Interobserver Reliability and Intraobserver Reproducibility of the Modified Ficat Classification System of Osteonecrosis of the Femoral Head*

Abstract
Anteroposterior and lateral plain radiographs of 116 osteonecrotic femoral heads were reviewed to assess the interobserver reliability and intraobserver reproducibility of the modified Ficat classification system. The radiographs were reviewed initially and then again six months later by th