Inclusion Criteria:  Being routinely scheduled for a reconstructive surgical procedure for the following indications or involving the following type of procedure  Any reconstructive procedure for Pes Planus, Pes Plano-valgus, or Posterior Tibial Tendon Dysfunction Tibio-talar arthrodesis or prosthesis Sub-talar -and/or (partial) Chopart - and/or Triple arthrodesis  Pantalar arthrodesis with or without inclusion of the Chopart joint  Exclusion Criteria:  Age under 18