Threaded interbody device
OwnerRoger P. Jacksoninventor
Life of this patent
Estimating the term…
Abstract
An interbody device having upper and lower surfaces that are sized and shaped to be operably positioned between a pair of adjacent vertebrae for support and/or fusion. The upper and lower surfaces have a generally convex curvature. The upper and lower surfaces are joined by a pair of side surfaces that are arcuate and semi-circular, when viewed from the front, so as to be generally concave. The interbody devices are used in pairs between two vertebrae and joined by a bar that is received in a recess in each of the devices so as to resist rotation of the devices relative to the bar subsequent to installation.
Claims14
An interbody device for placement between a pair of adjacent vertebrae;
- said device comprising:
- a) a body having an axis and upper and lower elongate convex surface that are generally coaxially thread depth is reduced;
- and located with respect to said axis and which are cylindrical in shape along a substantial length of said device;
- said upper and lower surfaces having elongate side edges;
- b) said body also having inwardly arced concave said surfaces along a substantial length thereof;
- said side surface extending between respective side edges of said upper and lower surfaces.
An interbody device for placement between a pair of adjacent vertebrae;
- said device comprising:
- (a) a body having an axis and upper and lower elongate surfaces that are generally coaxially located with respect to said axis;
- said upper and lower surfaces having elongate side edges;
- said upper and lower surfaces each having a thread located thereon;
- (b) said thread has a generally uniform thread depth except near a front of said device whereat said thread depth is reduced;
- and
- (c) said body also having inwardly arced side surfaces;
- said side surfaces extending between respective side edges of said upper and lower surfaces.
In a threaded interbody device for placement between a pair of adjacent vertebrae having an axis of rotation with upper and lower outer surfaces with threads thereon adapted to operably engage respective vertebrae and a pair of concave cylindrically shaped side surfaces joining respective outer edges of said lower and upper surfaces;
- the improvement comprising wherein:
- (a) each of said upper and lower surfaces are sectors of a cylinder substantially along the entire length of said device and have a convex circular cross-section in a plane perpendicular to said axis.
Dependencies are inferred from the claim text.