CN114053004A

CN114053004A - Middle condyle holding device

Info

Publication number: CN114053004A
Application number: CN202111476959.9A
Authority: CN
Inventors: 闵信群; 毛联甲; 魏崇斌; 王健; 江伟
Original assignee: Tianyan Medical Equipment Co ltd
Current assignee: Tianyan Medical Equipment Co ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-02-18

Abstract

The invention discloses a medial condyle holding device, which comprises: a holding rod; the block piece is connected with the holding rod piece at one end; and one end of the clamping rod piece is connected with the holding rod piece in a sliding manner, the clamping rod piece penetrates through the block piece, and a hook is arranged at one end penetrating through the block piece. The invention has the technical effects of finishing stable clamping action on the femoral condyle prosthesis or prosthesis test mold, realizing middle holding of the femoral condyle prosthesis or prosthesis test mold, avoiding the interference of a condyle holding device and cortex, reducing the operation risk of the operation and promoting the implementation of minimally invasive surgery.

Description

Middle condyle holding device

Technical Field

The invention relates to the technical field of surgical instruments, in particular to a medial condyle holding device.

Background

An artificial joint replacement operation, which adopts materials such as metal, high molecular polyethylene, ceramic and the like, is made into an artificial joint prosthesis according to the shape, the structure and the functions of joints of a human body, is implanted into the human body through a surgical operation technology to replace the functions of the affected joints, and achieves the purposes of relieving joint pain and recovering the functions of the joints. Now, with the advancement and development of science and technology, joint replacement surgery has become a focus of attention of many patients, wherein the knee joint is one of the largest and most complex joints of the human body and is the most important joint in the motion process of the human body. The development of knee joint prosthesis systems has been in the past for decades, and when a natural knee joint of a human body has lost partial or all functions due to pathological changes or injuries and the like, the knee joint prosthesis system needs to be adopted for replacement so as to rebuild the normal functions of the knee joint, reduce the pain and inconvenience of a patient, achieve the best treatment effect by implementing knee joint prosthesis replacement, and can recover the mobility of the patient to the maximum extent.

The replacement of the femoral condyle prosthesis is a part of knee joint prosthesis replacement surgery, because the size of the femur of each patient is different, a series of femoral condyle prostheses with the size specification are generally available, in the surgery process, the size of the femoral condyle needs to be measured through corresponding femoral measurement tools and femoral condyle test molds with different specifications so as to determine the final implanted prosthesis specification, then the prosthesis is clamped through a special holder, the prosthesis is installed on a corresponding part for preliminary fixation, then a matched impactor is replaced, the rear end of the impactor is knocked through tools such as a hammer and the like, and the femoral condyle prostheses are completely implanted.

The existing holder for the femoral condyle prosthesis and the test mold generally comprises three parts, namely a chuck, a locking part and a knocking part, wherein the chuck clamps femoral condyle test molds or prostheses with different specifications, the femoral condyle test molds or prostheses are initially fixed at the far end of the femur after being locked, and then a matched impactor is replaced, so that the test molds or the prostheses can be completely implanted and the fitting degree of a condyle cavity and a bone is adjusted. Due to the structure limitation, the existing condyle holding device has certain defects:

firstly, the clamping head clamps the edge side of the femoral condyle prosthesis or the trial model, the locking process is complicated, the space occupied by the instrument is enlarged, the position is adjusted, the instrument is easy to interfere with the cortex, and the cortex is damaged, so that the operation difficulty of a doctor is high;

secondly, the condyle holding device cannot be directly knocked to implant the femoral condyle prosthesis or a trial model, and a matched impactor needs to be replaced, so that the operation process is complicated, the operation time is increased, and the risk is increased.

Based on the defects, the invention discloses a medial condyle holding device which is used for solving the existing problems.

Disclosure of Invention

The present invention is directed to a medial condyle holding device to solve the problems set forth in the background art.

In order to solve the technical problems, the invention provides the following technical scheme: a medial condyle holder comprising: a holding rod; the block piece is connected with the holding rod piece at one end; and one end of the clamping rod piece is connected with the holding rod piece in a sliding manner, the clamping rod piece penetrates through the block piece, and a hook is arranged at one end penetrating through the block piece.

Preferably, the condyle holding device further comprises: the locking handle, one end of the said locking handle is hinged with the said grip member bar; the locking block is connected with the locking handle in a sliding mode, first teeth are arranged on the locking block, and the first teeth correspond to second teeth arranged on the locking handle; one end of the connecting rod is hinged with the holding rod piece, and the other end of the connecting rod is hinged with the locking block; the locking handle and the connecting rod form an acute angle.

Preferably, the locking handle comprises: the locking block is connected with the handle body in a sliding mode, and the first teeth are arranged on the handle body; one end of the first elastic piece is connected with the handle body, and the other end of the first elastic piece is hinged with the clamping rod piece.

Preferably, the condyle holding device further comprises: one end of the guide rod piece is hinged with the locking block, and the other end of the guide rod piece penetrates through the locking handle, so that the guide rod piece and the locking handle can generate relative displacement; one end of the second elastic piece is abutted against the guide rod piece, and the other end of the second elastic piece is abutted against the locking handle; the unlocking button is hinged to one end, far away from the clamping rod piece, of the locking handle and comprises an executing piece corresponding to the holding rod piece.

Preferably, the condyle holding device further comprises: and one end of the third elastic piece is abutted to the locking handle, and the other end of the third elastic piece is abutted to the unlocking button.

Preferably, the condyle holding device further comprises: the sleeve is sleeved on the clamping rod piece, one side of the sleeve is hinged to the first elastic piece, and one end of the sleeve is abutted to the stop arranged on the clamping rod piece.

Preferably, the condyle holding device further comprises: and the fourth elastic piece is positioned at one end of the stop, which is far away from the sleeve, one end of the fourth elastic piece is abutted against the stop, and the other end of the fourth elastic piece is abutted against the holding rod piece.

Preferably, the holding rod piece comprises a butt joint piece close to one side of the block piece, and a slot is formed in the butt joint piece; the block piece comprises a bulge close to one side of the holding rod piece, the bulge corresponds to the groove, and a plurality of grooves are formed in the side wall of the bulge; the butt joint piece is provided with a plurality of through holes, the through holes correspond to the grooves one to one, each through hole is internally provided with a plunger, a fifth elastic piece and a ball body in sequence, and the ball bodies fall into the grooves.

Preferably, the block piece comprises an arc surface located at one end far away from the holding rod piece.

Preferably, the block piece comprises a waist-shaped through hole arranged in the middle of the block piece; the clamping rod piece comprises an oval column section close to one end of the hook.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention discloses a middle condyle holding device, which utilizes a block to generate a pressing action on a bending convex surface of a femoral condyle prosthesis or a prosthesis test mould, utilizes a hook to generate a hook locking action on a bending concave surface of the femoral condyle prosthesis or the prosthesis test mould, and forms double-sided clamping on the femoral condyle prosthesis or the prosthesis test mould under the pressing action and the hook locking action, thereby realizing middle holding of the femoral condyle prosthesis or the prosthesis test mould, reducing the occupied space of instruments, avoiding the condyle holding device from interfering with cortex as much as possible, reducing the risk of operation and having a promoting effect on realizing minimally invasive surgery;

2. according to the middle condyle holding device disclosed by the invention, the hook is used for locking the femoral condyle prosthesis or prosthesis test mold under the hook locking effect of the hook by using the components such as the locking handle and the like, and the locking effect is further reinforced by using the components such as the first elastic part and the like, so that the condyle holding device is used for stably and effectively clamping the femoral condyle prosthesis or prosthesis test mold;

3. according to the middle condyle holding device disclosed by the invention, after the femoral condyle prosthesis or the prosthesis test model is implanted into the distal femur, the middle condyle holding device is separated from the femoral condyle prosthesis or the prosthesis test model, so that the middle condyle holding device can serve as a impactor to knock the prosthesis without replacing other instruments, the knocking force is transmitted with the block piece through the holding rod piece, and the use mode is simple.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a perspective view of a medial condyle holder in accordance with an embodiment of the present invention;

fig. 2 is a perspective view of a holding bar in an embodiment of the present invention;

FIG. 3 is a perspective view of a block in an embodiment of the invention;

FIG. 4 is a cross-sectional view of a medial condyle holder in a free state according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a medial condyle holder in an initial clamping state according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a medial condyle holder in a fully clamped state in an embodiment of the present invention;

FIG. 7 is a perspective view of a medial condyle holder holding a femoral condyle prosthesis or a trial in an embodiment of the present invention;

in the figure:

the device comprises a holding rod piece 1, an abutting piece 1-1, a groove 1-11, a through hole 1-12, a plunger 1-13, a fifth elastic piece 1-14, a sphere 1-15, a first notch 1-2, a platform 1-3 and a second notch 1-4;

the block piece 2, the bulge 2-1, the groove 2-11, the cambered surface 2-2, the waist-shaped through hole 2-3 and the holding groove 2-4;

the device comprises a clamping rod piece 3, a hook 3-1, a stopper 3-2 and an oval column section 3-3;

the locking handle 4, the handle body 4-1, the second teeth 4-11, the through grooves 4-12 and the first elastic piece 4-2;

the locking block 5 is provided with a first tooth 5-1;

a connecting rod 6;

a guide bar 7;

a second elastic member 8;

an unlocking button 9 and an executing part 9-1;

a third elastic member 10;

a sleeve 11;

a fourth elastic member 12.

Detailed Description

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

Example (b): the embodiment provides a best scheme of a middle condylar holding device, which specifically comprises a holding rod 1 and a block member 2, wherein one end of the block member 2 is connected with the holding rod 1, when the condylar holding device performs condylar holding action, one end of the block member 2, which is far away from the holding rod 1, generates pressing action on a bending convex surface of a femoral condylar prosthesis or prosthesis test mold, the middle condylar holding device also comprises a clamping rod 3, one end of the clamping rod 3 is connected with the holding rod 1 in a sliding manner, the clamping rod 3 penetrates through the block member 2, a hook 3-1 is arranged at one end penetrating through the block member 2, when the condylar holding device performs condylar holding action, the clamping rod 3 penetrates through the condyles of the femoral condylar prosthesis or prosthesis test mold, generates hooking and locking action on the bending convex surface of the femoral condylar prosthesis or prosthesis test mold, under the pressing action of the block member 2 and the hooking and locking action of the clamping rod 3, the femoral condyle prosthesis or the prosthesis test mold is stably clamped, the middle of the femoral condyle prosthesis or the prosthesis test mold is held, the condyle holding device is prevented from interfering with the cortex, the operation risk is reduced, and the minimally invasive surgery is promoted;

further, as shown in fig. 1, after the femoral condyle prosthesis or the prosthesis trial mold is installed in place, the condyle holding device can be used as a driver to knock the prosthesis, specifically, the holding rod member 1 comprises a platform 1-3 far away from one end of the block member 2, when the condyle holding device is used, the hammer is used for applying force to the platform 1-3, the knocking force is transmitted to the femoral condyle prosthesis or the prosthesis trial mold through the holding rod member 1 and the block member 2, and the instrument does not need to be replaced;

further, in order to realize the compact structure of the condyle holding device, as shown in fig. 1 and 4, a first notch 1-2 is formed in the holding rod 1, the clamping rod 3 is placed in the first notch 1-2, one end of the clamping rod 3 passes through a side wall of the first notch 1-2, and the other end of the clamping rod 3 passes through an end surface of the holding rod 1, so that the sliding connection between the holding rod 1 and the clamping rod 3 is realized;

further, as shown in fig. 1, in order to avoid the rotation of the clamping rod piece 3 in the clamping process, the block piece 2 comprises a waist-shaped through hole 2-3 arranged in the middle of the block piece, the clamping rod piece 3 comprises an elliptical column section 3-3 close to one end of the hook 3-1, and when the clamping rod piece 3 passes through the block piece 2, the waist-shaped through hole 2-3 corresponds to the elliptical column section 3-3 to generate the rotation stopping effect on the clamping rod piece 3;

further, as shown in fig. 1, in order to realize effective clamping of the femoral condyle prosthesis or the prosthesis trial mold, the block 2 includes an arc surface 2-2 located at one end far away from the holding rod 1, and the arc surface 2-2 can improve the clamping area with the femoral condyle prosthesis or the prosthesis trial mold, thereby improving the clamping stability;

furthermore, the condyle holding device is used as a reusable instrument and needs to be cleaned and sterilized after an operation, and further the holding rod 1 and the block 2 are detachably connected, specifically, as shown in fig. 2-3, the holding rod 1 comprises a butt joint part 1-1 close to one side of the block 2, a slot 1-11 is arranged on the butt joint part 1-1, the block 2 comprises a protrusion 2-1 close to one side of the holding rod 1, the protrusion 2-1 corresponds to the slot 1-11, the slot 1-11 is preferably a cross-shaped slot, the protrusion 2-1 is preferably a cross-shaped protrusion, the slot 1-11 is attached to the protrusion 2-1, the holding rod 1 is connected with the block 2, and meanwhile, the holding rod 1 and the block 2 are prevented from rotating;

more specifically, as shown in fig. 2-3, a plurality of grooves 2-11 are formed in the side wall of a protrusion 2-1, a plurality of through holes 1-12 are formed in an abutting piece 1-1, the plurality of through holes 1-12 correspond to the plurality of grooves 2-11 one by one, a plunger 1-13, a fifth elastic piece 1-14 and a ball 1-15 are sequentially arranged in each through hole 1-12, the plunger 1-13 is used for preventing the fifth elastic piece 1-14 from falling off, the ball 1-15 falls into the groove 2-11 under the elastic action of the fifth elastic piece 1-14, so that a clamping effect is formed on a block piece 2, and the diameter of the opening end of the through hole 1-12 at the ball 1-15 position is smaller than the diameter of the ball 1-15 and is used for preventing the ball 1-15 from falling off;

furthermore, as shown in fig. 3, a holding groove 2-4 is formed in the side wall of the block 2, and when the block 2 needs to be separated from the rod 1, the holding groove 2-4 is held to apply force to the block 2, so that the block 2 is separated from the rod 1;

further, in order to prevent the femoral condyle prosthesis or the prosthesis trial mold from falling off in the implantation process, the hook 3-1 needs to be used for locking the femoral condyle prosthesis or the prosthesis trial mold, specifically, as shown in fig. 1 and 4, the condyle holding device further comprises a locking handle 4, one end of the locking handle 4 is hinged to the clamping rod 3, the locking handle 5 is slidably connected with the locking handle 4, first teeth 5-1 are arranged on the locking block 5, the first teeth 5-1 correspond to second teeth 4-11 arranged on the locking handle 4, the connecting rod 6 is further included, one end of the connecting rod 6 is hinged to the middle of the holding rod 1, the other end of the connecting rod 6 is hinged to the locking block 5, an included angle between the locking handle 4 and the connecting rod 6 is an acute angle, and at this time, the clamping rod 3 is in an unclamped state;

referring to fig. 4, when the clamping rod 3 needs to be locked, the locking handle 4 is forced to gradually close the space between the locking handle 4 and the holding rod 1, and the driving link 6 and the holding rod 1 are also gradually closed, in the process, the closing angle of the connecting rod 6 is larger than that of the locking handle 4, so that the gap between the locking block 5 and the locking handle 4 is reduced, meanwhile, the connecting rod 6 pushes the locking block 5 to make the locking block 5 and the locking handle 4 generate relative displacement, when the hinge point A of the locking handle 4 and the clamping rod 3, the hinge point B of the connecting rod 6 and the holding rod 1, and the hinge point C of the connecting rod 6 and the locking block 5 are in the same straight line as shown in figure 5, the first tooth 5-1 and the second tooth 4-11 are completely meshed, no relative displacement or relative rotation exists between the locking handle 4 and the connecting rod 6, and the clamping rod piece 3 is locked by the locking handle 4;

further, in order to avoid that the clamping force of the locking handle 4 on the clamping rod 3 is small, or the engaging force of the first tooth 5-1 and the second tooth 4-11 is insufficient, so that the clamping is loosened, as shown in fig. 4, the locking handle 4 further comprises a handle body 4-1 and a first elastic member 4-2, the first elastic member 4-2 is preferably an elastic arm, wherein the locking block 5 is slidably connected with the handle body 4-1, the first tooth 5-1 is arranged in a through groove 4-12 formed in the handle body 4-1, one end of the first elastic member 4-2 is integrally formed with the handle body 4-1, and the other end of the first elastic member 4-2 is hinged to the clamping rod 3;

thus, the clamping rod member 3 can be further locked, specifically, as shown in fig. 4, the force is continuously applied to the locking handle 4, so that the space between the locking handle 4 and the holding rod member 1 is further closed, as shown in fig. 6, a hinge point a of the locking handle 4 and the clamping rod member 3, a hinge point B of the connecting rod 6 and the holding rod member 1, and a hinge point C of the connecting rod 6 and the locking block 5 form a folding line, when the locking handle 4 and the connecting rod 6 fall into the second notch 1-4 formed in the holding rod member 1, the first elastic member 4-2 deforms to generate tension, so as to further lock the clamping rod member 3, and meanwhile, the states of the locking handle 4 and the connecting rod 6 are more stable;

further, as shown in fig. 4, the condyle holding device further includes a sleeve 11, the sleeve 11 is sleeved on the clamping rod 3, one side of the sleeve 11 is hinged to the first elastic member 4-2, one end of the sleeve 11 is abutted to a stop 3-2 arranged on the clamping rod 3, the stop 3-2 is an annular member and is connected to the clamping rod 3 through a pin, and the sleeve 11 and the stop 3-2 are matched through a key slot to complete the hinged matching between the first elastic member 4-2 and the clamping rod 3;

furthermore, after implanting the femoral condyle prosthesis or the prosthesis trial mold in place, the holding force of the condyle holding device on the prosthesis or the prosthesis trial mold needs to be removed, therefore, as shown in fig. 4, the condyle holding device further includes a guide rod 7, one end of the guide rod 7 is hinged to the locking block 5, the other end of the guide rod 7 passes through the locking handle 4, so that the guide rod 7 and the locking handle 4 can be relatively displaced, i.e. the locking block 5 and the locking handle 4 are slidably connected, the condyle holding device further includes a second elastic member 8, one end of the second elastic member 8 abuts against the guide rod 7, the other end of the second elastic member 8 abuts against the locking handle 4, the second elastic member 8 is preferably a spring, and is sleeved on the guide rod 7, when applying a force to the locking handle 4, the locking block 5 and the locking handle 4 are relatively displaced, so that the second elastic member 8 is compressed to be deformed, and further includes an unlocking button 9, the unlocking button 9 is hinged to one end of the locking handle 4, which is far away from the clamping rod piece 3, and the unlocking button 9 comprises an executing piece 9-1 corresponding to the holding rod piece 1;

when the clamping force of the condyle holding device on the prosthesis or the trial mold needs to be removed, as shown in fig. 4, the unlocking button 9 is applied with force to drive the executing part 9-1 to generate acting force on the inner wall of the second notch 1-4 of the holding rod part 1, the inner wall of the second notch 1-4 generates reacting force on the executing part 9-1 to drive the locking handle 4 to separate from the holding rod part 1, the first elastic part 4-2 recovers and deforms along with the trend to generate elastic force, the locking handle 4 is continuously driven to separate from the holding rod part 1, so that the meshing between the first tooth 5-1 and the second tooth 4-11 is loosened, the second elastic part 8 rebounds along with the trend to generate elastic force to drive the connecting rod 6 to separate from the holding rod part 1, and the action of removing the clamping force is completed;

further, as shown in fig. 4, in order to ensure that the end surfaces of the unlocking button 9 and the locking handle 4 are always kept in an open state, the condyle holding device further includes a third elastic member 10, one end of the third elastic member 10 abuts against the locking handle 4, and the other end abuts against the unlocking button 9, the third elastic member 10 is preferably a spring, and in order to prevent the third elastic member 10 from falling, the third elastic member 10 is sleeved on the guide rod 7;

further, after the clamping force of the condylar holder on the prosthesis or the trial mold is removed, as shown in fig. 4, the clamping rod 3 needs to be reset to a certain degree so as to prevent the hook 3-1 of the clamping rod 3 from interfering with the prosthesis or the trial mold when the clamping force is removed, so that the condylar holder further comprises a fourth elastic member 12, the fourth elastic member 12 is located at one end of the stopper 3-2 far away from the sleeve 11, one end of the fourth elastic member 12 abuts against the stopper 3-2, and the other end of the fourth elastic member 12 abuts against the holding rod 1.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A medial condyle holder, comprising:

a holding rod;

the block piece is connected with the holding rod piece at one end;

and one end of the clamping rod piece is connected with the holding rod piece in a sliding manner, the clamping rod piece penetrates through the block piece, and a hook is arranged at one end penetrating through the block piece.

2. The medial condyle holder according to claim 1, wherein the condyle holder further comprises:

the locking handle, one end of the said locking handle is hinged with the said grip member bar;

the locking block is connected with the locking handle in a sliding mode, first teeth are arranged on the locking block, and the first teeth correspond to second teeth arranged on the locking handle;

one end of the connecting rod is hinged with the holding rod piece, and the other end of the connecting rod is hinged with the locking block;

the locking handle and the connecting rod form an acute angle.

3. The medial condyle holder according to claim 2, wherein the locking handle comprises:

the locking block is connected with the handle body in a sliding mode, and the first teeth are arranged on the handle body;

one end of the first elastic piece is connected with the handle body, and the other end of the first elastic piece is hinged with the clamping rod piece.

4. The medial condyle holder according to claim 2 or 3, wherein the condyle holder further comprises:

one end of the guide rod piece is hinged with the locking block, and the other end of the guide rod piece penetrates through the locking handle, so that the guide rod piece and the locking handle can generate relative displacement;

one end of the second elastic piece is abutted against the guide rod piece, and the other end of the second elastic piece is abutted against the locking handle;

the unlocking button is hinged to one end, far away from the clamping rod piece, of the locking handle and comprises an executing piece corresponding to the holding rod piece.

5. The medial condyle holder according to claim 4, wherein the condyle holder further comprises:

and one end of the third elastic piece is abutted to the locking handle, and the other end of the third elastic piece is abutted to the unlocking button.

6. The medial condyle holder according to claim 2, wherein the condyle holder further comprises:

the sleeve is sleeved on the clamping rod piece, one side of the sleeve is hinged to the first elastic piece, and one end of the sleeve is abutted to the stop arranged on the clamping rod piece.

7. The medial condyle holder according to claim 6, wherein the condyle holder further comprises:

and the fourth elastic piece is positioned at one end of the stop, which is far away from the sleeve, one end of the fourth elastic piece is abutted against the stop, and the other end of the fourth elastic piece is abutted against the holding rod piece.

8. A medial condyle holder according to any one of claims 1 to 3, wherein:

the holding rod piece comprises a butt joint piece close to one side of the block piece, and a groove is formed in the butt joint piece;

the block piece comprises a bulge close to one side of the holding rod piece, the bulge corresponds to the groove, and a plurality of grooves are formed in the side wall of the bulge;

the butt joint piece is provided with a plurality of through holes, the through holes correspond to the grooves one to one, each through hole is internally provided with a plunger, a fifth elastic piece and a ball body in sequence, and the ball bodies fall into the grooves.

9. A medial condyle holder according to any one of claims 1 to 3, wherein: the block piece comprises an arc surface located at one end far away from the holding rod piece.

10. A medial condyle holder according to any one of claims 1 to 3, wherein:

the block piece comprises a waist-shaped through hole arranged in the middle of the block piece;

the clamping rod piece comprises an oval column section close to one end of the hook.