CN214712686U - Single-side eccentric adjustment type osteotomy device for femoral condyle - Google Patents

Abstract

The application relates to a unilateral eccentric adjustment type osteotomy device for femoral condyles, which comprises a main body, a movable body and an adjusting assembly, wherein the main body comprises a support plate and a guide mounting block connected to one end of the support plate; the movable body comprises a sliding plate and a sliding connecting block connected to one end of the sliding plate, the sliding plate is parallel to the supporting plate and is arranged opposite to the supporting plate, the sliding connecting block is movably connected with the guide mounting block and slides along the direction vertical to the supporting plate, and an elongated slot vertical to the sliding direction of the sliding connecting block is formed in the sliding connecting block; the adjusting assembly comprises an adjusting knob and an eccentric part eccentrically connected to one end of the adjusting knob, the adjusting knob is rotatably arranged on the guide mounting block, the direction of a rotating axis is consistent with the length direction of the supporting plate, the eccentric part extends into the elongated slot, the adjusting knob is rotated, the eccentric part applies force along the inner wall of the elongated slot to drive the sliding connecting block to slide, and the distance between the supporting plate and the sliding plate is adjusted. The specification of this application is adjustable, convenient to use.

Description

Single-side eccentric adjustment type osteotomy device for femoral condyle

Technical Field

The application relates to the field of medical equipment, in particular to a femoral condyle unilateral eccentric adjustment 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 eccentric adjustment type cuts bone device.

The application provides a thighbone condyle unilateral eccentric adjustment type cuts bone device adopts following technical scheme:

the unilateral eccentric adjustment type osteotomy device for the femoral condyle comprises a main body, a movable body and an adjusting assembly, wherein the main body comprises a supporting plate and a guide mounting block connected to one end of the supporting plate;

the movable body comprises a sliding plate and a sliding connecting block connected to one end of the sliding plate, the sliding plate is parallel to the supporting plate and is arranged opposite to the supporting plate, the sliding connecting block is movably connected with the guide mounting block and slides along the direction vertical to the supporting plate, and an elongated slot vertical to the sliding direction of the sliding connecting block is formed in the sliding connecting block;

the adjusting assembly comprises an adjusting knob and an eccentric part eccentrically connected to one end of the adjusting knob, the adjusting knob is rotatably arranged on the guide mounting block, the direction of a rotating axis is consistent with the length direction of the supporting plate, the eccentric part extends into the elongated slot, the adjusting knob is rotated, the eccentric part applies force along the inner wall of the elongated slot to drive the sliding connecting block to slide, and the distance between the supporting plate and the sliding plate is adjusted.

Through adopting above-mentioned technical scheme, during the operation, cut the bone to the shin bone side earlier, then adjust backup pad and slide to the state that is close to each other, and stretch into both in the space between shin bone side and the thighbone side, backup pad butt thighbone side, the osteotomy face of slide butt shin bone side, then rotation regulation knob, the eccentric member is to the elongated slot inner wall application of force, the length direction of elongated slot provides the displacement space for rotatory eccentric member, thereby the eccentric member promotes sliding connection piece and slides along the direction of perpendicular to backup pad, sliding connection piece drives the slide and removes and keep away from the backup pad, thereby prop open the space between shin bone side and the thighbone side, adjustable support knee joint clearance has been realized, high durability and convenient use.

Optionally, a guide through hole for guiding the osteotomy tool is formed in the guide mounting block, and the guide through hole is parallel to the support plate.

Through adopting above-mentioned technical scheme, the guiding hole is on a parallel with the backup pad, so be on a parallel with the slide, the installation back slide butt and be on a parallel with the section face of shin bone side, so the guiding hole is on a parallel with the section 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, and support clearance function and osteotomy direction locate function unite two into one, and it is more simple and convenient to operate.

Optionally, the guide mounting block is provided with a sliding groove which is installed in a matching manner with the sliding connection block.

Through adopting above-mentioned technical scheme, the spout can lead to the slip direction of direction installation piece.

Optionally, the sliding groove is a T-shaped structure for limiting the position of the sliding connection block, and the sliding connection block is also a T-shaped structure adapted to the sliding groove.

Through adopting above-mentioned technical scheme, the spout of T shape structure can prevent that the sliding connection piece of T shape structure from breaking away from.

Optionally, a round hole for installing an adjusting knob is formed in the guide installation block, the round hole is a through hole, and a jack with an edge is formed in the center of the end face of the adjusting knob, which is far away from one end of the eccentric part.

By adopting the technical scheme, the jack on the adjusting knob is used for being matched with a wrench with an edge in an inserting mode, so that the adjusting knob can be conveniently rotated.

Optionally, the edge of one end of the round hole, which is far away from the supporting plate, is provided with annularly distributed scales, and the end face of the adjusting knob, which is far away from the supporting plate, is provided with position marks.

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

Optionally, positioning grooves are distributed on the circumferential surface of the adjusting knob in a surrounding manner, blind holes communicated with the round holes are formed in the guide mounting block, and elastic positioning pieces elastically clamped with any one positioning groove are mounted in the blind holes.

Through adopting above-mentioned technical scheme, elastic positioning element and constant head tank elastic clamping can the rotation angle of elastic limit adjust knob, realize adjust knob and stop in setting for the position, are favorable to the control to the range of regulation to can prevent that adjust knob from reversing.

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 adjust knob rotate easily.

Optionally, a mounting hole is formed in one side of the adjusting knob facing the sliding connection block, an elastic piece is arranged in the mounting hole, the eccentric piece is cylindrical, and one end of the eccentric piece, which is far away from the elongated slot, is inserted into the mounting hole and elastically abuts against the elastic piece.

By adopting the technical scheme, the elastic piece can enable the eccentric piece to tightly abut against the bottom of the elongated slot, so that the stability between the guide mounting block and the sliding connecting block is improved, and the adjustment accuracy is improved.

Optionally, the guide mounting block is provided with a nail hole, the nail hole is a through hole, and the extending direction of the nail hole is consistent with the length direction of the support plate.

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

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

1. the supporting plate of the main body and the sliding plate of the movable body can support the gap between the tibia and the femur and can be adjusted through the adjusting assembly, so that the use is convenient;

2. the guide through hole on the main body can guide the osteotomy tool, so that the use is more convenient;

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 of a doctor on the adjusting range is facilitated.

Drawings

FIG. 1 is a schematic overall view of a unilateral eccentric adjustment osteotomy device of a femoral condyle;

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

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

fig. 4 is a schematic structural view of a movable body of the unilateral eccentric adjustment type osteotomy device of the femoral condyle.

Description of reference numerals: 1. a main body; 11. a support plate; 12. a guide mounting block; 121. an installation part; 1211. a chute; 1212. a circular hole; 1213. a guide through hole; 1214. blind holes; 1215. a spring mounting through hole; 1216. calibration; 122. an extension portion; 1221. nailing holes; 1222. a weight reduction groove; 2. a movable body; 21. a slide plate; 22. a sliding connection block; 221. a long groove; 3. an adjustment assembly; 31. adjusting a knob; 311. mounting holes; 312. a flange; 313. positioning a groove; 314. a jack; 315. position marking; 32. an eccentric member; 33. a compression spring; 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 unilateral eccentric adjustment type osteotomy device for femoral condyle. Referring to fig. 1 and 2, the unilateral eccentric adjustment type osteotomy device of femoral condyle includes a main body 1, a movable body 2 and an adjustment assembly 3. The main part 1 includes backup pad 11 and direction installation piece 12, and backup pad 11 is the platelike structure of cuboid, and the one end at backup pad 11 is connected of direction installation piece 12 integrated into one piece, and perpendicular with backup pad 11, and adjusting part 3 installs on direction installation piece 12. The movable body 2 comprises a sliding plate 21 and a sliding connection block 22, the sliding plate 21 is of a plate-shaped structure, the sliding plate 21 and the support plate 11 are oppositely arranged and parallel, and the sliding connection block 22 is integrally connected to one end of the sliding plate 21. The support plate 11 and the slide plate 21 are used to support the space between the tibia and the femur, and the adjustment assembly 3 is used to adjust the distance between the support plate 11 and the slide plate 21.

Referring to fig. 1 and 2, the guide mounting block 12 includes a mounting portion 121 and an extending portion 122, the mounting portion 121 is substantially a block-shaped structure, a sliding slot 1211 is formed on a side of the mounting portion 121 facing the movable body 2, the sliding slot 1211 is a T-shaped structure, an extending direction of the sliding slot 1211 is perpendicular to the supporting plate 11, and one end of the sliding slot 1211 extends out of a side of the mounting portion 121 away from the extending portion 122. Sliding connection piece 22 is the massive structure of cuboid, and perpendicular with slide 21, and slide 21 towards 11 one sides of backup pad and sliding connection piece 22 towards 11 one sides of backup pad flush for slide 21 can laminate with backup pad 11, and the arc transitional coupling that keeps away from backup pad 11 one side of slide 21 and sliding connection piece 22 junction strengthens joint strength. Both sides of the slide connecting block 22 protrude from both sides of the slide plate 21 so that the slide plate 21 and the slide connecting block 22 are connected in a T-shaped structure, which is installed in cooperation with the slide groove 1211 and can slide along the slide groove 1211, thereby adjusting the distance between the support plate 11 and the slide plate 21. The extending portion 122 is integrally connected to an end surface of the mounting portion 121 near the other end of the sliding groove 1211. One end of the support plate 11 is connected to the side of the mounting portion 121 near the extension portion 122, i.e., to one end of the slide groove 1211.

Referring to fig. 2 and 3, a circular hole 1212 is formed in the mounting portion 121, the circular hole 1212 is a through hole, one end of the through hole communicates with the bottom of the sliding groove 1211, and the other end of the through hole extends out of a side of the mounting portion 121 away from the supporting plate 11. The adjustment assembly 3 includes an adjustment knob 31, an eccentric member 32 and an elastic member. The adjusting knob 31 is rotatably mounted in the circular hole 1212 with its rotation axis direction coinciding with the longitudinal direction of the support plate 11. The adjusting knob 31 has a mounting hole 311 formed on a side thereof facing the chute 1211, the mounting hole 311 is offset from a center of the adjusting knob 31, and an elastic member, such as a compression spring 33, is disposed in the mounting hole 311. The eccentric member 32 has a cylindrical shape, and one end thereof is inserted into the mounting hole 311 and elastically abuts against the compression spring 33.

Referring to fig. 3 and 4, a long groove 221 is opened on a side of the sliding connection block 22 facing the guide mounting block 12, and the long groove 221 is perpendicular to the slide groove 1211. One end of the eccentric member 32, which is far away from the mounting hole 311, is inserted into the long groove 221 and abuts against the bottom of the long groove 221 under the pushing of the compression spring 33, so that the eccentric member 32 is more stable, and the stability of the whole structure is improved.

The adjustment knob 31 is rotated to drive the eccentric member 32 to rotate, the eccentric member 32 applies force to the inner wall of the elongated slot 221, the length direction of the elongated slot 221 provides a displacement space for the eccentric member 32, and the eccentric member 32 can drive the sliding connection block 22 to move along the slide slot 1211, thereby adjusting the distance between the support plate 11 and the slide plate 21.

Referring to fig. 1, a guide through hole 1213 is formed at a connection portion of the mounting portion 121 and the extending portion 122, an extending direction of both ends of the guide through hole 1213 is identical to a length direction of the support plate 11, and the guide through hole 1213 is a long hole and is parallel to the support plate 11. The guide long hole is used for guiding the osteotomy saw blade. The extending portion 122 is substantially triangular and is provided with a nail hole 1221 for inserting a fixing nail, and the extending direction of the nail hole 1221 is the same as the length direction of the supporting plate 11. The number of the nail holes 1221 can be three, three nail holes 1221 can be distributed in a triangle, and the weight-reducing grooves 1222 can be formed in the middle of the three nail holes 1221.

During operation, a osteotomy surface is cut at the proximal end of the tibia, then the supporting plate 11 and the sliding plate 21 extend into a gap between the tibia and the femur, so that the sliding plate 21 is parallelly abutted against the osteotomy surface of the tibia, the supporting plate 11 is abutted against one side of the femur, and the sliding plate 21 can be set to be in a shape conforming to the outer contour of the osteotomy surface of the tibia; then, the adjusting knob 31 is rotated to enable the sliding plate 21 to slide downwards to support the tibia side, and whether the tension of the inner side and the outer side of the knee joint is proper or not is judged by observing the tightness of the inner and the outer collateral ligaments and the angle of the femur and the tibia; fixing nails penetrate through the three nail holes 1221, and the mounting part 121 is fixedly connected with the femur through the fixing nails; after the connection is stabilized, the osteotomy saw blade is inserted into the guide through hole 1213 to perform osteotomy of the femur. Since the guide through groove is parallel to the support plate 11 and thus parallel to the sliding plate 21, and the sliding plate 21 abuts and is parallel to the osteotomy surface on the tibia side, the section of the osteotomy saw blade cut on the femur side can be parallel to the section of the tibia.

Referring to fig. 2 and 3, the adjusting knob 31 is provided at an edge thereof connected to one end of the eccentric member 32 with a flange 312, a plurality of positioning grooves 313 are distributed on a circumferential surface of the flange 312, and a circular hole 1212 is provided as a stepped hole adapted to the shape of the adjusting knob 31. The mounting portion 121 of the guide mounting block 12 is further provided with a blind hole 1214 communicated with the circular hole 1212, the blind hole 1214 is provided on one side of the circular hole 1212 close to the extending portion 122, and an elastic positioning member 4 is provided in the blind hole 1214 for limiting the rotation of the adjusting knob 31. The elastic positioning member 4 comprises a positioning spring 41 and a ball 42, and the positioning spring 41 pushes the ball 42 to elastically abut in any positioning groove 313 opposite to the ball 42 along with the rotation of the adjusting knob 31. The positioning spring 41 and the ball 42 can provide proper damping, enable the stop of the adjustment knob 31 in the set position, facilitate control of the adjustment amplitude, and prevent the adjustment knob 31 from being reversed.

Referring to fig. 3, to facilitate installation of the compression spring 33, a spring installation through hole 1215 may be formed in the mounting portion 121 and is coaxial with the blind hole 1214, one end of the spring installation through hole 1215 communicates with the round hole 1212, and the other end extends to the end of the mounting portion 121 far away from the extension portion 122, and the compression spring 33 can be installed in the blind hole 1214 through the round hole 1212 from the spring installation through hole 1215.

Referring to fig. 1, the end surface of the adjusting knob 31, which is far from the end of the eccentric member 32, is flush with the side surface of the guide mounting block 12, and an insertion hole 314 with an edge is formed at the center of the end surface of the end. In this application, jack 314 can set up to hexagonal prism shape, can with hexagonal wrench adaptation to be convenient for rotate adjust knob 31.

Referring to fig. 1, the end surface of the adjusting knob 31 far away from the eccentric member 32 is further provided with a position mark 315, the position mark 315 is eccentrically arranged to avoid the insertion hole 314, the edge of the circular hole 1212 far away from the end of the supporting plate 11 is provided with a scale 1216 annularly distributed, and the distance between the supporting plate 11 and the sliding plate 21 can be read according to the position relationship between the position mark 315 and the scale 1216.

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 application principle of the eccentric adjustment type osteotomy device of the femoral condyle unilateral is as follows: in the unicondylar joint replacement operation, the backup pad 11 of main part 1 and the slide 21 of movable body 2 support the clearance between shin bone and the thighbone, and the distance of backup pad 11 and slide 21 can be adjusted through rotating adjust knob 31 to adapt to patient's actual need, the guide through-hole 1213 can also lead the osteotomy instrument, has realized that support clearance function and osteotomy direction location function unite two into one, and is more simple and convenient to operate.

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 (10)

1. Thighbone condyle unilateral eccentric regulation type cuts bone device, its characterized in that: the device comprises a main body (1), a movable body (2) and an adjusting assembly (3), wherein the main body (1) comprises a supporting plate (11) and a guide mounting block (12) connected to one end of the supporting plate (11);

the movable body (2) comprises a sliding plate (21) and a sliding connecting block (22) connected to one end of the sliding plate (21), the sliding plate (21) is parallel to the supporting plate (11) and is arranged opposite to the supporting plate (11), the sliding connecting block (22) is movably connected with the guide mounting block (12) and slides along the direction vertical to the supporting plate (11), and a long groove (221) vertical to the sliding direction of the sliding connecting block (22) is formed in the sliding connecting block (22);

the adjusting assembly (3) comprises an adjusting knob (31) and an eccentric part (32) eccentrically connected to one end of the adjusting knob (31), the adjusting knob (31) is rotatably arranged on the guide mounting block (12), the direction of the rotating axis is consistent with the length direction of the supporting plate (11), the eccentric part (32) extends into the long groove (221), the adjusting knob (31) is rotated, the eccentric part (32) applies force along the inner wall of the long groove (221) to drive the sliding connecting block (22) to slide, and the distance between the supporting plate (11) and the sliding plate (21) is adjusted.

2. The femoral condyle unilateral eccentric adjustment type osteotomy device according to claim 1, wherein: the guide mounting block (12) is provided with a guide through hole (1213) for guiding the osteotomy tool, and the guide through hole (1213) is parallel to the support plate (11).

3. The femoral condyle unilateral eccentric adjustment type osteotomy device according to claim 1, wherein: the guide mounting block (12) is provided with a sliding groove (1211) which is matched and mounted with the sliding connecting block (22).

4. The femoral condyle unilateral eccentric adjustment type osteotomy device of claim 3, wherein: the sliding groove (1211) is provided with a T-shaped structure for limiting the position of the sliding connecting block (22), and the sliding connecting block (22) is also provided with a T-shaped structure matched with the sliding groove (1211).

5. The femoral condyle unilateral eccentric adjustment type osteotomy device according to claim 1, wherein: the guide mounting block (12) is provided with a round hole (1212) for mounting the adjusting knob (31), the round hole (1212) is a through hole, and the center of the end face of the adjusting knob (31) far away from one end of the eccentric part (32) is provided with a jack (314) with an edge.

6. The femoral condyle unilateral eccentric adjustment type osteotomy device of claim 5, wherein: the edge of one end, deviating from the supporting plate (11), of the round hole (1212) is provided with scales (1216) distributed in an annular mode, and the end face, deviating from the supporting plate (11), of the adjusting knob (31) is provided with position marks (315).

7. The femoral condyle unilateral eccentric adjustment type osteotomy device of claim 5, wherein: the utility model discloses a set up the elasticity setting element (4) of locating slot (313) with arbitrary locating slot (313) elasticity joint is installed in blind hole (1214) on guide installation piece (12) the last constant head tank (313) that encircles of adjust knob (31), set up on guide installation piece (12) with blind hole (1214) of round hole (1212) intercommunication, install in blind hole (1214).

8. The femoral condyle unilateral eccentric adjustment type osteotomy device of claim 7, 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 (313).

9. The femoral condyle unilateral eccentric adjustment type osteotomy device according to claim 1, wherein: the adjusting knob (31) is provided with a mounting hole (311) towards one side of the sliding connection block (22), an elastic piece is arranged in the mounting hole (311), the eccentric piece (32) is cylindrical, and one end, far away from the long groove (221), of the eccentric piece is inserted into the mounting hole (311) and elastically abutted against the elastic piece.

10. The femoral condyle unilateral eccentric adjustment type osteotomy device according to claim 1, wherein: the guide mounting block (12) is provided with a nail hole (1221), and the nail hole (1221) is a through hole and the extending direction of the nail hole is consistent with the length direction of the support plate (11).

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