Patent ID: 7553333
Filing Date: 2009-06-30
Classification: A61B,A61F

Abstract:
1. A hip prosthesis set comprising: a hip prosthesis having a shaft which is configured to be inserted into a femoral cavity without using cement, a proximal portion of the shaft comprising a base body, a first rib projecting dorsally from the base body relative to an implanted position and a second rib projecting ventrally from the base body relative to the implanted position, each of the ribs having two flanks and a rear face and extending parallel to the shaft direction, increasing in height from a distal portion of the shaft to the proximal portion for displacing and compressing spongy bone tissue as the prosthesis is inserted into the femoral cavity and having a rough surface to encourage bone ingrowth, and a tool which is configured to shape the cavity so that it substantially corresponds to the shape of the base body, wherein each of the ribs is on average at least three times as wide as it is high and the rough surface has a roughness on its rear face that is sharp-edged with a peak-to-valley height range of between 0.05 and 0.5 mm.