MCQs

Question 1

who automatically consents for GA of a child?

Answer 1

mother

Question 2

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

Answer 2

3 units

Question 3

All healthcare workers should be immunised against what?

Answer 3

Hep B

Question 4

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

Answer 4

Rectangular collimation, F speed film

Question 5

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

Answer 5

the dosage of the drug

Question 6

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

Answer 6

Maculopathy

Question 7

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:

Answer 7

Peptic ulcer disease

Question 8

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

Answer 8

Widening of the PDL and increased mobility

Question 9

What is the retruded axis (centric relation)?

Answer 9

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

Question 10

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

Answer 10

Intensity of colour

Question 11

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?

Answer 11

Get patient to bite on gauze pack

Question 12

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

Answer 12

Lactate

Question 13

How can facultative anaerobes be described?

Answer 13

they grow in the presence or absence of oxygen

Question 14

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

Answer 14

Thin articulating paper

Question 15

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?

Answer 15

Posterior wall/margin

Question 16

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

Answer 16

Sucrose

Question 17

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

Answer 17

90º turn clockwise followed by a 180ºturn anticlockwise

Question 18

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

Answer 18

Oblong

Question 19

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

Answer 19

Congestive heart failure

Question 20

Alcohol gel does not kill _________ ?

Answer 20

C. difficile

Question 21

What colour of RINN instrument is used for bitewings?

Answer 21

Red

Question 22

What colour of RINN instruments is used for posterior periapicals?

Answer 22

Yellow

Question 23

What colour of RINN instruments is used for anterior periapicals?

Answer 23

Blue

Question 24

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

Answer 24

Cohort

Question 25

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

Answer 25

randomised control trial

Question 26

What is an examples of an IV bisphosphonate?

Answer 26

Zoledronic acid

Question 27

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

Answer 27

chlorhexidine

Question 28

what would a BPE score of 3 indicate?

Answer 28

pocketing between 3.5-5.5mm

Question 29

What is a flat anterior bite plane used for?

Answer 29

To correct an overbite

Question 30

What can be used in a calcified canal?

Answer 30

EDTA

Question 31

What etch is used in paediatric fissure sealants?

Answer 31

38% phosphoric acid

Question 32

What is the function of a buccal canine retractor?

Answer 32

moves buccally placed canine palatally

Question 33

What is deficient in haemophillia A patients?

Answer 33

coagulation factor 8

Question 34

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

Answer 34

Ataxic cerebral palsy

Question 35

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

Answer 35

widened PDL

Question 36

What does R stand for in the acronym ARAB?

Answer 36

retention

Question 37

What is the difference between alginate and elastomer materials?

Answer 37

contact angle

Question 38

What is the reference plane for upper anterior oblique occlusals?

Answer 38

Alatragal plane

Question 39

What is a general virulence factor for all periodontal disease?

Answer 39

endotoxin

Question 40

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

Answer 40

decreased baroreceptors

Question 41

What is the angulation in panoramic radiographs?

Answer 41

80 degrees upwards

Question 42

Where is the lingual nerve positoned?

Answer 42

between medial pterygoid & mandible

Question 43

What is the greatest danger for elderly patients with osteoporosis?

Answer 43

lower vertebral fracture

Question 44

What is a function of glycocalyx in biofilms?

Answer 44

Provides a protective barrier

Question 45

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

Answer 45

direction

Question 46

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

Answer 46

Beading of tubules

Question 47

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

Answer 47

Atrial fibrillation

Question 48

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

Answer 48

2mm

Question 49

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

Answer 49

4g (4000mg)

Question 50

In terms of medical devices, what best defines sterility?

Answer 50

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

Question 51

What does deamination of amino acids cause?

Answer 51

generation of the corresponding keto acids

Question 52

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

Answer 52

NSAIDs

Question 53

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

Answer 53

atomic number

Question 54

What width of surface features can elastomers reproduce?

Answer 54

1μm (high accuracy)

Question 55

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

Answer 55

Dabigatran (2x a day)

Question 56

Which enzyme produces glucans?

Answer 56

Glucosyltransferases (GTFs)

Question 57

What antibiotic can cause intrinsic staining of teeth in children?

Answer 57

Tetracycline (causes dark brown or greyish-blue discolouration)

Question 58

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

Answer 58

As the occlusal vertical dimension can be checked

Question 59

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

Answer 59

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

Question 60

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

Answer 60

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

Question 61

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

Answer 61

The resting face height will be decreased

Question 62

What is the ‘Neutral Zone’?

Answer 62

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

Question 63

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?

Answer 63

Mesial-buccal

Question 64

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

Answer 64

anaemia and thrombocytopenia

Question 65

What is the major duct of submandibular gland?

Answer 65

Whartons Duct

Question 66

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

Answer 66

gingival hyperplasia

Question 67

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

Answer 67

determining to intermaxillary relationship in the retruded contact position

Question 68

What is the brittle strength of porcelain?

Answer 68

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