2017 MSA Flashcards
What is the difference between reversible & irreversible pulpitis and how can you test for each?
REVERSIBLE PULPITIS
- inflammation and discomfort go away when you remove the aetiology/source of problem
- characterised by short sharp pain/sensitivity on application of cold stimulus which lingers for a few seconds
- does not hurt spontaneously
IRREVERSIBLE PULPITIS
- pulpal inflammation does not go away even after removal of cause, inflammation causes pulp tissue to die.
- characterised by pain on thermal stimulus, lingering pain for longer than 30s after stimulus removed
- spontaneous pain
- keeps patient awake
TESTS = sensibility testing (ethyl chloride, hot GP points), electro stimulation pulp tests
Patient has sensibility to heat & cold, lasts for a few seconds.. what is the diagnosis?
- reversible pulpitis
Patient has pain on pressure, what is the diagnosis?
Symptomatic apical periodontitis/acute apical abscess if pus present
Explain gaseous porosity:
Voids occurring in the material when PMMA is cured fast; monomer boils & this usually happens in thicker acrylic sections
Give 2 reasons why you cannot leave acrylic dentures in dry environment for too long?
- acrylic becomes brittle if overdried
- warping can occur (therefor wont fit patient correctly)
Discuss 2 thermal properties of acrylic dentures and why they are important:
- Low thermal conductivity = denture base not able to transmit heat well to palate, patient will be less sensitive to hot foods/drinks and may get scalded
- High softening temperature = allows the denture to maintain its shape/tolerate hot foods or drinks, patient should not clean dentures in boiling water
What radiograph can be taken in a highly uncooperative child for examination of carious teeth 16, 36 & 46?
OPT with deciduous dentition setting
If teeth 16, 36 and 46 need to be extracted from a childs mouth what should you do with tooth 26?
compensating extraction
What 2 thinks should you look out for on a radiograph when looking to extract a childs 6s?
- development of bifurcation of 7
- premolars and 8s present
What are 2 advantages of extracting 6s from a child (assume at the correct time)?
- carious free dentition
- 7s will experience mesial drift to close space left by 6
What are 2 disadvantages of extracting 6s from a child (assume at the correct time)?
- risks associated with GA
- negative experience of extraction can affect child at future dental appointments
If you were to do an extraction on a 3 year old child, what must occur?
- GA or inhalation sedation
- ascertain who has parental responsibility
- gain consent (explain procedure, risks, alternate treatment options)
- write referral letter for GA
A patient needs an extraction of a mandibular premolar (in an otherwise healthy dentition), what 4 common peri-operative complications can occur?
- haemorrhage
- soft tissue damage
- damage to nerve
- tooth/root fracture
A patient needs an extraction of a mandibular premolar (in an otherwise healthy dentition), what 2 types of LA needed for this extraction?
- inferior alveolar nerve (IDB)
- lingual nerve (infiltration or lingual block)
How would you test if anaesthesia has been achieved after giving a patient LA for extraction of lower premolar?
- probe around tooth and check for any presentation of pain
- ask if patients lip/chin feels numb
