Quiz 5 - Occlusion Flashcards
Harmonious relationship of teeth and jaws
Ideal occlusion
Dentist reproduces when restoring an entire mouth
Ideal occlusion
Bad occlusion
Malocclusion
Can be improper alignment of teeth or size and shape of the jaws
Malocclusion
What are all of the occlusion stages called?
Angle’s classes of occlusion
What class is ideal occlusion?
Class I
What is class II & III?
Maloclussion
What are the three classes of occlusion defined by?
The relationship between the permanent first molars or the canines
-Teeth and jaws function harmoniously
-72% of population
Class I occlusion
Mesial buccal cusp on the maxillary first molar is aligned with the mesiobuccal groove of the mandibular first molar
Class I occlusion
Maxillary canine fits into the facial embrasure space between the mandibular canine and the mandibular first premolar
Class I occlusion
What facial profile is associated with class I occlusion?
Orthognathic profile
Disto-occlusion
- 22% of population
Class II malocclusion
-Skeletal type of malocclusion
-Mandible too small or maxilla too large, or both
-Mandible behind where it would be
Class II malocclusion
Mesiobuccal groove of mandibular molar is distal to the mesial buccal cusp of maxillary molar by at least the width of a premolar
Class II malocclusion
If alignment differs by less than the distance of a premolar then it is known as what?
A tendency toward class II + III
Mandible is retruded and all maxillary incisors are protruded
-Stick out
Class II division I
Mandible is retruded and one or more maxillary incisors are retruded (Tilted in)
Class II division II
Overjet
Class II division I
Overbite
Class II division II
- Mesio-occlusion
-6% of population
Class III
-Mandibular arch is anterior to the maxillary arch
-Relatively large mandible compared to maxillae
Class III
-Mandible in front of where it should be
-Anterior crossbite
Class III
Mesiobuccal groove of mandibular molar is mesial to the mesialbuccal cusp of maxillary molar by at least the width of a premolar
Class III
What facial profile is associated with Class III malocclusion?
Prognathic profile
What facial profile is associated with Class II malocclusion?
Retrognathic profile
A tooth out of alignment to the labial anterior
Labioversion
A tooth out of alignment to the labial posterior
Buccoversion
A tooth out of alignment to lingual
Linguoversion
Twisted tooth
Torsiversion
Maxillary and mandibular cusp tips line up directly over each other
End-to-end
Posterior mandibular teeth outside maxillary teeth
Crossbite
Incisal edges of maxillary and mandibular incisors meet
Edge to edge bite
Posterior teeth occlude but space between anterior incisal edges
Open bite
Overerupted tooth that is abnormally long relative to the remaining occlusal surfaces
Supraeruption or extrusion
Tooth is abnormally short relative to the occlusal plane
Infraocclusion or infraversion
