HK1193334B - Dental implant system and associated insertion instruments - Google Patents

Abstract

A planting system,It includes an insertion component composed of a spiral component and a neck component,The neck component includes a groove in its neck end face,The groove is suitable for fixing abutments,The neck component has a protruding portion at a certain distance from the neck end face,-An insertion tool for tightening the insertion component,The insertion instrument comprises a handle component and a socket component with a socket end face,The end face of the socket has an opening, and at least the driving component of the opening is defined laterally by the wall,The driving component has a cross-section at a right angle to the longitudinal axis,Therefore, the driving component can appropriately accommodate the neck component of the insertion component and transfer the fastening torque to the insertion component through the protruding portion,Wherein the opening of the insertion instrument has a bridging component,The bridging component is adjacent to the driving component and surrounds the neck component located next to the protruding portion and extending to the neck end face,So that when the driving component of the opening surrounds the protruding portion of the neck component,There is a gap between the bridging component and the neck component.

Description

Dental implant system and associated insertion instrument

Technical Field

The invention relates to a dental implant system comprising an insertion part and an insertion instrument.

The invention further relates to an insertion instrument forming part of an implant system and for fastening an insertion component, and to an auxiliary insertion instrument forming part of an implant system and for providing an insertion component, and to an assembly associated with a package.

Background

Such implant systems are well known and are used as replacements for tooth elements lost in the mouth. This is done by drilling a hole in the jawbone and screwing or pressing the insertion member into it. Abutments, healing caps or similar insertion elements are placed one after the other on the neck part of the insertion part protruding from the gingiva and at some later time usually a dental restoration or a crown or similar element is placed, although in principle straight segments are also available.

Whether stabilized by yttrium or not, the inserts are increasingly made of materials containing zirconia to eliminate the drawbacks resulting from the use of titanium inserts. This has the advantage that the titanium grey color no longer appears in the gums or, when the gums are further contracted, a visible, metallic, grey edge of the insertion part is no longer created over time. Furthermore, the occurrence of swelling after surgery may be reduced, the risk of inflammation may be reduced, and bone resorption may be frequently reduced.

The insertion part of a two-part dental implant is usually accommodated in the jawbone by means of an insertion instrument which is inserted into a recess of the neck portion of the insertion part.

International patent application WO2010/053352Al in the name of the present applicant discloses an insertion part of a two-part zirconium dental implant according to the opening paragraph, said insertion part comprising one or more protrusions on the outside of the neck part, and an insertion instrument having a recess which can be engaged with said protrusions, so that the insertion part can be provided in the jawbone by means of a rotational movement, after which said insertion part is firmly fixed therein by screwing or fastening.

Since it has proven to be feasible to apply a great force of about 30 to 45Ncm to screw the insertion part into the jawbone, such an implant system produces a very good result in terms of a high initial stability, that is to say a high stability immediately after the screwing operation and before the insertion part and the jawbone grow together. Such an implant system furthermore has the advantage that the insertion part can be loaded directly, provided the bone mass allows it. Other advantages are as follows: significantly reducing the risk of complications and accommodating the insertion member directly after extraction of the original tooth or molar, and allowing the insertion member to be placed by a general dental practitioner or dentist without the need for specialist assistance.

Despite the above-mentioned advantages of implant systems, it has been found that damage to the insertion part can still occur during the fastening thereof.

Disclosure of Invention

It is an object of the present invention to provide an improved implant system of the type described above. The present invention aims in particular to provide an improved implant system of the type described above, wherein the insertion part is no longer damaged during the fastening operation.

This object is achieved by means of an implant system according to the following solution.

A dental implant system comprising

An insertion part of a two-part dental implant, which insertion part is of elongated shape and, viewed in the longitudinal direction, consists of two parts, on the one hand a screw part which has an external thread over at least part of its length and, on the other hand, a neck part which is located at one end of the insertion part and which contains a recess in its neck end face which is suitable for fixing an abutment, a healing cap or a similar insertion element,

the neck part having one or more protruding portions at a distance from the neck end face, the protruding portions being located on the circumference of the neck and extending in a radial direction,

the insert is made entirely or substantially entirely of a material containing zirconia, and

an insertion instrument for tightening the insertion member of the two-part dental implant, the insertion instrument comprising a driveable elongate handle member terminating in a socket member having a socket end face extending generally perpendicular to a longitudinal axis of the handle member,

said socket part having an opening terminating in said socket end face and at least a drive part of said opening being laterally delimited by one or more walls, said drive part of said opening having a cross-section at right angles to said longitudinal axis, said cross-section being non-circular and having a shape and dimensions suitable for at least partially accommodating said neck part of said insert part and for transferring a tightening torque applied to said handle part to said insert part by means of said protruding portion,

the opening of the insertion instrument has a bridge member that abuts a side of the drive member facing the interior of the opening,

the bridge member surrounds the neck member alongside the protruding portion and extending to the neck end face such that there is a gap between the bridge member and the neck member when the driving member of the opening surrounds the protruding portion of the neck member.

The bridge part surrounds the neck part beside the projection, so that a gap is present between the bridge part and the neck part, as a result of which, when the open drive part surrounds the projection of the neck part, no contact between the bridge part and the neck part occurs anymore and no mechanical load is determined to be present.

In the prior art, the problem of chipping of dental implants occurs in particular in the case of implants made of zirconia, since this material is relatively brittle compared to titanium. The neck part of the insertion part is tightly surrounded by the insertion instrument in order to place the insertion part into the oral cavity and fix them in the jawbone without contact by the human hand. This avoids contact with the human hand and thus prevents the insertion part from becoming contaminated, which, however, makes the bridge part of the insertion instrument tightly around the neck part, for example because the opening in the bridge part is slightly conical and therefore there is no intervening space. The fracture is more likely to occur with a neck part that is slightly inclined or rounded near the end face of the bridge part, since such a neck part is very thin and therefore particularly fragile at the location of the inclined edges or rounded parts.

In the system according to the invention, such close enclosure or any other mechanical load is eliminated, since there is at least some intermediate space.

The presence of the intermediate space also renders the insertion instrument unsuitable for firmly gripping the insertion part, i.e. at least not automatically gripping the insertion part. This aspect can be solved, for example, by means of an auxiliary insertion instrument, by means of which the insertion part can be placed into the oral cavity and screwed into the jawbone bore to a certain extent, i.e. at least to a certain extent, wherein the external thread of the insertion part engages with the pre-tapped internal thread of the jawbone bore without the need to touch the insertion part and thus possibly contaminate the insertion part. Subsequently, the auxiliary insertion instrument can be removed from the person's mouth and the insertion part can be screwed further into the jawbone and fastened firmly by means of the insertion instrument.

The above-described solution is not obvious to the person skilled in the art, since he will first of all start from a preoccupation recognized in the art, in that, as a result of these methods, it is no longer possible to place the insertion part into the mouth without touching it and to screw it down to some extent, or with only great difficulty, for example using tweezers.

An embodiment of the dental implant system according to the invention is characterized in that the gap remains unchanged until the insertion instrument forms an inclined position of approximately 5 degrees with respect to the longitudinal axis of the insertion part. As a result, the limited tilting position of the insertion instrument relative to the neck part of the insertion part, which occurs during normal manual handling of the insertion instrument, likewise does not cause damage to the neck part.

In another embodiment, the walls of the drive member are prismatic and the bridging member is laterally delimited by one or more walls, which are also prismatic and aligned with the walls of the drive member. This embodiment is advantageous from a production-technical point of view and is suitable for insert parts having a neck part which is embodied so as to be reduced to a limited extent in the vicinity of the neck end face, i.e. it narrows in the direction of the neck end face.

In a further embodiment, the bridge member widens laterally relative to the drive member in any radial direction with respect to the longitudinal axis of the insertion instrument. This ensures that there is a sufficient intermediate space between the neck part and the bridge part, also in the case of a straight (i.e. non-tapering) neck part.

In a further embodiment, the bridge member, which is inserted into the opening of the instrument, abuts the drive member in a non-staggered manner and widens gradually in the inward direction. In other words, the intermediate space between the neck part and the bridge part increases with increasing distance from the drive part. Thereby, the intermediate space is increased at positions where it is necessary to obtain a limited tilting position of the insertion instrument relative to the insertion part.

Yet another embodiment of the implant system according to the invention comprises an auxiliary insertion instrument for providing the insertion member, the auxiliary insertion instrument having a handle and a top member connected thereto, the top member being shaped and sized to fit tightly in a recess in the neck member of the insertion member, the top member comprising at least two legs, end portions of which can be resiliently moved towards and away from each other. Advantageously, the top part is made of metal, for example stainless steel.

By implementing the top part, contact between the insertion part and the human hand or other elements, which may contaminate the insertion part with substances that may cause irritation to the patient due to manual placement of the insertion part into the human mouth, can be avoided. Thereby, it becomes easier to create the necessary hygienic conditions for placing the insertion part and possibly the associated abutment in a medically healthy manner into the mouth of the person.

The invention further relates to an insertion instrument for tightening an insertion part of a two-part dental implant, which insertion instrument employs the following solution. An insertion instrument for tightening an insertion member of a two-part dental implant, the insertion instrument comprising an elongate handle member to be driven and terminating at a socket member having a socket end face extending generally at right angles to a longitudinal axis of the handle member, the socket member having an opening terminating at the socket end face, the opening being laterally bounded on at least a drive member thereof by one or more walls, the drive member of the opening having a non-circular cross-section at right angles to the longitudinal axis and being shaped and sized such that the drive member is adapted to at least partially receive a neck member of the insertion member with a radial projection and to transfer a tightening torque applied to the handle member to the insertion member by means of the projection, the opening of the insertion instrument having a bridge member, the bridge member abuts a side of the drive member facing the inside of the opening. The advantages of this insertion instrument are similar to the dental implant system described above.

In one embodiment of the invention, the bridge parts in the openings adjoin the drive part in a non-staggered manner and widen gradually inwards. This makes it possible to ensure that there is a sufficient intermediate space also in the case of a rectilinear (i.e. non-narrowing) neck part of the insert part.

The invention further relates to an auxiliary insertion instrument for providing an insertion member of a two-part dental implant comprising a handle and a top member connected thereto, the top member being shaped and sized to fit tightly in a recess in a neck member of the insertion member, the top member comprising at least two legs, end portions of which are movable towards and away from each other. The advantages of such an insertion instrument have already been described above in terms of an implant system according to the invention.

Finally, the invention relates to an assembly of an insertion part, an auxiliary insertion instrument and a packaging for a two-part dental implant, in which assembly

The insertion part is elongated and, viewed in the longitudinal direction, consists of two parts, on the one hand a screw part which has an external thread over at least part of its length and, on the other hand, a neck part which is located at one end of the insertion part and which comprises a recess in its neck end face which is suitable for fixing an abutment, a healing cap or a similar insertion element, which neck part has one or more protrusions at a distance from the neck end face which protrusions are located on the circumference of the neck and extend in the radial direction, which insertion part is made completely or substantially completely of a material containing zirconium oxide,

in the recess of the neck part of the insertion part, a top part on which an auxiliary insertion instrument has been applied, and

the packaging forms an envelope of the insertion member and the auxiliary insertion instrument, said packaging sealing the insertion member and the auxiliary insertion instrument to ensure sterility thereof.

By means of such an assembly, it will be easier to store the insertion part according to the invention for a long period of time, transport the insertion part, and at some point put the insertion part in the human jawbone in a medically healthy way (i.e. without touching the insertion part anyway with the human hand and avoiding other possible sources of contamination), after the insertion part has been assembled and sterilized.

Drawings

The invention will now be described in more detail with reference to the drawings, in which corresponding parts are designated by the same reference numerals.

Figure 1a shows a perspective view of an embodiment of the implant system according to the invention with an insertion instrument positioned on the insertion part.

FIG. 1b is a similar perspective view of the system shown in FIG. 1a with the insertion instrument in line with the insertion member.

Fig. 2a and 2b are two longitudinal sectional views of the insert part shown in fig. 1, while fig. 2c is a front view of the end face of the neck of this insert part.

FIG. 3a is a side view of the insertion instrument of FIG. 1; fig. 3b is a cross-sectional view of this insertion instrument, taken along the line a-a in fig. 3a, and fig. 3c is a longitudinal cross-sectional view of the socket part of this insertion instrument.

Fig. 4a is a side view of an auxiliary insertion instrument according to the invention, while fig. 4b shows an end view of such an auxiliary instrument accommodating a top part.

Detailed Description

Fig. 1a shows a two-part dental implant system S comprising an elongated insertion part 1 and an insertion instrument 2. As is also shown in fig. 2a and 2b, the insertion part 1, viewed in the longitudinal direction, consists of two parts, on the one hand a screw part 3 with an external thread 4 and, on the other hand, a neck part 5, which neck part 5 is located at one end of the insertion part 1 and contains a groove portion 6 in its neck end face 7 (see fig. 2b and 2c), which groove portion 6 is suitable for fixing an abutment. The neck part 5 has one or more protrusions 8 at a distance from the neck end face 7, which protrusions 8 are located on the circumference of the neck and extend in the radial direction. Between the neck end face 7 and the protruding portion 8, the diameter is slightly reduced compared to the minimum diameter at the level of the protruding portion 8. In this exemplary embodiment, the insert part 1 is made entirely of a zirconia containing ceramic material stabilized with yttrium, although other zirconia containing materials may be used in accordance with the present invention.

The insertion instrument 2, shown in more detail in fig. 3a, comprises an elongated handle member 9 terminating in a socket member 10, said socket member 10 having a socket end face 11 extending perpendicular to the longitudinal axis of the handle member 9. The socket part 10 has an opening 12 (see fig. 3b and 3c) ending at a socket end face 11, said opening 12 having a drive part 13 and a bridge part 14, said bridge part 14 abutting said drive part 13 on the side of the drive part 13 facing the inside of the opening 12, i.e. the side facing the handle part 9 and facing away from the socket end face 11. In the drive member 13, the opening 12 is laterally delimited by a wall and has a cross-section at right angles to the longitudinal axis L (see fig. 3a and 3c), which is substantially hexagonal, i.e. non-circular, and which is shaped and dimensioned for at least partially accommodating the neck member 5 of the insertion member (as shown in fig. 1a and 1 b) and for transferring a stiffening moment applied to the handle member 9 to the insertion member 1 by means of said six protrusions 8 located around the neck.

In the embodiment shown, the bridge part has a frusto-conical shape, i.e. with an inwardly increasing diameter in the opening 12 (that is to say in a direction away from the end face of the socket), and abuts the drive part in a substantially non-staggered manner. Due to the conical shape, when the driving member 13 with the opening of the six groove parts surrounds the protruding part of the neck member, the bridge member 14 surrounds the neck member 16 which is located beside the protruding part 8 and extends to the end face of the neck member (see also fig. 1b and 2b for the neck member), so that there is a gap between the bridge member and the neck member.

In this exemplary embodiment, an intermediate space can be created, on the one hand, due to the slight reduction of the diameter of the neck part 5 between the neck end face 7 and the projection 8, and on the other hand due to the increase of the diameter in the bridge part 14 in the direction of the handle part 9. Each of these two methods may be applied separately, but in this exemplary embodiment, they are applied together such that in all cases (including the occasional occurrence of an inclined position of the insertion instrument up to about 5 degrees relative to the insertion member), a gap still exists between the neck member 5 from the neck end face 11 to the projecting portion 8 (on the one hand) and the bridge member 14 (on the other hand). In this exemplary embodiment, the wall of the drive member 13 is substantially prismatic, in particular for enabling an insertion instrument to be arranged on the projection 8 and removed from the projection 8 in a simple manner. In this exemplary embodiment, the depth of the opening 12 is such that the mouthpiece part 10 surrounds exactly the entire neck part 5 of the insert part 1 when said neck part 5 is pressed with its neck end face against the end of the opening 12.

In an exemplary embodiment (not shown), the bridge member widens laterally relative to the drive member in any radial direction relative to the longitudinal axis of the insertion instrument (i.e., already at the transition from the drive member to the bridge member). In this way, when an insertion member whose size is not reduced near the neck end face portion is used, the intermediate space can be secured as well.

Fig. 4a shows an auxiliary insertion instrument 17, which auxiliary insertion instrument 17 relates to the implant system shown in fig. 1 to 3 and is used to provide the insertion part 1. The auxiliary insertion instrument 17 has a handle 18 and a top member 19, which top member 19 is integral with the handle 18 in this exemplary embodiment. The top member comprises three resilient legs 20. The auxiliary insertion instrument 17 is made of stainless steel and the legs 20 are shaped sufficiently thin so that they can move resiliently towards the longitudinal axis of the auxiliary insertion instrument 17 and thus also towards and away from each other. Furthermore, when the top ends 21 of the legs 20 are inserted into the opening 6 of the insertion part, they are slightly rounded and smoothed to prevent damage to the insertion part 1. Furthermore, by means of said rounded shape of the top ends 21 of the legs 20, the legs 20 can be resiliently moved towards each other when the top part 19 is provided in the opening of the insert part 1. Beside the top end, in a direction more towards the handle 18, said legs 20 have outer walls 22, said outer walls 22 being together parallel to the longitudinal axis of the auxiliary insertion instrument 17, and beside said outer walls, in a direction even more towards the handle 18, the legs 20 together have an outer diameter which becomes smaller in a direction towards the handle 18. The rounded shape and the parallel outer walls 22 of the tip end and the constricted diameter allow the legs 20 to be inserted into the opening 6 of the insertion part 1 so as to fit tightly therein by pressing the auxiliary insertion instrument 17 in a simple manner and without further tools being pressed into the opening 6 of the insertion part 1. Subsequently, the insertion member 1 can be held, supported, and moved using only the auxiliary insertion instrument 17.

Not shown in the drawings, when the top part 20 is inserted into the opening 6, the auxiliary insertion instrument 17 and the insertion part 1 are jointly assembled in a package consisting of a substantially cylindrical glass tube with a reclosable metal lid, which does not contain synthetic resin elements or other contaminating substances. In use, the package containing the auxiliary insertion instrument 17 and the insertion part 1 is sterilized, after which the package is transported, stored and used to provide the insertion part 1 in a medically healthy and easy way in the prepared jawbone of a person and to fasten the insertion part to a certain extent.

For the exemplary embodiments described above, variants are possible which fall within the scope of the invention as defined in the claims. For example, fewer or more than six projections 8 may be provided.

Claims (9)

1. A dental implant system (S) comprising

An insertion part (1) of a two-part dental implant, which insertion part is of elongated shape and, viewed in the longitudinal direction, consists of two parts, on the one hand a screw part (3), which screw part (3) has an external thread (4) over at least part of its length, and on the other hand a neck part (5), which neck part (5) is located at one end of the insertion part and comprises a recess (6) in its neck end face (7), which recess (6) is suitable for fixing an abutment or a healing cap,

the neck part (5) having one or more protruding parts (8) at a distance from the end face of the neck, which protruding parts (8) are located on the circumference of the neck and extend in the radial direction,

the insert is made entirely of a material containing zirconia, an

An insertion instrument (2) for tightening the insertion part (1) of the two-part dental implant, the insertion instrument comprising a driveable elongate handle part (9), the handle part (9) terminating in a socket part (10), the socket part (10) having a socket end face extending substantially perpendicular to a longitudinal axis of the handle part,

said socket part having an opening (12), said opening (12) ending in said socket end face and at least the drive part of said opening being laterally delimited by one or more walls, said drive part (13) of said opening having a cross section at right angles to said longitudinal axis, said cross section being non-circular and having a shape and dimensions suitable for at least partially accommodating said neck part (5) of said insert part and for transferring a tightening torque applied to said handle part to said insert part (1) by means of said protruding portion (8),

it is characterized in that

The opening (12) of the insertion instrument has a bridge part (14), which bridge part (14) abuts the side of the drive part (13) facing the inside of the opening,

the bridge member surrounds the neck member (16) alongside the protruding portion (8) and extending to the neck end face, such that there is a gap between the bridge member and the neck member when the driving member of the opening surrounds the protruding portion of the neck member.

2. The dental implant system according to claim 1, wherein the gap is sized such that the gap remains unchanged until the insertion instrument is formed in an inclined position of 5 degrees relative to a longitudinal axis of the insertion member.

3. The dental implant system according to any one of the preceding claims, wherein the walls of the drive component are prismatic and the bridge component is laterally delimited by one or more walls, which are also prismatic and aligned with the walls of the drive component.

4. The dental implant system according to claim 1 or 2, wherein the bridge member widens laterally relative to the drive member in any radial direction with respect to a longitudinal axis of the insertion instrument.

5. Dental implant system according to claim 1 or 2, characterised in that the bridge part in the opening of the insertion instrument abuts the drive part in a non-staggered manner and widens gradually in the inward direction.

6. The dental implant system according to claim 1 or 2, additionally comprising an auxiliary insertion instrument for providing said insertion member, said auxiliary insertion instrument having a handle and a top member connected thereto, said top member being shaped and sized to fit tightly in a recess in said neck member of said insertion member, said top member comprising at least two legs, end portions of said legs being resiliently movable towards and away from each other.

7. The dental implant system according to claim 6, wherein said top part is made of metal.

8. An insertion instrument for tightening an insertion part of a two-part dental implant, the insertion instrument comprising an elongate handle part to be driven and terminating at a socket part having a socket end face extending substantially at right angles to a longitudinal axis of the handle part, the socket part having an opening terminating at the socket end face, the opening being laterally bounded on at least a drive part thereof by one or more walls, the drive part of the opening having a non-circular cross-section at right angles to the longitudinal axis and being shaped and sized such that the drive part is adapted to at least partially receive a neck part of the insertion part having a radial projection and to transfer a tightening torque applied to the handle part to the insertion part via the projection,

it is characterized in that the preparation method is characterized in that,

the opening of the insertion instrument has a bridge part which adjoins the side of the drive part (13) facing the inside of the opening,

the bridge member widens laterally relative to the drive member in any radial direction of the longitudinal axis relative to the longitudinal axis of the insertion instrument.

9. An insertion instrument as claimed in claim 8, wherein the bridging member of the opening abuts the drive member in a non-staggered manner and widens progressively inwardly.