Occlusion for Partial Dentures Flashcards
What is occlusion?
The static relationship between the incising and masticatory surfaces of the maxillary and mandibular teeth or tooth analogues.
What is the intercuspal position?
Complete intercuspation of the opposing teeth independent of condylar position.
Is ICP fixed throughout life or can it change?
ICP can change throughout life, depending on restorations or teeth hat are extracted throughout this time.
What is the retruded contact position?
Guided occlusal relationship occurring when the condyle is in the most retruded point of the glenoid fossa.
Is RCP fixed throughout life or does it change?
Generally fixed throughout life but can change if the patient has a condylar fracture.
How do you guide someone into RCP?
Get them to relax their mandible, roll their tongue to the roof of their mouth and gently ask them to slowly close while you push on their chin.
What are index teeth?
Contacting facets of teeth in ICP.
What circumstances would you want to record the occlusion in ICP?
Enough index teeth
Stable occlusion
What circumstances would you want to record the occlusion in RCP?
Insufficient index teeth to produce a stable occlusion
What does ICP represent?
Tooth position.
What does RCP represent?
Condylar position.
Under what circumstances would you want to conform to the patients existing occlusion?
Stable occlusion with sufficient index teeth.
Under what circumstances would you want to change the occlusion?
Occlusion is unstable and there is a lack of sufficient index teeth.
Under what circumstances would you not need to record the occlusion?
If there is sufficient index teeth where the casts can be hand articulated
- may still wish to take an inter-occlusal record to increase accuracy.
What materials might you use to take an interocclusal record?
Bite registration past- polyvinylsiloxane.
Wax wafer- modelling wax.
Modified wax wafer- alminax.
