Faced with the problem of the loose and extrusion, and then the malfunction of the osseointegrated implant for percutaneous osseointegrated artificial lower limb attachment after long-time of use caused by stress shielding, which occurred always around traditional one part implant,a new type of implant—multi part implant was developed. Based on CT data and under the maximal load during a normal walking cycle, 3D finite element analysis was carried out to analyze the stress of bone around the new implant in three cases of distally truncated femur at high-position、middle-position and low-position. Results showed that stress shielding and stress concentration under the new type of implant are reduced effectively compared with the traditional one-part implant, and the stress distribution is much close to the natural bone. Application for distally truncated femur at middle-position and low-position was much better, while stress concentration was marked at high-position. Meanwhile, the stability in vivo can also be maintained with the multi part implant.The new implant can markedly reduce the adverse effect of stress shielding, which is promising applied for prosthetic limb.
