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. 2020 Jan 1;97(17):1441–1448. doi: 10.2106/JBJS.N.01313

Fig. 1.

Fig. 1

Figs. 1-A and 1-B Measurement of the tibial tuberosity-trochlear groove (TT-TG) distance. Fig. 1-A The TT-TG distance is the mediolateral distance between the midpoint of the insertion of the patellar tendon and the trochlear groove perpendicular to the femoral posterior condylar line (fPCL). TGL = trochlear groove line. Fig. 1-B The solid line indicates the femoral posterior condylar line (fPCL), the line with shorter dashes indicates the trochlear groove line (TGL), and the line with longer dashes indicates the tibial tubercular line (TTL).