Efda study guide Exam Questions and
Answers 100% Pass
Incisal edge - ✔✔formed by the junction of the linguoincisal surfaces of
an anterior tooth.
created a surface linguoincisally. This surface forms an angle with
the labial surface.
Lobe - ✔✔a developmental segment of the tooth. they
coalesce to form a single unit.
Mamelon - ✔✔a rounded or conical prominence on the incisal ridge of a
newly erupted incisor. They are usually three in number and soon
disappear as the result of wear.
Ridge - ✔✔a linear elevation on the surface of a tooth. It is named
according to its location or form.
Cusp ridge - ✔✔an elevation which extends in a mesial and distal direction from the
cusp tip. They form the buccal and lingual
margins of the occlusal surfaces of the posterior teeth.
Incisal ridge - ✔✔the incisal portion of a newly erupted anterior tooth
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
, Marginal ridges - ✔✔elevated, crests or rounded folds of enamel which
form the mesial and distal margins of the occlusal surfaces of the
posterior teeth and the lingual surfaces of anterior teeth.
Oblique ridges - ✔✔elevated prominences on the occlusal surfaces of a
maxillary molar extending diagonally from the tips of the
mesiolingual cusp to the distobuccal cusp.
Triangular ridges - ✔✔prominent elevations, triangular in cross section,
which extend from the tip of a cusp toward the central portion of the
occlusal surface of premolars and molars. They are named for the
cusp to which they belong.
Supplemental groove - ✔✔an indistinct linear depression, irregular in
extent and direction, which does not demarcate major divisional areas
of a tooth. These often give the occlusal surface a wrinkled
appearance.
Developmental groove - ✔✔a groove formed by the union of two lobes
during growth of the crown.
Groove - ✔✔a small linear depression on the surface of a tooth.
Triangular fossa - ✔✔a comparatively shallow pyramid-shaped depression
on the occlusal surfaces of the posterior teeth, located just within the
confines of the mesial and/or distal marginal ridges.
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
Answers 100% Pass
Incisal edge - ✔✔formed by the junction of the linguoincisal surfaces of
an anterior tooth.
created a surface linguoincisally. This surface forms an angle with
the labial surface.
Lobe - ✔✔a developmental segment of the tooth. they
coalesce to form a single unit.
Mamelon - ✔✔a rounded or conical prominence on the incisal ridge of a
newly erupted incisor. They are usually three in number and soon
disappear as the result of wear.
Ridge - ✔✔a linear elevation on the surface of a tooth. It is named
according to its location or form.
Cusp ridge - ✔✔an elevation which extends in a mesial and distal direction from the
cusp tip. They form the buccal and lingual
margins of the occlusal surfaces of the posterior teeth.
Incisal ridge - ✔✔the incisal portion of a newly erupted anterior tooth
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
, Marginal ridges - ✔✔elevated, crests or rounded folds of enamel which
form the mesial and distal margins of the occlusal surfaces of the
posterior teeth and the lingual surfaces of anterior teeth.
Oblique ridges - ✔✔elevated prominences on the occlusal surfaces of a
maxillary molar extending diagonally from the tips of the
mesiolingual cusp to the distobuccal cusp.
Triangular ridges - ✔✔prominent elevations, triangular in cross section,
which extend from the tip of a cusp toward the central portion of the
occlusal surface of premolars and molars. They are named for the
cusp to which they belong.
Supplemental groove - ✔✔an indistinct linear depression, irregular in
extent and direction, which does not demarcate major divisional areas
of a tooth. These often give the occlusal surface a wrinkled
appearance.
Developmental groove - ✔✔a groove formed by the union of two lobes
during growth of the crown.
Groove - ✔✔a small linear depression on the surface of a tooth.
Triangular fossa - ✔✔a comparatively shallow pyramid-shaped depression
on the occlusal surfaces of the posterior teeth, located just within the
confines of the mesial and/or distal marginal ridges.
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
