Miscellaneous

Question 1

Describe how to perform Handpiece safety checks

6 mins

Answer 1

Inspection

1. Ensure back cap cannot rotate (grip and turn anticlockwise)
2. Pull the bur to ensure fully engaged (insert bur, secure, pull)

Safe to use
1. Fit handpiece to coupling and apply tension to ensure secure

Fit for use

1. Check bur spins freely (rotation - spin/roll along fingers)
2. Check lateral movement (push side-to-side ensuring no excessive movement
3. Check sound produced is consistent (run for 5-10s - listen for normal sound)

Question 2

Describe the differences between types of sterilisers and their tests

6 mins

Answer 2

Type N - non-vacuum, passive air removal. For unwrapped solid instruments

Type B - vacuum, active air removal. For packaged/wrapped instruments including hollow, lumped and porous.

Cycles - air removal, sterilising, drying, cooling

Tests
Daily - steam penetration. Chemical test strip (type N), Helix/Bowie Dick (type B). Wipe clean, change water and perform ACT daily.
Weekly - cleaning efficacy. Protein test strip (type N), vacuum leak and air detector function test (type B).
Quarterly/annually - engineer (validation tests)

Parameters - 134-137C, 2-2.3 bar, min 3 mins.

Sterilised - visible clean, package colour change (brown to blue), Helix/Bowie Dick colour change (yellow to blue). In unsure, re-process starting from WD/manual cleaning

Question 3

Discuss LA doses, side effects, how to ensure anaesthesia and assembly

6 mins

Answer 3

2% lido ± 80k adr - 4.4mg/kg
4% art ± 1:100k adr - 7mg/kg
3% pril ± 0.54mcg fell - 8mg/kg

Assembly - check BN and EXP. Gold/silver ring towards needle end. Twist in, unsheathe, resheathe one click

Check - ask, probe gingiva, tap tooth. Should feel numb/pins and needles/swollen

Side effects - allergy/anaphylaxis, seizure, cardiac arrest, nausea, vomiting, dizzy, headache, blurred vision, twitchy muscles, nerve damage, prolonged numb/weak/tingling (temp/permanent), haematoma, increased HR