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. 2012 Aug 23;36(11):2355–2360. doi: 10.1007/s00264-012-1646-y

Fig. 1.

Fig. 1

a The posterior femoral condylar axis (PFCA) was used as the reference line to determine the angle of lower extremity rotation relative to horizontal plane. b The major fracture angle (MFA) was determined by measuring the angle between PFCA and main fracture line. c The surface area (SA) was determined by calculating the percent of Areaa/(Areaa+Areab). d The MFH was determined by measuring the joint line to the most distal extent of the medial fragment