Randomized Prospective Study Comparing Tri-Cortical Iliac Crest Autograft to Allograft in the Lateral Column Lengthening Component for Operative Correction of Adult Acquired Flatfoot Deformity

31 patients (33 feet) with acquired pes planus were randomized to undergo operative treatment for stage II posterior tibial tendon insufficiency (PTTI). Lateral column lengthening was performed with a bone graft from the iliac crest obtained either through allograft or autograft procedures. Results showed that at the 12-week follow-up, union was achieved in both groups. Allograft of the iliac crest appeared to be a viable alternative to autograft procedures, leading to decreased risk of morbidity and costs, as seen in autograft surgeries.