OSTEOSYNTHESIS ASSEMBLY KIT AND USE OF AN ECCENTRIC CONNECTOR

Abstract

An osteosynthesis assembly kit includes a bone implant, in particular an artificial bone implant, and at least two two-part eccentric connectors.

Claims

1-15. (canceled)

16. An osteosynthesis assembly kit, comprising: a bone implant; and at least one at least two-part eccentric connector.

17. The osteosynthesis assembly kit of claim 16, wherein the at least one at least two-part eccentric connector comprises a bolt or screw for insertion into a bone, having a bolt or screw head, and an eccentric for insertion into the bone implant, wherein the eccentric has an internal helix for engagement with the bolt or screw head.

18. The osteosynthesis assembly kit of claim 16, wherein the bone implant is an artificial bone implant manufactured individually for each patient and made of a plastic, metal or ceramic.

19. The osteosynthesis assembly kit of claim 16, wherein the bone implant is a bone plate.

20. The osteosynthesis assembly kit of claim 16, wherein the bolt or screw is a screw bolt with a tool reception.

21. The osteosynthesis assembly kit of claim 16, wherein the bolt or screw or the eccentric comprises a resorbable material or of steel or titanium.

22. The osteosynthesis assembly kit of claim 16, wherein the bolt or screw, the eccentric, a cover cap for covering the tool reception, or a sleeve along the bolt has a release or active ingredient system for promoting healing or disinfection.

23. The osteosynthesis assembly kit of claim 16, wherein the bone implant has holes for accommodating eccentrics of the at least one at least two-part eccentric connector.

24. The osteosynthesis assembly kit of claim 27, wherein, in a region of the internal helix, the eccentric has one or more latching lugs configured to latch the bolt during a screwing movement.

25. The osteosynthesis assembly kit of claim 16, wherein the osteosynthesis assembly kit comprises at least three bolts or screws and three eccentrics.

26. The osteosynthesis assembly kit of claim 16, wherein the bone implant has internal bearing surfaces for pre-centering the bone implant when the bone implant is placed on the bolts or screws.

27. The osteosynthesis assembly kit of claim 16, further comprising: a drilling template configured for positioning blind holes in an edge of an opening in a skull cap; a tool for inserting the bolts or screws; or a drill.

28. The osteosynthesis assembly kit of claim 17, wherein the eccentric is detachable.

29. The osteosynthesis assembly kit of claim 16, further comprising: a casting compound with which the at least one at least two-part eccentric connector can be cast after assembly.

30. A method of using an osteosynthesis assembly kit, the method comprising: inserting an eccentric into a bone implant; inserting a bolt or screw into a skull cap; coupling the bone implant to the skull cap by inserting the bolt or screw into the eccentric and rotating the eccentric to lock the bolt or screw in the eccentric.

Description

BRIEF DESCRIPTION OF THE DRAWING FIGURES

[0028] In the following, the invention is explained in more detail by means of an exemplary embodiment with reference to the following FIGS. 1 and 2, wherein:

[0029] FIG. 1: shows an assembly system according to the invention, comprising a prefabricated skull plate and multiple eccentric connectors; and

[0030] FIG. 2: shows a known eccentric connector.

DETAILED DESCRIPTION

[0031] FIG. 1 shows an osteosynthesis with an artificial bone implant 1 in the form of a skull plate 1a. This can preferably be produced individually for each patient. This can preferably be done as follows, analogous to WO 2017 153 560 A1:

[0032] A) Collecting data from a patient for whom the skull plate is intended as a plate-shaped bone implant; The bone implant may consist of a single skull plate or two or more bone or bone fragments. The data may preferably be images from an imaging technique. Usually, these images are used for diagnostic imaging. In the present case, however, these images are taken independently of a diagnosis to create a model, or alternatively, they are used after a diagnosis has been made. Further details on preferred imaging techniques can be found in WO 2017 153 560 A1.

[0033] B) Creating a model based on the acquired data; The model can be created as a computer model.

[0034] C) Creating manufacturing specifications for at least one bone implant on the basis of the created model, wherein the manufacturing specifications comprise: C1) A dimensioning of the bone implant.

[0035] The manufacturing specifications are preferably created using the computer model in such a way that the part elements are dimensioned differently depending on their function. A bone plate is also somewhat thicker in one place than in another. The required material thickness and flexibility of the bone implant sections can be individually designed and manufactured by the model, which is based on patient-specific data.

[0036] D) Manufacturing of the bone implant based on the manufacturing specifications; wherein the partial elements can also be assembled with each other of the bone implant. The step of manufacturing partial elements can also include the adaptation of prefabricated elements, e.g., grinding down a preform based on a patient-specific manufacturing specification. The creation of manufacturing specifications for a bone implant is based on the created model, wherein the manufacturing specifications include the following additional information:

C2) A material selection regarding one or more materials for the bone implant,
This allows an optimal adjustment regarding a desired flexibility or rigidity of the partial elements.
C3) A selection of the number and/or position of eccentric connectors used for anchoring in the body.

[0037] FIG. 1 shows in addition to the skull plate an eccentric connector 2 comprising an eccentric 3 and a screw bolt 4. The eccentric 3 is designed cylindrically and has an internal helix 5 and a recess 6 for the insertion of a bolt head 10. Furthermore, the eccentric has a tool reception 7, e.g., a slotted reception, a cross slotted reception and/or a hexagonal reception or similar, in which a tool can engage.

[0038] By turning the eccentric 3, e.g. by 90°, 180° or more, the bolt head 10 is brought into engagement with the internal helix 5.

[0039] The internal helix 5 is designed as a double spiral in FIGS. 1 and 2, but it can also be a single spiral.

[0040] In FIG. 2, the screw bolt 4 has a screw segment 8, a bolt shaft 9, and a terminal bolt head 10.

[0041] The skull plate 1a has holes 14 to accommodate the eccentrics 3, such that the tool reception located in the eccentric 3 is accessible from the outside, i.e., from the outside of the skull cap 12.

[0042] When assembling the skull cap, blind holes 13 are first drilled into the edge of the opening 11 of the skull cap 12. The edge of opening 11 can also be pretreated to avoid undercuts, sharp corners and the like.

[0043] Then the screw bolts are inserted into the blind holes 13 in such a way that the bolt shafts 9 and the bolt heads 10 protrude radially inwards into the opening 11 of the skull cap 12.

[0044] The skull plate is then placed on the bolt shafts 9 and bolt heads 10. While in the furniture application area the furniture walls are often plugged together, in this case only the skull plate is intended to be positioned or placed, as there is no more space available. However, it is also possible to mount the skull plate on one side only, e.g., on two bolts, so that it is only placed on the other two bolts.

[0045] Furthermore, the eccentrics 3 are inserted into the holes 14 and twisted so that the internal helix 5 engages with the respective bolt head.

[0046] Finally, a cover cap (not shown) can be placed on top of the eccentric, which prevents deposits in the tool reception.

[0047] In a preferred embodiment variant, the internal helix 5 can have one or more latching lugs, as an anti-twist device for the eccentric 3.

[0048] The material of the screw bolts 4 and/or the eccentric 3 can be a metal, preferably steel, especially stainless steel, or titanium.

[0049] Alternatively, the screw bolt 4 and/or the eccentric 3 can also be made of plastic, e.g., PEEK, and in particular of a resorbable plastic, e.g., PLA. Screw bolt 4 and/or the eccentric 3 or other components such as a cover cap or a casting compound can also be made of magnesium or magnesium oxide or hydroxyapatite.

[0050] The bolt shaft 9 may have an external sleeve. This sleeve or the cover cap may be made of a resorbable plastic material, which is equipped with a release and/or active ingredient system, in particular coated or integrated. The term active ingredients or active ingredient systems refers to medicinal products. These can be e.g., antibiotics, immunosuppressants, growth hormones, or cytostatics. Release systems include all substances that are typically added to the drug, for example to control the release of the drug in the body with regard to the time and place of delivery or to preserve the drug under different conditions. Typical substances are e.g., tocopherol, which is often added as an antioxidant, or polysaccharides, e.g., chitin, for the microencapsulation of a corresponding drug. The choice of the release system also depends, among other things, on the choice of the material, i.e., the base material, from which the sleeve or cap is to be made. The eccentric 3 and/or the screw bolt 4 can also have such a drug and/or release system.

[0051] The blind holes 13 can preferably be drilled at a slight angle to allow better access to the bolts.

[0052] FIG. 2 again shows the eccentric connectors 2 in detail.

[0053] For a better fixing of the screws a hose, e.g., a steel hose with a bit, can be attached to a tool.

[0054] In the context of the present invention, screw bolts do not necessarily have to be used for the eccentric connector. Socket pins or a screw are also conceivable, for example.

[0055] On the opposite side of the bone plate, i.e., on the inside, a prefabricated bearing surface can be arranged in the contour of the screw bolt, which allows pre-centering of the bone plate when it is placed on the screw bolts.

[0056] For the positioning of the blind holes 13, a drilling aid, such as a drilling template, can also be provided in an assembly kit in addition to the skull plate and the several two-part eccentric connectors.

[0057] A tool for inserting the bolts 4 and/or a drill for the blind holes 13 can also be supplied in the assembly kit.

[0058] Although the invention has been illustrated and described in detail by way of preferred embodiments, the invention is not limited by the examples disclosed, and other variations can be derived from these by the person skilled in the art without leaving the scope of the invention. It is therefore clear that there is a plurality of possible variations. It is also clear that embodiments stated by way of example are only really examples that are not to be seen as limiting the scope, application possibilities or configuration of the invention in any way. In fact, the preceding description and the description of the figures enable the person skilled in the art to implement the exemplary embodiments in concrete manner, wherein, with the knowledge of the disclosed inventive concept, the person skilled in the art is able to undertake various changes, for example, with regard to the functioning or arrangement of individual elements stated in an exemplary embodiment without leaving the scope of the invention, which is defined by the claims and their legal equivalents, such as further explanations in the description.

REFERENCE NUMERALS

[0059] 1 Bone implant [0060] 2 Eccentric connector [0061] 3 Eccentric [0062] 4 Screw bolts [0063] 5 Internal helix [0064] 6 Recess [0065] 7 Tool reception [0066] 8 Screw segment [0067] 9 Bolt shaft [0068] 10 Bolt head [0069] 11 Opening [0070] 12 Skull cap [0071] 13 Blind hole [0072] 14 Holes