Low-elastic-modulus integrated titanium-based femoral handle and preparation method thereof

Abstract

The invention discloses a low-elastic-modulus integrated titanium-based femoral handle and a preparation method thereof. According to the preparation method, a femoral handle model is designed by adopting CAD software; the model is divided into two parts; the first part adopts a porous scaffold structure, and the second part is a femoral handle body, wherein the porous scaffold structure coats the neck of the femoral handle body; the porous scaffold structure adopts cancellous bone-like porous scaffold design; pores are distributed uniformly; the pores are the same in size from the inside to the outside; the aperture range is 100 [mu]m to 1 mm; the depth range of a porous structure part is 40 to 60 percent of the depth of the cross section of a femur from the outside to the inside; the designed femoral handle model is converted into a CLI file with cross section processing information; according to the CLI file, the integrated titanium-based femoral handle is processed and manufactured layer by layer by adopting a selective laser fusing technology. According to the low-elastic-modulus integrated titanium-based femoral handle and the preparation method thereof, the problems of stress concentration and stress shielding of a combination interface of an implant and a bone tissue can be effectively reduced; moreover, the preparation method for the low-elastic-modulus integrated titanium-based femoral handle has good application in the field of biomedicine.

Description

technical field [0001] The invention relates to the research field of artificial joints in medical devices, in particular to a low elastic modulus integrated titanium-based femoral stem and a preparation method thereof. Background technique [0002] Titanium-based materials have good biocompatibility, non-toxicity, corrosion resistance, high mechanical strength and toughness, and have been widely used in the repair and replacement of bones in bearing parts of the human body. Ti-6Al-4V is currently the most widely used titanium alloy in clinical practice. Its elastic modulus is 108Gpa, although it is only 53% of the stainless steel used for bone repair materials, but compared to hard tissues such as human bones (10-30Gpa) Still higher. The mismatch of elastic modulus between the bone implant material and the host bone will easily cause stress concentration and stress shielding, so that the joint between the implant and the host bone lacks the necessary stress stimulation, wh...

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