CN111616770A

CN111616770A - Tibia osteotomy positioning device

Info

Publication number: CN111616770A
Application number: CN202010435218.5A
Authority: CN
Inventors: 周海利
Original assignee: Tianyan Medical Equipment Co ltd
Current assignee: Tianyan Medical Equipment Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-09-04
Anticipated expiration: 2040-05-21
Also published as: CN111616770B

Abstract

The invention discloses a tibia osteotomy positioning device which comprises a support, wherein a twisting cap is arranged at one end of the support, a torsion spring is arranged in the twisting cap, a fixed pin penetrates through the twisting cap, a ratchet wheel is sleeved on the fixed pin, one end of the ratchet wheel is connected with a clamp, a pressure rod is arranged in the support, a guide block is arranged at the other end of the support, a round-head pin and a first button are arranged in the guide block, a connecting shaft is arranged at the other end of the guide block, a connecting block is arranged at the other end of the connecting shaft, a second button is arranged in the connecting block, a sleeve is arranged at the upper end of the connecting block, a positioning rod and a locking rod are arranged in the sleeve, a third button is arranged; the invention can accurately position and determine the interception angle of the tibial plateau retroinclination angle, and solves the error of determining the tibial plateau retroinclination angle by naked eyes in the artificial knee joint replacement operation.

Description

Tibia osteotomy positioning device

Technical Field

The invention relates to the field of artificial knee joint replacement, in particular to a tibia osteotomy positioning device.

Background

With the continuous development of medical technology, the artificial knee joint replacement operation has become one of the conventional treatment methods for treating knee joint pathological changes, and the clinical yield of over 10 years is more than 90% according to statistics. The artificial knee joint replacement surgery is to replace and reconstruct the damaged joint by the artificial knee joint so as to relieve symptoms, eliminate pain, recover and improve the joint function and improve the life quality, can obviously relieve or eliminate the symptoms of osteonecrosis, comminuted fracture dislocation, osteoarthropathy which can not be restored, pain and movement disorder, rheumatoid arthritis which is stiff or difficult to move and the like, improve the movement range of the joint to a certain extent, and obviously improve the appearance of deformed limbs. Nowadays, the artificial joint replacement technology has a short treatment course and an obvious pain removal effect, and is accepted by more and more doctors and patients. In the artificial knee joint replacement, firstly, the upper end of a tibia needs to be cut to obtain a tibial platform for installing an artificial prosthesis, the cutting angle of the tibial platform back inclination angle needs to be determined before cutting, the currently adopted method is to position the position of a tibial bone cutter according to an anterior cruciate ligament tibial dead center positioning method in an extramedullary positioning method, and the cutting angle of the tibial platform back inclination angle is determined according to visual observation and clinical experience in the operation, so that the existing method cannot accurately position and determine the cutting angle of the tibial platform back inclination angle, and has certain influence on the operation effect. The tibia osteotomy positioning device disclosed by the invention can accurately determine the osteotomy angle of the tibial plateau back inclination angle in the artificial knee joint replacement operation, reduces the risk of operation failure, has good guidance and simple operation, can realize disassembly and disinfection, is greatly convenient for a doctor to use, and reduces secondary injury to a patient.

Disclosure of Invention

The invention aims to provide a tibia osteotomy positioning device to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

a tibia osteotomy positioning device comprises a support, wherein the support is in a V-shaped opening shape and is used for placing an ankle in an operation, one end of the support is provided with a twisting cap which is of a hollow cylindrical structure with an opening at the lower end and is used for placing a torsional spring, the twisting cap is internally provided with the torsional spring, a fixed pin penetrates through the twisting cap, one end of the torsional spring is clamped in the fixed pin, the fixed pin is an elliptical cylinder and penetrates through the support and does not move relative to the support, a ratchet wheel is sleeved on the fixed pin and can rotate relative to the fixed pin, one end of the ratchet wheel is connected with a clamp, the clamp and the ratchet wheel are integrally formed, the clamp is used for assisting in clasping the ankle, a pressure rod is arranged in the support, the pressure rod is of a hollow structure and has certain elasticity, the other end of the support is provided with a guide block, the guide block is in sliding connection with the support, the round-head pin is a cylinder with smooth two ends, the first button is used for controlling the relative position between the guide block and the support, the other end of the guide block is provided with a connecting shaft which is used for assisting in adjusting the angle of the tibial osteotomy block relative to the tibial plateau, the support, the twist cap, the torsional spring, the ratchet wheel, the pressure bar, the guide block, the round-head pin, the first button and the connecting shaft jointly form the ankle embracing device, the other end of the connecting shaft is provided with a connecting block, the connecting shaft horizontally penetrates out of the connecting block, the second button is arranged in the connecting block and used for controlling the angle of the tibial osteotomy block relative to the tibial plateau, the upper end of the connecting block is provided with a sleeve, the sleeve is of a hollow structure, the positioning rod and the locking rod are arranged in the sleeve and used for assisting in adjusting the height of the tibial osteotomy guide, the upper end of the locking, sleeve, connecting block, No. two buttons, locating lever, check lock lever, No. three buttons have constituted the shin bone director of cutting jointly, the sleeve upper end is provided with No. four buttons, and No. four buttons are convenient fixed and are dismantled the shin bone piece, sleeve one end is provided with the shin bone piece of cutting, and the shin bone piece of cutting final definite shin bone platform's angle and height.

Preferably, turn round cap, torsional spring, fixed pin, ratchet, depression bar and all control two, the clip includes that a left side presss from both sides and the right side presss from both sides, and a left side presss from both sides the cooperation with the right side and cliies the ankle, the depression bar passes through cylindric lock and support swing joint, makes the depression bar rotate as the axle center along the cylindric lock, torsional spring one end cup joints on the fixed pin, the torsional spring other end is fixed in the clip root, and when a left side pressed from both sides and the right side pressed from both sides and open, the resilience force of torsional spring can press from both sides a left side and press from both sides the pull back with the right side, the one end that the depression bar is close the ratchet is provided with the dog, the dog overlap joint is on the ratchet, and the dog is used for fixed ratchet, then fixed left side.

Preferably, the support is in sliding connection with the guide block, one end, close to the round-head pin, of the support is provided with a plurality of round shallow grooves, the round shallow grooves are used for fixing the position of the round-head pin and then fixing the relative position of the support and the guide block, the distance between the round shallow grooves is 2.5mm, so that a reference adjustment amount is convenient for an operator to adjust the relative position of the support and the guide block, a round deep groove is formed in the first button, one end of the round-head pin is in contact with the round shallow grooves, the other end of the round-head pin is in contact with the first button, the first button can slide in the guide block, when the first button is pressed, the round-head pin enters the round deep groove and is far away from the round shallow grooves, the support and the guide block can slide, one end, exposed out of the guide block, of the first button is provided with a first spring, the first spring can be compressed by the first button for resetting of the first button, and one, the position on the guide block corresponding to the sliding groove is provided with a positioning pin, when the positioning pin is inserted into the sliding groove, the state of the first button can be fixed, and the relative position between the support and the guide block is further fixed.

Preferably, the guide block is provided with the pointer in the middle of being close to the one end of support, the support is close the one end of guide block and is provided with a plurality of scale with equidistant, interval between the scale is 5mm, and pointer and scale make things convenient for the art person to refer to the regulating variable.

Preferably, the connecting shaft penetrates through the connecting block and penetrates through the second button, the connecting shaft can slide in the connecting block and the second button, one end, exposed out of the connecting block, of the second button is provided with a second spring, the second spring can be compressed by the second button and is used for resetting the second button, the middle part, located in the connecting block, of the second button is provided with a sliding groove, a limiting rod is arranged on the connecting block at a position corresponding to the sliding groove, the limiting rod is lapped in the sliding groove, the sliding groove is driven to be downward when the second button is pressed down, the limiting rod limits the pressing height of the second button, the lower end, located in the connecting block, of the second button is provided with a thin rod, the thin rod is fixedly arranged at the lower end of the second button, the connecting shaft penetrates through the space between the thin rod and the second button, the lower end of the connecting shaft is provided with a first tooth, the thin rod is lapped with, when the second button is pressed, the thin rod is separated from the first tooth, and the connecting shaft and the second button can slide in the connecting block.

Preferably, the lower end of the positioning rod is fixedly connected with the connecting block, the positioning rod can slide in the sleeve, the height of the tibial osteotomy guider can be adjusted by sliding the positioning rod in the sleeve, the middle parts of the locking rod and the sleeve are connected through a rotating pin, the locking rod can rotate by taking the rotating pin as an axis, the positioning rod is provided with a second tooth at one end close to the locking rod, a third tooth at one end of the lower end of the locking rod close to the positioning rod, the second tooth and the third tooth are lapped, when the second tooth and the third tooth are separated, the positioning rod can slide up and down, the upper end of the locking rod passes through the third button, the third button is provided with a third spring at one end extending into the sleeve, a stop lever is arranged at the upper end of the sleeve to limit the upper end of the locking rod in the sleeve, the upper end of the locking rod and the stop lever can be kept away by pressing the third button, and third teeth and second teeth at the lower end of the locking rod are separated.

Preferably, No. four button lower extremes are provided with No. four springs, No. four buttons pass through the cylindric lock and sleeve upper end is articulated, and when pressing No. four buttons, the No. four button other end can the perk, one side that the sleeve upper end is close shin bone osteotomy piece is provided with the recess, the one end that No. four buttons are close the recess is provided with the strip arch, the recess lower extreme is provided with the bolt mouth, shin bone osteotomy piece is close telescopic one end and is provided with the lug, the lug upper end is provided with the strip recess, the lug lower extreme is provided with the bolt groove, recess and lug joint, the protruding and strip recess joint of strip, when pressing No. four buttons, the protruding and strip recess of strip breaks away from, bolt mouth and bolt groove pass through the bolt fixed, so can dismantle shin bone osteotomy piece and sleeve and be.

Preferably, the tibia osteotomy block comprises a left tibia osteotomy block, a right tibia osteotomy block and a middle tibia osteotomy block, a vertical groove, a fixed straight hole and a fixed inclined hole are formed in the tibia osteotomy block, a screw is driven into the vertical groove, the tibia osteotomy block and the human tibia can be relatively fixed, the height of the tibia osteotomy guide and the angle of the tibia osteotomy block can be adjusted according to needs, operation of a doctor is facilitated, the relative position between the tibia osteotomy block and the human tibia is reinforced by the fixed straight hole and the fixed inclined hole, displacement in an osteotomy process is prevented, a knife slot is further formed in the upper end of the tibia osteotomy block, and after the height, the angle and the stability between the tibia osteotomy block and the human tibia are determined, osteotomy can be performed.

Compared with the prior art, the invention has the beneficial effects that: the invention discloses a tibia osteotomy positioning device, which comprises an ankle holding device, a tibia cutting guide device, a tibia platform, a tibia block and a tibia platform, wherein the ankle holding device can automatically hold the ankle tightly according to the size, shape and size of the ankle of a patient and pre-fix the tibia of the patient; consequently can carry out accurate definite to the osteotomy angle at tibial plateau back inclination in the artifical knee joint replacement art, reduce the risk of operation failure, and this device guidance quality is good, and easy operation can realize dismantling the disinfection, and the very big doctor that has made things convenient for uses, reduces the probability to patient's secondary injury.

Drawings

FIG. 1 is a perspective view of a tibial osteotomy positioning device of the present invention;

FIG. 2 is a perspective view of the ankle hugger of the present invention;

FIG. 3 is a partial cross-sectional view of the ankle hugger of the present invention;

FIG. 4 is a partial perspective view of the ankle hugger of the present invention;

FIG. 5 is a partial cross-sectional view of the tibial resection guide of the present invention;

FIG. 6 is a detail view of part A of the present invention;

FIG. 7 is a partial cross-sectional view of the invention at B-B;

FIG. 8 is a perspective view of the left tibial osteotomy block of the present invention;

FIG. 9 is a perspective view of the right tibial osteotomy block of the present invention;

fig. 10 is a perspective view of a tibial resection block of the present invention.

Reference numerals: 1. a support; 2. twisting the cap; 3. a torsion spring; 4. a ratchet wheel; 5. a sleeve; 6. a pressure lever; 7. a guide block; 8. a round-head pin; 9. a first button; 10. a connecting shaft; 11. connecting blocks; 12. a second button; 13. positioning a rod; 14. a locking lever; 15. a third button; 16. a number four button; 17. a tibial osteotomy block; 18. a fixing pin; 19. a left clamp; 20. a right clamp; 21. a cylindrical pin; 22. a stopper; 23. a circular shallow groove; 24. a rotation pin; 25. a circular deep groove; 26. a first spring; 27. a chute; 28. positioning pins; 29. a pointer; 30. calibration; 31. a second spring; 32. a sliding groove; 33. a limiting rod; 34. a thin rod; 35. a first tooth; 36. a second tooth; 37. a third tooth; 38. a third spring; 39. a gear lever; 40. a fourth spring; 41. a cylindrical pin; 42. a groove; 43. strip-shaped bulges; 44. a bolt port; 45. a bump; 46. a strip-shaped groove; 47. a latch slot; 48. a knife entering groove; 49. a left tibial osteotomy block; 50. a right tibial osteotomy block; 51. a medial tibial osteotomy block; 52. a vertical slot; 53. fixing the straight hole; 54. and fixing the inclined hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): referring to fig. 1 to 10, the invention provides a tibia osteotomy positioning device, which comprises a bracket 1, wherein the bracket 1 is in a V-shaped open shape and is used for placing an ankle therein in an operation, a twist cap 2 is arranged at one end of the bracket 1, the twist cap 2 is in a hollow cylindrical structure with an open lower end, a torsion spring 3 is arranged in the hollow cylindrical structure, the torsion spring 3 is arranged in the twist cap 2, a fixing pin 18 penetrates through the twist cap 2, one end of the torsion spring 3 is clamped in the fixing pin 18, the fixing pin 18 is in an elliptical cylinder shape and penetrates through the bracket 1 without relative movement with the bracket 1, a ratchet 4 is sleeved on the fixing pin 18, the ratchet 4 and the fixing pin 18 can rotate relatively, one end of the ratchet 4 is connected with a clamp, the clamp and the ratchet 4 are integrally formed, the clamp is used for assisting in clasping the ankle, a press rod 6 is arranged in the bracket 1, the press rod 6, the guide block 7 is in sliding connection with the support 1, a round-head pin 8 and a first button 9 are arranged in the guide block 7, the round-head pin 8 is a cylinder with smooth two ends, the first button 9 is used for controlling the relative position between the guide block 7 and the support 1, a connecting shaft 10 is arranged at the other end of the guide block 7, the connecting shaft 10 is used for assisting in adjusting the angle of the tibial osteotomy block relative to the tibial plateau, the support 1, the twist cap 2, the torsion spring 3, the ratchet 4, the pressure lever 6, the guide block 7, the round-head pin 8, the first button 9 and the connecting shaft 10 jointly form an ankle embracing device, a connecting block 11 is arranged at the other end of the connecting shaft 10, the connecting shaft 10 horizontally penetrates through the connecting block 11, a second button 12 is arranged in the connecting block 11, the second button 12 is used for controlling the angle of the tibial osteotomy block relative to the tibial plateau, a sleeve 5 is arranged at the upper, locating lever 13 and check lock 14 are used for the height of auxiliary adjustment shin bone cutting director, the check lock 14 upper end is provided with No. three button 15, No. three button 15 is used for controlling the height of shin bone cutting director, sleeve 5, connecting block 11, No. two buttons 12, locating lever 13, the check lock 14, No. three button 15 has constituted shin bone cutting director jointly, sleeve 5 upper end is provided with No. four button 16, No. four button 16 conveniently fixes and dismantles shin bone cutting piece, sleeve 5 one end is provided with shin bone cutting piece 17, the angle and the height of shin bone cutting piece final definite shin bone platform.

Twist cap 2, torsional spring 3, fixed pin 18, ratchet 4, depression bar 6 all has about two, the clip includes that a left side presss from both sides 19 and right side and presss from both sides 20, a left side presss from both sides 19 and right side and presss from both sides 20 cooperation and clip the ankle, depression bar 6 passes through cylindric lock 21 and support 1 swing joint, make depression bar 6 can rotate as the axle center along cylindric lock 21, 3 one end of torsional spring cup joints on fixed pin 18, the torsional spring 3 other end is fixed in the clip root, when a left side presss from both sides 19 and right side and presss from both sides 20 and open, the resilience force of torsional spring 3 can press from both sides 19 and right side and press from both sides 20 and pull back, the one end that depression bar 6 is close ratchet 4 is provided with dog 22, dog 22 overlap joint is on ratchet 4, dog 22 is used for fixed ratchet 4, then fixed left side presss from both sides 19 and right side and presss.

The support 1 is in sliding connection with the guide block 7, one end of the support 1 close to the round-head pin 8 is provided with a plurality of round shallow grooves 23, the round shallow grooves 23 are used for fixing the position of the round-head pin 8, then the relative position of the support 1 and the guide block 7 is fixed, the distance between the round shallow grooves 23 is 2.5mm, a reference adjustment amount is convenient for an operator to adjust the relative position of the support 1 and the guide block 7, a round deep groove 25 is arranged on a first button 9, one end of the round-head pin 8 is in contact with the round shallow grooves 23, the other end of the round-head pin 8 is in contact with the first button 9, the first button 9 can slide in the guide block 7, when the first button is pressed, the round-head pin 8 enters the round deep groove 25, the round shallow grooves 23 are far away from the round shallow grooves, the support 1 and the guide block 7 can slide, one end of the first button 9, which is exposed out of the guide block 7, is provided with a first spring, one end of the first button 9, which is far away from the first spring 26, is provided with a sliding groove 27, a positioning pin 28 is arranged on the guide block 7 at a position corresponding to the sliding groove 27, and when the positioning pin 28 is inserted into the sliding groove 27, the state of the first button 9 can be fixed, and further the relative position between the support 1 and the guide block 7 can be fixed.

The middle of one end of the guide block 7 close to the support 1 is provided with a pointer 29, one end of the support 1 close to the guide block 7 is provided with a plurality of scales 30 at equal intervals, the interval between the scales 30 is 5mm, and the pointer 29 and the scales 30 facilitate reference of an operator for adjustment.

The connecting shaft 10 penetrates through the connecting block 11 and penetrates through the second button 12, the connecting shaft 10 can slide in the connecting block 11 and the second button 12, one end, exposed out of the connecting block 11, of the second button 12 is provided with a second spring 31, the second spring 31 can be compressed by the second button 12 and is used for resetting the second button 12, the middle part, located in the connecting block 11, of the second button 12 is provided with a sliding groove 32, a limiting rod 33 is arranged on the connecting block 11 and in a position corresponding to the sliding groove 32, the limiting rod 33 is lapped in the sliding groove 32, the sliding groove 32 is driven to move downwards when the second button 12 is pressed downwards, the limiting rod 33 limits the pressing height of the second button 12, the lower end, located in the connecting block 11, of the second button 12 is provided with a thin rod 34, the thin rod 34 is fixedly arranged at the lower end of the second button 12, the connecting shaft 10 penetrates between the thin rod 34 and the second button 12, the lower end of the, the thin rod 34 is overlapped with the first tooth 35, the thin rod 34 is separated from the first tooth 35 when the second button 12 is pressed, and both the connecting shaft 10 and the second button 12 can slide in the connecting block 11.

The lower end of a positioning rod 13 is fixedly connected with a connecting block 11, the positioning rod 13 can slide in a sleeve 5, the positioning rod 13 can slide in the sleeve 5 to adjust the height of the tibial osteotomy guider, a locking rod 14 is connected with the middle part of the sleeve 5 through a rotating pin 24, the locking rod 14 can rotate by taking the rotating pin 24 as an axis, one end of the positioning rod 13 close to the locking rod 14 is provided with a second tooth 36, one end of the lower end of the locking rod 14 close to the positioning rod 13 is provided with a third tooth 37, the second tooth 36 is overlapped with the third tooth 37, when the second tooth 36 is separated from the third tooth 37, the positioning rod 13 can slide up and down, the upper end of the locking rod 14 passes through a third button 15, one end of the third button 15 extending into the sleeve 5 is provided with a third spring 38, the upper end of the sleeve 5 is provided with a baffle rod 39 to limit the upper end of the locking rod 14 in the sleeve 5, and the upper end of the baffle, the third tooth 37 and the second tooth 36 at the lower end of the locking bar 14 are separated.

Four number 16 lower extremes of button are provided with four number spring 40, four number 16 is articulated through cylindric lock 41 and sleeve 5 upper end, when pressing four number 16, the four number 16 other end can the perk, one side that sleeve 5 upper end is close shin bone osteotomy piece 17 is provided with recess 42, the one end that four number 16 is close to recess 42 is provided with strip arch 43, the recess 42 lower extreme is provided with bolt mouth 44, the one end that shin bone osteotomy piece 17 is close to sleeve 5 is provided with lug 45, lug 45 upper end is provided with strip recess 46, lug 45 lower extreme is provided with bolt groove 47, recess 42 and lug 45 joint, strip arch 43 and strip recess 46 joint, when pressing four number 16, strip arch bolt 43 and strip recess 46 break away from, bolt mouth 44 and bolt groove 47 pass through the bolt is fixed, so can dismantle the connection with shin bone osteotomy piece and sleeve 5.

The tibia osteotomy block 17 comprises a left tibia osteotomy block 49, a right tibia osteotomy block 50 and a middle tibia osteotomy block 51, wherein a vertical groove 52, a fixed straight hole 53 and a fixed inclined hole 54 are formed in the tibia osteotomy block 17, screws are arranged in the vertical groove 52, the tibia osteotomy block 17 and the human tibia can be relatively fixed, the height of the tibia osteotomy guide and the angle of the tibia osteotomy block 17 can be adjusted according to needs, operation of a doctor is facilitated, the fixed straight hole 53 and the fixed inclined hole 54 reinforce the relative position between the tibia osteotomy block 17 and the human tibia and prevent displacement in the osteotomy process, a cutter inserting groove 48 is further formed in the upper end of the tibia osteotomy block 17, and after the height, the angle and the stability between the tibia osteotomy block and the human tibia are determined, the cutter block extends into the cutter inserting groove 48 to perform osteotomy.

The working principle of the invention is as follows: before the osteotomy of the artificial knee joint replacement operation, the device needs to be installed on a human body to determine the osteotomy angle of the tibial plateau back inclination angle, and the specific method comprises the following steps:

firstly, clasping the ankle: firstly, manually opening the left clamp 19 and the right clamp 20, driving the ratchet wheel 4 to rotate, enabling the torsion spring 3 to be compressed and deformed, under the clamping action of the ratchet wheel 4 and the stop block 22, keeping the left clamp 19 and the right clamp 20 in an open state after being opened, then enabling the ankle of the shin of a human body to enter the ankle embracing device to give pressure to the guide block 6, enabling the guide block 6 to rotate along the cylindrical pin 21, enabling the stop block 22 and the ratchet wheel 4 to be loosened, driving the left clamp 19 and the right clamp 20 to be closed by the resilience force of the torsion spring 3 until the teeth of the ratchet wheel 4 are clamped with the stop block 22 again, and thus the ankle embracing device can automatically lock the ankle;

secondly, adjusting the ankle holding device: the first button 9 is manually pressed, the first spring 26 is compressed, one end of the round-head pin 8 falls into the round deep groove 25, the other end of the round-head pin 8 is separated from the round shallow groove 23, the support 1 and the guide block 7 can slide, a doctor can adjust the position between the support 1 and the guide block 7 left and right according to the pointer 29 and the scales 30, the first button 9 is loosened after adjustment is completed, the first spring 26 rebounds to separate one end of the round-head pin 8 from the round deep groove 25, the other end of the round-head pin falls into the round shallow groove 23, the support 1 and the guide block 7 are fixed again, and adjustment of the ankle holding device is completed;

thirdly, adjusting the height of the tibial osteotomy guide: the third button 15 is pressed, the third spring 38 is compressed, the locking rod 14 and the blocking rod 39 are separated, the locking rod 14 rotates along the rotating pin 24, the second tooth 36 and the third tooth 37 are separated, the positioning rod 13 can slide in the sleeve 5, the positioning rod 13 is adjusted as required, the height of the tibial osteotomy guide is adjusted, after the adjustment is completed, the third button 15 is released, the spring 38 rebounds to enable the locking rod 14 and the blocking rod 39 to abut against each other, the second tooth 36 and the third tooth 37 at the lower end of the locking rod 14 are locked again, and the height adjustment of the tibial osteotomy guide is completed;

fourthly, adjusting the angle of the tibial osteotomy block: the second button 12 is pressed, the second spring 31 is compressed, the sliding groove 32 moves downwards along the limiting rod 33, the thin rod 34 is separated from the first tooth 35, the horizontal position of the connecting shaft 10 can be adjusted, the included angle between the tibial osteotomy block 17 and the tibial plane is adjusted, the second button 12 is loosened after adjustment is completed, the second spring 31 rebounds, the sliding groove 32 moves upwards along the limiting rod 33, the thin rod 34 is clamped with the first tooth 35 again, and the angle adjustment of the tibial osteotomy block is completed;

fifthly, fixing the tibial osteotomy block: and (3) screwing in the vertical groove 52 to relatively fix the tibia osteotomy block 17 and the human tibia, adjusting the height of the tibia osteotomy guide and the angle of the tibia osteotomy block again according to requirements, screwing in the fixed straight hole 53 and the fixed inclined hole 54 after adjustment is finished, and reinforcing the position between the tibia osteotomy block 17 and the human tibia to prevent looseness.

Therefore, the osteotomy angle of the tibial plateau back dip angle is accurately determined.

If need dismantle the washing to this device, can press No. two buttons 12, dismantle the washing with the ankle device, can press No. four buttons 16, make No. four spring 40 compressed, No. four button 16 rotates along cylindric lock 41, and strip arch 43 and strip recess 46 separate, take off the bolt in bolt mouth 44 and the bolt groove 47, dismantle the washing with shin bone osteotomy piece 17, wash the shin bone osteotomy director at last.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A tibia osteotomy positioning device comprises a bracket (1), and is characterized in that: the improved structure is characterized in that a torsion cap (2) is arranged at one end of the support (1), a torsion spring (3) is arranged in the torsion cap (2), a fixing pin (18) penetrates through the fixing pin (2), a ratchet (4) is sleeved on the fixing pin (18), one end of the ratchet (4) is connected with a clamp, a pressure lever (6) is arranged in the support (1), a guide block (7) is arranged at the other end of the support (1), a round-head pin (8) and a first button (9) are arranged in the guide block (7), a connecting shaft (10) is arranged at the other end of the guide block (7), a connecting block (11) is arranged at the other end of the connecting shaft (10), a second button (12) is arranged in the connecting block (11), a sleeve (5) is arranged at the upper end of the connecting block (11), a positioning rod (13) and a locking rod (14) are arranged in the, sleeve (5) upper end is provided with No. four button (16), sleeve (5) one end is provided with shin bone osteotomy piece (17).

2. The tibial resection positioning device of claim 1, wherein: turn round cap (2), torsional spring (3), fixed pin (18), ratchet (4), depression bar (6) and all have about two, the clip includes that a left side presss from both sides (19) and right side clamp (20), depression bar (6) are through cylindric lock (21) and support (1) swing joint, torsional spring (3) one end cup joints on fixed pin (18), the torsional spring (3) other end is fixed in the clip root, the one end that depression bar (6) is close ratchet (4) is provided with dog (22), dog (22) overlap joint is on ratchet (4), fixed pin (18) are oval column structure.

3. The tibial resection positioning device of claim 1, wherein: support (1) and guide block (7) sliding connection, the one end that support (1) is close button round pin (8) is provided with the circular shallow slot (23) of a plurality of, distance between circular shallow slot (23) is 2.5mm, be provided with circular deep trouth (25) on button (9), button round pin (8) one end and circular shallow slot (23) contact, the contact of button round pin (8) other end and button (9), button (9) can slide in guide block (7), the one end that a button (9) exposes guide block (7) is provided with spring (26), the one end that a spring (26) was kept away from to button (9) is provided with spout (27), the position corresponding with spout (27) is provided with locating pin (28) on guide block (7).

4. The tibial resection positioning device of claim 1, wherein: pointer (29) are provided with in the middle of guide block (7) is close the one end of support (1), the one end that guide block (7) are close in support (1) is equidistant to be provided with a plurality of scale (30), the interval between scale (30) is 5 mm.

5. The tibial resection positioning device of claim 1, wherein: connecting axle (10) pass in connecting block (11) to pass in No. two button (12), No. two button (12) expose the one end of connecting block (11) and be provided with No. two spring (31), No. two button (12) are located the middle part of connecting block (11) and are provided with sliding tray (32), be provided with gag lever post (33) with sliding tray (32) corresponding position on connecting block (11), No. two button (12) are located the lower extreme of connecting block (11) and are provided with pin (34), connecting axle (10) lower extreme is provided with tooth (35) No. one, pin (34) and tooth (35) overlap joint, connecting axle (10) and No. two button (12) all can slide in connecting block (11).

6. The tibial resection positioning device of claim 1, wherein: locating lever (13) lower extreme and connecting block (11) fixed connection, locating lever (13) can slide in sleeve (5), lock lever (14) and sleeve (5) middle part are passed through rotating pin (24) and are connected, locating lever (13) are close to lock lever (14) one end and are provided with No. two tooth (36), the one end that lock lever (14) lower extreme is close to locating lever (13) is provided with No. three tooth (37), No. two tooth (36) and No. three tooth (37) overlap joint, lock lever (14) upper end is passed in No. three button (15), the one end that No. three button (15) stretched into in sleeve (5) is provided with No. three spring (38), sleeve (5) upper end sets up shelves pole (39) and restricts lock lever (14) upper end in sleeve (5).

7. The tibial resection positioning device of claim 1, wherein: a fourth spring (40) is arranged at the lower end of the fourth button (16), the fourth button (16) is hinged with the upper end of the sleeve (5) through a cylindrical pin (41), a groove (42) is arranged on one side of the upper end of the sleeve (5) close to the tibia cutting block (17), a strip-shaped bulge (43) is arranged at one end of the fourth button (16) close to the groove (42), a bolt opening (44) is arranged at the lower end of the groove (42), a lug (45) is arranged at one end of the tibial osteotomy block (17) close to the sleeve (5), the upper end of the lug (45) is provided with a strip-shaped groove (46), the lower end of the lug (45) is provided with a pin slot (47), recess (42) and lug (45) joint, strip arch (43) and strip recess (46) joint, bolt mouth (44) and bolt groove (47) are fixed through the bolt.

8. The tibial resection positioning device of claim 1, wherein: the tibia osteotomy block (17) comprises a left tibia osteotomy block (49), a right tibia osteotomy block (50) and a middle tibia osteotomy block (51), a vertical groove (52), a fixed straight hole (53) and a fixed inclined hole (54) are formed in the tibia osteotomy block (17), and a knife entering groove (48) is further formed in the upper end of the tibia osteotomy block (17).