CN114668556A - Structure of 3D titanium mesh prosthesis for intramedullary nail - Google Patents

Abstract

The invention discloses a structure of a 3D titanium mesh prosthesis for an intramedullary nail, which comprises a prosthesis main body, a first through groove, a titanium mesh main body, a longitudinal reinforcing rib, a transverse reinforcing rib, a first mounting hole, a titanium nail assembly, a connecting column, an external thread, a first accommodating groove, a second through groove, a first guide groove, a first nut, a through hole, a second guide groove, a second accommodating groove, a check ring, a notch, a bending block, a second nut, a cross groove, a connecting rod, a screw column and a connecting block, wherein the reinforcing rib structure is designed on the prosthesis main body, so that the mechanical performance of the prosthesis can be improved; the titanium nail component is designed, is fastened in the skeleton through the internal fixture block structure, is not required to be fixed with the skeleton through the screw teeth, can realize locking and anti-falling, and can reduce the damage to the skeleton compared with a long screw; the prosthesis designed by the invention has high porosity, the callus can grow in, the prosthesis and the long bone are integrated, and the problem of difficult bone graft source caused by the large-section bone defect of the long bone can be thoroughly solved.

Description

Structure of a 3D titanium mesh prosthesis for intramedullary nailing

technical field

The invention relates to the technical field of medical devices, in particular to a structure of a 3D titanium mesh prosthesis for intramedullary nails.

Background technique

3D titanium mesh prosthesis is a personalized titanium mesh prepared by digital modeling technology combined with 3D printing process, which can accurately reconstruct the three-dimensional volume and three-dimensional position of the bone, and can formulate a surgical plan in advance, eliminating the need for manual shaping during surgery, and greatly shortening the time. The operation time is good, and it has the characteristics of good appearance and high precision; most of the existing 3D titanium mesh prostheses are used to directly replace the missing osteogenesis, and there is no application of reinforcing broken bones with intramedullary nails and assisting the healing of broken bones; existing Most of the 3D titanium mesh prostheses are designed as a completely hollow mesh structure, which lacks a reinforced structure design, resulting in poor anti-distortion effect; most of the existing 3D titanium mesh prostheses are fixed with titanium nails, and the long screws that penetrate through them cause damage to the bones. The large and short screws cannot ensure the firmness of the joint position with the bone because the screw teeth are too small.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a structure of a 3D titanium mesh prosthesis for intramedullary nails, so as to solve the problems raised in the above background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: a structure of a 3D titanium mesh prosthesis for intramedullary nails, including a prosthesis main body, the outer wall of the prosthesis main body is provided with a first through groove, the first through groove There is a titanium mesh main body inside, the outer wall of the prosthesis main body is provided with longitudinal reinforcement ribs, the outer wall of the prosthesis main body is provided with transverse reinforcement ribs, the outer wall of the prosthesis main body is provided with a first installation hole, the first installation hole is Titanium nail assemblies are installed inside.

Preferably, the titanium nail assembly includes a connecting column, a connecting column is installed inside the first installation hole, a first accommodating groove is opened inside the connecting column, a first guiding groove is opened on the inner wall of the first accommodating groove, and the first accommodating groove is The number of a guide groove is two, the bottom end of the first guide groove is provided with a second through groove, the interior of the first accommodating groove is slidably connected with a connecting block, and the outer walls on both sides of the connecting block are fixedly connected with guide protrusions, and The guide protrusion is slidably connected to the inner wall of the first guide groove, the lower surface of the connection block is fixedly connected with an elastic sheet, and the number of elastic sheets is two, and a clamping block is fixedly connected to the outer wall of one side of the elastic sheet, and the clamping block It is slidably connected to the inside of the second through slot, the upper surface of the connecting block is provided with a second installation hole, the inner wall of the second installation hole is threadedly connected with a screw column, the top of the screw column is fixedly connected with a connecting rod, and the top of the connecting rod is fixed A second nut is connected, the upper surface of the connecting column is fixedly connected with a first nut, the upper surface of the first nut is provided with a second accommodating groove, and the second nut is sleeved inside the second accommodating groove.

Preferably, a through hole is formed on the lower surface of the first nut, and the through hole is connected to the second accommodating groove, the inner wall of the through hole is formed with a second guide groove, and the second guide groove is connected with the first guide groove. Slot conduction connection.

Preferably, one end of the connecting column is provided with an external thread, and the connecting column is threadedly connected to the inner wall of the first installation hole through the external thread.

Preferably, the upper surface of the first nut is fixedly connected with a retaining ring, the outer wall of the retaining ring is provided with a gap, and the number of gaps is four, and the inner wall of the gap is fixedly connected with a bending block, and the bending block One end of the nut is arranged on the top end of the second nut.

Preferably, a cross groove is formed on the upper surface of the second nut.

Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is designed with a reinforcing rib structure on the main body of the prosthesis, which can improve the mechanical properties of the prosthesis; the present invention is designed with titanium nail assemblies, which are fastened by an internal block structure Inside the bone, there is no need to fix the screw teeth with the bone, which can realize locking and anti-fall, and compared with long screws, the damage to the bone can be reduced; The integration of the body and the long bone can completely solve the problem of the difficulty in the source of bone graft caused by the defect of the large segment of the long bone.

Description of drawings

Fig. 1 is the overall top view sectional structure schematic diagram of the present invention;

Fig. 2 is an enlarged view of the structure of region A in Fig. 1;

FIG. 3 is a schematic three-dimensional structure diagram of the titanium nail assembly of the present invention;

4 is a schematic diagram of the three-dimensional structure of the prosthesis main body of the present invention;

In the figure: 1. The main body of the prosthesis; 10. The first through groove; 11. The main body of the titanium mesh; 12. The longitudinal reinforcement ribs; Post; 200, external thread; 201, first accommodating groove; 202, second through groove; 203, first guide groove; 204, first nut; 2040, through hole; 2041, second guide groove; 2042, first 2. accommodating groove; 2043, retaining ring; 2044, gap; 2045, bending block; 21, second nut; 210, cross groove; 211, connecting rod; 212, screw post; 22, connecting block; 220, second Mounting hole; 221, guide bump; 222, elastic sheet; 223, clamping block.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-4, an embodiment provided by the present invention: a structure of a 3D titanium mesh prosthesis for intramedullary nails, including a prosthesis main body 1, the outer wall of the prosthesis main body 1 is provided with a first through groove 10 , a titanium mesh main body 11 is arranged inside the first through groove 10, a longitudinal reinforcing rib 12 is arranged on the outer wall of the prosthesis main body 1, a transverse reinforcing rib 13 is arranged on the outer wall of the prosthesis main body 1, and the outer wall of the prosthesis main body 1 is arranged A first installation hole 14 is opened, and the titanium nail assembly 2 is installed inside the first installation hole 14; the titanium nail assembly 2 includes a connecting column 20, and a connecting column 20 is installed inside the first installation hole 14, and the interior of the connecting column 20 is opened There is a first accommodating groove 201, the inner wall of the first accommodating groove 201 is provided with a first guide groove 203, and the number of the first guide groove 203 is two, and the bottom end of the first guide groove 203 is provided with a second through groove 202 , a connecting block 22 is slidably connected to the inside of the first accommodating groove 201, and guide bumps 221 are fixedly connected to the outer walls of both sides of the connecting block 22, and the guide bumps 221 are slidably connected to the inner wall of the first guide groove 203. The connecting block The lower surface of 22 is fixedly connected with elastic pieces 222, and the number of the elastic pieces 222 is two, and one side outer wall of the elastic piece 222 is fixedly connected with a clamping block 223, and the clamping block 223 is slidably connected to the inside of the second through slot 202 , the upper surface of the connecting block 22 is provided with a second installation hole 220, the inner wall of the second installation hole 220 is threadedly connected with a screw post 212, the top of the screw post 212 is fixedly connected with a connecting rod 211, and the top of the connecting rod 211 is fixedly connected with a The second nut 21, the upper surface of the connecting column 20 is fixedly connected with the first nut 204, the upper surface of the first nut 204 defines a second accommodating groove 2042, and the second nut 21 is sleeved in the second accommodating groove The inside of 2042; the lower surface of the first nut 204 is provided with a through hole 2040, and the through hole 2040 is connected to the second accommodating groove 2042, the inner wall of the through hole 2040 is provided with a second guide groove 2041, and the second guide The groove 2041 is connected to the first guide groove 203; one end of the connecting post 20 is provided with an external thread 200, and the connecting post 20 is threadedly connected to the inner wall of the first mounting hole 14 through the external thread 200; the upper part of the first nut 204 A retaining ring 2043 is fixedly connected on the surface, a gap 2044 is opened on the outer wall of the retaining ring 2043, and the number of gaps 2044 is four, and a bending block 2045 is fixedly connected to the inner wall of the gap 2044, and one end of the bending block 2045 is set on the The top of the second nut 21 ; the upper surface of the second nut 21 is provided with a cross groove 210 .

Working principle: When using the present invention with the intramedullary nail to reinforce the broken bone and assist the healing of the broken bone, firstly, according to the patient's bone parameters, use 3D printing technology to manufacture a prosthesis, which consists of a prosthesis body 1 and a first through slot 10 , Titanium mesh main body 11, longitudinal reinforcement ribs 12, transverse reinforcement ribs 13 and the first installation hole 14, the prosthesis main body 1 is a circular hollow, the inner diameter is about 9-11mm, the ring thickness is about 5-8mm, and the shape can pass through the intramedullary. Nails, the 3D printing pore range is 60-90%, the pore diameter range is 300-600um, and the elastic modulus is 10.0-20.0Gpa; the prosthesis body 1 is installed between the broken bones, and fixed by the titanium nail component 2, that is, it corresponds to the bone. Drill a hole at the position of the first mounting hole 14, turn the first nut 204, and fasten the connecting post 20 in the first mounting hole 14 through the external thread 200, so that the end of the connecting post 20 is inserted into the bone, and the second receiving The second nut 21 in the groove 2042 drives the screw column 212 to rotate through the connecting rod 211 , the screw column 212 drives the connecting block 22 through the second mounting hole 220 , and the connecting block 22 slides up along the second guide groove 2041 through the guide protrusion 221 , the connecting block 22 drives the blocking block 223 to move up through the elastic sheet 222, and makes the blocking block 223 pop out from the second through slot 202. The top of the blocking block 223 presses against the inner wall of the bone to achieve locking and anti-fall. When disassembling, it can be reversed. Rotate the first nut 204 to make the connecting block 22 slide down, and retract the locking block 223 into the first accommodating groove 201 to release the locking; wherein, the first guiding groove 203 on the through hole 2040 is used for assembling the connecting block 22 The notch 2044 on the retaining ring 2043 is used for cooperating with the screwdriver, the cross groove 210 on the second nut 21 is used for cooperating with the screwdriver, and the bending block 2045 is used for limiting the position of the second nut 21 .

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the appended claims. All changes within the meaning and range of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

Claims (6)

1. A structure of a 3D titanium mesh prosthesis for intramedullary nails, comprising a prosthesis main body (1), characterized in that: a first through groove (10) is opened on the outer wall of the prosthesis main body (1), A titanium mesh main body (11) is arranged inside a through groove (10), longitudinal reinforcing ribs (12) are arranged on the outer wall of the prosthesis main body (1), and transverse reinforcing ribs (12) are arranged on the outer wall of the prosthesis main body (1). 13), a first installation hole (14) is opened on the outer wall of the prosthesis body (1), and a titanium nail assembly (2) is installed inside the first installation hole (14). 2. The structure of a 3D titanium mesh prosthesis for intramedullary nails according to claim 1, wherein the titanium nail assembly (2) comprises a connecting column (20), and the first mounting hole (14) has a A connecting column (20) is installed inside, a first accommodating groove (201) is opened inside the connecting column (20), and a first guide groove (203) is opened on the inner wall of the first accommodating groove (201), and the first guide The number of grooves (203) is two, the bottom end of the first guide groove (203) is provided with a second through groove (202), and the interior of the first accommodating groove (201) is slidably connected with a connecting block (22), the connecting block Guide bumps (221) are fixedly connected to the outer walls on both sides of (22), and the guide bumps (221) are slidably connected to the inner wall of the first guide groove (203), and the lower surface of the connecting block (22) is fixedly connected with a The elastic sheet (222) has two elastic sheets (222), and a clamping block (223) is fixedly connected to one outer wall of the elastic sheet (222), and the clamping block (223) is slidably connected to the second through groove Inside (202), the upper surface of the connecting block (22) is provided with a second mounting hole (220), the inner wall of the second mounting hole (220) is threadedly connected with a screw post (212), and the top of the screw post (212) A connecting rod (211) is fixedly connected, a second nut (21) is fixedly connected to the top of the connecting rod (211), and a first nut (204) is fixedly connected to the upper surface of the connecting column (20). The upper surface of (204) is provided with a second accommodating groove (2042), and the second nut (21) is sleeved inside the second accommodating groove (2042). The structure of a 3D titanium mesh prosthesis for intramedullary nails according to claim 2, characterized in that: a through hole (2040) is opened on the lower surface of the first nut (204), and the through hole (2040) is electrically connected to the second accommodating groove (2042), the inner wall of the through hole (2040) is provided with a second guide groove (2041), and the second guide groove (2041) guides the first guide groove (203) through connection. The structure of a 3D titanium mesh prosthesis for intramedullary nails according to claim 2, characterized in that: one end of the connecting column (20) is provided with an external thread (200), and the connecting column (20) The outer thread (200) is screwed to the inner wall of the first installation hole (14). 5. The structure of a 3D titanium mesh prosthesis for intramedullary nails according to claim 2, characterized in that: a retaining ring (2043) is fixedly connected to the upper surface of the first nut (204), and the retaining ring There are gaps (2044) on the outer wall of (2043), and the number of gaps (2044) is four, the inner wall of the gap (2044) is fixedly connected with a bending block (2045), and one end of the bending block (2045) Set on the top of the second nut (21). 6. The structure of a 3D titanium mesh prosthesis for intramedullary nails according to claim 5, wherein a cross groove (210) is formed on the upper surface of the second nut (21).

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