Intro to tooth morphology Flashcards
Name the arches of the head?
Maxillary arch (top) Mandibular arch (bottom)
Name each quadrant of the head?
Right and left maxillary quadrant
Right and left mandibular quadrant
Give the specific name to each tooth
Central and lateral incisors
Canine
1st and 2nd premolar
1st, 2nd and 3rd molar
Describe the shape of the incisors?
Like a thin blade
Describe the shape of the canines?
Cone-shaped crown
Describe the shape of the premolars and molars?
A mountain range with a low valley at the centre
FDI (nomenclature example)
Two-digit system Split into quadrants 1 | 2 3 | 4 e.g. central incisors will be 11/12 21/22 31/32 41/42
Palmer notation (nomenclature example)
Split into quadrants
Each tooth numbered (1-8)
e.g. | (1) number in box
| (1)
What is the basic tooth structure?
Apex Root Cement Enamel Junction Crown Incisal edge
What is the surface for the anterior teeth?
Labial (but appropriate also named buccal)
What is the surface for the posterior teeth?
Buccal
What is the biting surface of the incisors and canines called?
Incisal
What is the biting surface of the premolars and molars?
Occlusal
Explain how a tooth can be divided into 3rds for surface descritpion?
For purposes of description, the crowns and roots of teeth have been divided into thirds, and junctions of the crown surfaces are described as line angles or point angels
What is the cusp? (tooth surfaces)
The elevation of the
crown portion of a tooth
making up a divisional part
of the occlusal surface
What is the ridge? (tooth surfaces)
The linear elevation on
the surface of a tooth and
is named according to its
location
What is the Marginal Ridge? (tooth surfaces)
The rounded borders of the enamels that form the proximal margins of the occlusal surfaces of premolars and molars and the proximal margins of the lingual surfaces of the anterior teeth
What is the Tubercle? (tooth surfaces)
A smaller elevation on some portion of the crown produced by an extra formation of enamel (deviations form the typical form)
What is the Cingulum? (tooth surfaces)
Lingual lobe of an anterior tooth. It makes up the bulk of the cervical third of the lingual/palatal surfaces
What is the Lobe? (tooth surfaces)
One of the primary
sections of formation in the
development of the crown
What is the Mamelon? (tooth surfaces)
Any one of the three
rounded protuberances found
on the incisal ridges of newly
erupted incisor teeth
What are the triangular ridges? (tooth surfaces)
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
(behind the front teeth)
What is the transverse ridge? (tooth surfaces)
The union of two triangular ridges crossing
transversely the surface of a posterior tooth
What is the oblique ridge? (tooth surfaces)
a ridge crossing obliquely the occlusal surfaces of maxillary
molars and formed by the union of the triangular ridge of the distobuccal (DB) cusp and the distal cusp ridge of the mesiopalatal (MP) cusp
