Dynamic Occlusion Flashcards
define occlusion
the contact relationship of teeth or equivalent
define articulation
the dynamic relationship of teeth when in sliding contact (chewing -> movement)
define jaw relationship
positional relationship which the mandible bears with to the maxilla
rest/postural position
where are the teeth in the rest position?
apart
what is the clinical significance of the rest position?
it is reproducible (the same throughout life) so good landmark e.g. full dentures
how is the intercuspal position categorised?
angles classification
incisor relationship
what is the angles classification?
relationship between the MB cusp of U6 and MB groove of L6
what is a class I angles classification?
mesiobuccal cusp of U6 in line with mesiobuccal groove of L6
what angles classification is this?
class I
what is a class II angles classification?
mesiobuccal cusp of U6 anterior to mesiobuccal groove of L6
what angles classification is this?
class II
what is a class III angles classification?
mesiobuccal cusp of U6 posterior to mesiobuccal groove of L6
what angles classification is this?
class III
what is incisor relationship?
relates lower incisor tip to cingulum plateau of the upper incisor
what is a class I incisor relationship?
lower incisal edge contacts with upper cingulum plateau
what incisor relationship is this?
class I
what incisor relationship is this?
class II div I
what incisor relationship is this?
class II div II
what incisor relationship is this?
class III
what is the Occlusal vertical dimension (OVD)
The face height between 2 reference points when the teeth are in ICP (chin and nose)
Measured using Willis gauge
what is the rest/postural vertical dimension (RVD)?
The face height between 2 reference points when the teeth are in RP
understand the border movements of the mandible in the sagittal plane
understand this
