DBA Flashcards
How many times faster does the mandible resort than the maxilla?
4x faster
In which direction does the mandible resorb?
outwards and downwards
Approximately how far in front is the labial face of the maxillary anteriors from the incisal papilla?
8-10 mm
In which directions does the maxilla resorb?
posteriorly and upwards
Where are the palatine fovea and what do they indicate in denture design?
- 2 depressions either side of the centre line.
- lie posterior to the denture denture border
- indicate the post dam area
What is the vibrating line?
junction between the hard and soft palate
What are the hamular notches?
The underlying bone which supports nerve and muscle attachments.
denture borders should be designed to NOT put pressure on this area
What is the incisive papilla?
Oval-shaped midline surface prominence immediately behind the central incisors on the hard palate.
Covers the oral opening of the incisive canal where nasopalatine nerves are transmitted to the anterior palate
What are sulcus areas?
The maximum extension of the denture borders.
- where attached mucosa becomes mobile and unsupported.
- moved and controlled by surrounding muscles.
What is the neutral zone?
The area in the oral cavity where surrounding muscles act on the polished surfaces and borders of the seated denture.
- if the denture is designed properly, the muscle forces act to push the denture base towards the ridge, stabilising the fit of the denture.
What is the palatal gingival vestige?
The raised fibrous ridge on the palate - remanent of palatal tissues.
Where should a lower denture extend to?
Half way - 2/3rds up the retromolar pad to increase mucosal coverage and support.
What is RCP also known as and what is its significance?
Also known as Centric Relationship (CR) -
it is a reproducible and recordable position which can be repeatedly arrived at.
