Abstract: Disclosed is a biomedical ? titanium alloy and a preparation method thereof. Its composition includes: Mo: 9.20-13.50%; Fe: 1.00-3.20%; Zr: 3.50-8.20%; Ta: 0-1.00%; the balance is Ti. The ? titanium alloy is suitable for the laser additive manufacturing technology, and the prepared parts have a dense equiaxed grain structure with ultra-low grain size and a small number of columnar grain structures, which produces a fine-grain strengthening effect, and greatly improve the hardness and tribocorrosion performance of the alloy material. Also provided is a method for preparing a non-toxic, low-elasticity, and tribocorrosion resistant biomedical ? titanium alloy material. A powder prepared from the above alloy components is subjected to a laser additive manufacturing technology to prepare a corresponding ? titanium alloy with high-hardness, good tribocorrosion resistance and extremely low cytotoxicity.

Abstract: A foot orthotic for use as an insole in footwear is made solely from a copper-containing material.

Abstract: High-heeled footwear has a heel with a resilient compressible element allowing the heel of the foot to be lowered at heel strike to approximate a normal walking pattern in low-heeled shoes. Preferably, the footwear also includes a midfoot support structure, which may be a sprung footbed, or a sling and reinforcement girder, and which serves to redistribute load from the wearer's forefoot to her midfoot.