Basics Of Guidance Flashcards
In what position does chewing start and end?
ICP
Name the 2 excursive guidance patterns
Canine guidance
Group function
What is canine guidance?
Canines are in contact on working side when moving side to side
Why is canine guidance good?
Canines have a big root and makes sure posterior teeth are not in contact (pushes posterior teeth out of occlusion)
What is group function?
Groups of teeth in contact during excursion
Occlusal trauma may result in…
Pain from PDL, pain from pulp
What is locked bite?
Occlusion in which lateral movements are restricted by cusp arrangements
How may a patient describe the feeling of a locked bite?
Their teeth can’t move over one another, especially when protruding
Consequence of shallow anterior guidance?
Interference between posterior teeth
Why is it best for posterior teeth to be pushed out of occlusion?
Posterior teeth are closer to the TMJ = larger forces = high risk of restoration damage
On what 3 levels is occlusion defined?
Tooth
System
Patient level
Describe mutually protected occlusion?
Anterior guidances lifts the back teeth out of occlusion (protection)
In ICP the back teeth take the main force (protection)
How is the ideal occlusal scheme defined at the tooth level?
Firm, multiple posterior contacts
Light contacts anteriorly
No cusp incline contacts, all contacts down the long axis of the tooth
How is the ideal occlusal scheme defined at the system level?
Canine guidance
Disclusion at NWS and posteriorly
How is the ideal occlusal scheme defined at the patient level?
Within neuromuscular tolerance
