Occlusion Flashcards
Refers to the contact relationship between the maxillary and mandibular teeth
Occlusion
The position of maximum intercuspation (MIP)
Centric occlusion
What is maximum intercuspation (MIP)?
The maxillomandibular relationship that allows the most tooth contact
Centric stops are
occlusal contacts between the two arches when in Maximum Intercuspal Position (MIP)
What are 3 locations for centric stops?
• Cusp tips
• Marginal Ridges
• Central Fossae
A Jaw position - NOT a tooth position
Centric relation
What is centric relation?
The maxillomandibular position when the mandibular condyles are in the most anterior superior position in the glenoid fossa
Do the teeth occlude in CR?
The teeth may or may not occlude (touch) in CR
Dentures are often made so that____
coincide
CO & CR
Dentures are often made so that____
coincide
CO & CR
What is the vertical dimension of occlusion?
the distance between two selected anatomical points on the patient’s face with the teeth in MIP
What is angles classification of malocclusion?
A classification system used to identify malocclusion.
Angle’s Classification of Malocclusion is based primarily on
the position of the maxillary first molar’s mesiobuccal (MB) cusp tip
What is considered NORMAL Class I Occlusion?
MB Cusp of the maxillary first occludes with MB groove of mandibular first
“Normal” class I means all teeth are straight in the arches
What is considered Class I Malocclusion?
• MB Cusp of the maxillary first occludes with MB groove of mandibular first
• “Mal” because remaining teeth are not straight
What is considered a Class Il Malocclusion?
MB Cusp of the maxillary first occludes mesial to the MB groove of mandibular first
What is considered a Class II Division I?
Proclined incisors
MB Cusp of the maxillary first occludes mesial to the MB groove of mandibular first
What is considered as Class Il Division II?
MB Cusp of the maxillary first occludes mesial to the MB groove of mandibular first
Retroclined centrals
What is considered as a Class Ill Malocclusion?
MB Cusp of the maxillary first occludes Distal to the MB groove of mandibular first
The horizontal distance measured from the facial surface of the most lingual mandibular anterior tooth to the middle of the incisor edge of the more facially positioned maxillary tooth
Overjet
The horizontal distance measured from the facial surface of the most palatal maxillary anterior tooth to the middle of the incisor edge of the more facially positioned mandibular tooth
Negative overjet
The vertical overlap between two antagonistic teeth (lateral or central incisors). Measured in millimeters & often expressed as a percentage.
Overbite
What are the 4 categories of overbite?
Minimal
Moderate
Deep
Severe/ impinging
When the incisal edges of maxillary incisors are within the incisal half of mandibular incisors, the condition is referred to as
Moderate overbite
The lower jaw is forward with the mandibular arch and incisors extending beyond the maxillary arch and incisors.
Underbite
The vertical distance between teeth NOT in occlusion
Openbite
Interincisal distance at peak range of motion (ROM)
May be correctly measured by adding overbite or subtracting openbite
MMO (Maximum Mouth Opening)
Tooth Loss can cause
• Super-eruption
• Drifting
• Inclination
The anteroposterior curvature of the arches
Curve of spee
• Arc of the curve of the posterior teeth
• Concave for mandibular
• Convex for maxillary
Curve of wilson
Combining the______ forms the Occlusal Plane which refers to______
Curve of Wilson and Curve of Spee; an imaginary surface touching the edges of all occluding surfaces
____is a vertical difference between the left and right sides of the occlusal plane
Occlusal plane canting, also known as occlusal cant (OC)
