Adjusting prosthesis

Abstract

An adjusting prosthesis effectively solves the problems that when an existing wrist joint prosthesis is used, control and adjustment are inconvenient, and the fixing process is tedious and inconvenient. Comprising a main connecting block, the upper side of the main connecting block inclines in a left-low right-high mode, the upper end face of the main connecting block is an arc-shaped face which is sunken downwards, a hemispherical fixing sleeve is fixed to the lower side in the main connecting block, a sphere is arranged in the fixing sleeve, and the lower end of the sphere extends out of the fixing sleeve and is fixedly provided with a guide cylinder; the outer side of the guide cylinder is sleeved with a plurality of supporting pieces evenly distributed in the up-down direction, the projections of the supporting pieces in the front-back direction can form a big-end-up trapezoid, the projections of the supporting pieces in the up-down direction are oval, a threaded column capable of rotating in the up-down axial direction is arranged in the guide cylinder, and the lower end of the threaded column is in threaded connection with an extension cylinder. The lower end of the extension cylinder penetrates through the guide cylinder; the device is simple in structure, convenient to operate, novel in conception and high in usability.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary equipment, and in particular to an adjusting prosthesis. Background Art

[0002] There are many reasons for articular cartilage injury. Once the articular cartilage is damaged, the movement function of the joint will be affected. With the obvious increase in the degree of competition, there is an upward trend in sports joint injuries. Sports articular cartilage injuries require artificial joint replacement when necessary. With the development of medicine, the demand for artificial joints will become greater and greater. Artificial joints have to replace the functions of joints, so the requirements for materials are very high. Although there are many types of artificial joint materials, the quality of the artificial joints used has not achieved the ideal clinical effect; wrist replacement is not as common as knee or hip replacement, but if other treatments are not very effective, wrist replacement can be a good choice. In wrist replacement surgery, the damaged part of the wrist bone is removed, and the artificial part that replaces it is called a prosthesis; During the specific operation, an incision is made on the back of the wrist, the end of the damaged forearm bone will be removed, and the first row of carpal bones may also be removed. The prosthesis is implanted in the radius on the outside of the lower arm and then fixed with bone cement. Depending on the design of the component, the carpal component is inserted into the middle metacarpal position (third metacarpal) or screwed into other carpal bones. Bone cement can be used to fix the position of the component. The carpal bones can be connected or fused together to better protect the safety of the component. Then, a pad that can cooperate with the radial component is fixed on the carpal component. However, the existing prosthesis cannot control the angle and position of the prosthesis during operation. During the specific operation, due to the difference between the radial component and the carpal component, the prosthesis cannot be adjusted. There is no specific connection between the parts, and the areas of radius and carpal bone resected are different for each person, so they need to be pre-assembled by using molds of different angles and sizes, and the prosthesis can be installed after it is in the correct position. The process is cumbersome and inconvenient, and bone cement needs to be applied to the prosthesis connection, as well as the connection between the prosthesis and the carpal bone and radius during fixation. The operation is cumbersome, which reduces the surgical efficiency of medical staff. At the same time, for patients with more radius resection, the existing radius component cannot control the extension and contraction of the controller connection, resulting in reduced effect of supporting the patient's wrist. In addition, the existing prosthesis component is fixed in a single way, with poor support and stability. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide an adjustable prosthesis, which effectively solves the problems that the existing wrist joint prosthesis is inconvenient to control and adjust during use, and the fixing process is cumbersome and inconvenient.

[0004] The technical solution is as follows: the present invention comprises a main connecting block, the upper side of the main connecting block is inclined with the left side lower and the right side higher, and the upper end face thereof is an arc surface which is concave downwards, a hemispherical fixing sleeve is fixed on the lower side of the main connecting block, a sphere is arranged in the fixing sleeve, the lower end of the sphere extends out of the fixing sleeve and is fixed with a guide cylinder, the cross section of the guide cylinder is an elliptical cross section, a plurality of supporting sheets evenly distributed in the up-down direction are arranged on the outer side of the guide cylinder, the projections of the plurality of supporting sheets in the front-back direction can form a trapezoid which is larger at the top and smaller at the bottom, the projections of the supporting sheets in the up-down direction are an elliptical cross section, a threaded column which is axially and rotatable at the top and the bottom, an extension cylinder which is threadedly connected at the lower end of the threaded column, the lower end of the extension cylinder passes through the guide cylinder and extends out, a plurality of deformation holes which are evenly distributed in the up-down direction and along the circumferential direction of the threaded column are opened on the lower side of the guide cylinder, the material of the guide cylinder at the deformation hole is a deformable material, a slider which is threadedly connected to the threaded column is slidably connected to the inner side of the guide cylinder, and the lower side of the slider is an inclined shape which is larger at the top and smaller at the bottom; A slide groove connected with the deformation hole is provided on the lower side of the slide cylinder, and the lower end of the slider can be inserted into the slide groove and can push the lower side of the guide cylinder to extend outward. A pad is provided above the main connecting block, and the lower end of the pad is an ellipsoidal arc surface. A secondary connecting block is provided above the pad, and plug blocks are respectively fixed on the left and right sides of the upper end of the pad. The plug block is detachably connected to the secondary connecting block and can slide up and down. Two bolts opposite to each other are detachably connected on the upper side of the secondary connecting block, and a positioning column located between the two bolts is fixed on the upper end of the secondary connecting block. Liquid replenishment holes in the upper and lower directions are respectively provided on the positioning column, the bolt and the threaded column, and a plurality of leakage holes evenly distributed along the upper and lower directions and through the left and right directions are respectively provided on the positioning column, the bolt and the threaded column.

[0005] The invention has an ingenious structure and is easy to use. By arranging the main connecting block, the auxiliary connecting block, the cushion block, the guide cylinder, the extension cylinder and the support plate, it is convenient for medical staff to control and adjust the angle and position of the prosthesis according to needs. Moreover, according to the different areas of the radius and carpal bone resected by each person during the specific operation, the position of the prosthesis can be adjusted to the correct position before the prosthesis is installed. The process is quick and convenient, and there is no need to repeatedly apply bone cement to the prosthesis connection and the connection between the prosthesis and the carpal bone and the radius during fixation. It is only necessary to quickly push the bone cement through the outer notch, the round groove and the external groove after positioning the position to complete the filling of the bone cement, so that the prosthesis components in the application are fixed while the prosthesis components are connected to the patient's bones. The operation saves time and effort, and effectively improves the surgical efficiency of medical staff. At the same time, for patients with more radius resection, the connection can be controlled to be extended and retracted. Through multiple fixing methods, the support effect at the patient's wrist joint is improved, and the stability during fixation is improved. The connection is more firm and the service life is longer. The structure is simple, the operation is convenient, the conception is novel, and the usability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is an axonometric view of the present invention.

[0007] Figure 2 It is a full-section main axonometric drawing of the present invention.

[0008] Figure 3 It is a partially cutaway right axonometric view of the present invention.

[0009] Figure 4 It is a partially cutaway right axonometric view of the present invention.

[0010] Figure 5 It is a partially cutaway top axonometric view of the present invention.

[0011] Figure 6 It is a partially cutaway top axonometric view of the present invention.

[0012] Figure 7 It is a parts diagram of the auxiliary connecting block and the cushion block of the present invention.

[0013] Figure 8 It is a parts diagram of the main connecting block of the present invention.

[0014] Fig. 9 It is a partially cutaway right view of the present invention.

[0015] Fig.10 It is a partially cutaway front view of the present invention.

[0016] Fig.11 It is a parts diagram of the crown gear of the present invention. DETAILED DESCRIPTION

[0017] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0018] Depend on Figures 1 to 11 The invention provides a main connecting block 1, wherein the upper side of the main connecting block 1 is inclined with the left side lower and the right side higher, and the upper end face thereof is an arc-shaped surface which is concave downwards, a hemispherical fixing sleeve 2 is fixed on the lower side of the main connecting block 1, a sphere 3 is arranged in the fixing sleeve 2, the lower end of the sphere 3 extends out of the fixing sleeve 2 and is fixed with a guide cylinder 4, the cross section of the guide cylinder 4 is an elliptical shape, a plurality of supporting sheets 5 evenly distributed in the up-down direction are sleeved on the outer side of the guide cylinder 4, the projections of the plurality of supporting sheets 5 in the front-back direction can form a trapezoid which is larger at the top and smaller at the bottom, the projections of the supporting sheets 5 in the up-down direction are an elliptical shape, a threaded column 6 which is axially and rotatable at the top and the bottom is provided in the guide cylinder 4, an extension cylinder 7 is threadedly connected at the lower end of the threaded column 6, the lower end of the extension cylinder 7 passes through the guide cylinder 4 and extends out, a plurality of deformation holes 8 evenly distributed in the up-down direction and along the circumferential direction of the threaded column 6 are opened on the lower side of the guide cylinder 4, the material of the guide cylinder 4 at the deformation hole 8 is a deformable material, a slider 9 which is threadedly connected to the threaded column 6 is slidably connected to the inner side of the guide cylinder 4, and the lower side of the slider 9 is an inclined shape which is larger at the top and smaller at the bottom; A slide groove 10 connected to the deformation hole 8 is provided on the lower side of the slide cylinder. The lower end of the slider 9 can be inserted into the slide groove 10 and can push the lower side of the guide cylinder 4 to extend outward. A cushion block 11 is provided above the main connecting block 1. The lower end of the cushion block 11 is an ellipsoidal arc surface. A secondary connecting block 12 is provided above the cushion block 11. Insert blocks 13 are fixed on the left and right sides of the upper end of the cushion block 11. The insert block 13 is detachably connected to the secondary connecting block 12 and can slide up and down. Two bolts 14 opposite to each other are detachably connected to the upper side of the secondary connecting block 12. A positioning column 15 located between the two bolts 14 is fixed on the upper end of the secondary connecting block 12. Liquid replenishing holes 16 in the upper and lower directions are respectively provided on the positioning column 15, the bolt 14 and the threaded column 6. A plurality of leakage holes 17 that are evenly distributed along the upper and lower directions and pass through the left and right are respectively provided on the positioning column 15, the bolt 14 and the threaded column 6.

[0019] In order to prevent the sphere 3 from escaping from the fixing sleeve 2 , the diameter of the lower opening of the fixing sleeve 2 is smaller than the diameter of the sphere 3 .

[0020] In order to facilitate the control of the rotation of the threaded column 6, the upper end of the threaded column 6 is rotatably connected to the sphere 3, a transmission gear 18 is coaxially fixed on the upper side of the threaded column 6, and the front end of the uppermost support plate 5 is rotatably connected to a crown gear 19. The rear end of the crown gear 19 can engage with the transmission gear 18, and the front end of the crown gear 19 passes through the support plate 5.

[0021] In order to facilitate the connection between the control plug-in block 13 and the auxiliary connecting block 12, guide grooves 20 are respectively opened at the opposite ends of the two plug-in blocks 13. The two guide grooves 20 are inclined in shape with the front higher and the rear lower. The upper ends of the guide grooves 20 are connected to the outside. A moving block 21 located between the two plug-in blocks 13 is slidably connected in the auxiliary connecting block 12. Guide columns 22 inserted into the guide grooves 20 are respectively fixed at the left and right ends of the moving block 21.

[0022] In order to facilitate the sliding control of the moving block 21 and the rotation control of the crown gear 19, a transmission screw 23 is rotatably connected to the auxiliary connecting block 12, and the front end of the transmission screw 23 passes through the auxiliary connecting block 12. The front ends of the transmission screw 23 and the crown gear 19 are both provided with polygonal rotating holes 24.

[0023] In order to facilitate the application of bone cement at the positioning column 15, the cross-section of the movable block 21 is U-shaped, a connecting hole 25 that runs through the front and back is opened on the transmission screw 23, a through hole 26 is opened on the auxiliary connecting block 12, the lower side of the through hole 26 can be connected with the connecting hole 25 and the upper side can be connected with the fluid infusion hole 16 on the positioning column 15, and an external groove 27 with an opening facing forward is opened on the transmission screw 23, and the external groove 27 is connected with the rotating hole 24.

[0024] In order to facilitate the filling of bone cement at the bolt 14, a rectangular groove 28 with an opening facing upward is provided on the plug block 13, and the rectangular groove 28 can be connected to the fluid infusion groove on its corresponding side. Circular grooves 29 are respectively provided on the left and right sides of the front end of the auxiliary connecting block 12, and the circular grooves 29 are opened forward and the rear end is connected to the rectangular groove 28.

[0025] In order to facilitate the filling of bone cement in the threaded column 6, the interior of the sphere 3 is hollow, and the front and rear sides of the sphere 3 are respectively provided with front and rear through grooves 30. The front end of the main connecting block 1 is provided with an external groove 31, and the external groove 31 can be connected to the through groove 30 on the corresponding side. The aperture of the through groove 30 is larger than the aperture of the external groove 31, and the upper end of the fluid infusion groove on the threaded column 6 is connected to the interior of the sphere 3.

[0026] In order to limit the rotation between the fixing sleeve 2 and the spherical body 3, the fixing sleeve 2 and the spherical body 3 are respectively provided with a clamping groove 32, and the clamping groove 32 on the spherical body 3 is communicated with the interior thereof.

[0027] When the present invention is used, the projection size of the slide groove 10 in the up-down direction is set to be smaller than the projection size of the slide block 9 in the up-down direction. The patient's wrist is approached from the dorsal side, and a midline radial incision is made. The incision is made from 4 cm proximal to the radiocarpal joint to the midpoint of the third metacarpal bone, and the incision is made below the extensor retinaculum. The dorsal third extensor compartment is incised, and the extensor pollicis longus tendon (EPL) is exposed and retracted to the radial side; the radial extensor carpi tendon is exposed and retracted to the radial side, and the tendons in the dorsal first extensor compartment of the wrist are retracted from the distal end of the radius and protected; the tendons in the fourth and fifth extensor compartments are retracted to the ulnar side without opening their respective tendon sheaths. After the extensor tendons are separated and retracted to the radial and ulnar sides, the wrist joint capsule is cut longitudinally and retracted to both sides to expose the distal end of the radius, the entire wrist joint and the base of the third metacarpal bone; After the patient's carpal bones are exposed, the carpal bone resection guide is prevented, and two Kirschner wires are used to fix the capitate head and the third metacarpal metaphysis respectively. Then the radial bone resection guide is inserted, and the distal end of the radius is used to make a resection reference line. After positioning, the guide is removed, and the patient's carpal bones and radius are resected. After the resection is completed, positioning holes are drilled on the radius and carpal bones, and the preparation stage is completed. At this time, the number of support pieces 5 is controlled according to the length of the patient's radius resection. If the resection size is small, only the uppermost support piece 5 can be left as the end surface in contact with the radius. By inserting the guide cylinder 4 into the insertion hole drilled on the radius, the lower end of the uppermost support piece 5 is in contact with the resected end surface of the radius. Before inserting the guide cylinder 4, the extension cylinder 7 can be rotated to rotate the extension cylinder 7 relative to the threaded column 6 and slide downward relative to the guide cylinder 4 to extend the component inserted into the radius. In the present application, the extension cylinder 7 and the guide cylinder 4 have no connection relationship, but only a simple contact relationship. Therefore, the extension cylinder 7 can rotate in the guide cylinder 4 and slide downward, and the threaded column 6 can be prevented from rotating with the rotation of the extension cylinder 7 by only rotating the positioning crown gear 19. After the guide cylinder 4 on the main connecting block 1 is inserted into the drill hole of the radius, the positioning column 15 on the auxiliary connecting block 12 is inserted into the drill hole of the carpal bone. Before the auxiliary connecting block 12 is used, the transmission screw 23 can be rotated by cooperating with the rotating hole 24 through the wrench. The transmission screw 23 drives the moving block 21 to slide backward, and pushes the two plug blocks 13 to slide downward through the two guide columns 22 and the guide groove 20. The two plug blocks 13 drive the cushion block 11 to move downward. When the guide column 22 is removed from the guide groove 20, the plug block 13 is detached from the auxiliary connecting block 12, and then the cushion block 11 is taken out first. At this time, after the positioning column 15 of the auxiliary connecting block 12 is inserted into the drill hole of the carpal bone, the bolt 14 can be rotated by a screwdriver to rotate the two bolts 14 and insert them into the drill holes on both sides of the carpal bone. Through the threaded connection of the bolt 14, the drill hole itself is smaller than the hole diameter of the bolt 14, and the bolt 14 can also be drilled. When the bolt 14 is inserted into the drill hole, the auxiliary connecting block 12 is initially fixed. Then the insert block 13 on the cushion block 11 can be inserted into the lower side of the auxiliary connecting block 12, and at the same time, the guide column 22 on the moving block 21 can be inserted into the guide groove 20 of the insert block 13, and then the transmission screw 23 can be rotated in the opposite direction by the wrench, so that the transmission screw 23 drives the moving block 21 to move forward, and the moving block 21 drives the insert block 13 to slide upward through the guide column 22 and the guide groove 20, and then the insert block 13 drives the cushion block 11 to move upward, and by turning the wrench to rotate the transmission screw 23, the position of the cushion block 11 in the up and down direction can be controlled and adjusted; The main connection block 1 can be swung forward, backward, left, and right through the ball joint connection between the fixing sleeve 2 and the sphere 3. The medical staff can adjust the position of the main connection block 1 according to the angle of the radial resection end and the angle of the patient's wrist. At the same time, the position of the cushion block 11 in the up and down direction is adjusted so that the concave arc surface at the upper end of the main connection block 1 matches the arc ellipsoid surface at the lower end of the cushion block 11. After the position adjustment of the main connection block 1 and the cushion block 11 is completed, it is only necessary to use a wrench to rotate the lower rotating hole 24 to rotate the crown gear 19, and then the crown gear 19 drives the threaded column 6 to rotate through the transmission gear 18, and the rotation of the threaded column 6 drives the slider 9 to move downward, and the slider 9 moves downward and is inserted into the slide groove 10. Since the projection size of the slide groove 10 in the up and down direction is smaller than the projection size of the slider 9 in the up and down direction, the slider 9 pushes the lower side of the guide cylinder 4 to extend outward at this time, and since the deformation hole 8 is provided, the lower side of the guide cylinder 4 will not be interfered by the contact of its side wall when it is deformed outward by force, which is more conducive to its outward extension. At the same time, the side wall extending outward causes the end faces of the multiple support sheets 5 contacting the guide cylinder 4 to be squeezed, thereby preliminarily positioning the position of the support sheet 5, and the support sheet 5 is squeezed and slides upward, which will also make the support sheet 5 in close contact with the lower side of the sphere 3, and then the swing of the sphere 3 is preliminarily limited, and the side wall of the guide cylinder 4 extending outward contacts the side wall of the drill hole, and the position of the main connection block 1 is preliminarily positioned; At this time, the main connection block 1 and the auxiliary connection block 12 are both preliminarily positioned. At this time, the medical staff injects bone cement through a syringe, inserts the syringe into the external groove 27, the circular groove 29, and the external notch 31 in sequence, and then pushes out the bone cement. The bone cement flows into the liquid replenishing groove of the positioning column 15 through the external groove 27, the through groove, the connecting hole 25, and the through hole 26. At the same time, the bone cement flows out through the leakage groove of the positioning column 15, and the gap between the positioning column 15 and the drill hole is filled, and the connection gap between the transmission screw 23 and the moving block 21 is filled; At the same time, bone cement flows out from the liquid infusion hole 16 on the bolt 14 through the circular groove 29 and the rectangular groove 28, so that the gap between the bolt 14 and the drilled hole is filled, and the transmission gap between the rectangular groove 28 and the insert block 13 is also filled with bone cement. After the bone cement is cured, the auxiliary connecting block 12 and the cushion block 11 are effectively fixed; At the same time, bone cement flows into the interior of the sphere 3 through the outer notch 31 and the through groove 30, and at the same time flows out through the liquid replenishing groove of the threaded column 6, so that the gap between the guide cylinder 4 and the drill hole is filled, and at the same time the gap between the support plates 5 is supplemented. After the bone cement flows in, the slot 32 is filled with bone cement. After the bone cement is solidified, the bone cement in the slot 32 will limit the rotation between the fixing sleeve 2 and the sphere 3, completing the installation of the main connecting block 1 and the auxiliary connecting block 12.

[0028] The invention has an ingenious structure and is easy to use. By arranging the main connecting block, the auxiliary connecting block, the cushion block, the guide cylinder, the extension cylinder and the support plate, it is convenient for medical staff to control and adjust the angle and position of the prosthesis according to needs. Moreover, according to the different areas of the radius and carpal bone resected by each person during the specific operation, the position of the prosthesis can be adjusted to the correct position before the prosthesis is installed. The process is quick and convenient, and there is no need to repeatedly apply bone cement to the prosthesis connection and the connection between the prosthesis and the carpal bone and the radius during fixation. It is only necessary to quickly push the bone cement through the outer notch, the round groove and the external groove after positioning the position to complete the filling of the bone cement, so that the prosthesis components in the application are fixed while the prosthesis components are connected to the patient's bones. The operation saves time and effort, and effectively improves the surgical efficiency of medical staff. At the same time, for patients with more radius resection, the connection can be controlled to be extended and retracted. Through multiple fixing methods, the support effect at the patient's wrist joint is improved, and the stability during fixation is improved. The connection is more firm and the service life is longer. The structure is simple, the operation is convenient, the conception is novel, and the usability is strong.

Claims

1. An adjustable prosthesis, comprising a main connection block (1), characterized in that: The upper side of the main connection block (1) is inclined with the left side lower and the right side higher, and the upper end surface thereof is a downwardly concave arc surface. A hemispherical fixing sleeve (2) is fixed on the lower side of the main connection block (1). A sphere (3) is arranged in the fixing sleeve (2). The lower end of the sphere (3) extends out of the fixing sleeve (2) and is fixed with a guide cylinder (4). The cross section of the guide cylinder (4) is elliptical. A plurality of support sheets (5) are evenly distributed in the vertical direction and are sleeved on the outer side of the guide cylinder (4). The projections of the plurality of support sheets (5) in the front-back direction can form a trapezoid with a larger upper part and a smaller lower part. The projections of the support sheets (5) in the vertical direction are elliptical. The guide cylinder (4) is circular, and a threaded column (6) is provided in the guide cylinder (4) in an axial direction and can rotate in an upper and lower direction. The lower end of the threaded column (6) is threadedly connected to an extension cylinder (7). The lower end of the extension cylinder (7) passes through the guide cylinder (4) and extends out. A plurality of deformation holes (8) are opened on the lower side of the guide cylinder (4) in the upper and lower directions and are evenly distributed along the circumferential direction of the threaded column (6). The material of the guide cylinder (4) at the deformation holes (8) is a deformable material. A slider (9) threadedly connected to the threaded column (6) is slidably connected to the inner side of the guide cylinder (4), and the lower side of the slider (9) is in an inclined shape with a larger upper part and a smaller lower part. The lower side of the slide cylinder is provided with a slide groove (10) connected to the deformation hole (8), the lower end of the slider (9) can be inserted into the slide groove (10) and can push the lower side of the guide cylinder (4) to extend outward, a cushion block (11) is provided above the main connection block (1), the lower section of the cushion block (11) is an ellipsoidal arc surface, a secondary connection block (12) is provided above the cushion block (11), and plug blocks (13) are respectively fixed on the left and right sides of the upper end of the cushion block (11), and the plug block (13) is detachably connected to the secondary connection block (12) and can be moved upward The auxiliary connecting block (12) is slid downward, and two bolts (14) opposite to each other are respectively removed and connected on the upper side. A positioning column (15) located between the two bolts (14) is fixed on the upper end of the auxiliary connecting block (12). The positioning column (15), the bolt (14) and the threaded column (6) are respectively provided with liquid replenishing holes (16) in the upper and lower directions. The positioning column (15), the bolt (14) and the threaded column (6) are respectively provided with a plurality of liquid leakage holes (17) evenly distributed in the upper and lower directions and penetrating from left to right.

2. The adjustment prosthesis according to claim 1, characterized in that: The diameter of the lower opening of the fixing sleeve (2) is smaller than the diameter of the sphere (3).

3. The adjustment prosthesis according to claim 1, characterized in that: The upper end of the threaded column (6) is rotatably connected to the sphere (3), a transmission gear (18) is coaxially fixed to the upper side of the threaded column (6), the front end of the uppermost support plate (5) is rotatably connected to a crown gear (19), the rear end of the crown gear (19) can mesh with the transmission gear (18), and the front end of the crown gear (19) penetrates the support plate (5).

4. The adjustment prosthesis according to claim 1, characterized in that: The two insert blocks (13) are provided with guide grooves (20) at opposite ends thereof. The two guide grooves (20) are inclined with the front being higher and the rear being lower. The upper ends of the guide grooves (20) are connected to the outside. A moving block (21) located between the two insert blocks (13) is slidably connected in the auxiliary connection block (12). Guide posts (22) inserted into the guide grooves (20) are fixed at the left and right ends of the moving block (21).

5. The adjustment prosthesis according to claim 1, characterized in that: A transmission screw (23) is rotatably connected to the auxiliary connection block (12), the front end of the transmission screw (23) passes through the auxiliary connection block (12), and the front ends of the transmission screw (23) and the crown gear (19) are both provided with polygonal rotation holes (24).

6. The adjustment prosthesis according to claim 4, characterized in that: The cross section of the moving block (21) is U-shaped, the transmission screw (23) is provided with a connecting hole (25) which passes through from front to back, the auxiliary connecting block (12) is provided with a through hole (26), the lower side of the through hole (26) can be connected to the connecting hole (25) and the upper side can be connected to the liquid replenishing hole (16) on the positioning column (15), and the transmission screw (23) is provided with an external groove (27) which opens forward, and the external groove (27) is connected to the rotating hole (24).

7. The adjustment prosthesis according to claim 1, characterized in that: The insert block (13) is provided with a rectangular groove (28) with its opening facing upwards, and the rectangular groove (28) can be connected to the liquid replenishing groove on the corresponding side thereof. The front end left and right sides of the auxiliary connecting block (12) are respectively provided with circular grooves (29), and the circular grooves (29) are opened forwards and the rear end is connected to the rectangular groove (28).

8. The adjustment prosthesis according to claim 1, characterized in that: The interior of the sphere (3) is hollow, and front and rear sides of the sphere (3) are respectively provided with through grooves (30) that penetrate front and rear. The front end of the main connecting block (1) is provided with an outer notch (31), and the outer notch (31) can be connected to the through groove (30) on the corresponding side. The aperture of the through groove (30) is larger than the aperture of the outer notch (31), and the upper end of the liquid replenishing groove on the threaded column (6) is connected to the interior of the sphere (3).

9. The adjustment prosthesis according to claim 1, characterized in that: The fixing sleeve (2) and the spherical body (3) are respectively provided with a clamping groove (32), and the clamping groove (32) on the spherical body (3) is communicated with the interior thereof.

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