Dental Implants Implant Anatomy & Components 2

Question 1

What does 'platform switching' refer to in implant dentistry?

Accepted Answer

Using a narrower abutment diameter than the implant platform diameter

Answer

Platform switching uses an abutment with a smaller diameter than the implant platform to shift the microgap inward and preserve crestal bone.

Question 2

A Morse taper implant-abutment connection is characterized by:

Accepted Answer

A friction-fit conical connection

Answer

Morse taper connections use a conical friction-fit interface that provides strong mechanical stability and reduces micro-movement at the junction.

Question 3

What is the function of the implant cover screw?

Accepted Answer

Seals the implant during submerged healing

Answer

The cover screw closes the implant fixture during the submerged (two-stage) healing protocol to protect the internal connection.

Question 4

Which type of implant connection features a six-sided external protrusion for torque transfer?

Accepted Answer

External hex

Answer

External hex connections have a hexagonal protrusion on top of the implant that fits into the abutment to resist rotational forces.

Question 5

What is the recommended torque value range for tightening most implant abutment screws?

Accepted Answer

15–35 Ncm

Answer

Most manufacturers recommend abutment screw torque of 15–35 Ncm to ensure proper seating without stripping or fatigue fracture.

Dental Implants Practice Test