Tooth Morphology Flashcards
What tooth has a distal border longer than the mesial border?
Canine
What canine is more diamond shaped? (Upper or lower)
Upper
What kind of tooth (upper) has a cingulum leaning distally?
Canine.
What tooth has the longest root?
The canines.
What tooth has 2 shallow fossae on the palatal surface of the upper jaw?
Canine.
What canine is more slender, smaller and symmetrical? Upper or lower?
Lower.
The lower canine is ?? inclined
Lingually
The features of a lower canine are.. in comparison to the upper. (Fossae/cingulum)
Less pronounced.
How many roots do upper first premolars have?
2
In an upper first premolar what cusp is bigger? (Buccal or palatal)
Buccal
What is the most distinctive feature in an upper first premolar?
Canine fossa.
What rule is applicable to all upper premolars?
The palatal tip is leaning mesially.
What is the mesial fissure like in an upper first premolar?
Fissure runs down and into the canine fossa.
How many roots do upper second premolars have?
1
In the upper second premolar; How do you differentiate the distal marginal ridge from the mesial marginal ridge?
Distal marginal ridge has a more deep and defined V shape.
What distinct feature does the upper second premolar lack in comparison to the upper first?
No canine fossa
In the lower first premolar; What cusp is higher?
Buccal
In the lower first premolar; What marginal ridge is a C shape?
Distal.
In the lower first premolar; The lingual tip is displaced..?
Distally.
In the lower second premolar; what is the biggest cusp?
Mesial
In the lower second premolar;Which marginal ridge is higher?
Mesial
How many roots do upper molars have? Where are these roots situated?
3 roots.
2 x buccal.
1 x palatal.
How many roots do lower molars have? Where are these roots situated?
2 roots.
1 x mesial.
1 x distal.
What shape is the upper first permanent molar?
Diamond shaped.
What tooth is the tubercle of carabelli on? What cusp is it superimposed on to?
Upper first permanent molar.
Mesial palatal cusp.
On the first permanent molar; What small cusp is clearly separated by a fissure?
Distal palatal.
What shape is the upper second permanent molar?
Triangle shaped.
What is common in the roots of an upper second permanent molar?
Closer together.
The two buccal roots can merge.
What is a characteristic of the upper second molar’s occlusal fissure?
The ‘H’ shape loses half of the distal arm.
What is unique about the lower first permanent molar?
Only molar with 5 cusps.
3 x buccal.
2 x lingual.
What root is bigger in a lower first permanent molar?
Mesial root.
In the lower first permanent molar; what cusp is the smallest buccally? (Mesial or distal)
Distal
How many cusps does a lower second permanent molar have?
4
What is common to both the lower second and first permanent molar in terms of roots?
Mesial roots are wider.
What kind of inclination do the buccal cusps have?
Lingual inclination
What molar has a buccal fissure?
Lower first permanent molar
What are the characterises of mesial and distal incisal edges of upper incisors?
Mesial angle is more sharp and the distal angle is much more rounded.
Which upper incisor has a sharper mesial incised edge?
The central incisor.
What can some new permanent incisors have?
Mammelons.
What is common to all incisors regarding the cervical edge?
Mesial cervical line is much deeper. “undulation” is greater.
What does the upper central incisor have on the palatal aspect?
A cingulum.
What does the upper lateral incisor have on the palatal aspect?
A depression/fossa created by marginal ridges.
Lower incisors are inclined in what direction?
Lingually inclined.
How does the shape of the lower central incisor compare to the lateral incisor?
Central is more symmetrical.
Lateral is fan shaped. Disto-incisal edge flares.
Name a defect of the incisors.
Peg laterals.
Name the differences between first and second upper premolars.
Upper first premolar has 2 roots. Buccal cusp is much larger than palatal cusp.
Upper second premolar has 1 root. Both cusps are of similar heights.
