Interbody fusion cages
AssigneeMoharn Medical Devices, LLC
InventorCurt Freudenberger
Life of this patent
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Abstract
An implant for interbody fusion of vertebrae comprising a unibody cage structure having an enveloping cage volume and a minimized material volume. The cage structure comprises a first and a second generally planar ring member, each ring member formed from an opposing pair of lengthwise joists and an opposing pair of cross joists, the joists together forming a large opening through the ring member. The ring members are fixedly sandwiched on a plurality of support members, the support members holding the ring members in a spaced apart relationship to thereby provide a large void volume relative to the enveloping cage volume, to thereby allow for receipt of a large volume of bone graft within the cage structure.
Claims29
An implant device for interbody fusion of lumbar or cervical vertebrae comprising:
- a unibody cage structure, the cage structure comprising titanium, the cage structure having an enveloping cage volume and a minimized material volume, the cage structure comprising
- a first and a second generally planar ring member, each ring member formed from an opposing pair of lengthwise joists and an opposing pair of cross joists, the joists together forming a large opening through the ring member,
- the ring members fixedly sandwiched on a plurality of support members, the support members holding the ring members in a spaced apart relationship to thereby provide a large void volume relative to the enveloping cage volume, to thereby allow for receipt of a large volume of bone graft within the cage structure,
- wherein a ratio of the void volume to the enveloping cage volume is between about 0.7 to about 0.9.
Dependencies are inferred from the claim text.