Бялик Евгений Иосифович (RU),Холявкин Дмитрий Анатольевич (RU)
申请号：
RU2012111195/14
公开号：
RU00122016U1
申请日:
2012.03.26
申请国别(地区):
RU
年份:
2012
代理人:
摘要：
It relates to medical engineering and can be used in traumatology and orthopedics for total hip arthroplasty. The technical result-increase endoprosthesis life due to the selection applied to the cup and leg two-layer coating, as well as by the distribution of the coating with regard to the shape and the legs of the cup. The endoprosthesis comprises a cup formed in the form of a hemisphere with means for fixing the cup to the acetabulum, tapered stem, a spherical head and a neck, a head with a fastening leg, wherein the leg is provided with a primary fixing means and provided with an extended proximal portion is 1/3 of the height of the legs, and a tapered distal portion, and the cup and the stem are made of titanium alloy coated porous titanium. To achieve technical result a coating applied to the surface of the stem and the cup is configured double-layered and further comprising hydroxyapatite, which is applied to the porous titanium, the thickness of the layer of hydroxyapatite is 55 ÷ 85 microns, the layer thickness of the porous titanium - 150 ÷ 200 microns, wherein the means fixing the cup to the acetabulum is formed, at least seven evenly fixed on the rim of the cup, the radial ribs and three locking holes, and height of the ribs amounts to 0.4 of the height of the cup, the radial length of the ribs - 1.75 m And a thickness - 0.5mm, the porosity of the porous titanium supported on a cup under a layer of hydroxyapatite, is formed with a gradient pore distribution increasing from the surface being treated cups to the surface contacting the acetabulum, wherein the additional fixing means is formed by transverse legs and longitudinal grooves, formed on the surfaces respectively of the proximal and distal sections of the legs and feet formed two-layer coating with a pore size of porous titanium, increasing from the proxy mal to the distal portion, wherein the ratio of the depth of the transverse and longitudinal grooves additional fixing means for the legs thick
