||+15° and over
||+10° to +14°
||=5° to +9°
||0° to +4°
||-1° to -5°
||-6° to -10°
||-11° and over
||Femoral head well centred in acetabulum
||Femoral head centre lies medial to DAE.
Lateral or medial joint space diverges slightly
|Femoral head centre superimposed on DAE. Medial joint space increase obvious
||Femoral head centre just lateral ti DAE. 1/2 femoral head within acetabulum
||Femoral head centre clearly lateral to DAE.
||Femoral head centre well lateral to DAE. Femoral head just touches DAE
||Complete pathological dislocation
|Cran. Acetabulum Edge
|even curve, parallel to femoral head troughout
||Lateral or medial 1/4 CrAE flat.
Lateral or medial joint space diverges sligjtly
|CrEA flat throughout most of its length
||CrAE shows slight bilabiation
||1/4 femoral head within acetabulum
||CrAE shows gross bilabiation
||Entire CrAE slopes cranially
|Dorsal Acetabulum Edge
|DAE has slight surve
||Loss of S-curve only in the presence of other dysplastic change
||Very small exostosis on cran. DAE
||Obvious exostosis on DAE; especially cran. and/or minor "loss if edge"
||CrAE shows moderate bilabiation
||Marked exostosis all along DAE and/or gross "loss of edge"
||Masive exostosis from cranial to caudal DAE
|Cran. Effective Acetabulum Rim
|Sharp, clear-cut junction of DAE & CrAE
||Indistinct junction of DAE & CrAE
||Very small exostosis or very small facet
||Facet and/or small exostosis and/or slight bilabiation
||Exostosis well lateral to DAE and/or moderate "loss of edge"
||Gross exostosis and/or facet and/or gross bilabiation
||Complete remodelling of CrEAR. Massive exostosis and/or gross facet
|A fine bone line curves medial and caudal from causal end of CrEA
||Slight increase in bone density medial to AF. "Fine line" hazy or lost
||Fine line lost ind AF and vetral AF hazy due to new bone. Notch at CaAE clear
||Incomplete remodelling of acetabulum with medial face lateral to AF. Ventral AE lost. AF hazy. Notch irregular
||Obvious facet and/or obvious exostosis and/or moderate bilabiation
||Gross remodelling. Dense new bone troughout acetabulum. CaAE notch lost and AF obscurred
||Complete remodelling and new articular surface, well lateral ti AF. Notch lost
|Caudal Acetabular Edge
||Small exostosis at lateral CaAE
||Small exostosis at lateral an medial CaAE
||Large exostosis an narrow notch at CaAE
||Marked exostosis and "hooking" of lateral end of CaAE
||Gross distorsion due to mass of new bone in acetabulum. Notch completely lost
|Femoral Head/Neck Exostosis
||Smooth rounded profile
||Slight exostosis in "ring form" and/or dense vertical bony line adjacent to trochanteric Fossa ("Morgan Line")
||Slight exostosis visible on skyline and/or density on medial femoral head.
||Distinct exostosis in "ring formation"
||Obvious complete collar of exostosis
||Massive exostosis giving mushroom appearance
||Massive exostosis and infill of trochanteric fossa and below femoral head
|Femoral Head Recontouring
||Femoral head does not fit in circel due to exostosis or bone loss.
||Some bone loss and/or femoral head/neck ring of exostosis
||Obvious loss and distinct exostosis giving slight conical appearance
||Gross remodelling. Obvious bone loss and exostosis gives mushroom appearance
||Very gross remodelling with marked bone loss and much new one
||Femoral head improperly shaped due to maldevelopment or femoral head centre