Describing teeth Flashcards
Open photos and look at picture one
What is tooth A showing
Describe tooth A
The labial (buccal) view
symmetrical narrow trapezoid (narrower cervically).
Narrower mesio-distal than labio-lingual
Smaller than lateral incisor.
There is also a lingual fossa and a small cingulum
Open photos and look at picture 11
Describe the cusp form of this tooth from the labial view
From the labial view their is a straight mesial surface visible.
The mesial incisal angle is close to 90 degrees
There are straight incisal edge, rounded distal incisal angle, convex distal surface.
Open photos and look at picture one
What is tooth B showing
Mesial & distal view: triangular or wedge shaped outline.
Open photos and look at picture one
What is tooth C showing
The incisal view
Fairly straight and symmetrical
Open photos and look at picture one
Describe theincisor form of this tooth from the labial view
Straight incisal edge
The mesio-incisal and disto-incisal angles are almost 90 degrees.
The disto-incisal angle may be slightly more rounded than the mesio-incisal angle.
Open photos and look at picture one
Describe the incisor form of this tooth from the medial and distal surfaces
The mesial and distal surfaces are very similar with minimal incisal third convexity, the middle and cervical thirds are flattened.
Open photos and look at picture one
What is tooth D showing
Mesial view: the labial surface is smooth and convex
The lingual surface is mildly concave in the incisal and middle 1/3, with a small convex cingulum.
Open photos and look at picture one
Name the tooth and give both its alphanumeric and FDI classification
Mandibular right central incisor
Alphanumeric: LR1
FDI classification: 4 1
Open photos and look at picture one
What is tooth E showing
Distal view: the labial surface is smooth and convex
The lingual surface is mildly concave in the incisal and middle 1/3, with a small convex cingulum.
Open photos and look at picture 3
What is tooth B showing
Describe tooth B
The lingual view
Has mesial and distal marginal ridges
Theres a lingual fossa
Very slight lingua ridge
Open photos and look at picture one
What is the root form of this tooth?
Single, narrow, conical root,
Flattened mesio-distally.T
he root tends to curve distally and the distal root groove is more marked.
Open photos and look at picture 2
What is tooth A showing
Describe tooth A
The labial view
narrow trapezoid,
Incisal edge is wider than than central incisor giving fan-shaped outline
Crown slightly larger than central.
There are imbrication lines
Mesial incisor edge is sharper than the distal incisor edge
Open photos and look at picture 2
What is tooth B showing
Describe tooth B
The lingual view
Has a cingulum that is placed more distally
Has a lingual fossa
Mesial marginal ridge is longer than the distal marginal ridge
Open photos and look at picture 2
What is tooth D showing
Describe tooth D
The mesial view
wedge-shaped or triangular outline
Tooth looks more straight than on the distal view
Open photos and look at picture 4
What is tooth E showing
Describe tooth E
The distal view
Distal outline is rounder
Open photos and look at picture 2
What is tooth E showing
Describe tooth E
The distal view
wedge-shaped or triangular outline
Has a twist towards the distal side
Open photos and look at picture 2
What is tooth C showing
Describe tooth C
Cusp (incisal) form
Labial view: Flat incisal edge, rotated on the root with the distal incisal corner lingually placed to follow line of dental arch.
Convex distal surface and rounded distal incisal angle.
Mesial crown profile more flat and the mesio-incisal angle is sharp.
The incisal edge slopes slightly from longer mesial surface of crown.
Open photos and look at picture 2
Describe the root form for this tooth
Single, narrow, conical root, flattened mesio-distally.
The root tends to curve distally and the distal root groove is more marked.
Root is slightly wider, longer, thicker than lower central incisor.
Open photos and look at picture 3
What is tooth A showing
Describe tooth A
The labial view
A long pentagon shaped tooth
Crown is generally smaller and narrower mesio-distally giving the appearance of the mandibular tooth being longer than the maxillary
Has a single cusp tip
Mesial cusp slope is shorter than the distal cusp slope
Slight labial ridge
Canines are the longest tooth in the dentition
Open photos and look at picture 3
What is tooth D showing
Describe tooth D
The mesial view
Wedge/triagular shaped
Labio palatal diameter of crown is smaller Han the maxillary canine
Mesial outline is straighter than the distal
Open photos and look at picture 3
What is tooth E showing
Describe tooth E
The distal view
Wedge shaped
Labio palatal diameter of crown is smaller Han the maxillary canine
Distal line I both shorter and rounder than the mesial outline
Open photos and look at picture 3
What is tooth C showing
Describe tooth C
The incisal view
Incisal ridge divided into mesial and distal slopes. The shorter, more horizontal, mesial slope meets the longer, steeper, distal ridge to form an obtuse (blunt) angle at a cusp tip.
The tip is less pointed and may be more lingually placed than maxillary canine. The distal surface is convex, giving a rounded crown profile, in the incisal two thirds (slightly concave in the cervical third).
The mesial surface is approximately a straight line and continuous with the mesial surface of the root.
Crown appears to lean distally in relation to the root.
Open photos and look at picture 3
Describe the incisal form of the tooth from the mesial/distal view
Labial surface is slightly convex and continuous with the convexity of the root.
Compared to the maxillay canine the lingual surface is concave but smoother, the cingulum is low and less developed, marginal ridges are less prominent.
Open photos and look at picture 3
Describe the root form for this tooth
Usually a single long root, with an oval cross section, flattened mesio-distally. Root tends to curve distally. Occasional apical third bifurcation into labial and lingual roots.
Open photos and look at picture 4
Name the tooth and give both its alphanumeric and FDI classification
Mandibular right first premolar
LR4
4 4
Open photos and look at picture 4
What is tooth A showing
Describe tooth A
The buccal view
Has a long pointed buccal cusp and and a non non functional lingual cusp
Buccal cups is slightly mesial and so the mesial slope of the buccal cusp is shorter than the distal slope (similar to the mandibular canine)
Open photos and look at picture 4
What is tooth B showing
Describe tooth B
Lingual view
Theres a mesial lingual groove between lingual cusp and the mesial marginal ridge
Small lingual cusp (smaller than buccal cusp)
Open photos and look at picture 4
What is tooth C showing
Describe tooth C
The occlusal view
Open photos and look at picture 4
describe the Outline form from the occlusal view of this tooth
(TOOTH C)
Diamone shaped occlusal outline
Buccal triangular ridge is longer than the lingual trianglular ridge
Mesio-lingual portion of crown outline is pushed in
Outline usually isn’t symmetrical
Sometimes the Mesial and distal marginal ridges converge symmetrical towards the lingual cusps forming a triangular outline
there are mesial dips and fossa
The crown is the smallest of all the premolars
Open photos and look at picture 4
Describe the cusp form of this tooth from the occlusal view
Dominant pointed buccal cusp
Very small lingual cusp
Due to convexity of the buccal cusp its tip is almost central places in the middle of the occlusal surface
A poorly developed mesio-distal occlusal fissure divided into a smaller mesial and a larger distal fossa by a central enamel ridge. A mesio-lingual developmental groove separates the mesial marginal ridge from the lingual cusp.
How can you distinguish between the right and left side of the central incisor
Mesial incisal angle is sharper whereas the distal incisal angle is a little bit rounder
Where is mesial contact in the canines and incisors?
The incisal third
Open photos and look at picture 4
What is the cusp form of this tooth from the mesial/distal view
he occlusal surface slopes markedly lingually by approximately a 45 degree angle
The cusps convexity and hanging small lingual cusp a marked lingual inclination of the crown (almost straight lingual surface)
Open photos and look at picture 4
Describe the root form for this tooth
Usually a single long root, with an oval cross section (flattened mesio-distally)
A single tapered, oval shaped root, usually curves distally. Mesial root groove more marked.
What is the man difference between the first and second pre molar?
The first pre molar is usually smaller than the second pre molar
Also the crown is wider bucco-lingually than the 1st premolar
Open photos and look at picture 4
What is tooth D showing
Describe tooth D
The mesial view
Mesial outline is slightly concave
There is a lingua inclination of the crown and so buccal cusp tip is near the long axis of the tooth
Open photos and look at picture 2
Name the tooth and give both its alphanumeric and FDI classification
Mandibular right lateral incisor
LR2
4 2
Open photos and look at picture 5
Name the tooth and give both its alphanumeric and FDI classification
Mandibular right second premolar
LR5
4 5
Open photos and look at picture 5
What is tooth A showing
Describe tooth A
The buccal/ labial view
The buccal cusp is shorter than the 1st premolar and its tip is located more to the buccal side
The mesial and distal contacts are located just under the junction of the occlusal and middle thirds
Open photos and look at picture 5
What is tooth B showing
Describe tooth B
The lingual cusp
smaller the the buccal cusp (but bigger than the first premolar)
In the 3 cusp cavitation there is a lingual groove separating the mesial lingual and distal lingual cups
Open photos and look at picture 5
What is tooth C showing
Describe tooth C
The occlusal view
Open photos and look at picture 5
What is tooth D showing
Describe tooth D
The mesial view
The mesial marginal ridge is 90 degrees to the long axis of the tooth
Open photos and look at picture 5
What is tooth E showing
Describe tooth E
The Distal view
This tooth is wider in the buccal lingual direction than the first pre molar
Open photos and look at picture 5
Describe the outline form of this tooth from the occlusal view
2nd Premolars can have 2 (43%) giving them a rounded occlusal outline
3 cusps (54%) giving the a square occlusal outline
Larger crown than mandibular first premolar. No mesio-distal flattening.
Open photos and look at picture 5
Describe the cusp form of a 3 cusp premolar
The 3 cusps are more equal in size and less pointed with a single buccal cusp and 2 lingual cusps taller and wider mesio- lingual than the disto-lingual cusp).
The buccal cusp is more rounded and shorter than that of the mandibular first premolar
Open photos and look at picture 5
Describe the cusp form of a 2 cusp premolar
There is a central curving occlusal fissure (U-groove)
around the buccal cusp. This joins the 2 mesial and distal fossae
Distal fossa is larger than the mesial fossa
Open photos and look at picture 12
Describe the cusp form of this tooth from the mesial/distal view
Shallow convex or almost flat labial surface
Look at picture 6
What type of groove does picture B exhibit
H-groove
Look at picture 6
What type of groove does picture C exhibit
Describe it
Y-groove
There is a v shaped central groove that connects to the lingual groove to give a y shaped groove pattern
A central pit is at the junction of the central and lingual groove and heres often a mesial margin
Open photos and look at picture 7
Name the tooth and give both its alphanumeric and FDI classification
Mandibular right first molar
LR 6
4 6
Open photos and look at picture 7
What is tooth A showing
Describe tooth A
Buccal view There are three cusps visible: the mesial buccal the distal buccal the distal There are two grooves: The distal buccal groove the mesial buccal grooves (ends in a pit)
Open photos and look at picture 7
What is tooth B showing
Describe tooth B
Lingual View Can see the: large mesial lingual cusp bulge of the distal cusp lingual groove
Open photos and look at picture 7
What is tooth C showing
Describe tooth C
Occlusal view
Pentagon shaped outline
Largest occlusal surface of all mandibular teeth and the only one with 5 cusps
Can see the buccal ridge, the buccal groove, the distal buccal groove, the central groove, the lingual groove, mesial buccal groove, distal buccal groove.
Theres a mesial triangular fossa and a distal triangular fossa
there are triangular ridges on all 5 cusps and a central pit in the middle
The the tooth is wider on the mesial than distal
Open photos and look at picture 7
What is tooth D showing
Describe tooth D
Mesial view
Buccal height of contour is in the cervical third
The lingual height of contour is in the middle third
Theres a mesial marginal ridge
Open photos and look at picture 7
What is tooth E showing
Describe tooth E
Distal view
You can see the tall mesial lingual cusp
Can see the distal cusp and the distal buccal groove
Distal marginal ridge is visible
Open photos and look at picture 7
Describe the outline form of this tooth from the occlusal view
Pentagon outline (five-cusped).
Largest occlusal outline of all mandibular teeth.
The crown is longer mesio-distally in comparison to its bucco-lingual width (unlike maxillary molars) and is longer on the buccal surface than the lingual surface with the mesial and distal surfaces converging towards the lingual.
The crown of a first molar also tapers and converges towards the distal surface.
Open photos and look at picture 7
Describe the outline form of this tooth from the mesial/distal view
The lingual surface is flat in comparison with the convex, lingually inclined buccal surface
Open photos and look at picture 7
Describe the cusp form of this tooth from the occlusal view
Mesial and distal buccal are the same height
They are separated by a mesio-buccal groove which ends in a buccal pit
A disto-buccal groove separates these from the minor distal cusp. Two major lingual cusps Mesial Lingual, Distal Lingual.
The Mesial Buccal cusp is wider than either of the lingual cusps, which are about the same size
The Distal Buccal cusp is the smallest of the four major cusps, and the distal is the smallest of all five major cusps. The lingual cusps tend to be taller and more pointed; the tips of the buccal cusps are displaced lingually, are rounded, and are lower than the lingual cusps. The mesial marginal ridge is taller than the distal ridge.
What are the 5 cusps on the first molar called?
Mesial buccal Distal buccal Mesial lingual Distal lingual Distal cusp
Look at picture 7
What does the occlusal fissure diplay in most cases?
Displays a dryopithecus pattern with a Y-shape instead of the cross shaped fissure pattern typical of mandibular molars
The Y-shaped fissure results from the two buccal fissures and single lingual fissure meeting at a central fossa.
Open photos and look at picture 7
Describe the cusp form of this tooth from the buccal view
The distal profile of the crown is convex while the mesial profile of the crown is convex at the muffle and occlusal thirds. The cirvical third is concave
Open photos and look at picture 5
Describe the root form for this tooth
Single conical root with a rounded cross section, flattened slightly mesio-distally, curves distally. The root is slightly longer than first mandibular premolar.
Open photos and look at picture 7
Describe the root form for this tooth
Two roots, the mesial root is generally flattened with a longitudinal groove on its mesial surface, and curves distally. The distal root is more rounded, slightly shorter and less curved.