Complete Dentures Course Flashcards
What is retention?
Stops something coming out
What is stability?
Keeps denture in place
What are the three main components for good retention & fourth minor component?
Border Seal
Saliva
Muscular forces
Accessory retention
What is the border seal?
This is created in the sulcus by correct boarder moulding & by a post dam.
What is a post dam?
This is a lip on the denture to create a seal on a maxillary full denture at the vibrating line (most listeria part of the hard palate).
This helps create suction.
This won’t work on the soft tissue posterior to hard palate.
What muscular forces aid denture retention?
Tongue holding denture in place.
Neutral zone for denture to sit.
How does saliva aid retention?
Cohesive and adhesive forces between denture and palate help keep denture in place.
What are is accessory retention?
Over denture,
Implants,
Fixative
What are problems with fixatives?
Contained lots of zinc and some patients experienced sink poisoning effects
What are some symptoms of zinc poisoning?
Pins and needles
Nausea
What’s a quick test for xerostomia?
Run finger inside cheaply should glide smoothly salivary deficiency if it sticks
What features can a denture be given to help stabilise it?
Remove 7s so tongue sits on it
Where should the occlusal plane be in relation to occlusal plane of dentures?
Occlusal plane lower than tongue
What are issues with the mentalis muscle and dentures?
Push lower denture backwards displacing it.
Make sure this area isn’t too large to avoid this
What is the mentalist muscle?
This is the elevator of lower lip and chin
What problems can be caused by denture instability?
Ulceration and pain Loss of denture Can’t chew Speech difficulty Mental thinks that a company these
What are the main causes of denture instability?
Premature occlusal contacts
Change in the supporting tissue
Interferences on lateral movements
What kind of guidance does complete dentures need?
Group, all teeth want to meet at the same time and be in contact on both sides in guidance
How do you check occlusion in patient?
Dentures have to be held in place when checking to ensure true occlusion is measured
What is a compensating curve?
This is used to check articulation is balanced
Teeth are placed on a curve not a flat plane
Curve of Wilson/monsoon
Which articulated would you use to make a full denture?
Average value
What is a flabby ridge?
This is very problematic it’s where the supporting bone resorbs but the ridge stays in place and is therefore very unsupportive of a denture
What is the curve of spee?
This is the curved plane that the teeth is on from a side view, this is so when the jaw protrudes the teeth still stay in contact as the condyle moves the jaw lower.
What is an immdediate denture
Denture made to fit the day of extractions
What are the types of immediate denture
Remove all teeth and provide full dentures
Remove all posteriors let heal and then remove anteriors and provide full dentures
Post immediate denture - remove all teeth and wait before making a denture (rare)
Progressively add teeth to partial denture
What do you do each visit for immediate dentures
Visit one impression and extractions Secondary impressions Visit 3Record rims and record occlusion Visit 4 try in for missing teeth Extraction and fit
What’s important about immediate denture fitting
Don’t expand bone
Check occlusion
Check it’s not uncomfortable because it will be numb
24h post extraction will be very uncomfortable
Try not to take denture out
When do you review immoderate dentures
After 1 week
When do you review after immediate denture (after one week)
3 months
& 6 months
What is a conventional flange denture
This is where a flange extend alll the way into the buccal sulcus
What is a socket fitted denture
The teeth go slightly into the socket because the lip support of a flange would look un-natural and bulky.
What is a part flange design
This is in between conventional flange and socket fitted (best of both)
What are problems with immediate dentures
Poor fit Long term discomfort Food packing under denture Bone loss Ridge damage
Where are dentures most commonly over/under extended
Under extended posteriorly
Overextended in the buccaneers sulci
