CN209695304U - Proximal tibia osteotomy device - Google Patents

Abstract

A proximal tibial osteotomy device, comprising a connecting rod with a pointer mounted on the connecting rod of a condyle holder, a tibial osteotomy guide plate mounted on the connecting rod with a pointer, and two osteotomy thicknesses mounted on the tibial osteotomy guide A limiter, the tibial osteotomy guide plate includes a tibial fixation plate matching the radian of the tibia and a connecting plate fixed on the tibial fixation plate, the connecting plate and the pointer end with the pointer connecting rod are connected by a pressure screw, The connecting plate can be rotated relative to the connecting rod with a pointer. The tibial fixation plate is provided with an osteotomy saw blade guide groove, positioning round holes and nail holes. The two positioning round holes are along the length of the osteotomy saw blade guide groove. The center line of the side is symmetrically arranged on the tibial fixation plate. The utility model is convenient to adjust, and can also determine and limit the osteotomy thickness in the vertical direction when the tibial osteotomy guide plate is turned inward. The osteotomy angle is the patient's physiological varus and varus angle. , to achieve dynamic alignment in knee arthroplasty, which is conducive to the rapid recovery of patients, in order to improve the satisfaction of knee joint activities of patients after arthroplasty.

Description

A kind of proximal tibial osteotomy device

technical field

The utility model relates to a proximal tibial osteotomy device.

Background technique

Total knee arthroplasty is a widely used and highly effective treatment for patients with advanced knee disease. Alignment technique is the basis of knee arthroplasty, which refers to the method of osteotomy and prosthesis installation according to the alignment during arthroplasty. The current traditional alignment method is mechanical axis alignment, that is, osteotomy and prosthesis installation are performed according to the mechanical axis of the lower limb formed by the center of the femoral head-knee joint center-ankle joint center. The axis of rotation is perpendicular to the mechanical axis without inclination, but with this alignment technique, the axis of rotation formed is inconsistent with the axis of motion of the individual knee joint of the patient. Therefore, after total knee arthroplasty, the patient cannot fully recover the axis of motion of the physiological motion, which may It will affect the effect of joint replacement surgery, and then affect the follow-up quality of life of patients; in order to solve the above problems, the dynamic alignment theory has emerged in recent years, that is, to perform osteotomy and install prosthesis according to the individual knee joint movement axis of the patient. It is hoped that the patient's axis of motion can be fully restored, but the human tibia is inherently varus, so according to the dynamic alignment theory, the tibia should also be kept in varus for osteotomy, and the current surgical device requires manual adjustment of the osteotomy The inversion angle of the module is realized, and the accuracy is poor.

Utility model content

The utility model solves the deficiency of the prior art and provides a tibial proximal osteotomy device which is convenient for adjustment and realizes the adjustment of the varus and varus angle of the tibia.

In order to achieve the above object, the utility model adopts the following technical solutions:

A proximal tibial osteotomy device, comprising a connecting rod 3 with a pointer installed on the connecting rod 4 of a condyle holder, a tibial osteotomy guide plate 2 installed on the connecting rod 3 with a pointer, and a tibial osteotomy guide plate 2 installed on the connecting rod 4 Two osteotomy thickness limiters 1,

The tibial osteotomy guide plate 2 includes a tibial fixation plate 26 that matches the radian of the tibia and a connecting plate 25 fixed on the tibial fixation plate 26, and the connecting plate 25 and the pointer end 31 of the connecting rod 3 with a pointer are added to each other. The pressure screw 32 is connected so that the connecting plate 25 can be rotated relative to the connecting rod 3 with the pointer as the axis of the pressing screw, and the angle relationship between the connecting plate 25 and the connecting rod 3 with the pointer can be fixed by tightening the pressing screw. The fixing plate 26 is provided with an osteotomy saw blade guide groove 21, a positioning circular hole 24 and a nail hole 22, and the two positioning circular holes 24 are symmetrically arranged on the tibial fixation center along the center line of the long side of the osteotomy saw blade guide groove 21. plate 26;

The osteotomy thickness limiter 1 includes a vertical moving device, a positioning rod 14 for positioning the vertical moving device on the tibial fixation plate 26, and a pen needle 12 for feeding back the thickness of the tibia to be sawed off to the tibial osteotomy guide plate 2. The needle 12 is L-shaped, the end of the horizontal end of the pen needle 12 is installed on the action end of the vertical moving device, and the end of the vertical end of the pen needle 12 is in contact with the highest end or the lowest end surface of the inner and outer tibia bone surface, so The positioning rod 14 is installed on the bottom of the vertical moving device. The positioning rod 14 is L-shaped, and the end of the vertical end of the positioning rod 14 is movably installed on the bottom of the adjustment cylinder 15, so that the positioning rod 14 can adjust the central axis of the cylinder 15 to Center rotation, the end of the horizontal end of the positioning rod 14 matches the size of the positioning hole 24, the positioning rod 14 is inserted in the positioning hole 24, and the positioning rod 14 can be placed in the positioning hole Turn within 24.

Further, the vertical moving device is a screw drive mechanism.

Further, the vertical moving device includes an adjustment cylinder 15 with an open upper end and a hollow middle part. An adjustment screw 11 that can rotate around the axis is coaxially installed in the adjustment cylinder 15. The adjustment cylinder 15 is provided with a A guide groove arranged in the axial direction and communicated with the interior of the adjustment cylinder 15, a slider is installed in the position of the guide groove in the adjustment cylinder 15, the slider is screwed on the adjustment screw 11, and the pen needle 12 is fixed on the The slider is linked with the slider, and the adjusting screw 11 and the slider form a screw driving mechanism.

Further, the adjustment barrel 15 is provided with a thickness scale 13 along the guide groove for displaying the distance of the pen needle 12 moving up and down.

Further, the pressurizing screw is provided with a nut that is convenient for hand-twisting.

Further, the connecting plate 25 is provided with an angle scale 23 for displaying the rotation angle of the connecting rod 3 with a pointer, and the position of the angle scale 23 matches the position of the pointer end 31 of the connecting rod 3 with a pointer.

Further, the end of the vertical end of the pen needle 12 faces the side of the tibia as a plane 121 for convenient positioning, and the positioning accuracy of the positioning is ensured through the positioning of the plane of the pen needle 12 and the tibial plane.

Due to the adoption of the above-mentioned structure, the device determines the center of the ankle joint through the ankle-holding device 5, the connecting rod 4 of the ankle-holding device and the connecting rod 3 with pointers determine the mechanical axis of the tibia, and then adjusts the osteotomy thickness limiter 1 on both sides of the tibial osteotomy guide plate , adjust the position of the pen needle 12 to the set position according to the thickness scale 13, and then put the ends of the two pen needles 12 in contact with the highest position and the lowest position of the medial and lateral plateau bone surface of the tibia respectively, so that the thickness of the two osteotomies is limited The height of the end of the positioning rod 14 on the device 1 changes. Since the positioning rod 14 can rotate in the positioning hole 24, the tibial fixation plate 26 will rotate on the connecting rod 3 with a pointer according to the angle of the osteotomy thickness limiter 1. At the same time, the pointer 31 with pointer connecting rod 3 shows the angle of varus and varus. After confirming that the angle is correct, tighten the pressure screw 32 to fix the tibial osteotomy guide plate 2 and the connecting rod with pointer 3. After fixing, pass through the tibial osteotomy guide plate 2 fix the tibial osteotomy guide plate 2 on the tibia, and then remove the osteotomy thickness limiter 1 to reveal the osteotomy saw blade guide groove 21 on the tibial osteotomy guide plate 2, and insert it into the oscillating saw to complete the End osteotomy. By adopting the above method, when the tibial osteotomy guide plate is turned inward, the thickness of the osteotomy can also be determined and limited in the vertical direction, so as to realize the varus osteotomy of the tibia.

In summary, the utility model solves the deficiencies of the prior art and provides a device for proximal tibial osteotomy with high precision, convenient adjustment, and realization of proximal tibial osteotomy, so as to realize the power of knee joint replacement surgery. By learning the alignment, the patient's knee joint movement axis maintains the original angle after surgery, which is conducive to the rapid recovery of the patient, in order to improve the satisfaction of the knee joint movement and the quality of life of the patient after the replacement.

Description of drawings

Fig. 1 is a perspective view of the utility model.

Fig. 2 is the front view of the utility model.

Fig. 3 is a schematic structural view of the osteotomy thickness limiter of the present invention.

Fig. 4 is a schematic structural view of the tibial osteotomy guide plate of the present invention.

In the accompanying drawings, 1, osteotomy thickness limiter; 2, tibial osteotomy guide plate; 11, adjustment screw; 12, pen needle; 121, plane; 13, thickness scale; 14, positioning rod; 15, adjustment cylinder; 21, Osteotomy saw blade guide groove; 22, nail hole; 23, angle scale; 24, positioning round hole; 25, connecting plate; 26, tibial fixation plate; 3, connecting rod with pointer; 31, pointer end; 32, pressurization Screw rod; 4, the condyle-holding device connecting rod; 5, the condyle-holding device.

Detailed ways

In order to better understand the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and implementation examples, but the implementation of the utility model is not limited thereto, and the scope of protection of the utility model also involves those skilled in the art according to the present invention. Equivalent technical means conceivable by the utility model concept.

As shown in Figures 1 to 4, a proximal tibial osteotomy device comprises a connecting rod 3 with a pointer installed on the connecting rod 4 of the condyle holder, a tibial osteotomy guide plate 2 installed on the connecting rod 3 with a pointer, and an installation Two osteotomy thickness limiters 1 on the tibial osteotomy guide plate 2,

The tibial osteotomy guide plate 2 includes a tibial fixation plate 26 matching the radian of the tibia and a connecting plate 25 fixed on the tibial fixing plate 26, and the connecting plate 25 and the pointer end 31 of the connecting rod 3 with a pointer are pressurized The screw rod 32 is connected so that the connecting plate 25 can rotate relative to the connecting rod 3 with a pointer. The tibial fixation plate 26 is provided with an osteotomy saw blade guide groove 21, a positioning circular hole 24 and a nail hole 22. The two positioning The round hole 24 is symmetrically arranged on the tibial fixation plate 26 along the center line of the long side of the osteotomy saw blade guide groove 21; Correspondingly be provided with through-hole on the described connecting rod 3 with pointer, be provided with the nut that is convenient to spin on the described pressure screw rod, when connecting plate 25 is fixed with the connecting rod 3 with pointer, by rotating the pressure screw rod 32, make connection The plate 25 and the connecting rod 3 with pointer are tightly pressed to realize fixing; the connecting plate 25 is provided with an angle scale 23 for displaying the rotation angle of the connecting rod 3 with a pointer, and the position set by the angle scale 23 is the same as that of the connecting rod 3 pointer with a pointer. end 31 position matches.

The osteotomy thickness limiter 1 includes a vertical moving device, a positioning rod 14 for positioning the vertical moving device on the tibial fixation plate 26, and a pen needle 12 for feeding back the thickness of the tibia to be sawed off to the tibial osteotomy guide plate 2, the vertical The moving device includes an adjustment cylinder 15 with an open upper end and a hollow middle part. An adjustment screw 11 that can rotate around the axis is coaxially installed in the adjustment cylinder 15. The adjustment cylinder 15 is provided with axially arranged, A guide groove communicating with the interior of the adjustment cylinder 15, a slider is installed at the position of the guide groove in the adjustment cylinder 15, the slider is screwed on the adjustment screw 11, and the pen needle 12 is fixed on the slider and The slider is linked, and the adjusting screw 11 and the slider form a screw driving mechanism; the adjusting cylinder 15 is provided with a thickness scale 13 along the guide groove for displaying the vertical movement distance of the pen needle 12 .

The pen needle 12 is L-shaped, the end of the horizontal end of the pen needle 12 is installed on the action end of the vertical moving device, and the end of the vertical end of the pen needle 12 is in contact with the highest end or the lowest end surface of the inner and outer tibia bone surface Contact, the positioning rod 14 is installed at the bottom of the vertical moving device, the positioning rod 14 is L-shaped, and the end of the vertical end of the positioning rod 14 is movably installed on the bottom of the adjustment cylinder 15, so that the positioning rod 14 can adjust the cylinder 15 The central axis is the center rotation, and the end of the horizontal end of the positioning rod 14 matches the size of the positioning round hole 24. The positioning rod 14 is inserted in the positioning round hole 24, and the positioning rod 14 can be placed in the Rotate in the positioning circular hole 24.

In this embodiment, the end of the vertical end of the pen needle 12 faces the side of the tibia as a plane 121 for easy positioning, and the positioning accuracy of the positioning is ensured through the positioning of the plane of the pen needle 12 and the tibial plane.

When in use, first fix the ankle joint 5 on the ankle joint, determine the center of the ankle joint through the ankle joint 5, connect the connecting rod 3 with the ankle joint 4 with the ankle joint 4, connect the ankle joint 4 with the pointer The connecting rod 3 determines the mechanical axis of the tibia, and then adjusts the osteotomy thickness limiter 1 on both sides of the tibial osteotomy guide plate, adjusts the position of the pen needle 12 to the set position according to the thickness scale 13, and then aligns the ends of the two pen needles 12 contact with the highest position and the lowest position of the tibial medial and lateral platform bone surface respectively, so that the heights of the ends of the positioning rods 14 on the two osteotomy thickness limiters 1 change, because the positioning rods 14 can rotate in the positioning circular holes 24 , so that the tibial fixation plate 26 will rotate on the connecting rod 3 with the pointer according to the angle of the osteotomy thickness limiter 1, and the pointer 31 of the connecting rod 3 with the pointer will display the angle of varus and varus at the same time. After confirming that the angle is correct, tighten the pressure screw 32, fix the tibial osteotomy guide plate 2 and the connecting rod with pointer 3, fix the tibial osteotomy guide plate 2 on the tibia through the nail hole 22 on the tibial osteotomy guide plate 2 after fixing, and then remove the osteotomy thickness limiter 1, The osteotomy saw blade guide groove 21 on the tibial osteotomy guide plate 2 is exposed, and the pendulum saw is inserted to complete the proximal tibial osteotomy. By adopting the above method, when the tibial osteotomy guide plate is turned inward, the thickness of the osteotomy can also be determined and limited in the vertical direction, so as to realize the varus osteotomy of the tibia.

In addition, it should be noted that this patent is not limited to the above-mentioned embodiments, as long as the specific size or shape of the parts is not specified, the parts can be of any size or shape that is suitable for its structure, regardless of its material composition. Any change, any use of the structural design provided by the utility model is a deformation of the utility model, and should be considered within the protection scope of the utility model.

Claims (7)

1. a kind of proximal tibia osteotomy device, it is characterised in that: connected including being mounted on the band pointer embraced in condyle device connecting rod (4) Bar (3) is mounted on the Tibial osteotomy guide plate (2) on pointer connecting rod (3) and be mounted on Tibial osteotomy guide plate (2) two Osteotomy thickness limit device (1),

The Tibial osteotomy guide plate (2) includes the shin bone fixed plate (26) to match with shin bone radian and is fixed on shin bone fixed plate (26) the pointer end (31) of the connecting plate (25) on, the connecting plate (25) and the band pointer connecting rod (3) passes through a pressurization Screw rod (32) connection, so that the connecting plate (25) can pressurize, screw rod (32) are axle center opposite band pointer connecting rod (3) rotation, The shin bone fixed plate (26) is equipped with osteotomy saw blade guide groove (21), positioning round orifice (24) and nail hole (22), two positioning Circular hole (24) is symmetricly set on shin bone fixed plate (26) centered on osteotomy saw blade guide groove (21) long side center line；

The osteotomy thickness limit device (1) includes vertical movement apparatus, vertical movement apparatus is located in shin bone fixed plate (26) On locating rod (14) and by it is for sawing remove needle (12) of the shin bone thickness feedback to Tibial osteotomy guide plate (2), described needle (12) For L-type, the end of the horizontal ends of described needle (12) is mounted on the motion end of vertical movement apparatus, described needle (12) vertical end End and shin bone in outside platform bone face most significant end or least significant end face contact, the locating rod (14), which is mounted on, to be vertically moved The bottom of device, the locating rod (14) are L-type, and the end of locating rod (14) vertical end is movably arranged on adjustment barrel (15) Bottom so that being rotated centered on locating rod (14) adjustable cylinder (15) central axis, the end of locating rod (14) horizontal ends Portion matches with the positioning round orifice (24) size, and the locating rod (14) is inserted into the positioning round orifice (24), and fixed Position bar (14) can the rotation in the positioning round orifice (24).

2. proximal tibia osteotomy device according to claim 1, it is characterised in that: the vertical movement apparatus is screw rod drive Motivation structure.

3. proximal tibia osteotomy device according to claim 2, it is characterised in that: the vertical movement apparatus includes upper end The hollow adjustment barrel (15) in opening, middle part, interior be coaxially installed with of the adjustment barrel (15) can be around the adjusting screw rod that axle center rotates (11), the adjustment barrel (15) is equipped with along guide groove axially laying, being connected to adjustment barrel (15) inside on side wall, described Adjustment barrel (15) inner slot position is equipped with sliding block, and the sliding block is screwed on adjusting screw rod (11), described needle (12) fixed to link on the slide block with sliding block, the adjusting screw rod (11) and sliding block form screw mandrel drive mechanism.

4. proximal tibia osteotomy device according to claim 3, it is characterised in that: the adjustment barrel (15) sets along guide groove Have for showing that a needle (12) moves up and down the thickness scale (13) of distance.

5. proximal tibia osteotomy device according to claim 1, it is characterised in that: on the pressurization screw rod and adjusting screw rod It is equipped with the nut for facilitating hand to revolve.

6. proximal tibia osteotomy device according to claim 1, it is characterised in that: the connecting plate (25) is equipped with and is used for The angle index (23) of display band pointer connecting rod (3) rotation angle, the position of the angle index (23) setting and with pointer Connecting rod (3) pointer end (31) position matches.

7. proximal tibia osteotomy device according to claim 1, it is characterised in that: the end of described needle (12) vertical end Towards shin bone one side for convenience of the plane of positioning.