q1 Flashcards
The plane of occlusion is the plane that would be established if a line were drawn through all the buccal cusp tips and incisal edges of the mandibular teeth and then ______ into a plane to include the lingual cusp tips and continuing across the arch to include the buccal and lingual cusp tips of the opposite side.
broadened into a plane
The occlusal table represents approximately ____% of the total buccolingual dimension of the posterior tooth
Occlusal table is positioned over the _____ axis of the tooth structure.
50% to 60%
long axis
Supporting cusps aka
centric cusps, functional (Maxillary palatal and mandibular buccal cusps)
Guiding cusps aka
non-centric, guiding, shearing
When posterior ____exists, the mandibular lingual cusps occlude in the central fossae of the maxillary teeth and the maxillary buccal cusps occlude in the central fossae of the mandibular teeth.
cross bite
The Guiding Inclines(GI) of the maxillary teeth are thesurfaces responsiblefor thecharacteristics of _____.
anterior guidance.
The area that supports the major forces of mastication is?
OCCLUSAL TABLE
Mandibular MotionWhat are we looking at when the mandible moves ?
1) Teeth
2) Condylar movement
When the mandible moves BOTH the teeth and the condyles alsomove in space, obviously since they are both components of the mandible.
What are we doing to analyze mandibular movement ?
We are tracing or recording these movements (tooth and condylar movements) from 3 spatial planes (Sagittal, Frontal & Horizontal)
Five Factors of Mandibular Movement
1)Initiating position (Centric Relation)2)Types of Motiona)Rotationb)Translation3)Direction of Motion (Planes)4)Degree of Movement5)Clinical Significance of Movements
Condylar position is most anterior when
mandible is at maximum opening
Border movements ALWAYS start in _____ in ALL planes
Border movements ALWAYS start in CR in ALL planes
Functional border ALWAYS starts in ____
Functional border ALWAYS starts in MIP (ICP )
It is tear shaped
Left lateral superiorborder starts at __
Left lateral superiorborder starts at CR