Full Dentures Flashcards
The RVD changes depending on whether you’re dentate or edentulous
True or false
False. RVD does not change.
When doing two stage extractions, you should keep the premolars for:
Maintaining stability of occlusal vertical dimension
If doing extractions in two stages, how long should be allowed between exos?
6 weeks
5 surgical risk related contra-indications for full dentures
- Radiation therapy or bisphosphonates
- Bleeding disorders
- Medically compromised patients, debilitating diseases
- Excessive surgical reduction of the alveolar processes required
- Large cysts/abscesses that need drainage after surgery
List 3 psychological contraindications for full dentures
- Diminished psychological capacity
- Poor attitude
- Unrealistic expectations
What is a possible idea when you need to take impressions but teeth are mobile:
Splint with composite - don’t etch
What are 3 advantages of beading and boxing
- Superior hardness of cast surface
- Preserves borders of impression (accurate width of sulcus)
- Minimises trimming
Why is it a good idea to draw pocket depth on casts?
Gives idea of where bone is, which helps determine shrinkage
Where should casts be trimmed in the maxilla?
Buccal and vertical
Where should casts be trimmed in the mandible?
Vertically only
What is the technique where pencil lines indicate pocket depth to help with cast trimming:
Jerbi
If you go to insert the final denture and it’s too small, what has likely happened?
The casts have been over-trimmed
When might a shorter flange be indicated?
Signiicant labial undercut
Key anatomical contributors to retention for full dentureS:
- Sulcus depth
- Tongue (sits against lingual flange)
- Masseter and buccinators retention on buccal
Why is a vaulted palate not ideal?
Limits contact area
Why are V shaped palates not ideal?
Can have undercut
5 sequelae of wearing complette dentures:
- Residual ridge resorption
- Changes in intra-oral structures
- Decreased masticatory function
- Loss of facial support and muscle tone
- Psycho-social effects
Most RRR occurs in the first months following exos
6-24 months
The maxilla resorbs 4x faster than the mandible
True or false
FALSE
Mandible 4x faster!
What is the most ideal bone type?
Type 2
3 systemic factors for RRR:
Osteoporosis, Osteomalacia, Osteopenia
People with a square jaw are less likely to have significant RRR
True or false
True
RVD - OVD =
Freeway Space
Condition with severe anterior maxillary resorption, combined with hypertrophic and atrophic changes in different quadrants of the maxilla and mandible.
Lack of support due to distance between bone and mucosa.
Combination Syndrome.
Commonly seen in patients with a completely edentulous maxilla and partially edentulous mandible with preserved anterior teeth
Which statement is false:
a) Retention is mostly associated with Physiologic comfort
b) STability is mostly associated with physiologic comfort
c) Supprt is mostly associated with longevity
d) Retention is mostly associated with psychologic comfort
a)
5 contributors to full denture retention:
- Saliva viscosity and quantity
- Border seal (peripheral seal)
- Large area of coverage by base
- Close tissue adaptation
- Neuromuscular control
Why is neuromuscular control important in lower dentures in particular?
Tongue pushes up while eating to prevent seal breaking
Tongue position affects stability and retention of complete denture. What position is better?
Anterior.
Common condition characterised by mild inflammation and redness of the oral mucosa beneath a denture. Candida is involved in 90% of cases.
Denture-related stomatitis
What Newtons Classification of denture stomatitis is this:
Localised Inflammation or pinpoint hyperemia
Type I
What Newtons classification fo Denture-related stomatitis is this?
“More diffuse erythema involving part or all of the mucosa which is covered by the denture”
Type 2
What Newtons Classification of denture related stomatitis is this:
“Inflammatory nodular/papillary hyperplasia usually on the central hard palate and ridge”
Type 3
How thick should a special tray be at the
a) periphery
b) everywhere else
a) 2-3mm
b) 1-2mm
There needs to be at least how many mm of freeway space
2mm
What are the five factors affecting occlusl balance, and which 3 can be controlled by the dentist
- Condylar inclination
- Occlusal plane inclination
- Incisal guidance
- Cuspal inclination
- Compensating curve
Last three can be controlled by dentist
In completel dentures is incisal guidance ideally maximised or minimised
Minimize incisal guidance to prevent tipping
What is the most common occlusal scheme:
bilateral balanced occlusion
In order to achieve bilateral balanced occlusion with non-anatomic teeth, what needs to be used:
Balancing ramps or manipulation of compensating curve
Do bilateral balanced teeth on full dentures have group function or canine guidance?
Neither.
5 indications for ingualised occlusion
- High aesthetic demands
- Severe mandibular ridge atrophy
- Displaceable supporting tissues
- Malocclusion
- Previous successful denture with lingualised
In lingualised occlusion, on lateral excursions there should be at least points of contact bilateral balance.
3
What is the main limitation of neutro-centric occlusion?
Similar to monoplane occlusion. Pt has to chomp, not chew.
How thick should palatal acrylic be?
2-3mm
Bilateral balance in lateral excursions is an ideal outcome with full on full dentures
True or false
true
When is clinical remount normally performed?
Delivery of denture
Which is located more anteriorly
a) Pear shaped pad
b) Retromolar pad
a) pear shaped pad. Is keratinised and attached.
Retromolar pad just distal is non-keratinized and free moving
A class I denture set up should feature vertical and horizontal overlap of mm.
1-2mm
