Fig. 3From: Direct femoral head approach without surgical dislocation for femoral head chondroblastoma: a report of two casesImages obtained during surgery in Case 1. a Exposed articular surface of the femoral head without dislocation. b The trapdoor segment was lifted, and thorough excision curettage was performed. c Autologous cancellous bone and bone substitute was grafted. d The door was closedBack to article page