Acetabular cup removing apparatus for artificial hip joint

Abstract

The present invention relates to an acetabular cup removing apparatus for an artificial hip joint. An acetabular cup removing apparatus for an artificial hip joint according to one embodiment of the present invention comprises: a main driving unit; a main shaft which is rotatable by a driving force of the main driving unit; a cutter unit which is disposed at a front end of the main shaft, tilt-able along an acetabular portion into which an acetabular cup has been implanted, and cuts the acetabular portion while being rotated by the main shaft; and a stepless adjustment unit for continuously adjusting a tilting angle of the cutter unit while continuously moving in a forward and backward direction relative to the main shaft.

Description

technical field [0001] The invention relates to an acetabular cup removal device for an artificial hip joint. Background technique [0002] Generally speaking, an artificial hip joint is a replacement that can be replaced when the hip joint malfunctions, and it is implanted in the place where the hip joint was, so that normal activities can be maintained. [0003] Such artificial hip joints are divided into hemispherical acetabular cup, which is inserted into the acetabular part of the pelvis and has a pad that acts as a bearing; femoral stem, which is attached to the femur; and hemispherical femoral head. (femoralhead), located at the end of the femoral stem and inserted into the acetabular cup, to replace the femoral head of the femur. [0004] Therefore, patients who cannot function due to arthritis or dysplasia, sequelae of trauma or infection and feel pain in the hip joint can restore the movement function of the joint and eliminate pain. . [0005] On the one hand,...

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Problems solved by technology

[0008] However, since this existing acetabular cup removal device for an artificial hip joint has a limitation of rotating the cutting tool to adjust the angle in 3 stages, and a time difference occurs in each stage, the surface of the cut acetabulum is not uniform

In addition, there is a problem that if the part of the acetabulum that requires more cutting is in the interval of changing stages, the rotary cutting tool cannot be positioned on this part

[0009] In addition, such a conventional acetabular cup removal device for an artificial hip joint has a structure in which it cannot return to its original position until all 3-stage angle adjustments are completed by rotating the cutting tool.

Therefore, in order to set the angle of the rotating cutting tool to the previous angle, it is necessary to readjust after completing all three angle adjustments and returning to the original position, which is inconvenient to use and requires more operation time The problem

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