This issue will include papers on the following: Biomechanics of the normal and pathological ankle joint, Ankle arthrodesis versus ankle replacement, The concept of ankle joint preserving surgery, What are the issues in treatment of patients with rheumatoid arthritis when planning and performing ankle replacement?, Mobile and fixed bearing prostheses, Techniques and pitfalls with the Salto prosthesis, The Hintegra prosthesis: Techniques and pitfalls, The Mobility Total Ankle Replacement: Techniques and pitfalls, Treatment of the arthritic valgus ankle, Treatment of the arthritic varus ankle, Revision total ankle replacement, Salvage arthrodesis after failed total ankle replacement, Managing specific complications related to total ankle replacement, The New Zealand total ankle registry.