Measurement of version of chondrolabral and osseous portions of the glenoid. a, reference line representing plane of chondrolabral portion of glenoid; b, reference line representing plane of scapular body; c, reference line representing plane of osseous portion of glenoid. Angle between a and b′ (perpendicular to b) represents version of chondrolabral portion of glenoid. Angle between c and b′ represents version of osseous portion of glenoid (Kim et al.).