Dental Anatomy I Flashcards
Where does the lettering of Primary Dentition begin?
Right Maxillary 2nd Molar
How many primary teeth?
20
A through T
What are the 5 teeth in each quadrant in primary dentition?
Central incisor Lateral incisor Canine (cuspid) First molar Second molar
What 2 teeth have no proximal surface?
Central incisors
Distal surface 3rd Molar
What are the 4 axial surfaces of Posterior Teeth?
Mesial
Distal
Facial
Lingual
What 2 structures fuse to make up the Oblique Ridge?
Triangular ridge of distofacial cusp
Distal cusp ridge of the mesiolingual cusp
Why aren’t Oblique Ridges pure transverse ridges?
Both aren’t triangular
Where are Cervical Ridges found?
Greatest convexity
Facial and Lingual surfaces
Cervical
T/F
A sulcus and groove are the same
False
*sulcus is space above a groove
Where is a Sulcus found?
Between two ridges/cusps
T/F
The incisal ridge is not considered a surface
True
T/F
The mesioincisal line angle combines planes of two surfaces
False
Incisar ridge isn’t a surface, so 2 line angles come together
Name 3 line angles of the anterior teeth
Mesioincisal
Mesiofacial
Distofacial
T/F
Emergence and Eruption are the same
False
*emergence technically tooth 1st appearance through gingiva
When the apical foramen closes completely and calcification of a tooth is complete:
Root completion
What is the term for tooth loss?
Exfoliation
What is the 1st and last Primary Crown to be completed?
Months?
Maxillary Central Incisor
(1.5 months)
Maxillary 2nd Molar
(11 months)
T/F
All primary tooth crowns are completed by 1 year of age
True
What 2 teeth have completely formed crowns at birth?
Primary mandibular 1st molar
Primary mandibular Central Incisor
What teeth have begun calcification at birth?
Permanent Mandibular 1st Molars
At what age does anterior tooth spacing stop expanding?
6 years
What teeth erupt at 6 years?
Permanent 1st Molars
What 3 Permanent crowns have completely calcified at 6?
Incisors
1st Premolars
1st Molars
What contains the developing tooth?
Dental Follicle
*sac-like structure
Where is the follicle position in the development of permanent anterior teeth?
Lingual to Primary roots
Where is the developing tooth follicle of permanent premolars located?
within Bifurcation/Trifurcation of primary molar roots
Where are developing follicles located in relation to the primary Molar teeth?
Distal or Posterior
What permanent teeth initiate calcification from birth to 1 year?
First molar
Central incisor
Canine
Lateral incisor
What permanent teeth initiate calcification from 2 to 4 year of age?
Premolars
Second Molars
When have the 3rd molars begun calcification?
9 years
What is a single cone structure called?
Haplodont
What are 3 straight line cusps called?
Triconodont
What are 3 cusps in a primary triangle?
Tritubercular Molar
What are 4 cusps in a rectangular or rhomboid form?
Quadritubercular Molar
What 3 cusps make up the Trigon Primary Cusp Triangle?
What cusp is left out?
Mesiofacial
Distofacial
Mesiolingual
Distolingual left out
What 2 teeth have only one antagonist in the opposing arch?
Maxillary 3rd molars
Mandibular central incisors
What is the acronym to remember Proximal Contact Areas of the Maxillary Anterior Teeth?
IJJMJM
Match the Proximal Contacts: Midline: Distal of Central: Mesial of Lateral: Distal of Lateral: Mesial of Canine: Distal of Canine
Incisal third Junction of incisal/middle thirds Junction of incisal/middle thirds Middle third Junction of incisal/middle thirds Middle third
Contour and location of Maxillary anterior teeth for
Facial surface:
Lingual surface
Facial: 0.5 mm Cervical 3rd
Lingual: 0.5 mm Cervical 3rd
Contour and location of Maxillary posterior teeth for
Facial surface:
Lingual surface:
Facial: 0.5 mm Cervical 3rd
Lingual: 0.5 mm MIDDLE 3rd
How does the periodontal ligament attach the tooth to the alveolar bone?
Inserts into Cementum and bone
T/F
The periodontal ligament is functionally expressed as strategically placed fibers
True
Where is the smallest Embrasure in the maxilla?
anterior teeth
midline incisors
Where is the largest Embrasure in the maxilla?
anterior teeth
Between canine and premolar
T/F
Mesial portions of crowns are generally more developed than distal
True
T/F
Mesial cusps are smaller than distal cusps
False
T/F
Mesial marginal ridges are usually taller than distal marginal ridges
True
*1st premolar exception
T/F
Molars taper mesiodistally
True
What 2 teeth don’t taper faciolingually?
Maxillary 1st molar
Mandibular 2nd premolar
Y-grooved
