Tooth ID Lecture Flashcards
Anterior Teeth vs. Posterior Teeth
Anterior: incisal surface or single cusp
Posterior: more than one cusp
Mesial vs. Distal
From labial view
Mesial surface of crown is straighter
Mesio-incisal line angle is more sqaure
Distal surface of crown is more rounded or curved
Disto-incisal line angle is more round
Which outline of crown has more curvature
CI or LI?
LI
Which has more distinct lingual anatomy
Maxillary or Mandibular Incisors?
Lateral or Central?
Maxillary Lateral
Maxillary CI
Facial View
Crown of CI is widest mesiodistally of any of the anterior teeth
Mesiodistal dimension is close to incisocervical dimension
Crown is somewhat square
Surface is smooth and convex
Maxillary CI
Incisal View
Incisal View:
Cingulum may bulk to the distal
Triangular
Maxillary LI compared to CI
Facial View
Outline not as ____ as CI
____ bulky and ____ slender than CI
MD ____ than CI
Shape?_____
- Longer____
- Shorter ____
Significant ___ of ___ ____
IC and MD dimensions are ____ (rounded_
Facial view:
Outline not as square as CI
Less bulky and more slender than CI
MD narrower than CI
Rectangular
Longer incisocervically
Shorter mesiodistally
Significant rounding of disto-incisal line angle
IC and MD dimensions are convex (rounded
Mandibular Incisors
CI vs LI
Cingulum
Centered on mandibular CI
Offset to distal on mandibular LI
Bulk rightà It’s a right
Bulk leftà It’s a left
Man CI
Incisal line angles
Mesial and Distal surfaces
Central Incisor (Just identify as 24/25)
Incisal line angles are square
Mesial and Distal surfaces are straight
Mandibular Lateral Incisor
Distoincisal line angle is rounded
Sometimes seen on mandibular central incisors
Canine
Maxillary vs. Mandibular
Crown
- Maxillary:
- Short and Wide
- In line with long axis of tooth (from facial)
- Mandibular:
- Long and narrow
- Tilts lingually relative to long axis of root (from facial)
Labial and Lingual View
Canine
Note: The crowns of some maxillary canines are ___ ____
Lingual View:
Labial View
Note: Crowns of some maxillary canines are long incisocervically
Lingual ViewHas marginal ridges, large cingulum and a mesial and distal fossa
Distal fossa is deeper than mesial fossa
Canine Proximal View
Maxillary vs. Mandibular
Incisal Surface
Incisal Surface
Maxillary canine: Labial to long axis of the tooth
Mandibular canine: Lingual to long axis of the tooth
Incisal View
Maxillary vs. Mandibular Canine
Maxillary
Can see a lot of the lingual surface
Mandibular
Can see a lot of the facial surface
R vs. L
Maxillary Canine
_____ ____ than mandibular
___ ___ ___ ___ in the ____ ___ of the ___
Incisal View:
____
____
Wider mesiodistally than mandibular
Distal contact area protrudes in middle 1/3 of crown
Incisal view:
Mesial surface is straighter.
Distal surface is more curved
R vs. L Mandibular Canine
Mesial surface is ____
Distal surface is more ___
Incisal view:
____
Mesial surface is ___
Distal surface is ___
Crown is long and narrow
Mesial surface is straighter
Distal surface is more curved
Incisal view:
Can see small amount of cingulum
Mesial surface is straighter
Distal surface is rounded
Premolars: Max vs. Man
Cusp size:
Maxillary: two cusps are approx equal size
Mandibular: buccal cusp > lingual cusp
Central groove
Maxillary: centered buccolingually
Mandibular: slightly to the lingual
PM Occlusal Outline
Occlusal Outline
Mandibular PM1: diamond shaped
Mandibular PM2: square
Maxillary premolars: rectangular (long buccolingually)
Max PM1 vs PM2
Maxillary Roots:Max PM1: 2 roots
Any separation of root
Max PM2: 1 root
Maxillary R vs. L
From incisal view Lingual cusp tip offset to mesial
THESE ARE THE ONLY TEETH THAT OFFSET TO MESIAL
Mesial to the rightà it’s a right
Mesial offset of lingual cusp can be viewed from lingual view
Mesial ridge of Lingual cusp is shorter than distal ridge.
Mandibular PM1 vs PM2
PM1: 2 cusps
Lingual cusp is very small
PM2: 3 cusps
1 buccal and two lingual
Mesiolingual cusp is largest of the two lingual cusps
Distolingual cusp may be indistinct
Mandibular PM1 right vs. left
___ ___ ___
___ ____
____ ___ ____
___ degree ___ __ ___
___ ___ on ____
- Bulk to ___
___ ___ is ___ ___ but some specimens do not have it
Small lingual ridge
Transverse ridge
Mesiolingual developmental groove
45 degree mesial marginal ridge
Heavy taper on mesiolingual
Bulk to distal
Mesiolingual notch is normally present but some specimens do not have it
Molars
M1 vs M2
M1: 5 cusps
- Maxillary: Cusp of Carabelli
- On the lingual of the mesiolingual cusp
- Mandibular: distal cusp (smallest)
- On the buccal
M2: 4 cusps
Molars
Maxillary vs. Mandibular
Incisal View:
Roots:
Incisal view
Maxillary are wider buccolingually
Mandibular are wider mesiodistally
Roots
Maxillary: 3 roots
Mandibular: 2 roots
Molars R vs. L
Maxillary:
____ ___ ___
___ ____ ___
Mandibular M1: ___ ___
R vs. L
Maxillary:
Largestà mesiolingual cusp
Smallestàdistolingual cusp
Mandibular M1: distal cusp
Maxillary Molars
Maxillary molars
Oblique ridge connects distobuccal cusp and mesiolingual cusp
Mandibular Molars M1 vs. M2
Transverse ridges:
M2:
- Cusps:
- Occlusal view:
- _____
- _____
Transverse ridges:
M1: no transverse ridges
M2: 2 transverse ridges
M2:4 cusps of about equal size
Mesiobuccal is largest of 4 cusps
Occlusal view:
Mesial to distal taper
Widest at mesio and narrows in buccolingual dimension twds the distal
Buccal ridge of distobuccal cusp is fairly vertical
Buccal ridge of mesiobuccal cusp tilts lingually
Easier to see down buccal on mesiobuccal cusp
