[Study on design and metallic materials of the femoral stems of total hip prostheses (author's transl)].
The relationship between the strength of the total hip prosthesis femoral stem and its design and material was studied for various types of prosthesis made of various materials. First, with Müller prostheses made of COP, Prostasul-10 and AISI 316L, the relation between the strength and the material was studied. The one made of COP was strongest, then Protasul-10 and AISI 316L followed. The one made of Protasul-10 showed a specific stress-strain curve. This disadvantage of Protasul-10 could be attributed to the working process. Next, the relationship between the strength and the design of a stem was studied with various types of Charnley, Müller, and SOM prostheses made of the same material (COP and AISI 316L). The study showed the Charnley type with standard stem was strongest, and that the Müller type was weakest. The Charnley type has largest transection and showed the least strain. From the above results, the Charnley type with standard stem made of COP appears to be the best.
D006244:Hardness; D006622:Hip Prosthesis; D008670:Metals; D011474:Prosthesis Design; D013314:Stress, Mechanical
D008670:Metals