CN104546087B - Front ankle bone cutting device - Google Patents

Abstract

The invention provides an anterior condyle osteotomy device, which comprises an osteotomy block, a base, a sleeve, a sliding nut, a lead screw, a nut and a column. On the anterior condyle osteotomy, the model of the prosthesis is marked according to the size of the anteroposterior diameter of the prosthesis. The nut is threaded for transmission, and the column on the base is adjusted to the corresponding scale position by rotating the nut. Compared with the traditional osteotomy plate, the anterior condyle osteotomy provides a function of adjusting the amount of osteotomy, and the osteotomy can be performed according to the needs of the operation. At the same time, the size of the femoral condyle can also be measured by marking the size model. An anterior face osteotomy integrates size measurement and anterior condyle osteotomy, which is as convenient as possible for doctors to use.

Description

anterior condylar osteotomy

technical field

The invention relates to an anterior condyle osteotomy, which is mainly used in total knee replacement in surgical implant artificial knee joint replacement. Specifically, it is a guide tool for osteotomy of the anterior face of the femoral condyle in knee replacement.

Background technique

The femoral condyle anterior condyle osteotomy tool has never appeared in artificial knee joint surgery, and it is an osteotomy guiding tool in artificial knee joint replacement surgery. In artificial knee replacement surgery, after determining the size and model of the femoral condyle in the previous step, the doctor adjusts the anterior condyle osteotomy to the scale position of the corresponding model, and the rear reference is changed to the anterior reference. Anterior condylar osteotomy.

Common femoral condyle osteotomy tools are "four-in-one" osteotomy, the anterior condyle osteotomy is added to the "four-in-one" osteotomy plate, this common femoral side osteotomy plate is positioned by a round nail , cannot be adjusted. If it needs to be adjusted, it can only be repositioned and installed by positioning equipment. This will delay the operation process, reduce the quality of the operation, and bring more pain to the patient, which cannot be tolerated.

Although some companies use measures such as multiple fixed-distance fixing nails and adding adjustment bone plates to solve this problem, the effect is very poor due to limitations of many factors such as the method of use.

To sum up, there is still a great demand for femoral osteotomy tools for knee joint replacement surgery that are easy to use, simple in structure, and easily adjustable.

Contents of the invention

The object of the present invention is to provide an anterior condyle osteotomy that integrates femoral condyle size measurement and anterior condyle osteotomy, has high osteotomy precision, is simple in design, and saves operation time.

To achieve the above object, the present invention provides an anterior condyle osteotomy, which is characterized in that it consists of an osteotomy block, a base, a sleeve, a sliding nut, a lead screw, a nut and a column. The osteotomy block is provided with an osteotomy groove, and a column is fixed on the base, and the osteotomy block is slidably set on the column, and the anterior condyle osteotomy is provided with a device for adjusting the base A threaded adjustment device for the relative height of the osteotomy block.

Preferably, the screw adjusting device includes a sliding nut fixedly positioned with the base and a lead screw matched with the sliding nut, the lead screw is fixedly and rotatably connected to the osteotomy block, the screw The central axis of the bar is parallel to the arrangement of the uprights.

Preferably, the osteotomy block is provided with a sleeve for accommodating the lead screw, the bottom of the sleeve is provided with a U-shaped through groove, and the sliding nut can move up and down in the U-shaped groove of the sleeve.

Preferably, one end of the lead screw is fixed with an adjusting nut that drives the lead screw to rotate.

Preferably, the osteotomy block is provided with oblique nail holes for fixing the osteotomy block and the osteotomy section at the distal end of the femoral condyle, and the base is provided with two straight nail holes for external rotation and fixation.

Preferably, a scale is provided on the column, and the direction of the scale is parallel to the height direction of the column.

The anterior condyle osteotomy of the present invention can adjust the osteotomy block to the optimal position according to the size of the femoral condyle through thread transmission, which is difficult to adjust in the previous "four-in-one" osteotomy process. The external rotation angle of the femur is determined through the two straight nail holes on the base. If there is a defect in the posterior femoral condyle, a fixing screw can be pulled out to adjust a suitable external rotation angle to ensure the accuracy of the osteotomy. Since the size model scale is marked on the osteotomy block of the anterior condylar osteotomy, the anterior condylar osteotomy can be used as a femoral condyle size measurement tool while using the anterior condylar osteotomy.

Description of drawings

Fig. 1 is a schematic diagram of assembly and installation of the anterior condyle osteotomy of the present invention.

The marks in the attached drawings are as follows:

1 is an osteotomy block, 2 is a base, 3 is a sleeve, 4 is a sliding nut, 5 is a lead screw, 6 is a nut, and 7 is a column.

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described as follows:

As shown in FIG. 1 , an anterior condylar osteotomy device includes an osteotomy block 1 , a base 2 , a sleeve 3 , a sliding nut 4 , a lead screw 5 , a nut 6 and a column 7 . The osteotomy block 1 is provided with an osteotomy slot, the base 2 is fixed with a column 7, the osteotomy block 2 is slidably set on the column 7, and the anterior condyle osteotomy is set There is a screw adjusting device for adjusting the relative height of the base 2 and the osteotomy block 1 . During the procedure, the doctor makes height adjustments by turning the threads. The thread adjusting device includes a sliding nut 4 fixedly positioned with the base 2 and a screw 5 matched with the sliding nut 4, the screw 5 is fixedly and rotatably connected to the osteotomy block 1, The central axis of the lead screw 5 is arranged parallel to the column 7 . The sliding nut 4 is connected to the lead screw 5 through fastening threads, the structure is simple and the stability of the connection is ensured, and no shaking occurs during use. The osteotomy block 1 is provided with a sleeve 3 for accommodating the lead screw 5 , the bottom of the sleeve 3 is provided with a U-shaped through groove, and the sliding nut 4 can move up and down in the U-shaped groove of the sleeve 3 . The sleeve 3 effectively protects the lead screw from being exposed and is safe, and the lead screw 5 is not easy to wear and rust, and the U-shaped groove design ensures the movement track of the sliding nut 4 .

One end of the screw 5 is fixed with an adjusting nut 6 that drives the screw to rotate. The nut 6 and the leading screw 5 are connected by welding. During the operation, the doctor drives the leading screw 5 to rotate by rotating the nut 6, and the leading screw 5 is threadedly connected with the sliding nut 4 to drive the sliding nut 4 to move up and down. The sliding nut 4 is welded in the right through hole of the osteotomy block 1 to drive the osteotomy block 1 to move up and down, which is convenient for adjustment and high in precision. The osteotomy block 1 is provided with oblique nail holes for fixing the osteotomy block 1 and the osteotomy section of the distal end of the femoral condyle, and the base 2 is provided with two straight nail holes for external rotation and fixation. The doctor puts two fixation nails on the osteotomy surface of the distal femoral condyle at a certain angle to the horizontal plane through the straight nail holes to realize external rotation determination and preliminary fixation. The column 7 is provided with a scale, and the direction of the scale is parallel to the height direction of the column 7 . The marked scale is marked according to the size and model of the anteroposterior diameter of the prosthesis. During the operation, the doctor passes the fixation nail through the oblique nail hole on the osteotomy block 1 for final fixation. Adjust the column 7 to the size determined in the previous step, and finally pass the pendulum saw through the osteotomy groove to complete the osteotomy of the anterior condyle of the femur.

Claims (4)

1. a kind of front ankle bone cutting device, including the osteotomy block being connected with the base of preartis bone fixation and with the base, its feature exists In the osteotomy block is provided with osteotomy groove, is installed with column on the base, and the osteotomy block is slidably set in described vertical On post, the screw thread adjusting means for adjusting the base and the osteotomy block relative altitude on the front ankle bone cutting device, are provided with；

The column is provided with scale, and the scale setting direction is parallel to the stem height direction；

Wherein, the screw thread adjusting means include the sliding nut being fixedly installed with the position base and with the sliding nut The leading screw of cooperation, the leading screw are fixed with the osteotomy block relative position and are rotatably connected, and the leading screw axis is parallel to described The setting of column.

2. front ankle bone cutting device according to claim 1, it is characterised in that be provided with the receiving leading screw on the osteotomy block Sleeve, the sleeve bottom is provided with U-shaped groove, and the sliding nut can be moved up and down in sleeve U-type groove.

3. front ankle bone cutting device according to claim 1, it is characterised in that described leading screw one end is installed with the drive leading screw The adjusting nut of rotation.

4. front ankle bone cutting device according to claim 1, it is characterised in that the osteotomy block be provided with by the osteotomy block with The skew nailing hole that femur ankle far end cutting section is fixed, the base are provided with two and rise and determine outward turning and the straight nail of fixation.