A universal lumbosacral iliac reconstruction prosthesis

Abstract

The application discloses a general sacrolumbar reconstruction prosthesis, which comprises a sacrum supporting pad block in a triangular shape, a sacrum connecting surface, an ilium connecting surface and an inner side surface, the sacrum connecting surface is located at the upper part and abuts against the retained sacrum, the ilium connecting surface is located at the outer side surface and abuts against the ilium, and the inner side surface connects the sacrum connecting surface and the ilium connecting surface, the sacrum connecting surface and the ilium connecting surface are provided with porous trabecula biomimetic interfaces, and the sacrum supporting pad block is used alone or in pairs. The application is used for sacrum tumor resection after the sacrum tumor resection involving S1 nerve hole, sacrum defect and sacroiliac joint reconstruction, unilateral reconstruction can be carried out according to the resection range of the sacrum, the unilateral healthy sacrum is as far as possible to be retained, and bilateral reconstruction can be carried out in pairs, a spine nail and rod system is avoided, the lumbar vertebra activity is retained, the sacroiliac joint mechanics transmission is met, and postoperative sacrum vertebral fracture is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical prostheses, in particular to a general sacrolumbar-iliac reconstruction prosthesis. BACKGROUND

[0002] The sacrum connects the lumbar vertebrae to form the sacrolumbar joint and connects the ilium of the pelvis to form the sacroiliac joint, one of which connects the spine and the other of which connects the pelvis, and the body force is transmitted and supported.

[0003] Surgical treatment of sacral malignant tumors generally has relatively good therapeutic effect, and usually requires resection of all or part of the sacrum, because the sacrum plays an important supporting role, and after resection, the supporting strength is not enough, especially after sacral resection involving the S1 nerve foramen (the sacral pelvic surface has two rows of sacral anterior foramina on both sides of the median line, each side has 4, from top to bottom, they are S1, 2, 3, 4 nerve foramina), usually choose bilateral lumbar sacroiliac screw fixation reconstruction, lumbar sacroiliac screw is also called spinal screw rod system, which connects the spine, sacrum and ilium through pedicle screw and screw rod, and directly transfers the stress of the spine to the ilium, which usually sacrifices the mobility of the lumbar vertebrae and also causes damage to part of the normal ilium. With the increasing maturity of 3D printing technology, the customized characteristics of 3D printing are increasingly widely used in medical prostheses. When sacrolumbar-iliac reconstruction is performed, the sacral prosthesis can be customized according to the resection range of the patient, but the prosthesis customization design and printing cycle is long and expensive, increasing the patient's medical waiting and cost. SUMMARY

[0004] To solve the above problems in the prior art, the present application provides a general sacrolumbar-iliac reconstruction prosthesis for sacral tumor resection involving the S1 nerve foramen, bone defect and sacroiliac joint reconstruction after resection, unilateral or bilateral reconstruction according to the resection range of the sacrum, and meets the needs of various sacral resection conditions.

[0005] To achieve the above technical purposes, the technical scheme adopted by the present application is:

[0006] A general sacrolumbar-iliac reconstruction prosthesis, comprising a sacral support pad, the sacral support pad is in a triangular shape, comprising a sacral connecting surface, an iliac connecting surface and an inner side surface, the sacral connecting surface is located at the upper part and abuts against the retained sacrum, the iliac connecting surface is located at the outer side surface and abuts against the ilium, and the inner side surface connects the sacral connecting surface and the iliac connecting surface; the sacral connecting surface and the iliac connecting surface are provided with a porous trabecular biomimetic interface; the sacral support pad is used alone or in pairs.

[0007] Further, the sacrum connecting surface of the sacrum support pad block comprises at least three shapes.

[0008] Preferably, the sacrum support pad block comprises a sacrum support pad block A, and the sacrum connecting surface of the sacrum support pad block A is flat, which is used for adapting to the resection case of retaining the complete shape of the S1 nerve foramen.

[0009] Preferably, the sacrum support pad block comprises a sacrum support pad block B, and the sacrum connecting surface of the sacrum support pad block B is provided with a semicircular nerve passage corresponding to the position of the S1 nerve foramen, which is used for adapting to the case of resection along the middle of the S1 nerve foramen.

[0010] Preferably, the sacrum support pad block comprises a sacrum support pad block C, and the sacrum connecting surface of the sacrum support pad block C is provided with a U-shaped nerve passage, which is used for adapting to the case of complete resection of the S1 nerve foramen.

[0011] Further, the sacrum support pad block is provided with a first countersunk screw hole penetrating through the inner side surface and the sacrum connecting surface, which is used for the bone screw to pass through the connection of the sacrum of the patient; and the sacrum support pad block is provided with a second countersunk screw hole penetrating through the inner side surface and the ilium connecting surface, which is used for the bone screw to pass through the connection of the ilium of the patient.

[0012] Preferably, the sacrum support pad block is made of titanium alloy material.

[0013] Compared with the prior art, the sacrum support pad block has the following beneficial effects:

[0014] The sacrum support pad block is used for the bone defect and sacroiliac joint reconstruction after the resection of the sacrum tumor involving the S1 nerve foramen, can be used for unilateral reconstruction according to the resection range of the sacrum, can retain the unilateral healthy sacrum as much as possible, can also be used for bilateral reconstruction, avoids using the spine nail rod system, retains the lumbar activity, conforms to the mechanics transmission of the sacroiliac joint, and prevents the postoperative sacrum vertebral fracture.

[0015] The sacrum support pad block in the application is provided with multiple shapes, can meet the needs of multiple resection cases of the sacrum, protects the sacrum nerve, and retains the lumbar activity. Different shapes and sizes of the pad block can be mass-produced in a modular way, which shortens the waiting time of the operation and is simple to operate in the operation. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 is a schematic diagram of the embodiment of the present applicationFigure 1 ;

[0018] Figure 2 is a schematic view of a sacral support pad of an embodiment of the present application;

[0019] Figure 3 is a schematic view of an application of Figure 2 ;

[0020] Figure 4 is a schematic view of a sacral support pad of a second embodiment of the present application;

[0021] Figure 5 is a schematic view of an application of Figure 4 ;

[0022] Figure 6 is a schematic view of a sacral support pad of a third embodiment of the present application;

[0023] Figure 7 is a schematic view of an application of Figure 6 .

[0024] Reference signs: 1 - sacral support pad, 11 - sacral connecting surface, 12 - iliac connecting surface, 13 - medial surface, 14 - nerve passage, 15 - first counterbore, 16 - second counterbore, 2 - sacrum, 21 - S1 nerve foramen, 3 - ilium. DETAILED DESCRIPTION

[0025] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0026] A universal lumbosacral reconstruction prosthesis, such as Figures 1-7As shown, it comprises a sacrum support pad 1 in triangular shape, including a sacrum connecting surface 11, an ilium connecting surface 12 and an inner side surface 13, the sacrum connecting surface 11 is located at the upper part and abuts against the retained sacrum 2, the ilium connecting surface 13 is located at the outer side surface and abuts against the ilium 3, and the inner side surface 13 connects the sacrum connecting surface 11 and the ilium connecting surface 12; the sacrum support pad 1 is made of titanium alloy material, and the sacrum connecting surface 11 and the ilium connecting surface 12 are provided with a porous trabecular biomimetic interface to promote bone growth and integration and improve long-term stability. According to the resection range of the sacrum 2 of the patient (unilateral or bilateral), the sacrum support pad 1 is used alone or in pairs, and when used in pairs, two sacrum support pads 1 are symmetrically laid out.

[0027] According to different height positions of the sacrum 2 resection, the sacrum connecting surface 11 of the sacrum support pad 1 is provided with multiple shapes. Specifically, the sacrum connecting surface 11 has at least three shapes. The sacrum connecting surface 11 of the sacrum support pad A is in a planar shape, which is used to adapt to the case of retaining the complete shape of the S1 nerve foramen 21 (resected along the lower edge of the S1 nerve foramen), as shown in FIG. 3; the sacrum connecting surface 11 of the sacrum support pad B is provided with a semicircular nerve passage 14 corresponding to the position of the S1 nerve foramen 21, which is used to adapt to the case of resection along the middle of the S1 nerve foramen, as shown in FIG. 4; the sacrum connecting surface 11 of the sacrum support pad C is provided with a U-shaped nerve passage 14, which is used to adapt to the case of complete resection of the S1 nerve foramen 21 (resected along the upper edge of the S1 nerve foramen), as shown in FIG. 5; and the sacrum nerve can be completely placed in the nerve passage, and the retained sacrum nerve can retain part of the function of the patient and reduce irreversible damage. Figure 2 Figure 4 、 Figure 5 Figure 6 、 Figure 7

[0028] The sacrum support pad is provided with a first countersunk screw hole 15 penetrating through the inner side surface 13 and the sacrum connecting surface 11, which is used for the bone screw to pass through and connect the retained sacrum 2 of the patient; and the sacrum support pad is provided with a second countersunk screw hole 16 penetrating through the inner side surface 13 and the ilium connecting surface 12, which is used for the bone screw to pass through and connect the ilium 3 of the patient.

[0029] Of course, the present application can have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application, but these corresponding changes and modifications shall belong to the protection scope of the claims attached to the present application.​​​

Claims

1. A universal lumbar sacroiliac reconstruction prosthesis, comprising a sacral support pad (1), characterized in that: The sacral support pad (1) is triangular in shape, comprising a sacral connection surface (11), an iliac connection surface (12) and an inner side surface (13), wherein the sacral connection surface (11) is located at the upper part and abuts against the retained sacrum (2), the iliac connection surface (12) is located at the outer side and abuts against the ilium (3), and the inner side surface (13) connects the sacral connection surface (11) and the iliac connection surface (12); the sacral connection surface (11) and the iliac connection surface (12) are provided with a porous trabecular bionic interface; the sacral support pad (1) is used alone or in pairs; the sacral connection surface (11) of the sacral support pad (1) includes at least three forms; The sacral support pad (1) is provided with a first countersunk screw hole (15) passing through the inner side surface (13) and the sacral connection surface (11), for allowing a bone screw to pass through and connect to the patient's retained sacrum (2); the sacral support pad (1) is provided with a second countersunk screw hole (16) passing through the inner side surface (13) and the ilium connection surface (12), for allowing a bone screw to pass through and connect to the patient's ilium (3).

2. The universal lumbar sacroiliac reconstruction prosthesis according to claim 1, characterized in that: The sacral support pad (1) comprises a sacral support pad A, wherein the sacral connection surface (11) of the sacral support pad A is planar and adapted to the resection condition of retaining the intact morphology of the sacral 1 neural foramen.

3. The universal lumbar sacroiliac reconstruction prosthesis according to claim 1, characterized in that: The sacral support pad (1) comprises a sacral support pad B, wherein a sacral connection surface (11) of the sacral support pad B is provided with a semicircular nerve channel (14) at a position corresponding to the sacral 1 neural foramen (21), for adapting to the situation of bisecting along the sacral 1 neural foramen.

4. The universal lumbar sacroiliac reconstruction prosthesis according to claim 1, characterized in that: The sacral support pad (1) comprises a sacral support pad C, wherein the sacral connection surface (11) of the sacral support pad C is provided with a U-shaped nerve channel (14) for adapting to the situation where the sacral 1 neural foramen is completely removed.

5. The universal lumbar sacroiliac reconstruction prosthesis according to claim 1, characterized in that: The sacrum support pad (1) is made of titanium alloy material.

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