Complete Dentures Flashcards
What is variation in ridge resorption classified in?
Cawood and Howell classes
5 is the worst
How do you calculate freeway space?
Vertical height-RVD-OVD = freeway space
What is Intercuspal position?
The complete incuspation of the opposing teeth independent of condylar position, sometimes referred to as the best fit of the teeth regardless of the condylar position
What is the Retruded contact position?
Guided occlusal relationship occurring at the most retruded position of the condyles in the joint cavity
Most reproducible
What is retention?
The resistance to displacement of a denture away from the ridge
What is stability?
Ability of a denture to resist displacement by functional stresses
What is adaptation?
The degree of fit between a prosthesis and supporting structures
What are some properties of denture bases?
Non toxic, non irritant
High softening temperature
Unaffected by oral fluids
High thermal conductivity
Easy and inexpensive to manufacture
When to take alginate impressions vs silicone impressions?
Light bodied silicone is mucostatic (minimum pressure is applied to the tissues to record their shape at rest)
Alginate is muco-compressive (pressure is applied to the mucosa so that the shape of the tissues under the load is recorded)
light bodied silicone- USED FOR RECORDING FLABBY RIDGE - want to avoid compression of fibrous tissue during impression
What are the support areas for the maxilla?
Primary support- hard palate
Secondary support- ridge crest
What is the primary support for the mandible?
Buccal shelf and pear shaped pad
What part of the mandible interferes during maxillary working impressions?
Coronoid Process
What is another name for master impressions?
Secondary impressions
Definitive impressions
What anatomical features help identify where posterior border should be placed in an upper denture
