Equipment Operation & Maintenance Flashcards
7 cards from real CIT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Equipment Operation & Maintenance flashcards as text
What is the critical bone temperature threshold above which thermal necrosis and implant failure risk significantly increase?
Answer: 47°C
Research by Eriksson and Albrektsson established 47°C as the critical threshold; sustained heat above this level for more than one minute causes irreversible bone cell death.
A piezoelectric surgical unit's tip shows visible chip fractures. The correct action is to:
Answer: Replace the tip immediately before next use
A fractured piezo tip must be replaced immediately because the fragment can become a foreign body in the surgical site and tip efficiency is severely compromised.
Which connection type between implant motor and handpiece uses a bayonet-style twist-lock mechanism?
Answer: ISO E-type connection
The ISO E-type (electric) coupling uses a bayonet-style twist-lock mechanism that allows handpiece attachment and detachment with a quarter-turn rotation.
During sequential drilling protocol, the technician notices the third drill is not advancing smoothly and requires excessive force. The best response is to:
Answer: Remove the drill, irrigate, and inspect for wear before continuing
Excessive resistance often indicates a worn or clogged drill; removing, irrigating, and inspecting prevents thermal damage and drill breakage inside the osteotomy.
What is the function of the anti-retraction valve in an implant motor irrigation system?
Answer: It prevents oral fluids from being aspirated back into the tubing
The anti-retraction valve prevents negative pressure from pulling potentially contaminated oral fluids back into the handpiece tubing, reducing cross-contamination risk.
How should an implant technician verify that a surgical handpiece is functioning at its calibrated speed before a procedure?
Answer: Use a tachometer or optical RPM sensor to measure actual output speed
A calibrated tachometer or optical RPM sensor provides an objective, measurable confirmation that the handpiece delivers the speed indicated by the motor's control unit.
Which component of an implant surgical unit is most susceptible to damage from high-level disinfectant chemical immersion?
Answer: Handpiece cord/cable assembly
Handpiece cord assemblies contain electrical wiring and polymeric insulators that degrade when immersed in harsh chemical disinfectants, which are contraindicated for these components.