Occlusion Flashcards
What class of levers is the fulcrum between the effort and the load?
Class 1
What class of levers is the load between the effort and the fulcrum?
Class 2
In what class of levers is the effort between the fulcrum and the load?
Class 3
Every maxillary tooth is more … than its opposing counterpart.
distal
What is the only maxillary tooth with 1 opposing counterpart?
maxillary 3rd molar
What is the only mandibular tooth with 1 opposing counterpart?
mandibular central incisor
A tooth-determined jaw position; you can slide your teeth forward and backward from this position.
centric occlusion: the intercuspal position
In the Angle Class 1 (ideal) each maxillary tooth is in a more distal position to its antagonist in the mandibular arch. The mesiobuccal cusp of the maxillary 1st molar should rest on the …
mesiobuccal groove of the mandibular 1st molar
Maxillary 1st molar is anterior to the mesiobuccal groove of the mandibular 1st molar; the mesiobuccal cusp rests between the 1st mandibular molar and 2nd premolar
Angle Class II (Overbite; retruded)
Most common malocclusion in individuals with Obstructive sleep apnea (OSA)
Angle Class II (overbite; retruded)
Overbite with upper anterior teeth flaring out
Class II, Division 1
Overbite with central incisors slanting inward, and adjacent lateral incisors slanting out
Class II, Division 2
The mandibular anterior teeth are more prominent than the maxillary anterior teeth. The pt often has a large mandible or a short maxilla.
Class III (prognathic)
In Class III occlusion usually the mesiobuccal cusps of the maxillary 1st molar rests between …
the 1st and 2nd mandibular molars
Mandibular buccal cusps are buccal to the maxillary buccal cusps
Crossbite
a.k.a. protrusion of teeth
Overjet
Horizontal distance between the lingual maxillary and buccal mandibular incisors
Overjet
Where does the lingual cusp of maxillary 1st premolars hit?
distal fossa of the mandibular 1st premolar
Where does the lingual cusp of maxillary 2nd premolar hit?
Distal fossa of the mandibular 2nd premolar
Where does the mesiolingual cusp of maxillary 1st molar hit?
Central fossa of the 1st molar
Where does the distolingual cusp of maxillary 1st molar hit?
distal marginal ridge of the 1st molar and the mesial marginal ridge of the 2nd molar
Where does the mesiolingual cusp of maxillary 2nd molar hit?
Central fossa of the 2nd molar
Where does the distolingual cusp of maxillary 2nd molar hit?
distal marginal ridge of the 2nd molar
Where does the mandibular buccal cusp of the 1st premolar hit the maxilla?
Mesial marginal ridge of the 1st premolar
Where does the mandibular buccal cusp of the 2nd premolar hit the maxilla?
distal marginal ridge of the 1st premolar and mesial marginal ridge of the 2nd premolar
Where does the mandibular mesiobuccal cusp of the 1st molar hit the maxilla?
distal marginal ridge of the 2nd premolar and the mesial marginal ridge of the 1st molar
Where does the mandibular distobuccal cusp of the 1st molar hit the maxilla?
Central fossa of the 1st molar
Where does the mandibular distal cusp of the 1st molar hit the maxilla?
usually nonfunctional
Where does the mandibular mesiobuccal cusp of the 2nd molar hit the maxilla?
distal marginal ridge of the 1st molar and mesial marginal ridge of the 2nd molar
Where does the mandibular distobuccal cusp of the 2nd molar hit the maxilla?
central fossa of the 2nd molar
the side of the mandible that moves toward the median line
non-working (mediotrusive, balancing) side
The side toward which the mandible moves
working (laterotrusive) side
moving the mandible backwards in an anterior-posterior plane
retrusion
In the working movement, the side to which the mandible moves the condyle has almost a … movement.
straight lateral (pivoting)
In the non-working movement, the side that moves toward the median line, more diagonal movement, the condyle is moving …
medial, anterior, and down
