Abstract: The present disclosure provides a treatment tool cable of satisfactorily treating long tubular bone fractures, such as femoral trochanteric fractures and subtrochanteric fractures. The treatment tool comprises an elastic plate 2 that has a curved shape or that can be curved, the plate comprising at least one pressing portion 20 that is provided at one end in the width direction of the plate and that presses the trochanter 103 of the femur 100 from the posterior side by a restoring force that is generated by deformation of widening the curvature.

Abstract: A holding device includes a cylindrical main body portion having an outer cross-section equal to or less than a cross-section defining the inner wall of an upper portion and a pair of locking pieces protruding outward from the distal end portion of the main body portion in the direction of the central axis along a direction perpendicular to the central axis at the positions of a pair of slots while the main body portion is positioned within the inner wall of the upper portion when viewed from the direction of the central axis. The pair of locking pieces have such a shape as to be contained within the outer shape of the head portion while being positioned within the pair of slots.

Abstract: A surgical instrument including a pre-cut trial mounted on a pre-cut line which is cut shallower than a genuine-cut line. The pre-cut trial is modeled after the genuine implant which is mounted on resected surfaces formed by performing genuine-cutting and comprised of an end resected surface, posterior and anterior resected surfaces, and posterior and anterior chamfer-resected surfaces on the distal end of a femur, and the pre-cut trial is mounted on the pre-cut line, thus observing the extended and flexed positions of the femur and the state of flexion thereof so as to make judgment if the genuine implant is appropriate.

Abstract: A bone resection jig that can make ligament tension equal at extension and flexion positions without any actual measurements when resecting femur and tibia during artificial knee joint replacement surgery.

Abstract: A surgical instrument including a pre-cut trial mounted on a pre-cut line which is cut shallower than a genuine-cut line. The pre-cut trial is modeled after the genuine implant which is mounted on resected surfaces formed by performing genuine-cutting and comprised of an end resected surface, posterior and anterior resected surfaces, and posterior and anterior chamfer-resected surfaces on the distal end of a femur, and the pre-cut trial is mounted on the pre-cut line, thus observing the extended and flexed positions of the femur and the state of flexion thereof so as to make judgment if the genuine implant is appropriate.

Abstract: A bone resection jig that can make ligament tension equal at extension and flexion positions without any actual measurements when resecting femur and tibia during artificial knee joint replacement surgery.

Abstract: By forming a bone-compatible implant wherein a groove or hole has been formed in the surface of a base material made of titanium metal or a titanium alloy at its joint with a bone tissue and the groove or hole has on the inner surface thereof an oxide film formed by heating in an oxygen-containing atmosphere, apatite is allowed to deposit on the inner surface of the groove or hole easily. Thus, an implant is provided which can be attached to a bone within a relatively short period of time even without resorting to bone cement.

Abstract: A shock absorbing structure having a high shock absorption characteristic is provided. The shock absorbing structure includes a solidified portion and a sintered portion. The solidified portion is formed by dissolving and solidifying a plurality of inorganic powder particles. The sintered portion is formed by sintering a plurality of the inorganic powder particles. The sintered portion is connected to the solidified portion. The shock absorbing structure is a composite structure including the solidified portion and the sintered portion and therefore has a high shock absorption characteristic.

Abstract: A surgical assistance system for operating on biological tissue using a surgical tool attached to an arm of an automatically-controlled surgical instrument so that an optimal feed rate of the tool is calculated and outputted to the surgical instrument, the system including: a device for storing and voxelizing medical image data obtained from a biological tissue subject to surgery; a device for setting an operative location based on the shape of the biological tissue; a device for calculating a tool path along which the tool travels to perform surgery at an operative location; a device for determining the region of interference between the tool and the voxels; a device for determining the hardness of the biological tissue in the interference region; a device for calculating an optimal tool feed rate corresponding to the hardness; and a device for outputting the feed rate obtained by the calculations to the surgical instrument.