CN214712687U

CN214712687U - Single-side lead screw adjusting type bone cutting device for femoral condyle

Info

Publication number: CN214712687U
Application number: CN202120173214.4U
Authority: CN
Inventors: 贾京亮; 李建东; 王东林
Original assignee: Beijing Lidakang Technology Co Ltd
Current assignee: Beijing Lidakang Technology Co Ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-11-16
Anticipated expiration: 2031-01-21

Abstract

The utility model relates to a femur condyle unilateral lead screw regulation type osteotomy device, which relates to the technical field of medical appliances and comprises a main body, a movable body and a regulating component, wherein the movable body comprises a shell and a lower supporting plate connected with the rear side of the shell, an installation cavity for installing the regulating component is arranged in the shell, the main body comprises an upper supporting plate just opposite to and parallel to the lower supporting plate and two guide plates which are vertically arranged and parallel to each other and connected with the front end of the upper supporting plate, and the two guide plates are respectively movably connected with the left side and the right side of the shell; two the slope slot hole of symmetry is seted up to the deflector, adjusting part has two fore-and-aft direction and removes and insert the uide pin of two slope slot holes respectively, two the uide pin back-and-forth movement is to slope slot hole inner wall application of force, promotes two deflector slides from top to bottom relatively of casing to adjust the distance of bottom suspension fagging and last backup pad. This application has that the specification is adjustable, convenient to use's effect.

Description

Single-side lead screw adjusting type bone cutting device for femoral condyle

Technical Field

The application relates to the field of medical equipment, in particular to a femoral condyle unilateral screw adjusting type osteotomy device.

Background

The unicondylar joint replacement surgery has the advantages of small wound, quick recovery, bone retention, good joint stability and the like, retains the motion function of the knee joint of a patient to the maximum extent on the premise of not damaging the original proprioception and soft tissue balance system of the knee joint of the patient, and improves the satisfaction degree of the patient on the rehabilitation quality. The precision required by the unicondylar joint replacement technology is relatively high, and clinical studies prove that the accuracy of the installation position of the prosthesis directly influences the survival rate of the prosthesis. The accuracy of the osteotomy position directly affects the accuracy of the placement of the prosthesis, so that it is crucial in the unicondylar replacement surgery whether the osteotomy position and angle are accurate.

In the existing stage of the unicondylar replacement surgery, the common process is to firstly perform tibial osteotomy and then perform femoral osteotomy by referring to a tibial osteotomy surface. When the distal femur osteotomy is carried out, because the tibia side has already finished the osteotomy, the knee joint is in the clearance lax state, in order to reach the distal femur osteotomy and the tibia osteotomy surface are parallel, the tibia side and the femur side must be stably supported through a supporting block according to the actual extension clearance of the knee joint of a patient, and then the osteotomy guide plate is fixed according to the tibia osteotomy surface to carry out the osteotomy.

In view of the above-mentioned related technologies, the inventor believes that the specification of the supporting block cannot be adjusted, and the supporting block with different specifications needs to be selected according to the actual gap size at the knee joint of the patient, which causes the problem of inconvenient use.

SUMMERY OF THE UTILITY MODEL

To the inconvenient problem of supporting shoe use among the present unicondylar joint replacement operation, this application provides a thighbone condyle unilateral lead screw regulation type cuts bone device.

The application provides a thighbone condyle unilateral lead screw regulation type cuts bone device adopts following technical scheme:

thighbone condyle unilateral lead screw regulation type cuts bone device, its characterized in that: the movable body comprises a shell and a lower supporting plate connected to the rear side of the shell, an installation cavity for installing the adjusting assembly is formed in the shell, the main body comprises an upper supporting plate which is right opposite to and parallel to the lower supporting plate and two guide plates which are vertically arranged and parallel to each other and connected to the front end of the upper supporting plate, and the two guide plates are movably connected to the left side and the right side of the shell respectively;

two the slope slot hole of symmetry is seted up to the deflector, adjusting part has two fore-and-aft direction and removes and insert the uide pin of two slope slot holes respectively, two the uide pin back-and-forth movement is to slope slot hole inner wall application of force, promotes two deflector slides from top to bottom relatively of casing to adjust the distance of bottom suspension fagging and last backup pad.

Through adopting above-mentioned technical scheme, during the operation, earlier cut the bone to the shin bone side of patient knee joint department, then stretch into the space between shin bone and the thighbone with bottom suspension fagging and last backup pad, the osteotomy face of bottom suspension fagging butt shin bone, go up backup pad butt thighbone, the action of the regulating assembly of controlling again, make two uide pin fore-and-aft directions of regulating assembly remove, and through the application of force to slope slot hole inner wall, promote the deflector of casing both sides and slide from top to bottom, two deflectors move the bottom suspension fagging and reciprocate, adjust the distance between bottom suspension fagging and the last backup pad, thereby strut the space between shin bone side and the thighbone side, adjustable support knee joint clearance has been realized, adaptation patient's actual clearance size that can be nimble.

Optionally, the main part is still including connecting the extension in two deflector tops, the extension is offered and is used for the direction to cut the guiding hole of bone instrument, guiding hole is on a parallel with go up the backup pad.

Through adopting above-mentioned technical scheme, guiding hole is on a parallel with upper supporting plate, so be on a parallel with the lower bolster, the lower bolster butt and be on a parallel with the osteotomy face of shin bone side after the installation, so guiding hole is on a parallel with the osteotomy face of shin bone side for the section that the osteotomy instrument was cut at the thighbone side is on a parallel with the section of shin bone side, realizes supporting gap function and cuts the bone guide orientation function and unites two into one.

Optionally, the adjusting assembly includes an adjusting screw and an adjusting ring sleeved on the adjusting screw, two ends of the adjusting screw are rotatably connected to the front side and the rear side of the housing, a spiral guide groove is formed in the circumferential surface of the adjusting screw, a slider matched with the spiral guide groove is arranged on the inner side of the adjusting ring, the two guide pins are respectively and fixedly connected to two sides of the adjusting ring, elongated slots extending in the front-rear direction and communicated with the mounting cavity are respectively formed in the left side and the right side of the housing, and the two guide pins respectively extend out of the elongated slots on the two sides and move back and forth along the elongated slots.

By adopting the technical scheme, the elongated slots on the left side and the right side of the shell can limit the movement of the two guide pins of the two adjusting assemblies, the adjusting screw rod is rotated, the spiral guide groove applies force to the sliding block of the adjusting ring, and the adjusting ring moves back and forth along the adjusting screw rod under the limitation of the elongated slots, so that the two guide pins move along the elongated slots and then further drive the two guide plates to slide up and down.

Optionally, a flange is arranged on the adjusting screw rod, a plurality of positioning grooves are distributed on the circumferential surface of the flange in a surrounding manner, a blind hole communicated with the installation cavity is formed in the shell, and an elastic positioning piece elastically clamped with any one positioning groove is installed in the blind hole.

By adopting the technical scheme, the elastic positioning piece is elastically clamped with the positioning groove, so that the rotation angle of the adjusting screw rod can be elastically limited, the stopping of the adjusting screw rod at the set position is realized, the control on the adjusting range is facilitated, and the adjusting screw rod can be prevented from being reversed.

Optionally, the elastic positioning element includes a positioning spring and a ball, and the positioning spring pushes the ball to abut against the inside of the positioning groove.

Through adopting above-mentioned technical scheme, positioning spring and ball can provide suitable damping, make accommodate the lead screw rotate easily.

Optionally, an installation hole communicated with the installation cavity is formed in the rear side of the shell, the rear ends of the two elongated slots on the two sides of the shell are communicated with the installation hole, a sealing plate is fixedly connected to the installation hole, and a rear hole for installing the rear end of the adjusting screw rod is formed in the middle of the sealing plate.

Through adopting above-mentioned technical scheme, the dress hole is convenient in installing adjusting part to the installation cavity, fixes the shrouding and can prevent adjusting part from breaking away from the installation cavity in the dress hole, and the through-hole of shrouding can support accommodate the lead screw's rear end.

Optionally, a front hole communicated with the installation cavity is formed in the front side of the shell and is a circular through hole, the front end of the adjusting screw rod is rotatably connected to the front hole, and a jack with an edge is formed in the center of the end face of the front end of the adjusting screw rod.

Through adopting above-mentioned technical scheme, accommodate the lead screw's front end exposes from the front opening, and the jack is used for the cooperation to peg graft the spanner that has the edge, can rotate accommodate the lead screw through the spanner.

Optionally, the front side of the shell is provided with annularly distributed scales at the edge of the front hole, and the end face of the front end of the adjusting screw rod is provided with position marks.

By adopting the technical scheme, the distance between the lower supporting plate and the upper supporting plate can be read according to the position relation between the position mark and the scale.

Optionally, the marginal edge all is provided with the chimb around the left front and back edge of casing and the right side, two the deflector joint respectively between two chimbs of homonymy, and slide along the chimb.

Through adopting above-mentioned technical scheme, the chimb of casing left and right sides can lead the removal of two deflectors.

Optionally, the extension part is provided with a nail hole, and the nail hole is a through hole and parallel to the guide through hole.

Through adopting above-mentioned technical scheme, the nail hole is used for wearing to establish the staple, with main part fixed connection on the thighbone, improves stability, and the main part is difficult to rock when cutting the thighbone to guarantee to cut the accuracy of bone size.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the lower supporting plate and the upper supporting plate support a gap between the tibia side and the femur side, and the distance between the tibia side and the femur side can be adjusted through the adjusting assembly, so that the adjustable gap for supporting the knee joint is realized, and the actual gap size of a patient can be flexibly adapted;

2. the guide through hole can guide the osteotomy tool, so that the functions of supporting the gap and guiding and positioning the osteotomy are integrated;

3. the elastic positioning piece is elastically clamped with the positioning groove, so that the rotation angle of the adjusting knob can be elastically limited, and the control on the adjusting range is facilitated.

Drawings

FIG. 1 is a schematic overall structure diagram of a femoral condyle unilateral screw adjustment type osteotomy device;

FIG. 2 is an exploded view of a femoral condyle unilateral lead screw adjustment osteotomy device;

FIG. 3 is a cross-sectional view of a femoral condyle unilateral lead screw adjustment osteotomy device.

Description of reference numerals: 1. a main body; 11. an extension portion; 111. a guide through hole; 112. nailing holes; 113. a weight reduction groove; 12. an upper support plate; 13. a guide plate; 131. the long hole is inclined; 2. a movable body; 21. a housing; 211. a mounting cavity; 212. a long groove; 213. a front aperture; 214. installing into the hole; 215. a convex edge; 216. calibration; 217. blind holes; 218. a spring mounting hole; 22. a lower support plate; 23. closing the plate; 231. a rear aperture; 3. an adjustment assembly; 31. adjusting the screw rod; 311. a spiral guide groove; 312. a jack; 313. position marking; 314. a flange; 315. positioning a groove; 32. an adjusting ring; 321. a slider; 322. a guide pin; 4. an elastic positioning member; 41. a positioning spring; 42. and a ball.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses a single-side lead screw adjusting type osteotomy device for femoral condyle. Referring to fig. 1, the femoral condyle unilateral screw adjustment type osteotomy device comprises a main body 1, a movable body 2 movably connected with the main body 1, and an adjustment assembly 3 installed inside the main body 1.

Referring to fig. 1 and 2, the movable body 2 includes a housing 21 and a lower support plate 22, the housing 21 has a square structure, a mounting cavity 211 for mounting the adjusting assembly 3 is formed in the housing 21, the lower support plate 22 is transversely disposed, one end of the lower support plate is connected to the rear side of the housing 21, the lower support plate 22 and the housing 21 are integrally formed, and top surfaces of the lower support plate and the housing are flush. The main body 1 includes an extension 11 disposed above the housing 21, an upper support plate 12 connected to a rear side of the extension 11, and two guide plates 13 connected below the extension 11, and the extension 11, the upper support plate 12, and the two guide plates 13 are integrally formed. Go up backup pad 12 and be located bottom suspension fagging 22 top and parallel with bottom suspension fagging 22, two vertical settings of deflector 13 and be parallel to each other, two deflectors 13 are located the left and right sides of casing 21 respectively.

Referring to fig. 1, the extension 11 is formed with a guide through hole 111, and the guide through hole 111 is parallel to the upper support plate 12 and is adjacent to the two guide plates 13, so as to guide the osteotomy saw blade. The extending portion 11 is further provided with a plurality of nail holes 112, and the plurality of nail holes 112 are located above the guiding through hole 111, are through holes, are parallel to the guiding through hole 111, and are used for penetrating and installing fixing nails. The number of the nail holes 112 can be three, the nail holes are distributed in a triangular shape, and weight reduction grooves 113 can be formed among the three nail holes 112, so that the weight is reduced.

During the operation, cut the bone to the shin bone side of patient's knee joint department earlier, then stretch into the space between shin bone and the thighbone with bottom suspension fagging 22 and last backup pad 12, make the osteotomy face of bottom suspension fagging 22 butt shin bone, go up backup pad 12 butt thighbone, prop open the space between shin bone and the thighbone, use the staple to pass nail hole 112 and fix extension 11 on the thighbone, then stretch into along guiding through hole 111 with cutting the bone saw bit, cut the thighbone, guiding through hole 111 is on a parallel with last backup pad 12, so be on a parallel with bottom suspension fagging 22, make the osteotomy face of thighbone be on a parallel with the osteotomy face of shin bone.

Referring to fig. 2 and 3, the adjusting assembly 3 is used for adjusting the distance between the lower support plate 22 and the upper support plate 12, and includes an adjusting screw 31 and an adjusting ring 32 sleeved on the adjusting screw 31, the adjusting screw 31 is transversely disposed, and two ends of the adjusting screw are respectively rotatably connected to the front side and the rear side of the housing 21, a spiral guide slot 311 having a spiral structure is disposed on the circumferential surface of the adjusting screw 31, a slider 321 matched with the spiral guide slot 311 is fixedly connected to the inner side of the adjusting ring 32, and the slider 321 slides along the spiral guide slot 311. Two guide pins 322 are fixedly connected to the outer side of the adjusting ring 32, and the two guide pins 322 respectively face the left and right sides of the housing 21. The left side and the right side of the housing 21 are respectively provided with a long groove 212 extending in the front-back direction, the long groove 212 is communicated with the mounting cavity 211, the two guide pins 322 respectively extend out of the two long grooves 212, and the long grooves 212 can limit the rotation of the adjusting ring 32.

Referring to fig. 1 and 3, a front hole 213 is formed in the front side of the housing 21, the front hole 213 is a circular hole and is communicated with the mounting cavity 211, the front end of the adjusting screw rod 31 is rotatably connected in the front hole 213, the front end of the adjusting screw rod 31 is flush with the front side of the housing 21, an insertion hole 312 with an edge is formed in the middle of the front end, the insertion hole 312 can be a six-edge insertion hole 312, a hexagonal wrench can be used to be matched with the insertion hole 312, and the adjusting screw rod 31 can be rotated conveniently.

Referring to fig. 2 and 3, the rear side of the housing 21 is provided with an installation hole 214, the installation hole 214 is a circular hole and is communicated with the installation cavity 211, the adjustment assembly 3 can be installed into the installation cavity 211 from the installation hole 214, the circular sealing plate 23 fixedly connected with the adaptation is arranged in the installation hole 214, a rear hole 231 coaxial with the front hole 213 is arranged in the middle of the sealing plate 23, the diameter of the rear end of the adjustment screw 31 is reduced and clamped in the rear hole 231, and the adjustment screw can rotate in the rear hole 231. Rear ends of both elongated slots 212 extend rearward to communicate with the fitting holes 214, so that both guide pins 322 are fitted into the elongated slots 212, respectively.

Referring to fig. 1 and 2, two guide plates 13 are provided with symmetrical inclined long holes 131, the two inclined long holes 131 may have a high front end and a low rear end, or may have a low front end and a high rear end, and two guide pins 322 extend out of the long groove 212 and are inserted into the two inclined long holes 131 respectively. The left front and back edge of casing 21 and the front and back edge on right side all are provided with bellied chimb 215, form two vertical extension's logical groove between the chimb 215 of homonymy, and two deflector 13 joint respectively are leading to the inslot, and can follow and lead to the groove and slide from top to bottom.

The adjusting screw rod 31 is rotated by using a hexagonal wrench, the screw guide groove 311 applies force to the slider 321, the adjusting ring 32 moves back and forth under the limitation of the long groove 212, the two guide pins 322 of the adjusting ring 32 apply force to the inner wall of the inclined long hole 131, and the guide plate 13 slides up and down relative to the shell 21 under the limitation of the convex edge 215, so that the distance between the lower support plate 22 and the upper support plate 12 is adjusted, the gap between the tibia and the femur is expanded, and the actual gap size of a patient can be flexibly adapted.

Referring to fig. 1, the front side of the housing 21 may be provided with a scale 216 distributed annularly at the edge of the front hole 213, and the end surface of the front end of the adjustment screw 31 may be provided with a position mark 313, and the position mark 313 is eccentrically disposed and avoids the insertion hole 312. When the adjustment screw 31 is rotated, the distance between the lower support plate 22 and the upper support plate 12 can be read based on the positional relationship between the position mark 313 and the scale 216.

Referring to fig. 2 and 3, a flange 314 is arranged on the adjusting screw 31, the flange 314 is close to the front end of the adjusting screw 31 and abuts against the edge of the front hole 213, so as to limit the position, a plurality of positioning grooves 315 are uniformly distributed on the circumferential surface of the flange 314, a blind hole 217 is formed in the housing 21, the blind hole 217 is located above the flange 314 and communicated with the mounting cavity 211, an elastic positioning part 4 is installed in the blind hole 217, the elastic positioning part 4 comprises a positioning spring 41 and a ball 42, the ball 42 partially exposes the lower end of the blind hole 217, the positioning spring 41 pushes the ball 42 to elastically clamp the positioning groove 315 right facing the blind hole 217, and the elastic positioning part can be clamped into other positioning grooves 315 which rotate to the position right facing the blind hole 217 along with the rotation of the adjusting screw 31. The positioning spring 41 and the ball 42 can provide proper damping, elastically limit the rotation angle of the adjusting screw 31, facilitate control of the adjustment amplitude, and realize the stop of the adjusting screw 31 at the set position to prevent the adjusting screw 31 from being reversed.

Referring to fig. 3, in order to facilitate installation of the positioning spring 41, a spring installation hole 218 coaxial with the blind hole 217 may be formed in the bottom of the housing 21, the spring installation hole 218 is a through hole, the upper end of the spring installation hole 218 is communicated with the installation cavity, and the positioning spring 41 may be installed in the blind hole 217 from the spring installation hole 218 through the installation cavity before the adjustment assembly 3 is installed.

The edges and the top angles of the main body 1 and the movable body 2 are all processed into round angles or chamfers so as to reduce the collision to the tissues around the joints of the patient.

The implementation principle of the femoral condyle unilateral screw adjusting type osteotomy device provided by the embodiment of the application is as follows: in the operation of unicondylar joint replacement, can use the lower bolster 22 of activity body 2 and the last backup pad 12 of main part 1 to support the clearance between shin bone and the thighbone, adjust the distance between lower bolster 22 and the last backup pad 12 through rotating accommodate the lead screw 31, can adapt to patient's actual clearance size, the guiding through hole 111 on the main part 1 can also lead the osteotomy saw bit, has realized that support clearance function and osteotomy guiding orientation function unite two into one.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. Thighbone condyle unilateral lead screw regulation type cuts bone device, its characterized in that: the adjustable type adjustable support comprises a main body (1), a movable body (2) and an adjusting assembly (3), wherein the movable body (2) comprises a shell (21) and a lower support plate (22) connected to the rear side of the shell (21), an installation cavity (211) for installing the adjusting assembly (3) is formed in the shell (21), the main body (1) comprises an upper support plate (12) which is right opposite to and parallel to the lower support plate (22) and two guide plates (13) which are vertically arranged and parallel to each other and connected to the front end of the upper support plate (12), and the two guide plates (13) are movably connected to the left side and the right side of the shell (21) respectively;

two the deflector (13) are provided with symmetrical inclined long holes (131), the adjusting component (3) is provided with two guide pins (322) which move in the front-back direction and are respectively inserted into the two inclined long holes (131), the two guide pins (322) move in the front-back direction to apply force to the inner walls of the inclined long holes (131), the shell (21) is pushed to slide up and down relative to the two deflectors (13), and therefore the distance between the lower supporting plate (22) and the upper supporting plate (12) is adjusted.

2. The femoral condyle unilateral lead screw adjustment type osteotomy device of claim 1, wherein: the main part (1) is still including connecting extension (11) in two deflector (13) tops, guide through hole (111) that are used for the direction to cut the bone instrument are seted up in extension (11), guide through hole (111) are on a parallel with go up backup pad (12).

3. The femoral condyle unilateral lead screw adjustment type osteotomy device according to claim 1 or 2, wherein: the adjusting assembly (3) comprises an adjusting screw rod (31) and an adjusting ring (32) sleeved on the adjusting screw rod (31), two ends of the adjusting screw rod (31) are rotatably connected to the front side and the rear side of the shell (21), a spiral guide groove (311) is formed in the peripheral surface of the adjusting screw rod (31), a sliding block (321) matched with the spiral guide groove (311) is arranged on the inner side of the adjusting ring (32), the two guide pins (322) are respectively and fixedly connected to two sides of the adjusting ring (32), long grooves (212) which extend in the front-rear direction and are communicated with the mounting cavity (211) are respectively formed in the left side and the right side of the shell (21), and the two guide pins (322) respectively extend out from the long grooves (212) on two sides and move back and forth along the long grooves (212).

4. The femoral condyle unilateral lead screw adjustment type osteotomy device of claim 3, wherein: be provided with flange (314) on accommodate the lead screw (31), the distribution that encircles on the global of flange (314) has a plurality of constant head tanks (315), open blind hole (217) with installation cavity (211) intercommunication in casing (21), install in blind hole (217) with the elastic locating piece (4) of arbitrary constant head tank (315) elastic clamping.

5. The femoral condyle unilateral lead screw adjustment type osteotomy device of claim 4, wherein: the elastic positioning piece (4) comprises a positioning spring (41) and a ball (42), and the positioning spring (41) pushes the ball (42) to abut against the inside of the positioning groove (315).

6. The femoral condyle unilateral lead screw adjustment type osteotomy device of claim 3, wherein: the rear side of the shell (21) is provided with an installation hole (214) communicated with the installation cavity (211), the rear ends of two long grooves (212) on two sides of the shell (21) are communicated with the installation hole (214), a sealing plate (23) is fixedly connected to the installation hole (214), and a rear hole (231) for installing the rear end of the adjusting screw rod (31) is formed in the middle of the sealing plate (23).

7. The femoral condyle unilateral lead screw adjustment type osteotomy device of claim 3, wherein: the front side of casing (21) is opened and is equipped with preceding hole (213) with installation cavity (211) intercommunication, preceding hole (213) are circular through-hole, accommodate the lead screw (31) front end rotates to be connected in preceding hole (213), and the terminal surface center of this end is seted up and is had jack (312) of edge.

8. The femoral condyle unilateral lead screw adjustment type osteotomy device of claim 7, wherein: the scale (216) which is distributed annularly is arranged on the edge of the front hole (213) on the front side of the shell (21), and the end face of the front end of the adjusting screw rod (31) is provided with a position mark (313).

9. The femoral condyle unilateral lead screw adjustment type osteotomy device of claim 1, wherein: the utility model discloses a lead frame, including casing (21), the preceding and following marginal edge on left front and back edge and right side of casing (21) all is provided with chimb (215), two deflector (13) joint respectively between two chimbs (215) of homonymy, and slide along chimb (215).

10. The femoral condyle unilateral lead screw adjustment type osteotomy device of claim 2, wherein: the extension part (11) is provided with a nail hole (112), and the nail hole (112) is a through hole and is parallel to the guide through hole (111).