RESUMO
<p><b>OBJECTIVE</b>To investigate the reconstruction of thumb II-III degree defect by big toe wrap-around flap combined with second toe proximal interphalangeal joint.</p><p><b>METHODS</b>Between May 2004 to July 2012, 25 cases with thumbs II-III degree defects were treated. The ipsilateral big toe wrap-around flap combined with second toe proximal interphalangeal joint was designed to reconstruct the thumb defects based on the thumb size on the healthy side. The distal end of hallux was covered by flap at tibial side. The wound at the fibula side was covered by skin graft and flap. The bone defect at the second toe was filled with remnant hallux or iliac bone.</p><p><b>RESULTS</b>All the 25 reconstructed thumbs survived completely. The patients were followed up for 6-26 months without any joint degeneration. According to the finger reconstruction functional criterion publicized by China Medical Association, the finger function was assessed as excellent in 10 case, good in 11 cases, poor in 4 cases. Joint necrosis happened in 2 cases and bone malunion in 2 cases. The 4 cases received dead bone debridement and iliac bone graft. No malfunction occurred in the donor site.</p><p><b>CONCLUSIONS</b>Our surgical method is a currently effective way to reconstruct II-III degree thumb defects. Satisfactory functional and cosmetic results can be achieved both in donor site and recipient site.</p>