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BDS3 PAST PAPER > MCQs > Flashcards

MCQs Flashcards

1
Q

who automatically consents for GA of a child?

A

mother

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2
Q

One large glass (250ml) of white wine (12%) contains how many units of alcohol?

A

3 units

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3
Q

All healthcare workers should be immunised against what?

A

Hep B

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4
Q

Dose reduction in intra-oral radiography is best achieved by which combination?

A

Rectangular collimation, F speed film

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5
Q

Prescribing medication for a child requires alteration from an adult prescription. The most important change to make is:

A

the dosage of the drug

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6
Q

Diabetes is a common disorder in the elderly. Which complication of this disease is most likely to lead to loss of independent living?

A

Maculopathy

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7
Q

Patients with significant oral ulceration may have an underlying anaemia. The medical problem most likely to produce this problem in a 45 year old male is:

A

Peptic ulcer disease

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8
Q

In a patient with excellent plaque control, application of an intermittent non-axial occlusal force to a tooth may give rise to?

A

Widening of the PDL and increased mobility

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9
Q

What is the retruded axis (centric relation)?

A

A dynamic relationship during which the mandible opens and closes on a reproducible hinge axis

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10
Q

In relation to shade prescription for an indirect tooth-coloured restoration the term “chroma” refers to which element of the restorations colour?

A

Intensity of colour

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11
Q

You performed an extraction 3 hours ago on a fit & healthy patient. They return to the surgery, complaining of bleeding from the extraction site. What is your preferred immediate management?

A

Get patient to bite on gauze pack

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12
Q

Under conditions of a high sugar supply, which of the following are preferably formed under anaerobic restorations?

A

Lactate

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13
Q

How can facultative anaerobes be described?

A

they grow in the presence or absence of oxygen

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14
Q

Following restoration of a single tooth under local anaesthesia, what is most appropriate to use to determine suitable occlusal contacts?

A

Thin articulating paper

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15
Q

The zygomatic process of the maxilla is partly seen as a vertical radiopaque line on a panoramic radiograph. With which bony margin of the maxillary sinus can it be confused?

A

Posterior wall/margin

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16
Q

Synthesis of extracellular polysaccharide in plaque formation is greatest when which sugar is present within the diet?

A

Sucrose

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17
Q

How can the endodontic file movement when performing “Balanced Force” technique be described?

A

90º turn clockwise followed by a 180ºturn anticlockwise

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18
Q

In RCT, what is the recommended shape for the access cavity for maxillary and mandibular premolars?

A

Oblong

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19
Q

Bilateral ankle swelling that worsens as the day progresses would suggest that the patient has what?

A

Congestive heart failure

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20
Q

Alcohol gel does not kill _________ ?

A

C. difficile

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21
Q

What colour of RINN instrument is used for bitewings?

A

Red

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22
Q

What colour of RINN instruments is used for posterior periapicals?

A

Yellow

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23
Q

What colour of RINN instruments is used for anterior periapicals?

A

Blue

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24
Q

To investigate implant failure in smokers, what would be the most appropriate type of study?

A

Cohort

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25
Q

What type of study is the best way to provide evidence of treatment?

A

randomised control trial

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26
Q

What is an examples of an IV bisphosphonate?

A

Zoledronic acid

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27
Q

What can be prescribed to treat viral, fungal and yeast infections?

A

chlorhexidine

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28
Q

what would a BPE score of 3 indicate?

A

pocketing between 3.5-5.5mm

29
Q

What is a flat anterior bite plane used for?

A

To correct an overbite

30
Q

What can be used in a calcified canal?

A

EDTA

31
Q

What etch is used in paediatric fissure sealants?

A

38% phosphoric acid

32
Q

What is the function of a buccal canine retractor?

A

moves buccally placed canine palatally

33
Q

What is deficient in haemophillia A patients?

A

coagulation factor 8

34
Q

What type of cystic fibrosis is characterised by shaky movements, altered balance and sense of positioning in space?

A

Ataxic cerebral palsy

35
Q

What would be an indication of chronic occlusal trauma to a tooth?

A

widened PDL

36
Q

What does R stand for in the acronym ARAB?

A

retention

37
Q

What is the difference between alginate and elastomer materials?

A

contact angle

38
Q

What is the reference plane for upper anterior oblique occlusals?

A

Alatragal plane

39
Q

What is a general virulence factor for all periodontal disease?

A

endotoxin

40
Q

When lying a patient back in the dental chair they begin to feel lightheaded, why is this?

A

decreased baroreceptors

41
Q

What is the angulation in panoramic radiographs?

A

80 degrees upwards

42
Q

Where is the lingual nerve positoned?

A

between medial pterygoid & mandible

43
Q

What is the greatest danger for elderly patients with osteoporosis?

A

lower vertebral fracture

44
Q

What is a function of glycocalyx in biofilms?

A

Provides a protective barrier

45
Q

The property of occlusal forces that the dentist is most able to influence through careful design of occlusal surfaces is what?

A

direction

46
Q

In the development of dentinal caries, what is one of the earliest observed events?

A

Beading of tubules

47
Q

A fast-irregular pulse in a patient who is suddenly acutely breathless would suggest what?

A

Atrial fibrillation

48
Q

What is the approximate dimension of the biological width, comprising the supra-alveolar connective tissue attachment and junctional epithelium?

A

2mm

49
Q

What is the maximum safe dose of paracetamol that a fit and healthy patient can take over a 24hr period?

A

4g (4000mg)

50
Q

In terms of medical devices, what best defines sterility?

A

An instrument is sterile if the probability that there are viable microbes on the instrument is equal to 1 in a million

51
Q

What does deamination of amino acids cause?

A

generation of the corresponding keto acids

52
Q

What is the main supplement/drug taken to the reduce the disability associated with osteoarthritis?

A

NSAIDs

53
Q

The probability of photo-electric effects occurring in radiography is proportional to:

A

atomic number

54
Q

What width of surface features can elastomers reproduce?

A

1μm (high accuracy)

55
Q

What anticoagulation drug directly inhibits thrombin production? How often is this taken per day?

A

Dabigatran
(2x a day)

56
Q

Which enzyme produces glucans?

A

Glucosyltransferases (GTFs)

57
Q

What antibiotic can cause intrinsic staining of teeth in children?

A

Tetracycline (causes dark brown or greyish-blue discolouration)

58
Q

What is a reason for using a simple hinge articulator in the construction of complete dentures?

A

As the occlusal vertical dimension can be checked

59
Q

Where should the post dam be cut for a maxillary denture?

A

On the compressible tissue at the distal of the hard palate indicated by the vibrating line

60
Q

When prescribing special trays for complete dentures what should you request? Why?

A

Edentulous trays without perforations
- enable a more secure retention for the impression material

61
Q

If the occlusal vertical dimension is reduced by 2mm, what effect might this have for complete dentures?

A

The resting face height will be decreased

62
Q

What is the ‘Neutral Zone’?

A

The space between the muscles of the lips, cheeks and tongue (forces are balanced here)

63
Q

When setting artificial teeth which cusp on the maxillary first molar occludes with the central fossa of the mandibular first molar in class I relationship?

A

Mesial-buccal

64
Q

Common sequela after cancer chemotherapy is myelosuppression, what is this characterised by?

A

anaemia and thrombocytopenia

65
Q

What is the major duct of submandibular gland?

A

Whartons Duct

66
Q

A patient is taking cyclosporin-A, what oral side effect may be present?

A

gingival hyperplasia

67
Q

In relation to complete dentures, what is a principle objective of jaw registration?

A

determining to intermaxillary relationship in the retruded contact position

68
Q

What is the brittle strength of porcelain?

A

1%

BDS3 PAST PAPER (5 decks)

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