Implant for bone distraction

Abstract

An implant includes an implant body and a distraction membrane. The distraction membrane is connected to the implant by a connection element. The connection element is arranged movably at least over a portion of a longitudinal axis of the implant body such that the distraction membrane is slidable along at least a portion of the longitudinal axis of the implant body.

Claims

1. An implant comprising: an implant body; and a distraction membrane, wherein the distraction membrane is connected to the implant body by a connection element, the connection element arranged movably at least over a portion of a longitudinal axis of the implant body such that the distraction membrane is slidable along at least a portion of the longitudinal axis of the implant body.

2. The implant according to claim 1, wherein an apical region of the implant body has a thread for screwing the implant body into a bone.

3. The implant according to claim 1, wherein the implant is a tooth implant.

4. The implant according to claim 3, wherein the tooth implant is a temporary implant, preferably a thread cutter.

5. The implant according to claim 1, wherein the distraction membrane has a hole through which the implant body extends.

6. The according to claim 1, wherein the connection element comprises a self-locking transmission for moving the distraction membrane along the longitudinal axis of the implant body.

7. The implant according to claim 5, wherein the hole in the distraction membrane has an internal thread and the connection element has an external thread, wherein the external thread of the connection element can be screwed into the internal thread of the distraction membrane.

8. The implant according to claim 5, wherein the distraction membrane is connected to the connection element by an interconnection selected from a group consisting of a tongue and groove connection and a click connection.

9. The implant according to claim 1, wherein the connection element has a spacer sleeve.

10. The implant according to claim 1, wherein the implant body, along the longitudinal axis, has a lower portion with a thread, and a second portion above the lower portion, wherein the second portion is designed as a toothed rack.

11. The implant according to claim 10, wherein the connection element has a housing with a passage and a threaded body, wherein the toothed rack is inserted in longitudinal extension through the passage essentially without play through the housing, and wherein the threaded body is rotatably mounted in the housing such that the threaded body and the toothed rack are in active mesh.

12. The implant according to claim 11, wherein the housing is designed as a spacer sleeve.

13. The implant according to claim 12, wherein the connection element has a spacer sleeve and a housing, wherein the housing has an external thread on one end, and wherein the spacer sleeve is, at least to some extent, conical, and wherein the spacer sleeve has, on the first end with the smaller diameter, an external thread for screwing into the internal thread of the membrane, and wherein the spacer sleeve, on the second end that is opposite the first end, has an internal thread, into which the external thread of the housing can be screwed.

14. The implant according to claim 9, wherein the connection element is designed as a spacer sleeve, and wherein the membrane is attached to a surface of the spacer sleeve.

15. The implant according to claim 9, wherein the connection element is designed as a spacer sleeve, and wherein the membrane is formed by a surface of the spacer sleeve.

16. The implant according to claim 1, further comprising a crown.

17. The implant according to claim 1, wherein the implant body is made of a resorbable material, zircon, or a metal.

18. The implant according to claim 1, wherein the distraction membrane is curved.

19. The implant according to claim 1, wherein the distraction member includes an upper surface directly attached to the connection element and the distraction membrane radially extends out from the implant body beyond the connection element.

20. An implant comprising: an implant body extending in a longitudinal direction; a connection element circumferentially surrounding the implant body and linearly movable along the implant body; an adjustment member circumferentially surrounding the implant body and rotatable relative to the implant body; and a distraction membrane, the distraction member including an upper surface directly attached to the connection element and the distraction membrane radially extending out from the implant body beyond the connection element, wherein the distraction membrane and the connection element are collectively movable along at least a portion of the longitudinal axis of the implant body.

Description

BEST DESCRIPTION OF THE DRAWINGS

(1) In the following, the invention is explained in more detail using the drawings.

(2) FIG. 1 shows the cross-section of a preferred embodiment of an implant according to the invention;

(3) FIG. 2 shows a side view and a top view of the embodiment according to the invention from FIG. 1;

(4) FIG. 3 shows the embodiment from FIG. 1 with connected and not yet connected membrane;

(5) FIG. 4 shows a side view and cross-section of an alternative embodiment of the implant according to the invention;

(6) FIG. 5 shows a further alternative embodiment of the implant according to the invention in an assembled state and as individual parts;

(7) FIG. 6 shows the alternative embodiment of the implant according to the invention from FIG. 5 during a distraction in the jaw region.

(8) FIG. 7 shows a further alternative embodiment of the implant according to the invention.

DETAILED DESCRIPTION

(9) Naturally, preferred details of the embodiments shown in FIGS. 1 to 7 can also be combined.

(10) FIG. 1 shows the cross-section of a preferred embodiment of an implant (100) according to the invention. The implant (100) comprises an implant body (10), a distraction membrane (20), and a connection element (30).

(11) The apical region (11) of the implant body (10) has a thread for screwing or boring the implant body (10) into a bone. The coronal section (12) of the implant body (10) is designed as toothed rack. The implant body (10) has a hole (14), over which a crown (13) can be attached.

(12) The distraction membrane (20) has a contact surface (21) and a counterface (22). The contact surface (21) is preferably formed by a coating, for example, made of a mineral material.

(13) The distraction membrane (20) is connected to the implant body (10) by means of the connection element (30) such that the membrane (20) can be moved or shifted along the implant body (10). The connection element (30) has a to some extent conical spacer sleeve (32). The membrane (20) is engaged, screwed, or glued into said spacer sleeve (32). An adjusting nut (37), having an interior thread, is rotatably mounted in the spacer sleeve (32). By rotating the adjusting nut (37), the spacer sleeve (32) and thus also the membrane (20) can be shifted along the implant body (10). The adjusting nut (37) is thus a rotatably mounted threaded body which is in active mesh with the toothed rack of the coronal section (12) of the implant body (10).

(14) FIG. 2 shows a side view (A) and a top view (B) of the implant (100) according to the invention from FIG. 1.

(15) It again shows the implant body (10) with apical region (11) and coronal section (12) and hole (14) for attaching a crown, the distraction membrane (20) with contact surface (21) and counterface (22), and the connection element (30) with spacer sleeve (32) and adjusting nut (37).

(16) The membrane has interconnecting perforations or pores (23) which allow for a material and blood exchange between the tissue bearing against the contact surface (21) and the tissue bearing against the counterface (22). The implant body (10) is guided through a hole (25) in the membrane (20).

(17) The adjusting nut (37) has a plurality of points of application (38) for a tool, and so the adjusting nut can be rotated in a simple manner and thus be moved with its internal thread along the toothed rack.

(18) FIG. 3 shows the implant (100) according to the invention from FIG. 1 with connected membrane (A) and not yet connected membrane (B).

(19) It again shows the implant body (10) with apical region (11) and coronal section (12) with toothed rack and hole (14) for attaching a crown, the distraction membrane (20) with contact surface (21), counterface (22), and interconnecting perforations or pores (23), and the connection element (30) with spacer sleeve (32), and adjusting nut (37) with a plurality of points of application (38).

(20) In FIG. 3B, the membrane is not yet connected to the spacer sleeve (32). For attaching the membrane (20), the implant body (10) can be guided through the hole (25) in the membrane (20). Then, the membrane (20) with the ring (26), which for example can be designed as a groove of a tongue and groove connection or as a snap-in element, can be clicked in or engaged in the spacer sleeve (32), wherein the implant body (10) is already guided through a hole (35) in the spacer sleeve (32).

(21) FIG. 4 shows a side view (A) and a cross-section (B) of an alternative embodiment of the implant (100) according to the invention.

(22) It again shows the implant body (10) with apical region (11) and coronal section (12) with toothed rack and hole (14) for attaching a crown, the distraction membrane (20) with contact surface (21), counterface (22), and interconnecting perforations or pores (23), and the connection element (30) with spacer sleeve (32).

(23) In this case, the connection element (30) is designed such that the spacer sleeve (32) forms a housing of a worm gear, in which a threaded body in the form of a worm (33) is rotatably mounted in the spacer sleeve (32) such that the worm (33) and the toothed rack (12) are in active mesh. The rotatory movement of the worm (33) can therefore be transformed into a translational motion of the connection element (30) and thus of the membrane (20) on the toothed rack (12). The worm (33) has a point of application (34) for a tool, for example an Allen wrench, and so the worm (33) can be easily rotated.

(24) FIG. 5 shows a further alternative embodiment of the implant (100) according to the invention in an assembled state (A) and as individual parts (B).

(25) It again shows the implant body (10) with apical region (11) and coronal section (12) with toothed rack, the distraction membrane (20) with contact surface (21), counterface (22), and interconnecting perforations or pores (23), and the connection element (30).

(26) In this embodiment, the spacer sleeve (32) is screw-connected with (A) or screw-mountable (B) to an external thread (36) of the connection element (30) by means of an internal thread. The membrane is screw-connected with (A) or screw-mountable (B) to an external thread (35) of the spacer sleeve (32) by means of an internal thread in its hole (25).

(27) The connection element (30) is designed such that in the housing (31), a threaded body in the form of a worm (33) in rotatably mounted in the housing (31) such that the worm (33) and the toothed rack (12) are in active mesh. The rotatory movement of the worm (33) can therefore be transformed into a translational motion of the connection element (30) and thus of the membrane (20) on the toothed rack (12). The worm (33) has a point of application (34) for a tool, for example an Allen wrench, and so the worm (33) can be easily rotated.

(28) FIG. 6 shows the alternative embodiment of the implant (100) according to the invention from FIG. 5 during a distraction in the jaw region (50).

(29) It again shows the implant body (10) with apical region (11) and coronal section (12) with toothed rack, the distraction membrane (20) with contact surface (21), counterface (22), and interconnecting perforations or pores (23), and the connection element (30) with spacer sleeve (32), housing (31), worm (33), and point of application (34). The membrane (20) is screw-connected to an external thread (35) of the spacer sleeve (32) by means of an internal thread in its hole (25).

(30) Furthermore, a jaw bone (51) with two teeth (52) is shown.

(31) The jaw bone (51) has a bone defect, into which the apical part (11) of the implant body (10) is screwed.

(32) With this structure, a method for bone build-up according to the invention is possible.

(33) The membrane (20) is removed from the bone defect at a speed from 0.2 to 2.5 mm per day by means of the connection element (30) by turning the worm (33) daily or every half-day by means of a tool which applies to the point of application (34).

(34) This results in distraction pulses in the tissue (54), particularly callus, which bears against the contact surface (21), said pulses triggering a bone formation. Connective tissue (53) lies above the membrane (20).

(35) Due to the interconnecting perforations or pores (23) of the membrane (20), a material and blood exchange between the tissue (54) which bears against the contact surface (21) and the tissue (53) which bears against the counterface (22) is possible.

(36) FIG. 7 shows a further alternative embodiment of an implant (100) according to the invention.

(37) It again shows the implant body (10) with apical region (11) and coronal section (12) with toothed rack and hole (14) with a crown (13) attached to it.

(38) In this embodiment, the distraction membrane (20) is directly attached with its counterface to the connection element (30) which is designed as a conical spacer sleeve (32). Alternatively, the base surface of the conical spacer sleeve (32) can also be designed as membrane. The contact surface (21) is formed by a layer made from a mineral material.

(39) The connection element (30) with spacer sleeve (32) is again moved along the implant body by means of a rotatably mounted threaded body which is designed as adjusting nut (37).

(40) The size of the base surface of the conical spacer sleeve (32) can advantageously be adjusted by means of the angle (39), and so different spacer sleeves (32) with different base surface size can be used which, however, have the same height and thus correspond in their dimensioning to the length of the implant body (10).

(41) In this case, the membrane (20) is designed so as to be bioresorbable. The membrane (20) can be connected to the spacer sleeve (32) by means of a clamping fit since the cone of the spacer sleeve increases in the direction of the tip (11) of the implant body (10). The completion of the distraction, i.e. after a relatively short period of weeks, is followed by the consolidation period, i.e. a relatively long period of months, during which the bioresorbable membrane, due to progressive resorption, particularly on the edges of the membrane, is no longer held by the conical spacer sleeve, and the spacer sleeve can be removed without problems.