CN219538595U - Novel 3D printed lunar bone prosthesis - Google Patents

Abstract

The utility model discloses a novel 3D printed lunar bone prosthesis, which comprises a lunar bone prosthesis in a crescent shape, wherein a plurality of suture holes are formed in the upper end and the lower end of the lunar bone prosthesis, a metal trabecular rough surface imitating a spongy bone structure is arranged on two sides of the lunar bone prosthesis, a first smooth surface is arranged on the concave surface of the lunar bone prosthesis, and a second smooth surface is arranged on the convex surface of the lunar bone prosthesis; the suture holes are arc-shaped structure holes; the utility model prepares the lunar bone prosthesis by 3D printing technology, and uses the suture holes at the upper and lower ends of the lunar bone prosthesis to suture and fix; the small Liang Cucao surfaces of the honeycomb-shaped cancellous bone-like structures on the two sides of the lunar bone prosthesis provide a growing and fixing space for soft tissues; the lunar bone prosthesis is contacted and moved with the head bone and the distal joint surface of the radius respectively through smooth surfaces on the concave surface and the convex surface.

Description

Novel 3D printed lunar bone prosthesis

Technical Field

The utility model relates to the technical field of medical treatment, in particular to a novel 3D printed lunar bone prosthesis.

Background

The lunar bone is positioned at the wrist part of the human body, is one of eight carpal bones, is half-moon-shaped, is positioned between the navicular bone and the triangular bone, and is divided into six surfaces of left, right, front, back, palm side and back side, and is respectively articulated with the head bone, the navicular bone, the triangular bone and the distal joint surface of the radius. Usually, when the wrist is extended back and palms are bent, the moon bone moves to a certain extent on the joint surface of the distal radius and the cephalic bone. When the wrist falls down, the wrist is extremely extended, the lunar bone is extruded between the lower distal end of the radius and the cephaliform bone, the joint capsule is broken, the lunar bone is dislocated to the palm side, and the lunar bone can rotate by 90-270 degrees. If the metacarpal ligament is intact, the blood supply of the lunar bone can still be supplied by the blood vessels in the ligament, and if the lunar bone can be restored in early stage, the lunar bone can keep blood circulation, and the wrist joint can also keep better function; if the joint is completely dislocated, the ligaments on the palmar side and the dorsal side of the wrist break, the blood supply of the lunar bone is lost, and ischemic necrosis can occur.

The wrist joint tension is easily increased after the osteonecrosis, and the surrounding ligaments and joint bursa edema are caused, so that obvious wrist joint swelling, pain and limited movement are caused, the patient is not dared to move the hands, and the life quality of the patient is greatly reduced.

The patient with ischemic necrosis of the moon needs to be treated by an operation, and the previous operation scheme adopted for the patient with ischemic necrosis of the moon is to remove the moon. The types of prostheses used in clinic are more, including bone cement, metal balls, silicon rubber, titanium alloy, ceramics and the like. The moon bone belongs to irregular bones, the shapes are changeable, the existing various types of moon bone prostheses are mostly manufactured by material reduction processing, the processing difficulty for irregular shapes is high, and the situations that the sizes and the shapes of artificial prostheses are not matched with patients and the like are easy to occur; the implanted lunar bone prosthesis is not firmly fixed, and dislocation can also occur, so that secondary damage is caused to a patient; and the moon bone is changeable in shape, difficult to take and place in the operation process, and inconvenient in the operation process.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the novel lunar bone prosthesis with reasonable structure, easy fixation and good function for 3D printing.

The utility model is realized by the following technical scheme:

the novel 3D printed lunar bone prosthesis comprises a lunar bone prosthesis in a crescent shape, wherein a plurality of suture holes (1) are formed in the upper end and the lower end of the lunar bone prosthesis, a small Liang Cucao surface (2) of a metal bone with a honeycomb-shaped spongy bone-like structure is arranged on the two sides (a navicular bone contact surface and a triangular bone contact surface) of the lunar bone prosthesis, a first smooth surface (3) is arranged on the concave surface of the lunar bone prosthesis, and a second smooth surface (4) is arranged on the convex surface of the lunar bone prosthesis; the suture hole (1) is an arc-shaped structure hole.

In a further scheme, the number of suture holes (1) at two ends of the lunar bone prosthesis is four at one end.

In a further scheme, in the four suture holes (1), two suture holes (1) and the other two suture holes (1) are in a crossed and non-communicated structure.

In a further scheme, the inner wall of the suture hole (1) is a smooth cambered surface.

In a further aspect, the honeycomb small holes of the rough surface (2) are mutually communicated, and the depth of the honeycomb small holes is more than one fourth of the width of the lunar bone prosthesis.

In a further scheme, the concave surface of the first smooth surface (3) is matched with the shape of the head-shaped bone joint surface of the wrist of the human body.

In a further scheme, the convex surface of the second smooth surface (4) is matched with the shape of the distal radius joint surface of the forearm of the human body.

The working principle of the utility model is as follows:

the utility model prepares the lunar bone prosthesis by 3D printing technology, and uses suture holes at two ends of the lunar bone prosthesis for suture fixation; the small Liang Cucao surface of the metal bone of the honeycomb type imitation cancellous bone structure on two sides (navicular bone contact surface and triangular bone contact surface) of the lunar bone prosthesis can provide a growing and fixing space for soft tissues; the lunar bone prosthesis is contacted and moved with the head bone and the distal joint surface of the radius respectively through smooth surfaces on the concave surface and the convex surface.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model uses the suture hole to suture and fix the lunar bone prosthesis, ensures the position fixation of the lunar bone prosthesis after the operation to be firm, prevents the dislocation of the lunar bone prosthesis and causes secondary damage to patients;

the suture hole is an arc-shaped structure hole, so that an arc-shaped suture needle can conveniently pass through the suture hole to be sutured and fixed, the suture smoothness is improved, and the suture difficulty is reduced;

metal bone trabecular rough surfaces of honeycomb-shaped cancellous bone-like structures are arranged on two sides (navicular bone contact surfaces and triangular bone contact surfaces) of the lunar bone prosthesis, a growing space is provided for soft tissues, suture lines are assisted to fix the lunar bone prosthesis, if the suture lines are loosened or broken after a period of time, soft tissues of the lunar bone prosthesis also grow into small Liang Cucao-surface pores of the metal bones to be fixed, and further the firmness of fixing the prosthesis is improved;

the concave surface and the convex surface of the lunar bone prosthesis are arranged to be smooth and highly polished joint surfaces, so that friction force generated when the lunar bone prosthesis moves with the contact surface of the head bone and the radius can be reduced, and frictional damage of the lunar bone prosthesis to the head bone and the radius can be prevented;

the shapes of the concave surface and the convex surface of the lunar bone prosthesis are respectively matched with the shapes of the head-shaped bone and the radius distal joint surface, so that the lunar bone prosthesis is ensured to be matched with the cartilage shapes of the head-shaped bone and the radius distal joint surface, and the lunar bone prosthesis is prevented from causing extrusion damage to the head-shaped bone and the radius.

The size and shape of the lunar bone prosthesis are designed and customized according to CT data of the lunar bone of the wrist joint at the healthy side, so that the manufacturing accuracy of the lunar bone prosthesis is ensured, and further, the good function of the wrist joint after operation is ensured.

Drawings

FIG. 1 is a schematic perspective view of a first smooth surface according to the present utility model;

FIG. 2 is a schematic perspective view of a second smooth surface according to the present utility model;

FIG. 3 is a perspective view of a suture hole of the present utility model;

fig. 4 is a use state diagram of the present utility model.

Reference numerals in the drawings:

1-suture holes;

2-rough surface;

3-a first smooth surface;

4-a second smooth surface;

5-cephalic bone;

6-radius.

Detailed Description

In order to enable those skilled in the art to better understand the technical scheme of the present utility model, the following detailed description is provided with reference to the accompanying drawings.

As shown in fig. 1-4, a 3D printed novel lunar bone prosthesis comprises a lunar bone prosthesis in a crescent shape, wherein a plurality of suture holes 1 are formed in the upper end and the lower end of the lunar bone prosthesis, a small Liang Cucao surface 2 of a metal bone imitating a spongy bone structure in a honeycomb shape is arranged on the two sides of the lunar bone prosthesis, a first smooth surface 3 is arranged on the concave surface of the lunar bone prosthesis, and a second smooth surface 4 is arranged on the convex surface of the lunar bone prosthesis.

In some embodiments, the sides of the moon prosthesis are the contact surfaces of the moon prosthesis with navicular and triangular bones; the concave surface of the lunar bone prosthesis is the contact surface of the lunar bone prosthesis and the cephalic bone; the convex surface of the lunar prosthesis is the contact surface of the lunar prosthesis and the distal joint surface of the radius.

In some embodiments, as shown in fig. 3, the number of suture holes 1 at the upper end and the lower end of the lunar bone prosthesis is four at one end, and the suture holes 1 are used for suturing and fixing the lunar bone prosthesis.

In some embodiments, as shown in fig. 3, two suture holes 1 and the other two suture holes 1 are in a crossed and non-communicated structure in the four suture holes 1, so that the suture is convenient to suture in different directions for the lunar bone prosthesis, and the suture stability of the lunar bone prosthesis is enhanced.

In some embodiments, as shown in fig. 3, the suture hole 1 is an arc-shaped hole, so that an arc-shaped suture needle can conveniently pass through the suture hole 1 to suture, thereby improving the smoothness of suture and reducing the difficulty of suture.

In some embodiments, the inner wall of the suture hole 1 is a smooth cambered surface, so that the suture needle can conveniently pass through the suture hole 1, and the suture needle is prevented from being blocked in the perforation process.

In some embodiments, the metal bone cells Liang Xiaokong of the cellular spongy bone-like structure of the rough surface 2 are mutually communicated, and the depth of the cellular small holes is more than one fifth of the width of the lunar bone prosthesis, so that soft tissues can grow into the cellular small holes of the rough surface 2, auxiliary fixation of the lunar bone prosthesis is formed, and dislocation of the lunar bone prosthesis is prevented; if the suture is loose or broken after a period of time, the lunar bone prosthesis may also be secured by an ingrowth connection with the soft tissue.

In some embodiments, the concave surface of the first smooth surface 3 is adapted to the shape of the cephalad bone articular surface of the wrist of the human body, preventing the bone prosthesis from causing frictional or compressive damage to the cephalad bone.

In some embodiments, the convex surface of the second smooth surface 4 is adapted to the shape of the distal radius articular surface of the lower arm of the human body, preventing the distal radius articular surface from being damaged by frictional or compressive forces by the lunar prosthesis.

In some embodiments, the lunar bone prosthesis is manufactured by adopting 3D printing, so that the irregular lunar bone prosthesis is convenient to process, and the high-matching lunar bone prosthesis replacement is realized by carrying out one-to-one modeling printing on the lunar bone appearance of a patient according to CT data of the lunar bone of the healthy side wrist joint, thereby being beneficial to the recovery of the activity function of the wrist joint of the patient, and greatly reducing the activity damage of the lunar bone prosthesis on the cephalic bone and the radius in the movement process.

In some embodiments, the 3D printing material of the lunar bone prosthesis is preferably a titanium alloy.

The working mode of the utility model is as follows:

before the utility model is used, the model is built one by one on the lunar bone of a patient in advance through CT data of the wrist of the patient, a lunar bone prosthesis matched with the patient is manufactured through 3D printing, and preoperative simulation analysis can be carried out through CT data of the wrist of the patient and the model, so that the lunar bone prosthesis is ensured to be matched with bones of the wrist of the patient.

When the utility model is used, an operator firstly takes out the diseased lunar bone of a patient, then clamps the lunar bone prosthesis by using a surgical instrument and correctly places the lunar bone prosthesis at the correct position of the lunar bone of the wrist of the patient, the first smooth surface of the lunar bone prosthesis faces the head-shaped bone joint surface, the second smooth surface of the lunar bone prosthesis faces the radius distal end joint surface, after ensuring the position of the lunar bone prosthesis to be correct, the lunar bone prosthesis is sutured and fixed on soft tissues around the prosthesis by using a suture needle through suture holes, and surgical incisions are sutured after the fixation is completed.

It should be noted that the foregoing describes the technical solution of the present utility model in detail, and describes the principles of the present utility model, and the description of the above working principles is only used to help understand the core idea of the present utility model. It should be noted that it will be apparent to those skilled in the art that the present utility model may be modified and adapted without departing from the principles of the present utility model, and such modifications and adaptations are intended to be within the scope of the appended claims.

Claims (9)

1. The utility model provides a novel moon bone prosthesis of 3D printing, is provided with a plurality of suture hole (1), its characterized in that including being crescent moon bone prosthesis at moon bone prosthesis's both ends: the two sides of the non-joint surface of the lunar bone prosthesis are provided with small Liang Cucao surfaces (2) of the honeycomb-shaped spongy bone-imitating structure, the concave surface of the lunar bone prosthesis is provided with a first smooth surface (3), and the convex surface of the lunar bone prosthesis is provided with a second smooth surface (4); the suture hole (1) is an arc-shaped structure hole, and is easy for a suture needle to pass through.

2. A 3D printed new model of a lunar bone prosthesis according to claim 1, characterized in that: the number of suture holes (1) at the upper end and the lower end of the lunar bone prosthesis is four at one end respectively.

3. A 3D printed new model of a lunar bone prosthesis according to claim 2, characterized in that: of the four suture holes (1), two suture holes (1) and the other two suture holes (1) are in a crossed and non-communicated structure.

4. A 3D printed new model of a lunar bone prosthesis according to claim 1, characterized in that: the inner wall of the suture hole (1) is a smooth cambered surface.

5. A 3D printed new model of a lunar bone prosthesis according to claim 1, characterized in that: the honeycomb small holes of the rough surface (2) are mutually communicated, and the depth of the honeycomb small holes is more than one fifth of the width of the lunar bone prosthesis.

6. A 3D printed new model of a lunar bone prosthesis according to claim 1, characterized in that: the concave surface of the first smooth surface (3) is matched with the shape of the head bone of the wrist of the human body.

7. A 3D printed new model of a lunar bone prosthesis according to claim 1, characterized in that: the convex surface of the second smooth surface (4) is matched with the shape of the distal radius joint surface of the forearm of the human body.

8. A 3D printed new model of a lunar bone prosthesis according to claim 1, characterized in that: the size and shape of the lunar bone prosthesis are designed and customized according to CT data of the lunar bone of the wrist joint at the healthy side.

9. A 3D printed new model of a lunar bone prosthesis according to claim 1, characterized in that: the two sides of the non-joint surface of the lunar bone prosthesis are contacted with surrounding soft tissues.