Pes planus is a complex syndrome whose origin can be quite different. Knowledge of the causes is essential for optimal treatment. Clinical and radiographic examinations are the basis for a correct diagnosis. Arthroreisis of the sub-astragalic joint, extrasenotarsum, represents the gold standard for surgical correction of idiopathic pes planus in childhood. The rate of excellent and good results has been 98% in the authors’ experience. We conclude that the arthroreisis of the sub-astragalic joint is an easy, fast and efficacious operation in the management of idiopathic pes planus.

In acquired knee deformations the usefulness of arthroscopy is strictly correlated with the degree of axial defomation and cartilaginous degeneration. The authors comparatively consider two groups of patients (the first one Albach I and II and the second one Albach III and IV) treated with arthroscopic débridement (washing and curettage), in relation to the joint’s degeneration stage. A minimum 6-month follow-up, using KSKSS grading revealed satisfactory medium-term results.