole (40) for accommodating the dental implant screw, and a securing element (50, 54). The transfer pin (36) has a stop element (38) and, at a longitudinal end, an interface (34) for a dental implant. The securing element (50, 54) and the stop element (38) are designed in such a way that the transfer pin (36) can be secured to the support unit (12) in more than one angular position.

Description

Transfer Template

The present invention relates to a position-receiving device for dental implants in a patient's mouth.

In the manufacture of dentures usually a model of the mandible to be supplied and / or maxilla of the patient is made. In this model, for example, so-called. Dental implant analogs are used to simulate the implanted in the jaw bone dental implants of the patient. For a well-fitting denture, it is of great importance that the dental implant analogues exactly match the situation in the patient's mouth, in particular in terms of their angular orientation and their alignment with other dental implant analogs. To verify this, position sensing devices are used which can detect the orientation of the dental implants in the patient's mouth and allow comparison with the model.

When using such position sensing devices, easy handling is of great importance. Therefore, the object of the present invention is to provide a position-receiving device that is easy to handle for the dentist, especially under the cramped conditions in a patient's mouth.

The object of the invention is achieved by a position-receiving device for dental implants with a carrier unit having a first section for insertion into the patient's mouth and a second section for handling, and at least one position-receiving unit comprising a dental implant screw, an elongate transfer post with a shaft an interface and a bore for receiving the dental implant screw, and a fixing element, wherein the shaft has a stop element and the interface for connection to a dental implant is formed, and wherein the fixing element and the stop element are formed such that a fixation of the Transfer post on the carrier unit in more than one angular position is possible.

With the help of this position recording device, it is easily possible for the dentist to record the position of the introduced in the jawbone dental implants. For this purpose, the transfer posts are fixed in the dental implants using the dental implant screw, then the carrier unit is attached to the transfer post via fixing elements. Finally, the dentist can loosen the dental implant screws again to remove the carrier unit together with the transfer posts from the patient's mouth. This image of the dental implant situation in the patient's mouth can now be easily compared with the model.

In a preferred embodiment, the shaft (36) and the interface (34) are arranged coaxially to each other. This means that the hole for receiving the dental implant screw passes completely through the shaft and interface.

However, according to a preferred embodiment, it is also conceivable to arrange shaft and interface at an angle to each other. That means the both longitudinal axes of the shaft and interface extending obliquely to each other lying in a plane.

Even more flexible, the position-sensing unit is when, according to a preferred embodiment, shaft and interface are connected to each other via a hinge, so that the angle between the shaft and interface is adjustable.

A further increase in flexibility can be achieved that, according to a preferred embodiment, shaft and interface are formed as separate interconnectable, preferably releasably connectable components. For example, an interface can be used with shafts of different lengths.

Preferably, the connection between the shaft and the interface is a latching connection, clamping connection and / or screw connection.

In a preferred embodiment, the dental implant screw is designed such that the screw head is in the region of the other longitudinal end of the transfer post.

This means in other words that the screw head of the dental implant screw in the region of the opposite end of the interface and thus is easily accessible from the outside with a tool to turn the dental implant screw and turn it. Preferably, the screw head is located in the upper half of the transfer post.

[0014] In a preferred development, the stop element is provided as a ball segment-like projection on the transfer post. More preferably, the fixing element comprises a spherical segment-like disc and a nut, wherein the disc can be pushed or pushed onto the transfer post and the screw nut cooperates with a thread provided at the other longitudinal end of the transfer post. Further preferably, the first section of the carrier device comprises at least one elongated hole opening, preferably a plurality of slot openings through which the transfer post can be pushed through.

With the help of these measures, it is easily possible to fix the transfer post in different angular orientation to the carrier unit. The carrier unit is received between the two spherical segment-like components, so that a clamping by the fixing screw in different directions is possible.

In a preferred embodiment, the stop element is designed as a screwable stop element. This means that it can be screwed onto the threaded shank and is therefore not an integral part of the shank.

The advantage of this measure is that the distance between the carrier unit and interface and thus the effective height of the shaft is adjustable.

In a preferred embodiment, the position-receiving unit has two Unterlegplättchen, each with a bore, wherein the diameter of the bore is larger than the diameter of the transfer post, but smaller than the maximum diameter of the stop element or the spherical segment-like disc.

In other words, that means that the clamping takes place via the two shims, between which lies a region of the carrier unit. The two spherical segment-like components interact with the shims in this case.

In a preferred embodiment, the disc and the nut of the fixing are provided as a unit.

This measure leads to a simplification of handling.

In a preferred embodiment, the second portion of the carrier unit is designed for receiving a face bow. In a preferred embodiment, the first portion of the carrier unit in the edge region on hole elements.

Further advantages and embodiments of the invention will become apparent from the description in the accompanying drawings.

It is understood that the features mentioned above and those yet to be explained not only in the particular combination, but also in other combinations or alone, without departing from the scope of the present invention.

An embodiment of the invention is shown in the figures and will be explained in detail below by way of example. Showing:

Fig. 1 is a schematic representation of a position-receiving device;

Fig. 2 is a view of a position receiving unit;

3 is a sectional view of the previously shown position-receiving unit;

4 shows two illustrations of a position-receiving unit according to a second embodiment;

Fig. 5 shows two representations of a position-receiving unit according to a third

embodiment;

Fig. 6 shows two representations of a position-receiving unit according to a fourth

embodiment;

Fig. 7 shows three representations of a position-receiving unit according to a fifth

embodiment; 8 shows three illustrations of a position-receiving unit according to a sixth embodiment;

Fig. 9 shows three representations of a position-receiving unit according to a seventh

embodiment;

10 shows three representations of a position-receiving unit according to an eighth

embodiment;

Fig. 1 1 shows three representations of a position-receiving unit according to a ninth

embodiment;

FIG. 12 shows two illustrations of a shim according to a second embodiment; FIG. and

13 shows two illustrations of a shim according to a third embodiment.

In Fig. 1, a position receiving device is shown and designated by the reference numeral 10. The position-receiving device 10 has a carrier unit 12, which is divided into a first section 14 and a second section 16. The first portion 14 is substantially U-shaped and thus substantially conforms to the shape of a human jaw. Various carrier units 12 with different first sections 14 may be provided to accommodate the different jaw sizes.

The second section 16 is connected to the first section and serves as a handle for the dentist.

As is apparent from Fig. 1, the first portion and second portion are formed as flat elements which lie in a plane. The first portion 14 has at least one, preferably a plurality of elongated holes 20 which extend along the U-shape of the first portion. In the present embodiment, the two legs of the U-shaped portion each have a slot 20 and the two legs connecting base also includes a slot or an opening 20th

Long holes 20 are bounded by an edge 21 which carries openings 22 which are preferably evenly spaced. The edge 21 has flat surfaces both at the top and at the bottom, which serve as a support or clamping surface.

On the support unit 12, in particular on the first section 14, one or more position-receiving units 30 can be fixed, with a total of four such position-receiving units 30 being shown in FIG. With the help of such a position-receiving unit 30, the position of a dental implant 60, which is used in the jaw 66 of a patient record. The position is, in particular, an angular position relative to the carrier unit or of the first section 14 and the position relative to other dental implants in the corresponding jaw 66. If the position-receiving units 30 are fixed to the carrier unit 12, it is easy to check, for example the dental implant analogs 61 used in a jaw model 67 correctly, ie are arranged as in the patient's mouth.

The position-receiving unit 30 comprises, as can be seen in Figures 2 and 3, a transfer post 32 which is formed as a rotationally symmetrical elongate member. The transfer post 32 has at its one longitudinal end an interface 34 which is adapted to cooperate with a dental implant. As is generally known, dental implants usually have an internal area which, inter alia, has indexing and anti-rotation elements. The interface 34 is adapted to such a region of a dental implant. This means that the interface 34 can be different, depending on which dental implant system is used. At the interface 34, an elongated shaft 36 connects, which ends at the other longitudinal end of the transfer post. The interface and the shaft are preferably arranged coaxially, ie their respective longitudinal axes L coincide.

The transfer post 32 is penetrated by a bore 40 which extends over the entire length, but with different diameters. Thus, the diameter of the bore in the region of the interface 34 is smaller than in the opposite upper region of the shaft 36.

On the shaft 36, a stop element 38 is provided, which extends in an annular manner around the shaft 36 and the interface has a straight annular surface which is perpendicular to the longitudinal axis. The opposite surface of the stop element 38 is formed spherical segment-like or dome-shaped, so that seen in the longitudinal direction different outer diameter. The shape of this stop member 38, i. of the spherical segment-like projection, is designed such that a lower plate 70 can rest in different angular positions (relative to the longitudinal axis) on the stop element 38 as far as possible along the entire edge of a central bore 72 of the shim. The Unterlegplättchen 70 has in addition to the central bore 72 at least two open-edge slots 74 on.

As can be seen from the sectional view of FIG. 3, the stop element 38 is an integral constituent of the shaft 36.

The shaft 36 has at its upper longitudinal end an external thread 39 which can cooperate with a fixing screw or fixing nut 50. The nut 50 has an external hex, so that the nut can, for example. With a wrench can be rotated. Of course, it would also be conceivable to provide the nut 50 in the upper area with a hexagon socket in order to allow a screwing in and out. The nut 50 has a through hole 52, so that -in the screwed state- the bore 40 of the transfer post 32 is accessible from the outside.

Below the nut 50, an annular disc 54 is provided in Fig. 3, wherein the downwardly facing surface of the annular disc 54 is also formed spherical segment-like or dome-shaped. This spherical segment-like shape preferably corresponds to the shape of the stop element 38. As can be seen from FIG. 3, the two spherical segment-like surfaces thus face one another.

The annular disc 54 is attachable to the shaft 36 and is held by the nut 50 in the longitudinal direction upwards.

Although it is in the illustrated embodiment, two components in the nut 50 and the annular disc 54, these two can also be combined into a single component.

The spherical segment-like surface of the annular disc 54 is intended to cooperate with the upper Unterlegplättchen 70 such that the edge of the bore 72 of the Unterlegplättchens rests on the spherical segment-like surface as fully as possible.

A transfer post 32 can thus be clamped on the first section of the carrier unit 12 via the two shims. For this purpose, a shim is first attached to the shaft 36 until the edge of the bore 72 rests on the stop element 38. Subsequently, the first portion is attached to the slot 20 on the shaft 36, so that the edge 21 rests on the lower shim. Then the second shim is placed from above. Finally, via the nut 50 and the annular disc 54, the upper shim plate can be pushed down so that the transfer post 32 is clamped to the carrier unit. By providing the two spherical segment-like surfaces, the transfer post 32 can be clamped in different angular positions relative to the carrier unit.

In Fig. 3 is still a dental implant screw 42 can be seen, which extends through the bore 40, the dental implant screw 42 is at one end with a thread 43 and at the other end with a screw head 44, the example. is designed as a hexagon socket, provided. The length of the dental implant screw is selected such that the screw head lies in the upper half of the shaft 36, in particular in the immediate vicinity of the upper end of the shaft 36.

Regardless of the clamping on the nut 50, the transfer post 32 can be about the dental implant screw 42 and its thread 43 screwed to the dental implant 60. Since the screw head 44 of the dental implant screw 42 is close to the upper longitudinal end of the shaft 36, the screw head is very easily reachable with a conventional tool from above through the bore 52 of the nut 50. The screw head 44 may, for example, be formed as a hexagon socket.

To record a plurality of dental implants in the mouth of a patient, first the transfer posts 32 are inserted with their interfaces 34 in the corresponding dental implants 60 and then fixed on the dental implant screws 42. Then Unterlegplättchen 70 are attached to the transfer post, which also rest on the stop elements 38. In the next step, the carrier unit 12 is attached so that the first section 14 rests on the lower shim plate 70. Subsequently, the upper Unterlegplättchen be plugged onto the transfer posts and then clamped on the nuts 50 with the annular discs 54. The transfer posts 32 are fixed so firmly with the carrier unit 12. By means of a corresponding tool, the tooth implant screws 42 can be released in the next step so that the entire position-receiving device 10 can be removed from the patient's mouth. With the help of this position-receiving device 10 and the fixed transfer post 32 can now be checked whether the model produced corresponds exactly to the oral situation.

With reference to FIGS. 4 to 11, further embodiments of a position-receiving unit 30, in particular of the transfer post 32, are shown below. However, a description of the parts identified by the same reference numerals is omitted below. Rather, only the differences from the position-receiving unit 30 described in detail with reference to FIG. 3 will be discussed.

The position-receiving unit shown in Fig. 4 is designated by the reference numeral 30a, wherein not all parts are shown for simplicity. The position-receiving unit 30a also includes a transfer post 32, which is divided into a shaft 36 and an interface 34. In contrast to the transfer post 32 shown in FIG. 3, the shaft 36 is provided with an external thread 45 that extends over preferably the entire length of the shaft 36.

The stop element 38 is designed as a separate, i. not integrally formed with the shaft 36 stop member 38 a formed. The stop element 38a is provided with an internal thread 47, which can cooperate with the external thread 45 of the shaft 36. The stop element 38a is thus displaceable along the longitudinal axis L of the shaft 36. It only has to be rotated around the longitudinal axis.

On the one hand to facilitate rotation and on the other hand for fixing the position of the stop element 38 a bores 48 are provided which extend radially through the stop element 38 a therethrough. The number of holes 48 provided is arbitrary, preferably, the existing holes are distributed uniformly in the circumferential direction. The displaceability of the stop element 38a allows the height adjustment, ie the adjustment of the distance between the carrier unit 12 and the lower end of the interface 34th

In FIG. 4, the annular disk 54 and the fixing element 50 can not be seen for reasons of clarity. However, the operation of these two elements corresponds to that described in Figures 2 and 3 operation. The annular disc 54 can be plugged onto the shaft and the fixing element 50 can be screwed onto the shaft, for which purpose the external thread 45 serves.

In Fig. 5, a third embodiment of a position-receiving unit is shown and designated by the reference numeral 30b.

The difference to the position-receiving unit 30 shown in Fig. 3 is that the interface 34 and the shaft 36 are not coaxial with each other but at an angle to each other. This means that the longitudinal axis La of the interface 34 and the longitudinal axis Lb of the shaft 36 enclose an angle W, which may preferably be 15 ° or 30 °.

From the first illustration in Fig. 5 shows that the two longitudinal axes La and Lb, although obliquely to each other, but are still in a plane.

In order to attach the dental implant screw 42, the interface 34 is provided with the bore 40, which fully penetrates the interface 34. The dental implant screw 42 can thus be inserted from above into the interface 34.

However, for this it is necessary that the shaft 36 extending away from the interface 34 leaves open the insertion region for the dental implant screw 42.

Since the shaft 36 is no longer used to hold the dental implant screw, therefore, no drilling is required in it. 6, a position-receiving unit according to a fourth embodiment is shown and designated by the reference numeral 30c. The position sensing unit 30c is based on the position sensing unit 30b previously described with reference to FIG. The only difference is that the stop element 38 is designed as a stop element 38a displaceable along the longitudinal axis Lb. It thus corresponds to the stop element 38a according to FIG. 4.

The shank 36 is therefore also provided with an external thread 45 extending along the at least upper portion of the shank, which cooperates with that in the internal thread 47 of the stop element 38a.

The mode of operation of the displaceable stop element 38a has already been described with reference to FIG. 4, so that reference is made to this.

In Fig. 7, a fifth embodiment of a position-receiving unit is shown in three views and designated by reference numeral 30d.

This embodiment is based on the embodiment shown in Fig. 6, however, with the difference that the angle W between the longitudinal axis La of the interface 34 and the longitudinal axis Lb of the shaft 36 is adjustable.

This angle adjustment is achieved by a hinge 78, via which the shaft 36 is connected to the interface 34.

Preferably, the hinge 78 has a tab 80 which is connected to the interface 34 and extending obliquely to the longitudinal axis La to the outside. At the end of the tab 80, a bore 82 is provided.

The counterpart of the joint 78 is provided on the shank 36 U-shaped receptacle 84, which comprises two tabs 85, each having a bore 86. The distance between the two tabs 85 is chosen to be minimally larger than the thickness of the tab 80, so that the U-shaped receptacle 84 can be plugged onto the tab 80 such that the Holes 82 and 86 are aligned. The connection of the two joint parts 80, 84 can then take place, for example, via a hinge pin or a hinge screw 88, which is inserted into the bore 82 and 86.

In addition, a means is provided to fix the angular position of interface 34 and shaft 36 to each other. This can be done, for example, in that the two tabs 85 of the U-shaped receptacle 84 are pressed together by means of a screw connection, so that a frictional engagement between the tab 80 and the two tabs 85 results.

The position-receiving unit 30d illustrated in FIG. 7 is also provided with a stop element 38a which can be displaced along the longitudinal axis Lb, as has already been described with reference to FIG.

Of course, this displaceable stop element 38a could also be replaced by a stop element 38, which is an integral part of the shaft 36.

Several embodiments of a position-receiving unit are shown with reference to FIGS. 8 to 11, which differ from the position-receiving unit 30 described with reference to FIG. 3 by a two-part construction of the transfer post 32.

FIG. 8 shows a position-receiving unit 30e which differs from the position-receiving unit 30 in FIG. 3 only in that the interface 34 and the shaft 36 of the transfer post 32 are not formed in one piece.

Rather, the interface 34 and the shaft 36 are formed as independent, preferably rotationally symmetrical elements, which, however, can be detachably connected to one another again, for example by means of a latching connection 90. In the variant shown in Fig. 8, the latching connection 90 is designed so that an end portion of the interface 34 in a bore 91 at the lower end of the shaft 36 is insertable.

The connection of the shaft 36 with the interface 34 then takes place via an O-ring 92, which lies in a suitably equipped annular groove 94 on the outside of the interface 34. The configuration of the annular groove 94 and the adjacent regions of the interface 34 is such that upon insertion of the interface 34 in the bore 91 of the O-ring 92 is held fixed in position. The O-ring 92 must not move out of the annular groove 94.

In the bore 91, a corresponding annular groove 96 is provided on the inner wall, which is positioned so that the O-ring 92 in the desired insertion position of the interface 34 in the annular groove 96 "locks".

The advantage of this two-part construction is that a shaft 36 can be used for a wide variety of interfaces 34. In addition, it is also very easy to use shafts 36 of different lengths with an interface 34.

In Fig. 9, another variant of a locking connection 90 is shown.

The releasable connection between the shaft 36 and the interface 34 is ensured via locking lugs 98, which are provided in the lower region of the shaft 36. These latching noses 98, two or more of which may be provided on the inside of the bore 91 of the shaft 36, cooperate detent with a corresponding recess 97 which is provided on the outside of the interface 34. Preferably, the recess 97 is provided as a groove extending in the circumferential direction.

Of course, the circumferential recess 97 can also be replaced by a plurality of separate recesses. Since the locking lugs 98 must be pressed when plugging outward away from the longitudinal axis L, 91 slots 99 are provided in the shaft 36 in the region of the bore. By means of these slots 99, this section of the shaft 36 receives sufficient flexibility in the radial direction, so that the latching lugs can slide over the conically shaped peripheral surface of the interface 34 as far as the recesses 97.

10, a further embodiment of a position-receiving unit 30 is shown and designated by the reference numeral 30g.

This difference is that the connection of interface 34 with shaft 36 does not take place along a common longitudinal axis L, but that in the assembled state the longitudinal axis La of the interface 34 includes an angle with the longitudinal axis Lb of the shaft 36. This angle may preferably be in the range of 15 ° to 30 °.

However, the latching connection 90 corresponds to the latching connection shown and described in FIG. 9.

In Fig. 1 1, a further variant of a position-receiving unit is shown and designated by the reference numeral 30h. The difference from the detent connections described above with reference to FIGS. 8 to 10 here lies in the connection between the interface 34 and the shaft 36. This connection is made by means of a screw 106.

The upper portion of the provided in the interface 34 bore is provided with an internal thread 108 into which the screw 106 can be screwed.

Within the bore of the shaft 36, a stop shoulder 1 10 is provided, which cooperates with a screw head 1 12 of the screw 106 such that the screw head 1 12 is supported on the shoulder 1 10 and when turning the Screw the interface 34 pulls in the desired stop. In this case, a lower ring edge 1 14 of the shaft 36 on a correspondingly formed annular shoulder 1 16 at the interface 34.

At this point it should be noted that, of course, other possibilities of releasable connection between shaft 36 and interface 34 are conceivable.

In the two figures 12 and 13, two embodiments of Unterlegplattchen are shown and designated by the reference numerals 70a and 70b. In contrast to the backing plate 70 shown in FIG. 1, which has two open-edged elongated holes 74, the backing plates 70a, 70b have three or four elongate holes 74.

These embodiments allow greater flexibility and security.

Claims

claims

1 . A dental implant position-receiving device in a patient's mouth, comprising a carrier unit (12) having a first portion (14) for insertion into the patient's mouth and a second portion (16) for handling, and

at least one position-receiving unit (30) comprising a dental implant screw (42), an elongate transfer post (32) having a shaft (36), an interface (34) and a bore (40) for receiving the dental implant screw, and a fixing element (50, 54),

wherein the shaft (36) has a stop element (38) and the interface (34) is designed for connection to a dental implant, and

wherein the fixing element (50, 54) and the stop element (38) are designed such that a fixing of the transfer post (32) to the carrier unit (12) in more than one angular position is possible.

2. Position recording device according to claim 1, characterized in that the shaft (36) and the interface (34) are arranged coaxially to each other.

3. Position-receiving device according to claim 1, characterized in that the shaft (36) and the interface (34) are arranged at an angle to each other.

4. Position-receiving device according to claim 3, characterized in that the shaft (36) and the interface (34) via a joint (78) are interconnected, such that the angle between the shaft and interface is adjustable.

5. Position recording device according to one of claims 1 to 4, characterized in that the shaft (36) and the interface (34) are formed as separate interconnectable, preferably releasably connectable components.

6. Position recording device according to claim 5, characterized in that the connection between the shaft and interface a latching connection (90), a clamping connection and / or a screw connection (106, 108).

7. Position recording device according to one of the preceding claims,

characterized in that the dental implant screw (42) is designed such that its screw head (44) is located in the region of the other longitudinal end of the transfer post.

8. Position-receiving device according to one of the preceding claims,

characterized in that the stop element (38) is provided as a spherical segment-like projection on the transfer post.

9. Position receiving device according to one of claims 1 to 7, characterized in that the stop element (38) is designed as a spherical segment-like screwable stop element (38 a) which on the threaded (45) provided with shank (36) can be screwed, so that the Longitudinal position of the stop element (38a) is variable.

10. Position recording device according to one of the preceding claims,

characterized in that the fixing element (50, 54) comprises a spherical segment-like disc (54) and a nut (50), wherein the disc (54) can be pushed onto the transfer post and the nut cooperates with a thread provided at the other longitudinal end of the transfer post.

1 1. Position-receiving device according to claim 10, characterized in that the first portion (14) of the support device (12) has at least one slot opening (20), preferably a plurality of slot openings through which the transfer post can be inserted.

12. Position recording device according to one of claims 1 to 1 1, characterized

characterized in that the position-receiving unit (30) comprises two shims (70) each having a bore (72), wherein the diameter of the bore larger than the diameter of the transfer post but smaller than the maximum diameter of the stop element or the spherical segment-like disc.

13. Position-receiving device according to one of claims 10 to 12, characterized in that the disc (54) and the nut (50) of the fixing element are provided as a unit.

14. Position picking device according to one of claims 10 to 13, characterized in that the two Unterlegplattchen (70) in the fixed state, a portion of the first portion of the support unit between them, wherein the clamping force is applied by the stop element and the fixing element.

15. Position recording device according to one of claims 1 to 14, characterized

characterized in that the second portion (16) of the carrier unit is designed to receive a face bow.

16. Position recording device according to one of claims 1 to 15, characterized

in that the first section (14) of the carrier unit has perforated elements (22) in the edge region.