CN212630966U - 3D prints titanium alloy ulna coronaries false body device - Google Patents
3D prints titanium alloy ulna coronaries false body device Download PDFInfo
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- CN212630966U CN212630966U CN202021003414.7U CN202021003414U CN212630966U CN 212630966 U CN212630966 U CN 212630966U CN 202021003414 U CN202021003414 U CN 202021003414U CN 212630966 U CN212630966 U CN 212630966U
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- ulna
- mushroom body
- titanium alloy
- coronaries
- positioning column
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Abstract
The utility model discloses a 3D prints titanium alloy ulna coronal process false body device, the device include that coronal process false body, ulna implant bolt and locking screw, and coronal process false body includes the mushroom body and reference column, and locking screw penetrates from the slant perforation, and reference column vertical fixation is in mushroom body basal plane middle part, is provided with the screw hole in the bottom of reference column, and the screw hole of the bottom of bolt and reference column is implanted to the ulna passes through screw thread fixed connection. The utility model discloses a 3D prints titanium alloy ulna coronaries false body device increases the stability and the anti-rotation ability of coronaries false body, has overcome single locking screw fixed not enough to provide long-term fixed problem for coronaries false body implantation, is favorable to preventing that the elbow motion is frequent, the easy not hard up problem of false body, shortens ulna coronaries fracture patient's treatment time, reduces patient's treatment misery, provides a new choice for solving patient's coronaries crushing fracture treatment.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to 3D prints titanium alloy ulna coronarium process false body device.
Background
The selection of the treatment scheme for the ulnar coronary process fracture is closely related to fracture typing, the crushing degree of fracture blocks, the damage conditions of inner and outer collateral ligaments and an anterior joint capsule. The massive non-comminuted fracture can be subjected to incision reduction and internal fixation; the comminuted fracture can select larger fracture block to perform reduction and fixation, and the autogenous bone is transplanted to reconstruct the coronary process; repairing small coronary process fracture, and otherwise, crossing the fracture with smaller fracture blocks by using a kirschner wire and binding and fixing by using steel wires according to the situation; very small bone pieces can be resected. Because the function of the ulna coronary process is very important, the ulna coronary process fracture is carelessly treated, and the elbow joint is easy to dislocate. In the case of comminuted fracture of the ulnar coronary process, repair cannot be accomplished by open reduction and internal fixation, and methods for reconstructing the coronary process using fragments of the radius head, olecranon, ilium, or allogeneic bone are not reliable. The internal fixation mode lacks a ready solution for diagnosis and treatment of ulna comminuted fracture. For irreparable ulna coronary process fracture and non-healing indication of patients, the conventional internal fixation methods such as steel plates, screws and the like cannot be cured radically, and the root is that no artificial prosthesis capable of effectively replacing the ulna coronary process autogenous bone exists at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a 3D prints titanium alloy ulna coronaries false body device for solve and do not have the artificial prosthesis's that can effectively replace ulna coronaries autogenous bone problem at present.
The utility model provides a 3D prints titanium alloy ulna coronal process false body device, including a coronal process false body, an ulna implantation bolt and at least one locking screw, the coronal process false body includes the mushroom body and reference column, the surface of the mushroom body is enclosed by outer curved surface and baseplane, the side direction position of the mushroom body runs through and is equipped with at least one slant perforation, the slant perforation runs through in the outer curved surface of the mushroom body and the baseplane of the mushroom body, the locking screw penetrates from the slant perforation on the outer curved surface of the mushroom body, and the screwhead of locking screw exposes the baseplane of the mushroom body; an interface layer with a bone-like trabecula porous structure is arranged at the contact part of the bottom plane of the mushroom body and the ulna osteotomy surface; the positioning column is vertically fixed in the middle of the bottom plane of the mushroom body, and a screw hole is formed in the bottom of the positioning column; the ulna implanting bolt is fixedly connected with a screw hole at the bottom of the positioning column through threads.
Preferably, the mushroom body and the positioning column are formed by 3D printing of a titanium alloy material, and the mushroom body and the positioning column are integrally formed.
Preferably, the bone-like trabecula porous structure interface layer adopts a bone-like trabecula porous structure formed by 3D printing of a titanium alloy material.
Preferably, the outer curved surface of the mushroom body is provided with a plurality of caliper clamping holes, and the number of the caliper clamping holes on the outer curved surface of the mushroom body is a double number.
Preferably, the central axis of the oblique through hole is not coplanar with the longitudinal central line of the positioning column.
The utility model has the advantages that:
the utility model discloses a 3D printing titanium alloy ulna coronal process prosthesis device, which firstly implants a positioning column and an ulna implanting bolt of a coronal process prosthesis into an ulna from the upper surface and the small surface of the ulna respectively, then tries to embed a bolt head of the ulna implanting bolt into the ulna, and screws the bolt head of the ulna implanting bolt until the ulna implanting bolt is fixedly connected with the positioning column by screw thread; finally, the locking screw is penetrated and fixed on the coronal process prosthesis, and the installation of the ulna coronal process prosthesis device is completed. In addition, because the contact part of the bottom plane of the coronal process prosthesis and the ulna osteotomy surface is provided with the bone trabecula-like porous structure interface layer, the bone ingrowth in the later period is facilitated, the bone trabecula-like porous structure interface layer and the locking screw form a synergistic effect, and the long-term fixation is formed on the coronal process prosthesis. The utility model discloses a 3D prints titanium alloy ulna coronaries suddenly false body device and mounting method thereof, increase the stability and the anti-rotation ability of coronaries suddenly false body, overcome single locking screw fixation not enough for providing the problem of long-term fixing for coronaries suddenly the false body implantation, be favorable to preventing that the elbow motion is frequent, the easy not hard up problem of false body, shorten ulna coronaries suddenly the treatment time of fracture patient, it is painful to reduce patient's treatment, provide a new choice for solving patient's coronaries suddenly comminuted fracture treatment.
Drawings
Fig. 1 is a three-dimensional side view of a 3D printed titanium alloy ulnar coronal process prosthesis device provided in embodiment 1 of the present invention;
fig. 2 is a front view of an ulnar coronal process prosthesis provided in example 1 of the present invention;
fig. 3 is a side view of an ulnar coronal process prosthesis provided in example 1 of the present invention;
fig. 4 is a schematic diagram of the installation process of the ulnar coronal process prosthesis device provided in embodiment 2 of the present invention.
Detailed Description
Example 1
Example 1 an ulnar coronal process prosthetic device is provided, the structure of which is described in detail below.
Referring to fig. 1 to 3, the ulnar coronal process prosthesis apparatus includes a coronal process prosthesis 1, an ulnar implant bolt 2 and a locking screw 3.
The coronal process prosthesis 1 comprises a mushroom body 11 and a positioning post 12, wherein the mushroom body 11 is fixedly connected with the positioning post 12. Preferably, the positioning post 12 is vertically fixed in the middle of the bottom plane of the mushroom body 11, and a screw hole 7 is arranged in the bottom of the positioning post 12. The ulna implanting bolt 2 is composed of a screw rod and a bolt head, wherein the screw rod is provided with threads.
Specifically, the outer surface of the mushroom body 11 is surrounded by an outer curved surface and a bottom plane for contacting the ulnar articular surface, also referred to as a prosthetic articular surface. In order to facilitate the fixing and moving of the coronal prosthesis 1, the outer curved surface of the mushroom body 11 is provided with a plurality of caliper holding holes 4, and the caliper holding holes 4 facilitate the fixing and moving of the caliper after the caliper is held.
An oblique perforation 5 penetrates through the lateral position of the mushroom body 11, and the oblique perforation 5 penetrates through the outer curved surface of the mushroom body 11 and the bottom plane of the mushroom body 11. And the central axis of the inclined through hole 5 is not coplanar with the longitudinal central line of the positioning column 12.
The locking screw 3 is inserted through the oblique perforation 5 on the outer curved surface of the mushroom body 11, and the screw head of the locking screw 3 is exposed out of the bottom plane of said mushroom body 11, which is used for the fixed connection to the ulna model 8 to improve the stability and anti-rotation capability of the coronal process prosthesis 1.
Preferably, the number of the caliper holding holes 4 on the outer curved surface of the mushroom body 11 is a double number, and the caliper holding holes 4 are uniformly distributed on the outer curved surface of the mushroom body 11, and as a specific embodiment, the number of the caliper holding holes 4 on the outer curved surface of the mushroom body 11 is four.
The contact part of the bottom plane of the mushroom body 11 and the ulna osteotomy surface is provided with a bone trabecula simulating porous structure interface layer 6, the bone trabecula simulating porous structure interface layer 6 is of a bone trabecula simulating porous structure formed by 3D printing of a titanium alloy material, the bone trabecula simulating porous structure is a porous plane, and the bone can grow into the bone trabecula simulating porous structure interface layer 6 in the later period of the bone, so that the prosthesis can be fixed for a long time. The technology is the prior art, please refer to the chinese utility model patent "3D printing trabecula bone imitating porous bearing reinforced metal prosthesis" (application number is CN201610222225.0), wherein the porosity of the trabecula bone imitating porous structure interface layer 6 is 60-80%.
It should be noted that whether the coronal process prosthesis 1 can effectively overcome the frictional wear is the key to success of the operation, that is, the articular surface of the prosthesis, i.e., the outer curved surface of the mushroom body 11, is required to be polished to achieve a surface roughness below ra0.1. In order to reduce the wear of the articular surface and the precipitation of metal ions and increase the stability of the coronal process prosthesis 1 after implantation, a TiN coating needs to be prepared on the surface thereof. The artificial coronary prosthesis is implanted into a human body and generates black water and fretting wear through movable friction, so that the fatigue strength of the implant is rapidly reduced, and the implant is broken, and a TiN coating is prepared on the articular surface of the artificial prosthesis due to the poor wear resistance of the TC4 material, so that the wear resistance and the corrosion resistance of the artificial prosthesis can be improved, and the metal ion release performance can be improved.
Preferably, the mushroom body 11 and the positioning post 12 are formed by 3D printing of a titanium alloy material, and the mushroom body 11 and the positioning post 12 are integrally formed.
The ulna implanting bolt 2 is fixedly connected with the screw hole 7 at the bottom of the positioning column 12 through threads.
Example 2
drilling a through hole of a positioning column: drilling positioning column through holes in the lower surface of the ulna model 8 from bottom to top by using an ulna coronal process prosthesis installer, wherein the positioning column through holes respectively expose a top hole on the upper surface of the ulna model 8 and expose a bottom hole on the lower surface of the ulna model 8;
setting the coronal process prosthesis 1: clamping the two clamping holes 4 of the calipers by using the calipers to move the coronal process prosthesis 1, and placing the positioning column 12 of the coronal process prosthesis 1 into the through hole of the positioning column from the top hole of the ulna model 8;
setting an ulna implanting bolt 2: implanting the ulna implanting bolt 2 into the positioning column through hole from the bottom hole of the ulna model 8 until the ulna implanting bolt 2 penetrates through the ulna model 8 to be abutted against the positioning column 12, and the bolt head of the ulna implanting bolt 2 is close to the bottom hole of the ulna model 8;
connecting the coronal process prosthesis 1 and the ulnar implant bolt 2: clamping the two clamping holes 4 of the calipers by using the calipers to fix the coronal process prosthesis 1, and screwing the bolt head of the ulna implantation bolt 2 until the ulna implantation bolt 2 is fixedly connected with the coronal process prosthesis 1 through threads, wherein the bolt head of the ulna implantation bolt 2 is just embedded around the bottom hole of the ulna model 8;
continuing to reinforce the connection of the coronal process prosthesis 1 to the ulnar model 8: the locking screw 3 is passed through the slanted through-hole 5 into the mushroom body 11 and the locking screw 3 is tightened until the head of the locking screw 3 is fixed in the ulna model 8.
Because the external diameter of the screw rod of the ulna implanting bolt 2 is different from the external diameter of the positioning column 12, and the ulna implanting bolt 2 penetrates through the ulna model 8 to be abutted against the positioning column 12, and simultaneously, the bolt head of the ulna implanting bolt 2 is embedded into the ulna model 8, so the aperture size, the depth and the style of the ulna model 8 in the drilling process can meet the requirements.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. A3D printing titanium alloy ulna coronal process prosthesis device is characterized by comprising a coronal process prosthesis (1), an ulna implanting bolt (2) and at least one locking screw (3),
the coronal process prosthesis (1) comprises a mushroom body (11) and a positioning column (12),
the outer surface of the mushroom body (11) is defined by an outer curved surface and a bottom plane, at least one inclined through hole (5) penetrates through the lateral position of the mushroom body (11), the inclined through hole (5) penetrates through the outer curved surface of the mushroom body (11) and the bottom plane of the mushroom body (11), the locking screw (3) penetrates through the inclined through hole (5) in the outer curved surface of the mushroom body (11), and the screw head of the locking screw (3) is exposed out of the bottom plane of the mushroom body (11);
an artificial bone trabecula porous structure interface layer (6) is arranged at the contact part of the bottom plane of the mushroom body (11) and the ulna osteotomy surface;
the positioning column (12) is vertically fixed in the middle of the bottom plane of the mushroom body (11), and a screw hole (7) is formed in the bottom of the positioning column (12);
the ulna implanting bolt (2) is fixedly connected with a screw hole (7) at the bottom of the positioning column (12) through threads.
2. The 3D-printed titanium alloy ulnar coronal process prosthetic device of claim 1,
the mushroom body (11) and the positioning column (12) are formed by 3D printing of titanium alloy materials, and the mushroom body (11) and the positioning column (12) are integrally formed.
3. The 3D-printed titanium alloy ulnar coronal process prosthetic device of claim 1,
the bone-imitated trabecula porous structure interface layer (6) is of a bone-imitated trabecula porous structure formed by 3D printing of a titanium alloy material.
4. The 3D-printed titanium alloy ulnar coronal process prosthetic device of claim 1,
the outer curved surface of the mushroom body (11) is provided with a plurality of caliper clamping holes (4), and the number of the caliper clamping holes (4) on the outer curved surface of the mushroom body (11) is two.
5. The 3D-printed titanium alloy ulnar coronal process prosthetic device of claim 1,
the central axis of the inclined through hole (5) is not coplanar with the longitudinal central line of the positioning column (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021003414.7U CN212630966U (en) | 2020-06-04 | 2020-06-04 | 3D prints titanium alloy ulna coronaries false body device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021003414.7U CN212630966U (en) | 2020-06-04 | 2020-06-04 | 3D prints titanium alloy ulna coronaries false body device |
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| Publication Number | Publication Date |
|---|---|
| CN212630966U true CN212630966U (en) | 2021-03-02 |
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| CN202021003414.7U Active CN212630966U (en) | 2020-06-04 | 2020-06-04 | 3D prints titanium alloy ulna coronaries false body device |
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