OCCLUSION Flashcards
Which tooth has the greatest inclination
facially (faciolingual tilt)?
Maxillary Central incisors
followed by max. lats and then mand. incisors
Which teeth have the least tilt of all teeth and are called the straightest in the mouth?
Premolars
All teeth tilt facially, thus their roots are lingual EXCEPT
mand. 2nd premolars and molars
All teeth tilt mesially EXCEPT
max. central incisors and the mand. central and lateral incisors
Which tooth has the greatest mesial tilt?
Maxillary canines
Mandibular posterior roots are inclined ________ thus crowns inclined _______
Facially, lingually
Maxillary posterior roots are inclined ________ thus crowns inclined _______
Lingually, facially
Supporting/holding cusps of posterior teeth
MAXILLARY LINGUAL (UL) MANDIBULAR BUCCAL (BL)
What do supporting/holding cusps occlude with?
They contact fossa or marginal ridges of the opposing arch
Guiding cusps of posterior teeth
- a. Buccal of the upper (BU)
- b. Lingual of the lower (LL)
- c. Together BU+LL=BULL (a way to remember this)
What do guiding (non functional) cusps occlude with?
Lie in embrasures or grooves of the opposing arch
ML cusps of all max. molars occlude with…
CENTRAL FOSSA OF OPPOSING TOOTH
DB cusp of mand. 1st molar occludes in…
central fossa of max. 1st molar
D cusp of mand. 1st molar occludes in…
distal triangular fossa of max. 1st molar
DB cusp of mand. 2nd molar occludes in…
central fossa of max. 2nd molar
Where does the lingual cusp of a 1st max. premolar contact?
the distal marginal ridge (DMR) of the mand. 1st
premolar and the mesial marginal ridge (MMR) of the mand 2nd premolar
Where does the lingual cusp of a 2nd max. premolar contact?
the DMR of the mand 2nd mand. Premolar and
the MMR of mand. 1st molar.
Where does the DL cusp of a 1st max. molar contact?
DMR of the mand. 1st molar. and the MMR of the
mand. 2nd molar