| 摘要 |
The invention relates to an orthopedical screw rod for being fixed into fractured bones, meant to be used for human or animal surgery intervention. According to the invention, the rod has a length ranging between 150...220 mm and it consists of a cone-shaped point (), which has, in the median area, a threaded segment which is continued with a threaded section (), both being adapted in order to be implanted into the bone cortical area, the threading being performed by means of the cone-shaped end () and a handle () between which there is a recess () needed for facilitating the shortening of the orthopedical screw rod, the handle () being provided with some grooves () which give the rod a self-threading character, the diameters of the threaded section () and the handle () being in the ratios ranging between 2/3...5/6, the length of the threaded section () being approximately 30...40% of the total length of the orthopedical rod, and the point () having cut some longitudinal channels () with the role of protecting the bone marrow white while inserting the rod, the length ranging between 10...20% of the length of the threaded section (). |
