They appear to be referred to more commonly as "borders", at least that's what the Stedman's calls them.

The shaft of the tibia or body of the tibia, is the diaphysis of the tibia and has three borders and three surfaces.

Borders

The anterior crest or border, the most prominent of the three, commences above at the tuberosity, and ends below at the anterior margin of the medial malleolus.

The medial border is smooth and rounded above and below....

The interosseous crest or lateral border is thin and prominent....
https://en.wikipedia.org/wiki/Shaft_of_tibia


The Latin name, in singular, is "margo", but I can't say for sure what the plural is, it's mentioned here in this reference from the Stedman Medical Dictionary as "margines", but that seems to relate to the "marginis" form only.

margo, gen. marginis, pl. margines

SYN: margin, border.


medial border of tibia [TA]

the rounded border of the tibia that separates the posterior and medial surfaces. SYN: margo medialis tibiae [TA].