“…36 Freeze-dried allografts are the most commonly used grafting material for interbody fusion of the cervical, thoracic, and lumbar spines. 37,38 Among these grafts, corticocancellous blocks are the most frequently used, [39][40][41] because they combine the properties of the cancellous bone that allows vascular infiltration and the cortical bone that provides rigid fixation and resistance to resorption. 23,24,40,42 Clinical studies have suggested that predictable results could be obtained with implants placed in bone augmented with allograft onlays, achieving a success rate as high as 90% after at least 1-year followup.…”