MCQs Flashcards
who automatically consents for GA of a child?
mother
One large glass (250ml) of white wine (12%) contains how many units of alcohol?
3 units
All healthcare workers should be immunised against what?
Hep B
Dose reduction in intra-oral radiography is best achieved by which combination?
Rectangular collimation, F speed film
Prescribing medication for a child requires alteration from an adult prescription. The most important change to make is:
the dosage of the drug
Diabetes is a common disorder in the elderly. Which complication of this disease is most likely to lead to loss of independent living?
Maculopathy
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:
Peptic ulcer disease
In a patient with excellent plaque control, application of an intermittent non-axial occlusal force to a tooth may give rise to?
Widening of the PDL and increased mobility
What is the retruded axis (centric relation)?
A dynamic relationship during which the mandible opens and closes on a reproducible hinge axis
In relation to shade prescription for an indirect tooth-coloured restoration the term “chroma” refers to which element of the restorations colour?
Intensity of colour
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?
Get patient to bite on gauze pack
Under conditions of a high sugar supply, which of the following are preferably formed under anaerobic restorations?
Lactate
How can facultative anaerobes be described?
they grow in the presence or absence of oxygen
Following restoration of a single tooth under local anaesthesia, what is most appropriate to use to determine suitable occlusal contacts?
Thin articulating paper
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?
Posterior wall/margin
Synthesis of extracellular polysaccharide in plaque formation is greatest when which sugar is present within the diet?
Sucrose
How can the endodontic file movement when performing “Balanced Force” technique be described?
90º turn clockwise followed by a 180ºturn anticlockwise
In RCT, what is the recommended shape for the access cavity for maxillary and mandibular premolars?
Oblong
Bilateral ankle swelling that worsens as the day progresses would suggest that the patient has what?
Congestive heart failure
Alcohol gel does not kill _________ ?
C. difficile
What colour of RINN instrument is used for bitewings?
Red
What colour of RINN instruments is used for posterior periapicals?
Yellow
What colour of RINN instruments is used for anterior periapicals?
Blue
To investigate implant failure in smokers, what would be the most appropriate type of study?
Cohort
What type of study is the best way to provide evidence of treatment?
randomised control trial
What is an examples of an IV bisphosphonate?
Zoledronic acid
What can be prescribed to treat viral, fungal and yeast infections?
chlorhexidine
what would a BPE score of 3 indicate?
pocketing between 3.5-5.5mm
What is a flat anterior bite plane used for?
To correct an overbite
What can be used in a calcified canal?
EDTA
What etch is used in paediatric fissure sealants?
38% phosphoric acid
What is the function of a buccal canine retractor?
moves buccally placed canine palatally
What is deficient in haemophillia A patients?
coagulation factor 8
What type of cystic fibrosis is characterised by shaky movements, altered balance and sense of positioning in space?
Ataxic cerebral palsy
What would be an indication of chronic occlusal trauma to a tooth?
widened PDL
What does R stand for in the acronym ARAB?
retention
What is the difference between alginate and elastomer materials?
contact angle
What is the reference plane for upper anterior oblique occlusals?
Alatragal plane
What is a general virulence factor for all periodontal disease?
endotoxin
When lying a patient back in the dental chair they begin to feel lightheaded, why is this?
decreased baroreceptors
What is the angulation in panoramic radiographs?
80 degrees upwards
Where is the lingual nerve positoned?
between medial pterygoid & mandible
What is the greatest danger for elderly patients with osteoporosis?
lower vertebral fracture
What is a function of glycocalyx in biofilms?
Provides a protective barrier
The property of occlusal forces that the dentist is most able to influence through careful design of occlusal surfaces is what?
direction
In the development of dentinal caries, what is one of the earliest observed events?
Beading of tubules
A fast-irregular pulse in a patient who is suddenly acutely breathless would suggest what?
Atrial fibrillation
What is the approximate dimension of the biological width, comprising the supra-alveolar connective tissue attachment and junctional epithelium?
2mm
What is the maximum safe dose of paracetamol that a fit and healthy patient can take over a 24hr period?
4g (4000mg)
In terms of medical devices, what best defines sterility?
An instrument is sterile if the probability that there are viable microbes on the instrument is equal to 1 in a million
What does deamination of amino acids cause?
generation of the corresponding keto acids
What is the main supplement/drug taken to the reduce the disability associated with osteoarthritis?
NSAIDs
The probability of photo-electric effects occurring in radiography is proportional to:
atomic number
What width of surface features can elastomers reproduce?
1μm (high accuracy)
What anticoagulation drug directly inhibits thrombin production? How often is this taken per day?
Dabigatran
(2x a day)
Which enzyme produces glucans?
Glucosyltransferases (GTFs)
What antibiotic can cause intrinsic staining of teeth in children?
Tetracycline (causes dark brown or greyish-blue discolouration)
What is a reason for using a simple hinge articulator in the construction of complete dentures?
As the occlusal vertical dimension can be checked
Where should the post dam be cut for a maxillary denture?
On the compressible tissue at the distal of the hard palate indicated by the vibrating line
When prescribing special trays for complete dentures what should you request? Why?
Edentulous trays without perforations
- enable a more secure retention for the impression material
If the occlusal vertical dimension is reduced by 2mm, what effect might this have for complete dentures?
The resting face height will be decreased
What is the ‘Neutral Zone’?
The space between the muscles of the lips, cheeks and tongue (forces are balanced here)
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?
Mesial-buccal
Common sequela after cancer chemotherapy is myelosuppression, what is this characterised by?
anaemia and thrombocytopenia
What is the major duct of submandibular gland?
Whartons Duct
A patient is taking cyclosporin-A, what oral side effect may be present?
gingival hyperplasia
In relation to complete dentures, what is a principle objective of jaw registration?
determining to intermaxillary relationship in the retruded contact position
What is the brittle strength of porcelain?
1%
