CIT Equipment Operation & Maintenance 3

Question 1

What is the critical bone temperature threshold above which thermal necrosis and implant failure risk significantly increase?

Accepted Answer

47°C

Answer

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.

Question 2

A piezoelectric surgical unit's tip shows visible chip fractures. The correct action is to:

Accepted Answer

Replace the tip immediately before next use

Answer

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.

Question 3

Which connection type between implant motor and handpiece uses a bayonet-style twist-lock mechanism?

Accepted Answer

ISO E-type connection

Answer

The ISO E-type (electric) coupling uses a bayonet-style twist-lock mechanism that allows handpiece attachment and detachment with a quarter-turn rotation.

Question 4

During sequential drilling protocol, the technician notices the third drill is not advancing smoothly and requires excessive force. The best response is to:

Accepted Answer

Remove the drill, irrigate, and inspect for wear before continuing

Answer

Excessive resistance often indicates a worn or clogged drill; removing, irrigating, and inspecting prevents thermal damage and drill breakage inside the osteotomy.

Question 5

What is the function of the anti-retraction valve in an implant motor irrigation system?

Accepted Answer

It prevents oral fluids from being aspirated back into the tubing

Answer

The anti-retraction valve prevents negative pressure from pulling potentially contaminated oral fluids back into the handpiece tubing, reducing cross-contamination risk.

(CIT) Certified Implantology Technician Practice Test

(CIT) Certified Implantology Technician Practice Test

CIT Equipment Operation & Maintenance 3