supplemental groove

sup·ple·men·tal groove

a curvilinear depression normally found on each side of a triangular ridge (crista triangularis).

sup·ple·men·tal groove

(sŭp'lĕ-men'tăl grūv)
An indistinct linear depression, irregular in extent and direction, which does not demarcate major divisional portions of a tooth.

sup·ple·men·tal groove

(sŭp'plĕ-men'tăl grūv)
Curvilinear depression on each side of a triangular ridge (crista triangularis).
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