Dental Anatomy Flashcards
The mucogingival junction separates…
attached gingiva from alveolar mucosa
Sharpey’s Fibers
a continuation of the PDL into cementum and bone (much thicker on the bone side)
The free gingival groove separates…
free gingiva from attached gingiva
What is the PDL derived from?
The dental sac
The prime mover in a working side movement is…
the contralateral lateral pterygoid
The main movers in protrusive movement are….
both lateral pterygoids (unassisted!)
Which movements do the lateral pterygoids perform?
Opening the mouth/depressing the mandible (also uses anterior belly of the digastric and omohyoids)
Protruding the mandible
Opening the mouth/depressing the mandible requires the use of which muscles?
lateral pterygoinds
anterior belly of the digastric
omohyoids
List the 4 dental factors which promote health of the PDL by resisting occlusal force
- anterior teeth with slight or no contact in CR
- an occlusal table that makes up less than 60% of the overall FL width
- an occlusal table at right angles to the long axis of the tooth
- crowns of mandibular molars with 15-20% incine lingally and roots facially
Where are gingival fibers located?
in the free gingiva only
Where are pits located?
At the junction or terminals of developmental grooves
Where are transverse ridges most common?
maxillary premolars and mandibular molars
Where are oblique ridges found? What cusps do they connect?
maxillary molars ML cusp (distal ridge) and DB cusp (triangular ridge)
What are 3 characteristics common to all mandibular teeth?
- indistinct cingula, no grooves or pits
- incisal edges are lingual to the root axis line
- continuous convexity incisoapically on the facial surface
Is alveolar bone thinner on the facial or lingual of central incisors (maxillary and mandibular?
facial
What shape is the mesial/distal aspect of all maxillary posterior teeth?
trapezoidal
what shape is the mesial/distal aspect of all mandibular posterior teeth?
rhomboidal
what is the shape of the mesial/distal aspect of all anterior teeth?
triangle
What is the shape of all incisors (maxillary and mandibular) from the buccal/lingual?
trapezoid
What is the shape of all posterior teeth (maxillary and mandibular) from the buccal/lingual?
trapezoidal
Name 3 teeth with a centered cingulum
maxillary lateral
maxillary canine
mandibular central
Name 3 teeth with a cingulum located off center toward the distal
maxillary central
mandibular lateral
mandibular canine
Which cusp ridge is longest on the permanent canines?
distal cusp ridge
Where is the HOC on lingual of all maxilary and mandibular posteriors?
middle third
