A method of cranioplasty

Abstract

The application discloses a skull repair fixing method, which comprises a drilling fixing part and a connecting part; the drilling fixing part comprises a drilling expansion fixing part; the drilling expansion fixing part is annular with an opening; the center position of the drilling expansion fixing part is a conical screw hole; two sides of the opening of the drilling expansion fixing part are respectively provided with bone flap fixing parts; after the drilling expansion fixing part is placed into a drilling hole on a skull, a screw is screwed into the conical screw hole, and the drilling expansion fixing part is clamped in the drilling hole after expansion; the two ends of the connecting part are respectively provided with a clamping groove for clamping a bone flap and a clamping groove for clamping a skull. The skull repair fixing method is simple in operation, does not need metal nail fixing, and has no additional protruding part on the skull, so that the mental state of a patient after operation is better.

Description

TECHNICAL FIELD

[0001] The application relates to a skull repair fixing method and belongs to the medical instrument field. BACKGROUND

[0002] Skull repair surgery has a great influence on the psychology, spirit and rehabilitation of patients in realizing the organic unity of structure restoration, function perfection and appearance beauty.

[0003] Currently, titanium mesh and PEEK are mainly used in clinical use, and other skull repair materials such as organic glass and bone cement have not been used in clinical use. Compared with a three-dimensional titanium plate, the PEEK skull repair material has obvious advantages. The full name of PEEK material is polyether ether ketone material, which is a new type of skull repair material that has become popular in recent years. That is, the PEEK implant is used to fill the skull defect. It makes up for the shortcomings of the titanium mesh material and brings very good repair effect. In the operation, the PEEK material adopts an embedded repair method and is often fixed by using a connecting piece and a titanium nail made of PEEK material. Although it will not cause cutting damage like the titanium mesh material covering repair, due to design reasons, the PEEK repair piece and the connecting piece will have a protruding part on the skull, especially the part fixed by the titanium nail, which will be particularly protruding. The titanium nail will alarm during security check, which brings inconvenience to the patient. Clinically, a skull repair method without metal components and protrusions is needed to fix the work after the skull repair surgery. SUMMARY

[0004] The purpose of the present application is to provide a new skull repair fixing method during the skull repair surgery, which uses a fixed skull piece mode and has the problems of not containing metal materials and not protruding on the skull.

[0005] Although the personnel in the field have been eager to solve the problems of the protrusion of the titanium nail after the skull repair surgery and the inconvenience of the patient caused by the metal components, compared with the traditional connecting piece and screw scheme, there is objective technical inertia in the field, so that the technical personnel in the field cannot successfully solve the above-mentioned problems. That is, the solutions and technical concepts tried by the technical personnel in the field in the prior art are to reduce the thickness of the connecting piece and the screw to reduce the overall protruding thickness. However, the technical scheme of the present application is quite different from the prior art concept. The scheme of the present application draws lessons from the mortise and tenon structure, which is very common in architecture, but is relatively rare in the medical instrument industry for repairing the skull. The skull repair fixing method provided by the present application combines the drill hole formed in the operation process and the drill hole fixing piece and the connecting piece designed by the mortise and tenon structure, and forms the tension of the mortise and tenon and the mortise structure, so as to fix the cut bone plate on the skull, so as to avoid the protrusion between the skull and the scalp and the metal material after the skull repair is completed.

[0006] The application adopts the following technical scheme:

[0007] A skull repair fixing method uses a drill hole fixing piece and a connecting piece; the drill hole fixing piece comprises a drill hole expansion fixing part; the drill hole expansion fixing part is annular with an opening; the central position of the drill hole expansion fixing part is a tapered screw hole;

[0008] Both sides of the opening of the drill hole expansion fixing part are respectively provided with a bone flap fixing part;

[0009] After the drill hole expansion fixing part is put into a drill hole on the skull, a screw is screwed into the tapered screw hole, and the drill hole expansion fixing part is clamped in the drill hole after expansion;

[0010] Optionally, the outer side surface of the drill hole expansion fixing part is a contact surface with the drill hole;

[0011] Both ends of the connecting piece are respectively provided with a clamping groove for clamping the bone flap and a clamping groove for clamping the skull;

[0012] The skull repair fixing method comprises the following steps:

[0013] Step 1) The bone flap is trimmed, and the drill hole fixing piece is connected to the bone flap through the bone flap fixing part, so that the position of the drill hole expansion fixing part corresponds to the position of the drill hole on the skull;

[0014] Step 2) The bone flap is reset, the connecting piece is placed to connect the skull and the bone flap, and the drill hole fixing piece is placed in a drill hole, so that the drill hole expansion fixing part enters the drill hole on the skull;

[0015] Step 3) A screw is screwed into the tapered screw hole, and the drill hole expansion fixing part is clamped in the drill hole after expansion.

[0016] Optionally, the drill hole fixing piece, the connecting piece and the screw are all made of polyether ether ketone material.

[0017] Optionally, the bone flap fixing part is provided with a groove for accommodating the bone flap.

[0018] Optionally, the bone flap fixing part is further provided with a groove for accommodating the skull.

[0019] The connecting piece is an I-shaped piece comprising a connecting rod, the connecting rod is respectively provided with an upper clamping piece and a lower clamping piece, and the upper clamping piece and the lower clamping piece form a clamping groove for clamping the bone flap and a clamping groove for clamping the skull.

[0020] Optionally, the width of the connecting piece is consistent with the gap width between the skull and the bone flap.

[0021] Optionally, the placing the connecting member to connect the skull and the bone flap comprises: extending the lower card of the connecting member into the bottom of the skull and the bone flap along the gap between the skull and the bone flap.

[0022] Optionally, the placing the connecting member to connect the skull and the bone flap further comprises: applying upward force to the two ends of the upper card to expand the two card slots and rotate the connecting member; and then releasing the upper card, the upper card and the lower card cooperate to clamp the skull and the bone flap.

[0023] Optionally, the thickness of the upper card and the lower card is 0.8-1.0mm.

[0024] The application can produce beneficial effects, including:

[0025] The application is simple to use, does not need metal nails for fixation, and has no additional protruding parts on the skull, which can make the patient's mental state better after the operation. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the skull and the bone flap to be fixed;

[0027] Figure 2 is a top view of the drill hole fixing member;

[0028] Figure 3 is a vertical cross-sectional view of the drill hole expansion fixing part A-A;

[0029] Figure 4 is a cross-sectional view of the bone flap fixing part;

[0030] Figure 5 is a schematic diagram of the installation effect of the skull repair and fixation method;

[0031] Figure 6 is a side view of the connecting member. DETAILED DESCRIPTION

[0032] The application will be described in detail below in conjunction with the embodiments, but the application is not limited to these embodiments.

[0033] Example 1

[0034] During the craniotomy operation, three drill holes are first drilled, and then a milling cutter is used for cutting, and the skull 1 and the bone flap 2 to be fixed have shapes as shown in Figure 1 The skull repair and fixation method in this embodiment uses a drill hole fixing member 3 and a plurality of connecting members 5 for fixation. The drill hole fixing member comprises a drill hole expansion fixing part 31; the drill hole expansion fixing part 31 is annular with an opening. As shown in Figure 2 and Figure 3 the center of the drill hole expansion fixing part 31 is a conical screw hole 311, and the outer side surface 312 of the drill hole expansion fixing part 31 is a contact surface with the drill hole, Figure 3Fig. 2 is a cross-sectional view of the center position A-A of the hole expansion fixing part 31 perpendicular to the annular center. The hole expansion fixing part 31 is provided with a rod-shaped bone flap fixing part 32 on both sides of the hole expansion fixing part 31 opening. The bone flap fixing part 32 is provided with a groove 322 for accommodating the bone flap and a groove 321 for accommodating the skull on both sides of the bone flap fixing part 32. When the hole expansion fixing part 31 is placed in the hole on the skull, the screw 4 is screwed into the tapered screw hole, and the hole expansion fixing part 31 is expanded and clamped in the hole.

[0035] The hole fixing part 3 and the screw 4 are made of polyether ether ketone material.

[0036] The connecting part 5 is in the shape of an I-beam. The connecting part 5 is provided with a clamping groove 51 for clamping the bone flap and a clamping groove 52 for clamping the skull on both ends of the connecting part 5. The clamping grooves are formed by upper and lower clamping pieces provided on the connecting rod. The connecting part 5 is also made of polyether ether ketone material.

[0037] The skull repair and fixation method comprises the following steps:

[0038] Step 1) The bone flap is trimmed, and the hole fixing part is connected to the bone flap through the bone flap fixing part, so that the position of the hole expansion fixing part corresponds to the position of the hole on the skull.

[0039] Step 2) The bone flap is reset, and the connecting part is placed to connect the skull and the bone flap. Since the width of the connecting part is consistent with the width of the gap between the skull and the bone flap, the lower clamping piece of the connecting part can be inserted into the bottom of the skull and the bone flap along the gap between the skull and the bone flap. Then, upward force is applied to both ends of the upper clamping piece to slightly expand the two clamping grooves, and the clamping buckle is rotated about 90° to release the upper clamping piece. The upper and lower clamping pieces cooperate to clamp the skull and the bone flap, and the thickness of the upper and lower clamping pieces is 1.0 mm.

[0040] Then, the hole fixing part is placed in a hole, and the hole expansion fixing part is inserted into the hole on the skull.

[0041] Step 3) The screw is screwed into the tapered screw hole, and the hole expansion fixing part is expanded and clamped in the hole, as shown in Fig. 3. Figure 5

[0042] The above description is only a few embodiments of the present application, and does not limit the present application in any form. Although the preferred embodiments are disclosed as above, they are not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, which are equivalent to equivalent embodiments and belong to the scope of the technical solution.​

Claims

1. A device for skull repair and fixation, characterized in that, Includes drilling fixtures and connectors; The drilling fixation component includes a drilling expansion fixation part; the drilling expansion fixation part is an annular shape with an opening; the center of the drilling expansion fixation part is a conical screw hole; bone flap fixation parts are respectively provided on both sides of the opening of the drilling expansion fixation part; after the drilling expansion fixation part is placed into the drill hole on the bone flap, the screw is screwed into the conical screw hole, and the drilling expansion fixation part expands and gets stuck in the drill hole. The bone flap fixing part is provided with a groove for accommodating the bone flap; The bone flap fixation part is also provided with a groove for accommodating the skull; The connector has a slot at each end for securing the bone flap and a slot for securing the skull; the connector is made of polyetheretherketone material. The connector is I-shaped and includes a connecting rod. The connecting rod is provided with an upper clip and a lower clip. The upper clip and the lower clip form a slot for locking the bone flap and a slot for locking the skull. When an upward force is applied to both ends of the upper clip, the two slots can be enlarged. The thickness of the upper clip and the lower clip is 0.8~1.0mm. The width of the connector is the same as the width of the gap between the skull and the bone flap.

2. The apparatus according to claim 1, characterized in that, The drilling fixture and screws are both made of polyetheretherketone (PEEK).

3. The apparatus according to claim 1, wherein the apparatus for cranioplasty fixation is configured to perform cranioplasty fixation via a cranioplasty fixation method comprising the following steps: Step 1) Trim the bone flap and connect the drilled fixation piece to the bone flap through the bone flap fixation part, so that the position of the drilled expansion fixation part corresponds to the position of the drill hole on the skull. Step 2) First, place the connector to connect the bone flap; then place the drill fixation component in a drill hole so that the drill expansion fixation part enters the drill hole on the bone flap. Step 3) Screw the screw into the tapered screw hole. After the drill hole expansion fixing part expands, it will be stuck in the drill hole.

4. The apparatus according to claim 3, characterized in that, The placement of the connector to connect the skull and bone flap includes: inserting the lower clip of the connector into the bottom of the skull and bone flap along the gap between them.

5. The apparatus according to claim 4, characterized in that, The placement of the connector to connect the skull and bone flap also includes: applying an upward force to both ends of the upper card to expand the two slots, while rotating the connector; then releasing the upper card, and the upper and lower cards cooperate to lock the skull and bone flap.

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