Flashcards in Dental Anatomy II Deck (105):
How many lobes of calcification do the Primary Maxillary Incisors arise from?
What features do Primary Maxillary Incisors lack?
Name 2 ways the Primary Maxillary Central Incisor differs from Lateral (aside from root differences).
Name 2 ways the Primary Maxillary Central Incisor differs from the Lateral in the root?
(Lateral Apex - pointed)
Mesiodistal length > Cervicoincisal length in Primary Mandibular Incisors
Describe the incisal ridge for Primary Mandibular Incisors
In what teeth are the normal Proximoincisal angles reversed?
Primary Mandibular Incisors
Proximal contacts taper evenly in Primary Mandibular Incisors
*very symmetrical from Facial View
How much larger is the root than crown in Primary Mandibular Incisors?
From what angle are all 3 roots visible for the Primary Maxillary 1st Molar?
In the Primary Maxillary 1st Molar, which is the shortest root?
Smallest (shortest) Cusp?
In the Primary Maxillary 1st Molar, everything
(cervical convexity, distal marginal ridge, distal marginal ridge groove)
is small, Except?
*distance from CEJ to furcation
From the Distal view, the cervical line is straight in the Primary Maxillary First Molar.
*curves up Facially
Starting with the largest, name the 5 cusps of the Primary Maxillary 2nd Molar.
The distal convergence in the Primary Maxillary Second Molar suggests what shape?
What are 2 very prominent topographical features of the Primary Maxillary Second Molar?
Compared to the Oblique Ridge, where is the Transverse Ridge located in the Primary Maxillary 2nd Molar?
What are the major and minor fossae of the Primary Maxillary 2nd Molar?
Major: Central and Distal
Minor: Mesial Triangular and Distal Triangular
Another name for the Distal Oblique Groove in the Primary Maxillary 2nd Molar.
Lingual Developmental Groove
What crosses the Oblique Ridge in the Primary Maxillary 2nd Molar?
What 2 features does it connect?
Central and Distal pits
How many Cusps and Roots are visible from the distal view of the Primary Mandibular 1st Molar?
How is the Distofacial Cusp positioned in relation to the Mesiofacial Cusp in the Primary Mandibular First Molar?
The Primary Mandibular 1st Molar has a straight cervical line
The Distal Root converges to the apex in the Primary Mandibular 1st Molar
Where is the Developmental Root Surface Depression in the Primary Mandibular 1st Molar?
What tooth appears to be 2 different teeth fused?
Primary Mandibular 1st Molar
The mesial surface outline of the crown (from the facial view) of the Primary Mandibular 1st Molar looks like what?
Where are the Proximal contact points for the Primary Mandibular 1st Molar?
Middle 1/3, Occlusal portion
Describe the Facial Developmental Groove in the Primary mandibular 1st Molar?
Where does the Cervical Line dip from the facial view of the Primary Mandibular 1st Molar?
Describe the Cervical Ridge of the Primary Mandibular 1st Molar.
Convex mesially, then fades
In what tooth is the Mesial Root longer and straighter than the distal?
Primary Mandibular 1st Molar
How much bigger is the crown and root in the Primary Mandibular 1st Molar?
20% taller crown
1/3 longer root
What tooth has a rectangular crown outline?
Primary Mandibular 2nd Molar
What tooth resembles the Permanent Mandibular 1st Molar?
Primary Mandibular 2nd Molar
2 convergences of the Primary Mandibular Second Molar:
What cusps of the Primary Mandibular Second Molar are nearly equal in size?
The Primary Mandibular 2nd Molar has a long and windy...
Central Developmental Groove
Describe the marginal ridge grooves in the Primary Mandibular 2nd Molar:
What separates the 3 facial cusps and 2 lingual cusps of the Primary Mandibular 2nd Molar?
What are the 3 major fossae of the Primary Mandibular 2nd Molar?
Why are there no Transverse Ridges in the Primary Mandibular 2nd Molar?
No triangular ridges (of which there are many) meet
Name 2 Root Anomalies
(pulp chamber enlarged, bull horns)
What root anomaly only occurs in permanent teeth?
Floor of the pulp is lower in both Taurodontism and Pyramidism
What makes up an Enamel Pearl?
Where are enamel pearls usually found?
(anything with multiple roots)
How do enamel pearls appear radiographically?
(and small, round)
In what 2 locations are enamel pearls mostly found?
Distal of 3rd molars
Facial root furcation molars
What are extensions of the crown onto the root surface between roots called?
In what teeth is Dens-in-Dente found?
Maxillary Lateral Incisors
Enamel invagination occurs in what condition?
An infolding of dental papilla during development can lead to...
What feature is found on newly erupted Maxillary incisors?
Where are the marginal ridges found in Maxillary Incisors?
Mesial and Distal borders of Lingual surfaces
Maxillary Central Incisor
Where is the interproximal contact for Maxillary Central Incisors?
The mesiodistal bisecting plane is _____ to the incisal edge
(Maxillary central Incisor)
The faciolingual bisecting plane is _____ to the incisal edge
(Maxillary central incisor)
The marginal ridges and cingulum are more prominent in lateral incisors
Compare the lingual fossa in the Central and Lateral Maxillary insisors
Central: trapezoidal, moderately deep
Lateral: triangular, deep
The outline of the Central Incisor is ____ from the incisal view
The outline of the Lateral Incisor is _____ from the incisal view
The Central Incisor is larger and more angular than the Lateral.
In what direction is the lateral incisor root pointed?
What exhibits more variation, central or lateral incisor?
*one of most variable permanent teeth
What are 3 similarities of the Central and Lateral Incisors?
Cingulum offset distally
Centered faciolingual contact (incisal view)
Incisal edge centered over CEJ and Roots
What incisor has a lingual pit?
Where is the incisal ridge of the Mandibular Central?
What shape is the lingual fossa of the Mandibular Central Incisors?
What is the narrowest tooth mesiodistally?
Mandibular Central incisors
Incisal line angles of Mandibular central incisors are much more squared than Maxillary
What tooth crown is considered bilaterally symmetrical?
Mandibular Central Incisors
Where are the mesial and distal proximal contacts of the Mandibular Incisors?
High Incisal third
Mandibular Central Incisor Root is _____ faciolingually and _____ mesiodistally
What is found on both mesial and distal root surfaces of the Mandibular central incisors?
*tendency for 2 canals
Mandibular central incisor sometimes has 2 roots
What Mandibular Incisor is smaller?
What Mandibular Incisor is more angular?
What Mandibular Incisor more often has 2 Pulp canals?
The crest of the cingulum is centered in both Mandibular Incisors
Describe the lingual surface anatomy of the Mandibular Incisors
What Mandibular incisor has less embrasure?
Both Mandibular incisors have a lingually positioned incisal edge
What teeth is the longest?
(both Maxillary and Mandibular)
What tooth has the longest root?
Canines are anterior teeth
*biggest faciolingual dimensions
What edge of a Maxillary canine appears "pinched?"
Canine cusp tip is often lingual to the faciolingual bisector
**most often centered
The Maxillary canine has the greatest cervical ridge prominence and greatest facial ridge prominence of any permanent anterior tooth
How is the distal contact area positioned faciolingually and cervicoincisally in the Maxillary Canine?
Where is the curvature of the cervical line of a Maxillary Canine more consistent?
What tooth has the largest cingulum of the Anterior?
The cingulum of the Maxillary Canine is centered
Describe the lingual ridge in the Maxillary Canine
thick and short
What marginal ridge is larger in the Maxillary Canine?
Describe the mesial crown and root of the Mandibular Canine
Where is the cusp tip of the Mandibular Canine located?
What cuspal ridge is longer in the Permanent Mandibular Canine?
What two teeth have a semicircular cervical curvature?
Maxillary Central Incisor
What has the longest root length of any Mandibular tooth?
What tooth has the greatest cervicoincisal crown length?
How is the facial outline shaped from a proximal view
C - shaped
Where is the cusp tip in the Mandibular Canine in relation to the faciolingual bisector?
*all mandibular anterior the same
What are the 2 fossae of the Mandibular Canine?