Artificial hip joint stem, stem inserter, artificial hip joint system including them, and artificial hip joint

摘要

In an artificial hip joint stem of the present invention, a distance between an inner wall portion and an outer wall portion is decreased as separating from an opening part in a sectional view that is parallel to a stem central axis and includes the inner wall portion and the outer wall portion, and both a front wall portion and a rear wall portion have a planar region in a sectional view that is parallel to the stem central axis and includes the front wall portion and the rear wall portion. A stem inserter of the present invention includes a disk-shaped front end part. The present invention also provides an artificial hip joint system including the artificial hip joint stem and the stem inserter, and an artificial hip joint including the artificial hip joint stem.

主权项

1. An artificial hip joint stem, comprising:
a concave part located in a shoulder part of a stem body, the concave part comprising:
an opening part that opens into the shoulder part, anda wall part extending along a stem central axis of the stem body,the wall part comprising:
an inner wall portion and an outer wall portion opposed to each other, anda front wall portion and a rear wall portion opposed to each other, wherein a distance between the inner wall portion and the outer wall portion decreases going toward a distal end of the concave part from the opening part in a sectional view that is parallel to the stem central axis and includes the inner wall portion and the outer wall portion, and the distance between the inner wall portion and the outer wall portion begins to decrease at a location closer to the opening part of the concave part than the distal end of the concave part, and both the front wall portion and the rear wall portion have a planar region in a sectional view that is parallel to the stem central axis and includes the front wall portion and the rear wall portion, and the front wall portion comprises a front groove extending along the stem central axis and the rear wall portion comprises a rear groove extending along the stem central axis.