Kyocera Medical Corporation

Takatoshi Miyashita

Nicholas Slater

Joshua Butters

Jeffery D Arnett

Shion Fujimura

Noboru Kazumi

Atsushi Kuroshima

Takao Ida

An artificial hip joint stem of the present invention includes a stem body divided into a stem proximal part, a stem distal part, and a stem intermediate part located between the stem proximal part and the stem distal part. The stem body includes a rough surface located at the stem proximal part and having a surface roughness (Ra) of 10-80 &#x3bc;m, a smooth satin surface located at the stem intermediate part and having a surface roughness (Ra) of 0.1-1.0 &#x3bc;m, and a shiny surface located at the stem distal part and having a surface roughness (Ra) of less than 0.1 &#x3bc;m. The present invention also provides an artificial hip joint including the artificial hip joint stem.

Artificial hip joint stem and artificial hip joint including the same

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.

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

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Hirakata, Japan

Takatoshi Miyashita