CDT Implant Prosthetics Techniques 2

Question 1

Which implant connection type uses a conical interface to create a friction-locked, cold-welded seal between the implant and abutment?

Accepted Answer

Internal conical (Morse taper)

Answer

Internal conical (Morse taper) connections rely on a tapered, friction-fit interface that creates a cold-weld effect, reducing micromovement and microgap.

Question 2

When fabricating a screw-retained implant crown, the screw access channel is typically sealed with which material after final torquing?

Accepted Answer

Composite resin over PTFE tape

Answer

PTFE (Teflon) tape is placed over the screw head followed by composite resin to allow future access while sealing the channel.

Question 3

A patient presents with a failing implant restoration where the screw repeatedly loosens. Which design modification would BEST address this?

Accepted Answer

Use an abutment with anti-rotational features and higher torque specification

Answer

Anti-rotational abutment features combined with proper torque values prevent screw loosening by distributing occlusal forces more effectively.

Question 4

In implant prosthetics, what is the primary purpose of a 'healing abutment' (also called a healing cap or cover screw)?

Accepted Answer

To shape the peri-implant soft tissue during osseointegration

Answer

Healing abutments contour the gingival tissue to create the desired emergence profile before the final abutment is placed.

Question 5

Which occlusal scheme is most commonly recommended for implant-supported fixed restorations to minimize lateral forces on the implants?

Accepted Answer

Canine-guided occlusion

Answer

Canine-guided occlusion discludes posterior teeth during lateral excursions, reducing harmful lateral forces transmitted to implants.

(CDT) Certified Dental Technicians Practice Test

(CDT) Certified Dental Technicians Practice Test

CDT Implant Prosthetics Techniques 2