Intro to tooth morphology Flashcards
Name structures A-E
A = apex
B= root
C = cervical line / cementum enamel junction (CEJ)
D = crown
E = incisal edge
Name structures A-E
ALVEOLAR BONE
PULP
DENTINE
CEJ
ENAMEL
What is the anatomical crown vs clinical crown?
anatomical crown - technically where the crown is
clinical crown is what you can see upon examination (it may be smaller or larger than the anatomical crown)
What is labial surface?
Anterior teeth: Labial surface (the surface towards the lips)
What is a buccal surface?
Posterior teeth: Buccal surface (the surface facing the cheeks)
What is palatal?
Towards or adjacent to the palate (maxillary teeth)
What is lingual?
Towards or adjacent to the tongue (mandibular teeth)
What is a proximal surface?
The area between adjacent tooth surfaces is called interproximal space
What are the 2 types of proximal surfaces?
mesial - towards midline
distal - away from midline
What 2 teeth don’t have a mesial surface?
the 1s
Describe the mesial surface?
Mesial points towards the midline.
Describe the distal surface
Distal points away from the midline.
What are the 2 biting surfaces of teeth?
incisal or occlusal
Describe incisal surfaces
the surfaces of the incisors or canines that contact with the opposing jaw.
Describe the occlusal surfaces
surfaces of the premolars or molars that contact with the opposing jaw.
Describe the 3 sections of a root
cervical
middle
apical
Name the 3 thirds of the crown of a molar tooth (top to bottom)
occlusal
middle
cervical
Name the 3 thirds of an incisor tooth
incisal
middle
cervical
What is the cusp of a tooth?
Elevation of the crown portion of a tooth making up a divisional part of the occlusal surface.
What is the ridge of a tooth?
linear elevation on the surface of a
tooth.
What is the marginal ridge?
rounded borders of the enamels that form the proximal margins of the occlusal surfaces of premolars and molars and the proximal margins of the anterior teeth.
What tooth surface is this?
marginal ridge
What tooth surface is this?
cusps
What tooth surface is this?
ridge
What is a triangular ridge?
descend from the tips of the cusp of posterior teeth towards the central part of the occlusal surfaces. They are named after the cusps to which they belong
What is a transverse ridge?
the raised surface connecting two triangular ridges crossing transversely the surface of a posterior tooth.
What tooth surface is this?
transverse ridge
What is an oblique ridge?
Raised tooth surface, crossing obliquely (crossing) the occlusal surfaces of maxillary molars. Example U6 oblique ridge formed by the union of the DB cusp and the MP cusp.
What tooth surface is this?
oblique
What is a tubercle?
is a smaller elevation on some portion of the crown produced by an extra formation of enamel (deviations form the typical form).
What tooth surface is this an example of?
tubercle
What is a cingulum (CI) tooth surface?
Lingual lobe of an anterior tooth. It makes up the bulk of the cervical third of the lingual/palatal surfaces.
What is a mamelon surface of a tooth?
Any one of the three rounded protuberances found on the incisal ridges of newly erupted incisor teeth.
What is this an example of?
mamelons
What is a lingual fossa?
Lingual surfaces of incisors.
What is a central fossa?
occlusal surface of
molars. Formed by the convergence of ridges
What is the circle showing?
central fossa
What is the triangle showing here?
triangular fossa
What is a supplemental groove?
shallow linear depression on the surface of a tooth
(Supplemental to a developmental groove and does not mark the junction of primary parts).
