Patent ID: 8137350

Claim:
An internal fixator of bone fractures used for fixing a bone fragment on one side of a femoral head with a corresponding bone part on the other side in femoral trochanteric fracture, comprising: an elongated sliding nail to be inserted into a fractured area from outside of a femoral shaft; a femoral head nail adapted to be joined with the sliding nail wherein a joining structure is selected from the group consisting of the femoral head nail extending through a through-hole at a tip end portion of the sliding nail and an end portion of the sliding nail extending into a through-hole in a body portion of the femoral head nail such that the femoral head nail and the sliding nail cross each other and wherein the femoral head nail is positioned to be inserted into an inner lower part of the femoral head, the femoral head nail includes a screw portion and a stick-like body portion, the screw portion having a male screw, the body portion receiving one end of the screw portion and rotatably connected relative to the screw portion, wherein the screw portion and the body portion are respectively provided with projections, the projections being brought into contact with each other at a predetermined rotation angle when the screw portion and the body portion are relatively rotated, and wherein the body portion has a through hole for receiving a tip part of the sliding nail to join the sliding nail and the femoral head nail with each other; and a sleeve plate having a securing part and a sleeve part, the securing part to be secured to the femoral shaft on the outside of the femoral shaft, and the sleeve part to be projecting from the securing part and slidably receiving the sliding nail in an elongated direction of the sliding nail, wherein with the securing part being secured to the femoral shaft, the sleeve part is configured to project in a direction at a high angle of 136° or more in relation to a femoral axis, assuming that a caudal direction of the femoral axis is defined as 0° and wherein the femoral head nail, when joined with the sliding nail, is configured to be inserted at a lower angle than the high angle in relation to the femoral axis to reach within the femoral head, so as to firmly hold the bone fragment on the side of the femoral head.