Evidence Based Approach to Perthes.

Perthes is a self-limiting disorder of paediatric hip. The outcome of this disorder is variable. Every aspect of it including, etiology, pathogenesis, pathology, classification, natural course, management and outcome is controversial. There is still no clear guideline for the management of Perthes disease. The aim of treatment is to prevent the head deformity and subsequent secondary osteoarthritis of hip. To maximize the results of containment procedures, measures to unstiffen the hip should be taken. Evidences are there that only a section of involved hips need intervention. Most untreated hips do not require intervention until the age of forty.