A vast, single grafting area and single fusion mass The role of the large implant-graft volume is to enable vascularization from one vertebra to the other over the largest possible grafting area. The ROI concept with its opening and peripheral load bearing surfaces favors grafting by allowing the creation of a large single fusion mass.
Restoration of lordosis Restoration of desired lordosis is possible when placing an implant with a lordosing design. The ROI implant satisfies this  requirement through a difference in its antero-posterior height. The ROI PVBR with its open design and lordosis options facilitates the intraoperative re-creation of normal anatomy.

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