DA Compendium page 7 Flashcards
Which tooth has a unique developmental ML groove?
Mandibular 1st Premolar
What are the two varieties of the Mandibular 2nd Premolar?
a) 2-cusp: “U” or “H” occlusal groove pattern
b) 3-cusp: “Y” occlusal groove patter
Which of the varieties of the Mandibular 2nd Premolar is most common?
3-cusp –> Y occlusal groove pattern
Describe the contact areas on the Mandibular 1st Premolar
M contact area cervical to D contact area
Which teeth are the only permanent teeth where the lingual calibration measures greater than facial (i.e. the crown does not taper faciolingually)?
3-cusp mandibular 2nd premolar
Maxillary 1st Molar
Which tooth has an occlusal crown form that is said to be diamond shaped and why?
Mandibular 1st Premolar
- Because the FL - MD crown dimensions are closer than any other mandibular tooth
Which tooth has the smallest F-L crown dimension of any posterior tooth?
Mandibular 1st Premolar
Describe the distal contact areas of the Maxillary 1st molar and Maxillary 2nd molar
Maxillary 1st molar: Centered distal contact area
Maxillary 2nd molar: Centered distal contact area
T or F, All Mandibular molars have oblique ridges
False, All maxillary molars
How many cusps does the maxillary 2nd molar have?
4 primary cusps, rarely a 5th cusp
How many lobes does the 3-cusp Mandibular 2nd Premolar develop from?
5 lobes
Describe the L cusp on the mandibular 1st premolar
Small, non-functional and almost cingulum-like
Only 3 cusp Mandibular 2nd premolar has what specific features?
Central fossa
Lingual groove
Which Premolar is most likely to be congenitally missing?
3-cusp Mandibular 2nd premolar
Which cusp on the Maxillary 2nd molar is diminished in size
DL cusp size is diminished
