Posterior tibial slope exists when the top of the tibia slopes downward towards the back of the knee. A few degrees of posterior slope is normal.

anterior tibial cortex line
perpendicular to anterior tibial cortex line
posterior tibial slope


Measurement of posterior tibial slope

To measure the angle of tibial slope, a line is drawn on an X-ray along the front of the tibia (anterior tibial cortex line) (A). Then a line is drawn perpendicular to the anterior tibial cortex line (B). Finally a line is drawn along the top of the tibial plateau (C), and the angle of the posterior tibial slope is the angle formed by B and C.


Editor's interpretation of a paper published in the medical literature.

An explanation of different kinds of osteotomy around the knee



Post HTO/ACL Revision


Underappreciated Factors to Consider in Revision Anterior Cruciate Ligament Reconstruction: A Current Concepts Review. Lee PYF, Nixion A, Chandratreya A and Murray JM. Surg J (N Y). 2017 Jan; 3(1): e9–e16.

High tibial osteotomy in knee laxities: Concepts review and results. Robin JG and Neyret P. EFORT Open Rev. 2017;1(1):3–11

Posterior tibial slope in the normal and varus knee. Matsuda S, Miura H, Nagamine R, Urabe K, Ikenoue T, Okazaki K and Iwamoto Y. Am J Knee Surg. 1999 Summer;12(3):165-8.

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