extraligamentous

ex·tra·lig·a·men·tous

(eks'tră-lig'ă-men'tŭs),
Outside of, or unconnected with, a ligament.

extraligamentous

(ĕks″tră-lĭg″ă-mĕn′tŭs) [″ + ligare, to bind]
Outside or unrelated to a ligament.