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US 9,308,093 B1Granted
Hip implant with an interface that connects a metal neck body to a porous bone fixation body
OwnerPhilip Scott Lyreninventor
Life of this patent
Estimating the term…
Abstract
A hip implant having two distinct bodies, a neck body and a bone fixation body. The neck body is formed from a solid metal and has an interface for connecting to a femoral ball. The bone fixation body has an elongated shape and is formed as a porous structure that is inserted into an intramedullary canal of a patient.
Claims15
A method, comprising:
- machining a neck body from solid metal to have a base portion, a neck portion that extends outwardly from the base portion and includes a cylindrical configuration with a taper that receives a femoral ball, and a male protrusion that extends outwardly from the base portion oppositely from the neck portion and has an elongated shape that tapers and has a polygonal shape in a cross-sectional view;
- fabricating, separately from the neck body, a bone fixation body that is formed of a porous metal structure without a solid metal substrate but with the porous metal structure that extends throughout the bone fixation body, has a size and a shape that emulate a size and a shape of a porous structure of natural human bone, has a trapezoidal shape in a cross-sectional view, and has a tapering body with an external bow;
- and
- permanently connecting, after the bone fixation body is separately fabricated from the neck body, the bone fixation body to the neck body at an interface where the male protrusion extends into and engages the bone fixation body and forms a core for the bone fixation body, the bone fixation body abuts the base portion of the neck body, and the bone fixation body abuts the polygonal shape of the male protrusion in order to provide anti-rotation at the interface between the neck body and the bone fixation body.
1 more element
A method, comprising:
- machining, from solid metal, a neck body that includes a base portion, a neck portion that extends outwardly from the base portion and has a cylindrical configuration with a taper that receives a femoral ball, and a male protrusion that extends outwardly from the base portion oppositely from the neck portion and has an elongated shape that tapers and has a non-circle shape in a cross-sectional view;
- making, separately from the neck body, a bone fixation body that is formed of a completely porous metal structure without a solid metal substrate, has a size and a shape that emulate a size and a shape of a porous structure of natural human bone, has a trapezoidal shape in a cross-sectional view, and has a tapering body with an external bow;
- and
- permanently attaching, after the bone fixation body is separately made from the neck body, the bone fixation body to the neck body at an interface that occurs where the male protrusion extends into and engages the bone fixation body to form a core for the bone fixation body, where the bone fixation body engages the base portion of the neck body, and where the bone fixation body engages the non-circle shape of the male protrusion and provides anti-rotation at the interface where the neck body and the bone fixation body attach.
1 more element
A method, comprising:
- machining a neck body from solid metal to have a base portion, a neck portion that extends outwardly from the base portion and includes a cylindrical configuration with a taper that receives a femoral ball, and a male protrusion that extends outwardly from the base portion oppositely from the neck portion and has an elongated shape that tapers and has a polygonal shape in a cross-sectional view;
- fabricating, separately from the neck body, a bone fixation body that has a tapering cylindrical body with an external bow on one side and with a trapezoidal shape in a cross-sectional view and that is formed of a porous metal structure without a solid metal substrate such that the porous metal structure extends throughout the bone fixation body, has a porosity with values that include 45% to 65%, and has a size and a shape that emulate a size and a shape of a porous structure of natural human bone;
- and
- permanently connecting, after the bone fixation body is separately fabricated from the neck body to have the tapering cylindrical body with the external bow on one side and with the trapezoidal shape, the bone fixation body to the neck body to form a hip implant such that the male protrusion forms a core for the bone fixation body, the bone fixation body abuts the base portion of the neck body, and the bone fixation body abuts the polygonal shape of the male protrusion in order to provide anti-rotation between the neck body and the bone fixation body.
1 more element
Dependencies are inferred from the claim text.