Quiz
Complete dentures
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Questions in this quiz (29)
1True or false: rebasing a denture can lead to an increase in OVD
- ATrue
- BFalse
2During a chairside soft reline procedure, the setting reaction of the material is:
- ACondenstion
- BGelation
- CAddition
- DHydroxylation
3The aromatic ester in the liquid part of a soft chairside reline material is a...
- APlasticiser
- BPrimer
- CAdhesive
- Dcopolymer
4Long term soft liners are made of one of two materials: Silicone and Acrylic.
Silicone materials can be either [blank_start]cold[blank_end] curing or [blank_start]heat[blank_end] curing. Acrylic long term soft liners are [blank_start]heat[blank_end] cured - cold cured acrylics are only suitable for very [blank_start]short[blank_end] term linings and tissue [blank_start]conditioning[blank_end].
Cold curing silicone materials contain filler. As the level of filler rises, so does the level of [blank_start]water sorption[blank_end] and worsening of dimensional stability. The material is liable to [blank_start]tear[blank_end] and detach from the denture base. The [blank_start]abrasion[blank_end] resistance are poor.
Heat curing silicone materials have lower levels of water sorption. [blank_start]Dimensional[blank_end] stability is therefore higher and the [blank_start]adhesion[blank_end] to the denture base is better.
Long term soft acrylic linings contain either poly[blank_start]ethyl[blank_end]methacrylate or poly[blank_start]butyl[blank_end]methacrylate polymers and are heavily p[blank_start]lasticised[blank_end] to create softness.- Acold
- Bheat
- Cheat
- Dshort
- Econditioning
- Fwater sorption
- Gtear
- Habrasion
- IDimensional
- Jadhesion
- Kethyl
- Lbutyl
- Mlasticised
5Which image shows the penetration recovery curve for silicone soft liners?
- A
- B
- A
6A material that reacts almost instantly to a force, and removal of the force, is said to be:
- AThermoplastic
- BViscoelastic
- CElastic
- DPlastic
7A material that has a delayed response to the application and removal of a force is said to be:
- AThermoplastic
- BViscoelastic
- CPlastic
- DElastic
8Which material is better at absorbing shock?
- AAcrylic soft lining
- BSilicone soft lining
9True or false: acrylic soft lining materials harden and become less elastic with time
- ATrue
- BFalse
10True or false: silicone soft lining materials become harder with time due to leakage of plasticiser
- ATrue
- BFalse
11True or false: it is better to process soft lining materials and the denture base at the same time to ensure better bond strength
- ATrue
- BFalse
12True or false: there is a marked benefit in increasing the thickness of silicone soft liners to improve impact resistance
- ATrue
- BFalse
13The "ideal interdigitation of teeth in which there is no cuspal interference in any position of jaw closure" is known as...
- ACentric occlusion
- BBalanced articulation
- CBalanced occlusion
14Balanced articulation is a "...." relationship?
- AStatic
- BDynamic
- CCentric
- DAP
- ETransverse
15The curve of Spee is in the "..." direction?
- ATransverse
- BAP
- CVertical
16The "vertical distance between two arbitrary fixed points, one on the maxilla and one on the mandible, where the teeth are in occlusion" is know as the...
- AFreeway space
- BOcclusal vertical dimension
- CResting vertical dimension
- DCentric relation
17The problem with this man's dentures is likely a...
- ALack of freeway space
- BIncreased OVD
- CIncreased freeway space
18You are carrying out an intra-oral examination of a patient's denture. The patient's denture drops down when they open their mouth. What is the LEAST likely cause of this problem?
- AProblem with the polished surfaces
- BProblem with the occlusal surfaces
- CProblem with the fitting surfaces
19You attempt to move a patient's lower denture back in their mouth to check stability. The denture freely moves backwards. What is the likely cause of this problem?
- AAction of the mentalist muscle
- BOverextension
- CUnderextension
- DPosterior teeth above occlusal plane
- EPosterior teeth below occlusal plane
20Complete dentures are usually set up on what type of articulator?
- ASemi adjustable
- BSimple hinge
- CAverage value
21A face bow record facilitates mounting on what type of articulator?
- AAverage value
- BFully adjustable
- CSemi adjustable
22Antidepressants and tranquillisers can cause which of the following problems with dentures?
- AGeneralised soreness of the mucosa
- BTonacity of facial muscles
- CReduced adaptation ability
- DBone resorption
- EAcute ulceration
- FTMJ disorders
23How much of the crest height should be expected to be lost each year in an edentulous patient?
- A0.5-1mm
- B0.2-0.3mm
- C0.6-0.7mm
- D0.1-0.2mm
24How much crest height is usually lost from the alveolar ridge in the first year after extraction?
- A2-3mm
- B0.2-0.3mm
- C5-10mm
- D0.5-1mm
25True or false? surgical removal of a flabby ridge will enable a less bulky denture to be made
- ATrue
- BFalse
26True or false? a flabby ridge should be recorded with a mucostatic technique
- ATrue
- BFalse
27True or false: a flabby ridge recorded with a mucodisplacive technique will maximise support from the ridge
- ATrue
- BFalse
28True or false: a flabby ridge recorded with a mucostatic technique will result in poorer retention
- ATrue
- BFalse
29On the upper denture, which cusps are supporting cusps?
- APalatal
- BBuccal
- CBoth palatal and buccal
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- A quiz about dentures.
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- English
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