FISSURE- a groove, natural division, deep furrow, elongated cleft
EMBRASSURE- are a V-shaped flare surrounding the proximal contact areas of a tooth. The contact
areas are relative to the that widen out from the point where two teeth in the same arch come into
GROOVE-a linear channel or sulcus
DEVELOPMENTAL GROOVE-One of the fine lines found in the enamel of a tooth that mark the junction
of the lobes of the crown in its development. Also calleddevelopmental line.
central fossa -is a centrally located depression or concavity found on the occlusal surface of
molars and mandibular second bicuspids. The other bicuspids have mesial and distal triangular
fossae, but do not have a central fossa.
sulcus -is an elongated valley or depression in the surface of a tooth formed by the inclines of
adjacent cusps or ridges. As an example, a central sulcus is a major linear depression that
traverses the occlusal surface of a posterior
A linear fault that sometimes occurs in a developmental groove. A fissure represents a lack of
union between the inclined walls of a sulcus.