Rotating osteotomy shortening device

Abstract

The present invention relates to a rotational osteotomy shortening device, which belongs to the field of medical devices and comprises a rotational osteotomy plate, a bone bending structure fixedly provided on the upper end of the rotational osteotomy plate, an osteotomy length indicator plate fixedly provided on the right side of the rotational osteotomy plate, a sliding protective shell sleeved on the outer side of the osteotomy length indicator plate, and a rotational osteotomy guide groove provided on the bottom of the sliding protective shell. The present invention proposes a rotational osteotomy shortening device that has the functions of rotational bone shrinking, bone bending and rotational osteotomy, thereby realizing cutting of different bone segments at different angles according to target posture requirements, thereby ensuring that the subsequent connection after amputation can restore the normal posture of the bone, realizing that the two bone segments after amputation can restore the initial force line by selecting a rotation or bone bending method, realizing deflection of the movable bone segment, thereby realizing bending of the movable bone segment and the fixed bone segment, so that the two shortened bone segments can still maintain a normal posture, thereby ensuring that the bone after osteotomy and shortening can return to a normal posture and be used normally according to the initial force line, greatly improving the success rate of the operation and the safety of postoperative recovery.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, in particular to a rotary osteotomy shortening device. Background Art

[0002] Bone resection and shortening is an orthopedic surgery used to correct limb bone length discrepancy when the epiphyseal length has matured and epiphyseal growth arrest can no longer be used. The main operation of this surgery is to perform osteotomy on the bone to be corrected within a limited osteotomy length range. On the premise that the force lines of the two bone segments can be transferred to coincide with the initial force lines after osteotomy and shortening, and that the overall posture of the bone after osteotomy and connection is the same as the posture of the normal bone under normal conditions, after osteotomy, external force is used to adjust the posture of the movable segment of the bone to the fixed segment of the bone until it reaches the target fixed position, and then a fixed steel plate is used to complete the connection and fixation of the two bone segments. The most important thing in this process is to ensure that the posture of the bone is normal and the force line is restored after osteotomy and shortening.

[0003] The structure of the device for osteotomy and bone shrinkage in the prior art is as follows: the main body is an osteotomy plate composed of a first plate body and a second plate body connected to each other by a relative sliding mechanism, a guide ruler placed along the length direction of the osteotomy plate is equipped on the osteotomy plate, a third plate body is provided on the guide ruler for sliding along the length direction, and an osteotomy guide groove inclined to the cross section of the ulna is provided on the side of the third plate body. During operation, the osteotomy guide groove, which is fixed in shape and cannot rotate, is slid straightly along the direction of the guide ruler to the position to be osteotomed to perform osteotomy, forming two mutually parallel osteotomy surfaces. After the bone is cut off, the first plate body and the second plate body are pulled closer in a straight line along the direction of the guide ruler by the relative sliding mechanism, thereby driving the bones to approach and fit together, so that the two parallel osteotomy surfaces are directly fit and fixed after being linearly approached, thereby completing the osteotomy and bone shrinkage operation.

[0004] At present, the osteotomy and bone shrinking devices in the existing technology can only form two parallel osteotomy surfaces because the osteotomy guide plate cannot rotate or bend, and can only pull the two severed bone segments closer together along a straight line to complete the fixation. This operation directly pulls the two bone segments that are a certain distance apart along the horizontal line guided by the guide ruler on the bone surface to fit and fix them, and does not rotate or bend the bones according to the change in the force line so that the force lines of the two bone segments can be connected and restored to the original force line. As a result, the force line of the bone structure itself is destroyed, resulting in the original force line of the bone structure after osteotomy and shortening being discontinuous, and the new force line is deviated from the initial force line. As a result, the shortened part of the patient's bone cannot move and be stressed according to the initial normal continuous force line after subsequent recovery, which can easily cause secondary injury to the patient and lead to serious medical accidents. Moreover, most human bones do not grow in an absolutely straight line. Therefore, pulling the two discontinuous bones closer together along a straight line along the parallel osteotomy surface can easily cause the bone posture to deviate from its original normal position, thereby affecting the patient's normal movement after recovery. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to propose a rotational osteotomy shortening device to solve the problem that the existing technology does not have a structure that can simultaneously have the functions of osteotomy guide plate rotation osteotomy and osteotomy fixation plate to drive the severed bone to rotate and bend, causing the force line of the severed and shortened bone to deflect, and the posture of the bone after shortening and fixation to change, which directly causes the patient to be unable to move and apply force normally, and even causes abnormal stress and damage to the bone after surgery. The risk of surgical failure is extremely high, causing great harm to the patient.

[0006] The present invention is achieved through the following technical solutions:

[0007] A rotary osteotomy shortener, characterized in that it includes a rotary bone shrinking plate, a bone bending structure is fixedly provided on the top of the rotary bone shrinking plate, a osteotomy length indicating plate is fixedly assembled on the right side of the rotary bone shrinking plate, a T-shaped sliding groove is provided on the upper end of the osteotomy length indicating plate, a osteotomy length indicating bar is fixedly provided on the left side of the upper end of the osteotomy length indicating plate, a straight rack is provided on the right side of the osteotomy length indicating plate, and a rotating gear is provided through tooth meshing, and the rotating gear is rotatably fixedly provided inside the sliding protection shell, a T-shaped sliding block matching the T-shaped sliding groove is fixedly provided inside the sliding protection shell, the left end of the sliding protection shell is fixedly provided with an indicating plate matching the osteotomy length indicating bar, and a rotary osteotomy guide groove is fixedly provided at the lower right end of the sliding protection shell.

[0008] Furthermore, the rotating bone shrinkage plate includes a fixed bone plate and a movable bone plate. The tops of the fixed bone plate and the movable bone plate are both provided with fixed needle guide sleeves. A rotating groove body is opened on the front side of the fixed bone plate. A rotating scale is arranged around the rotating groove body. The rear side of the movable bone plate is fixed with a rotating guide plate that cooperates with the rotating groove body by screws.

[0009] Furthermore, the bone bending structure includes a rotating fixed pile and a retracting electric sleeve, the rotating fixed pile is fixedly arranged at the upper end of the fixed bone plate, the retracting electric sleeve is fixedly arranged at the upper end of the movable bone plate, a bending turn plate is arranged between the rotating fixed pile and the retracting electric sleeve, the rotating fixed pile is composed of a fixed screw hole base and a clamping bolt, the angle indicating section of the bending turn plate is rotatably arranged between the clamping bolt and the fixed screw hole base, and the rack section of the bending turn plate is meshed and assembled with the retracting electric sleeve.

[0010] Furthermore, a rotation angle dial is provided on the outer side of the rotation fixing pile, and the top of the angle indicating section is provided with an angle indicating needle for pointing to the rotation angle dial.

[0011] Furthermore, the rotation scale is an open slot with an opening at the lower end, and the rotation guide plate is provided with a locking key slot that matches the open slot, and the locking key slot and the open slot are locked and fixed by a locking piece.

[0012] Furthermore, an end locking cover is fixedly provided on the front side of the osteotomy length indicator plate by screws, a first fixed slot plate is provided on the top of the end locking cover, and a second fixed slot plate is fixedly provided on the rear side of the osteotomy length indicator plate. The osteotomy length indicator plate is fixed by passing the fixing screws through the first fixed slot plate and the second fixed slot plate and nailing them into the side of the rotating bone shrinkage plate.

[0013] Furthermore, the rotary osteotomy guide groove includes an osteotomy guide plate and a rotary fixing column. The top of the osteotomy guide plate is set as a rotary sleeve. The rotary sleeve is rotatably set on the rotary fixing column. An angle scale is set around the outer side of the rotary fixing column.

[0014] Furthermore, a clamping groove is provided on the upper surface of the rotating sleeve, and the angle scale is provided as a hollow groove body. The clamping groove and the hollow groove body cooperate with each other and are fixedly connected by a clamping block.

[0015] Furthermore, a clamping sleeve cap for clamping and fixing the rotating sleeve is assembled on the top of the rotating fixing column.

[0016] The beneficial effects of the present invention are:

[0017] The present invention proposes a rotary osteotomy shortening device that has the functions of rotational bone shrinking, bone bending and rotational osteotomy. By setting the rotary osteotomy guide groove, it is conducive to cutting different bone segments at different angles according to the target posture requirements, thereby ensuring that the subsequent connection after amputation can restore the normal posture of the bone. By setting the rotary bone shrinking plate and the bone bending structure, it is conducive to the two bone segments after amputation to restore the initial force line by selecting rotation or bone bending, and it is conducive to deflecting the movable bone segment so that the movable bone segment and the fixed bone segment form a bend so that the two shortened bone segments can still maintain a normal posture, thereby ensuring that the bone can return to the normal posture after osteotomy and shortening and be used normally according to the initial force line, which greatly improves the success rate of the operation and the safety of postoperative recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the overall assembly drawing;

[0019] Figure 2 It is the side view of the overall assembly;

[0020] Figure 3 This is a top view of the overall assembly;

[0021] Figure 4 This is an enlarged view of the interior of the sliding protective shell;

[0022] Figure 5 This is an enlarged view of the rotational osteotomy guide;

[0023] Figure 6 This is the structural diagram of the osteotomy length indicator plate.

[0024] Description of reference numerals:

[0025] 1. Fixed bone plate; 2. Movable bone plate; 3. Fixed needle guide sleeve; 4. Rotation slot; 5. Rotation scale; 6. Rotation guide plate; 7. Locking key slot; 8. Rotation fixed pile; 9. Retracting electric sleeve; 10. Bending plate; 11. Angle indicator section; 12. Rack section; 13. Fixed screw base; 14. Clamping bolt; 15. Bending angle scale; 16. Angle indicator needle; 17. Osteotomy length indicator plate; 18 , end locking cover; 19, first fixed slot plate; 20, second fixed slot plate; 21, T-shaped sliding slot; 22, osteotomy length indicator bar; 23, straight rack; 24, rotating gear; 25, sliding protection shell; 26, T-shaped sliding block; 27, indicator plate; 28, osteotomy guide; 29, rotating fixed column; 30, rotating sleeve; 31, clamping sleeve cap; 32, angle scale; 33, clamping slot; 34, clamping block. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0029] In the above description of the present invention, it should be noted that the terms "one side," "the other side," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0030] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted.

[0031] like Figure 1 -6 shows an embodiment of the present invention: a rotational osteotomy shortening device, including a rotational bone shrinking plate, the rotational bone shrinking plate includes a fixed bone plate 1 and a movable bone plate 2, three fixed pin guide sleeves 3 are fixedly provided on the fixed bone plate, three fixed pin guide sleeves are fixedly provided on the top of the movable bone plate, a rotational groove body 4 is provided on the front side of the fixed bone plate, a rotational scale 5 is arranged around the rotational groove body, a rotational guide plate 6 matched with the rotational groove body is fixed by screws on the rear side of the movable bone plate, the rotational guide plate can be inserted into the rotational groove body, wherein the rotational scale is an open groove with an opening at the lower end, and a locking key groove 7 matched with the open groove is provided on the rotational guide plate. When the locking key groove and the open groove are aligned, the locking piece is inserted into the groove formed by the two grooves for locking and fixing.

[0032] A bone bending structure is fixedly provided on the top of the rotating bone shrinking plate. The bone bending structure consists of a rotating fixed pile 8 and a retracting electric sleeve 9. The rotating fixed pile is fixedly provided on the upper end of the fixed bone plate, and the retracting electric sleeve is fixedly provided on the upper end of the movable bone plate. A bending rotating plate 10 for connecting the two is provided between the rotating fixed pile and the retracting electric sleeve. The bending rotating plate is composed of an angle indicating segment 11 which indicates the angle by rotation and a rack segment 12 which is retracted by tooth engagement. The rotating fixed pile is composed of a fixed screw hole base 13 which is fixedly provided on the upper end of the fixed bone plate and a clamping bolt 14 which is used to clamp the angle indicating segment for positioning. The rack segment and the retracting electric sleeve are assembled by tooth engagement, and a bending angle scale 15 is provided around the outside of the rotating fixed pile, and an angle indicating needle 16 is provided at the end of the angle indicating segment.

[0033] An osteotomy length indicator plate 17 is provided on the right side of the rotating bone shrinking plate, an end locking cover 18 is fixed on the front side of the osteotomy length indicator plate by screws, a first fixed slot plate 19 is provided on the top of the end locking cover, and a second fixed slot plate 20 is fixed on the rear side of the osteotomy length indicator plate. The osteotomy length indicator plate is fixed by passing through the first fixed slot plate and the second fixed slot plate through fixing screws and nailed into the right side of the rotating bone shrinking plate.

[0034] A T-shaped sliding groove 21 is provided at the upper end of the osteotomy length indicator plate, and an osteotomy length indicating bar 22 is fixedly provided on the left side of the upper end of the osteotomy length indicator plate. The right side of the osteotomy length indicator plate is provided with a straight rack 23, and a rotating gear 24 is provided on the right side of the straight rack through tooth meshing. The rotating gear is rotatably fixed inside the sliding protective shell 25, and the sliding protective shell is slidably provided on the right side of the osteotomy length indicator plate. A T-shaped sliding block 26 that matches the T-shaped sliding groove is fixedly provided inside the sliding protective shell, and the left end of the sliding protective shell is provided with an indicating plate 27 that matches the osteotomy length indicating bar.

[0035] A rotating osteotomy guide groove is fixedly provided at the lower right end of the sliding protection shell, and the rotating osteotomy guide groove includes an osteotomy guide plate 28 and a rotating fixed column 29. The top of the osteotomy guide plate is set as a rotating sleeve 30, and the rotating sleeve is rotatably set on the rotating fixed column. A clamping sleeve cap 31 for clamping and fixing the rotating sleeve is assembled on the top of the rotating fixed column. An angle scale 32 is arranged around the outside of the rotating fixed column, and the angle scale is set as a hollow groove body. A clamping groove 33 that matches the hollow groove body is opened on the upper surface of the rotating sleeve. After the clamping groove and the hollow groove body are aligned and matched, they are fixed and clamped together through a clamping block 34.

[0036] The usage of this embodiment during implementation is as follows: first establish a three-dimensional coordinate system, take the center of the rotating bone shrinking plate as the origin, set the direction of the force line of the bone to be cut off to the Y-axis direction, set the direction perpendicular to the Y-axis and pointing to the right side of the rotating bone shrinking plate as the positive direction of the X-axis, and set the direction perpendicular to the upper end face of the rotating bone shrinking plate as the Z-axis direction. When using this device, first place the rotating bone shrinking plate at the target osteotomy position, and then screw the Kirschner wire into the bone to be cut off along the fixing needle guide sleeve to complete the fixation.

[0037] Then assemble the sliding protective shell to the osteotomy length indicator plate so that the T-shaped sliding block slides into the T-shaped sliding groove, and then align the indicator plate to the initial position of the osteotomy length indicator bar, and then send the gear through the window on the right side of the sliding protective shell to the engagement position with the spur rack, and then use the fixed rotating device to rotate and fix the gear on the sliding protective shell so that it is inside the sliding protective shell, and then fix the end locking cover to the front side of the osteotomy length indicator plate with screws to prevent the T-shaped sliding block from sliding out of the groove during use, and then put the rotating sleeve on the top of the osteotomy guide plate on the rotating fixed column, and then put on the clamping sleeve cap to complete the preliminary assembly of the osteotomy length indicator plate.

[0038] Next, place the assembled osteotomy length indicator plate on the right side of the rotating bone shrinking plate so that the left side of the osteotomy length indicator plate and the right side of the rotating bone shrinking plate are in contact with each other, and then use screws to pass through the first fixed slot plate and the second fixed slot plate and nail them into the right side of the rotating bone shrinking plate, so as to fix the assembled osteotomy length indicator plate on the rotating bone shrinking plate.

[0039] Then, according to the osteotomy surface angle set in the treatment plan to ensure that the osteotomy surface after the guided cutting can ensure the restoration of the force line and the normal restoration of the overall posture of the bone after shortening, the osteotomy guide is rotated around the X-axis direction. The osteotomy guide is rotated around the rotating fixed column to the target angle position, and then the positioning block is inserted into the groove formed by aligning the hollow groove and the slot to complete the fixation of the osteotomy guide at the angle state. Then the clamping cap is clamped to make the angle fixation of the osteotomy guide more stable, and then the osteotomy operation can be started at the osteotomy site. After completing an osteotomy operation, the sliding protective shell is moved along the indicator plate. After moving the target distance to be cut, it stops, and the osteotomy guide is rotated to the target angle and fixed. Then the osteotomy surface is guided. After the osteotomy is completed, the cut bone is removed.

[0040] Then, according to the analysis of the changes in the force line and bone posture after osteotomy in the treatment plan, it is judged whether the severed bone needs to be rotated around the Y axis to restore the force line, or to bend the bone by deflection around the Z axis to achieve normal restoration of the bone posture and force line adjustment. After judgment and selection, if it is necessary to rotate around the Y axis to restore the force line, first remove the osteotomy length indicator plate from the right side of the rotating bone reduction plate, then fix the rotating guide plate to the movable bone plate with screws, and insert the rotating guide plate into the rotating slot, and align the locking key slot with the rotating key slot. The movable scale is preliminarily aligned, the initial scale is recorded, and then the movable bone plate is rotated according to the required rotation angle. The rotation of the movable bone plate drives the fixed bone to rotate, so that the locking keyway is aligned to the rotation scale of the target value and then stops, and the locking part is inserted into the keyway formed by the combination of the locking keyway and the rotation scale to limit the movement of the bone. Then, the movable bone plate is clamped and moved closer to the fixed bone plate by applying an external clamping device, and finally it is contacted to reach the target position. Then, the two sections of bones are bound and fixed to limit the position, and the rotating osteotomy reducer is removed to complete the operation.

[0041] If, after judgment, it is necessary to achieve bending by deflecting the bone around the Z axis to achieve normal restoration of the bone posture and force line adjustment, first insert the rack section of the bending turn plate into the retracted electric sleeve, then place the angle indicator section of the bending turn plate on the fixed screw hole base, and align its holes, then gently install the clamping bolt into the fixed screw hole base to complete the initial assembly and fixation. Since the clamping bolt is lightly engaged and inserted, the bending turn plate can also be rotated around the Z axis, and then the entire movable bone plate is controlled to bend and rotate around the Z axis. The rotation of the movable bone plate drives the fixed bone heel As the bone plate rotates, the rotation of the movable bone plate drives the bending plate to rotate around the rotating fixed post. When the value of the bending angle scale pointed to by the angle indicator needle is the target value, the rotation is stopped, and the clamping bolt is completely tightened into the fixed screw hole base so that the bending plate is completely limited. Then the retraction electric sleeve is started so that it will engage the rack segment into the retraction electric sleeve, thereby driving the movable bone plate to approach the fixed bone plate along the fixed direction, and finally make it contact and reach the target position. Then the two sections of bones are bound and the fixed plate is limited, and the rotating osteotomy and retractor are removed to complete the operation.

[0042] This embodiment proposes a rotary osteotomy shortening device that has the functions of rotational bone shrinking, bone bending and rotational osteotomy. By setting the rotary osteotomy guide groove, it is conducive to cutting different bone segments at different angles according to the target posture requirements, thereby ensuring that the subsequent connection after amputation can restore the normal posture of the bone. By setting the rotary bone shrinking plate and the bone bending structure, it is conducive to restoring the initial force line of the two bone segments after amputation by selecting rotation or bone bending, and is conducive to deflecting the movable bone segment so that the movable bone segment and the fixed bone segment form a bend so that the two shortened bone segments can still maintain a normal posture, thereby ensuring that the bone can return to the normal posture after osteotomy and shortening and be used normally according to the initial force line, which greatly improves the success rate of the operation and the safety of postoperative recovery.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A rotary osteotomy shortening device, characterized in that: It includes a rotating bone shrinking plate, the top of which is fixedly provided with a bone bending structure, a bone resection length indicating plate is fixedly assembled on the right side of the rotating bone shrinking plate, a T-shaped sliding groove is provided on the upper end of the osteotomy length indicating plate, a osteotomy length indicating bar is fixedly provided on the left side of the upper end of the osteotomy length indicating plate, a straight rack is provided on the right side of the osteotomy length indicating plate, and a rotating gear is provided on the straight rack through tooth meshing, and the rotating gear is rotatably fixed inside the sliding protection shell, a T-shaped sliding block matching the T-shaped sliding groove is fixedly provided inside the sliding protection shell, the left end of the sliding protection shell is fixedly provided with an indicating plate matching the osteotomy length indicating bar, and a rotating osteotomy guide groove is fixedly provided on the lower right end of the sliding protection shell.

2. A rotary osteotomy shortening device according to claim 1, characterized in that: The rotating bone shrinkage plate includes a fixed bone plate and a movable bone plate. The top of the fixed bone plate and the movable bone plate are both provided with a fixed needle guide sleeve. The front side of the fixed bone plate is provided with a rotating groove body, and a rotating scale is arranged around the rotating groove body. The rear side of the movable bone plate is fixed with a rotating guide plate that matches the rotating groove body by screws.

3. A rotary osteotomy shortening device according to claim 2, characterized in that: The bone bending structure includes a rotating fixed pile and a retracting electric sleeve. The rotating fixed pile is fixedly arranged at the upper end of the fixed bone plate, and the retracting electric sleeve is fixedly arranged at the upper end of the movable bone plate. A bending turn plate is arranged between the rotating fixed pile and the retracting electric sleeve. The rotating fixed pile is composed of a fixed screw hole base and a clamping bolt. The angle indicating section of the bending turn plate is rotatably arranged between the clamping bolt and the fixed screw hole base. The rack section of the bending turn plate is meshed and assembled with the retracting electric sleeve.

4. A rotary osteotomy shortening device according to claim 3, characterized in that: A rotation angle dial is provided on the outer side of the rotation fixing pile, and an angle indicating needle is provided on the top of the angle indicating section for pointing to the rotation angle dial.

5. The rotary osteotomy shortening device according to claim 2, characterized in that: The rotation scale is an open slot with an opening at the lower end. A locking key slot matching the open slot is provided on the rotation guide plate. The locking key slot and the open slot are locked and fixed by a locking piece.

6. The rotary osteotomy shortening device according to claim 1, characterized in that: The front side of the osteotomy length indicator plate is fixed with an end locking cover by screws, the top of the end locking cover is provided with a first fixed slot plate, and the rear side of the osteotomy length indicator plate is fixed with a second fixed slot plate. The osteotomy length indicator plate is fixed by passing the fixing screws through the first and second fixed slot plates and nailing them into the side of the rotating bone shrinkage plate.

7. The rotary osteotomy shortening device according to claim 1, characterized in that: The rotary osteotomy guide groove includes an osteotomy guide plate and a rotary fixing column. The top of the osteotomy guide plate is provided with a rotary sleeve. The rotary sleeve is rotatably provided on the rotary fixing column. An angle scale is provided around the outer side of the rotary fixing column.

8. The rotary osteotomy shortening device according to claim 7, characterized in that: A clamping groove is provided on the upper surface of the rotating sleeve, and the angle scale is provided as a hollow groove body. The clamping groove and the hollow groove body cooperate with each other and are fixedly connected by a clamping block.

9. The rotary osteotomy shortening device according to claim 7, characterized in that: The top of the rotation fixing column is equipped with a clamping sleeve cap for clamping and fixing the rotation sleeve.

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