Abstract: A modular fusion cage and tool for the insertion of the fusion cage is provided. The fusion cage includes a ramp member having superior and inferior bone contacting surfaces, and anterior and posterior sides. The ramp member is adapted to be positioned between adjacent vertebral bodies. The implant also includes a ring member slidably matable with the ramp member. The ring member includes superior and inferior bone contacting surfaces, and anterior and posterior sides. The implant according to the present invention is particularly useful for facilitating the safe and accurate insertion of the implant between adjacent vertebral bodies.

Abstract: The invention provides a spinal disc implant comprising two side walls which are opposed and substantially parallel spaced apart by a front wall and a back wall to define an interior space. The side walls define substantially elliptical curves joining the front and back walls. The front wall is also curved and the back wall may be either curved or straight. The walls may have openings or holes which may be circular or elliptical in shape. The upper and lower edges of the implant have a plurality of teeth extending therefrom for engaging adjacent vertebrae. The implant is made of a biocompatible metal such as titanium or an alloy thereof, and the first and second sides tapering from the second end to the first end. The interior space has a porous hydroxyapatite block shaped to fill the interior space. The porous hydroxyapatite substance helps the prosthesis integrate into the vertebral structure by allowing into the pores.

Abstract: A modular fusion cage and tool for the insertion of the fusion cage is provided. The fusion cage includes a ramp member having superior and inferior bone contacting surfaces, and anterior and posterior sides. The ramp member is adapted to be positioned between adjacent vertebral bodies. The implant also includes a ring member slidably matable with the ramp member. The ring member includes superior and inferior bone contacting surfaces, and anterior and posterior sides. The implant according to the present invention is particularly useful for facilitating the safe and accurate insertion of the implant between adjacent vertebral bodies.

Abstract: The present invention relates to an interbody spacer for use in replacing diseased or damaged intervertebral discs and fusing together vertebrae. The implant includes an annular base portion having an anterior end, a posterior end, and two side portions together forming a continuous outer wall, and an upper and a lower face portion extending around the outer wall. A plurality of teeth extend outwardly from the upper and lower face portions of the annular base portion. The teeth are slanted in the longitudinal direction toward the anterior end and have a generally regular V-shaped configuration in the transverse direction.

Abstract: The invention provides a spinal disc implant comprising two side walls which are opposed and substantially parallel spaced apart by a front wall and a back wall to define an interior space. The side walls define substantially elliptical curves joining the front and back walls. The front wall is also curved and the back wall may be either curved or straight. The walls may have openings or holes which may be circular or elliptical in shape. The upper and lower edges of the implant have a plurality of teeth extending therefrom for engaging adjacent vertebrae. The implant is made of a biocompatible metal such as titanium or an alloy thereof, and the first and second sides tapering from the second end to the first end. The interior space has a porous hydroxyapatite block shaped to fill the interior space. The porous hydroxyapatite substance helps the prosthesis integrate into the vertebral structure by allowing into the pores.

Abstract: The invention provides a spinal disc implant comprising a ring shaped body including a first pair of opposed substantially parallel sides spaced apart by a second pair of opposed sides to define a central bore. A first one of the second pair of sides defines a substantially arcuate curve joining a first end of the first pair of sides. A second one of the second pair of opposed sides substantially linearly joins a second end of the first pair of sides. The upper and lower surfaces of the ring shaped body have a plurality of teeth extending therefrom for engaging adjacent vertebrae. The implant is made of a biocompatible metal such as titanium or an alloy thereof, and the first and second sides tapering from the second end to the first end. The interior space may have a porous hydroxyapatite block shaped to fill the interior space. The porous hydroxyapatite substance helps the prosthesis integrate into the vertebral structure by allowing one grow into the pores.