‣What are the types of ankle impingement?Anterior - pain with dorsiflexionPosterior - Os trigonum syndrome, FHL synovitis‣What classification for Ankle Anterior Impingement?Grade 1 = synovial impingement with < 3mm tibia spurGrade 2 = Tibia spur > 3mmGrade 3 = significant tibial exostosis with or without fragmentationGrade 4 = Tibiotalar arthritic destruction (cannot do arthroscopic debridement)
