CIT CIT Prosthetic Components & Restoration 5

Question 1

Which material is most commonly used for provisional implant-supported restorations due to its ease of modification and repairability?

Accepted Answer

PMMA (polymethylmethacrylate)

Answer

PMMA is the preferred provisional material because it can be easily added to, trimmed, and polished chairside, allowing iterative refinement of tissue contours and occlusion.

Question 2

In implant prosthodontics, what term describes the misfit at the implant-abutment interface that can lead to microleakage and bone loss?

Accepted Answer

Microgap

Answer

A microgap at the implant-abutment interface allows bacterial colonization and micromovement, contributing to marginal bone loss and peri-implantitis.

Question 3

A screw-access channel in a screw-retained crown is typically sealed with which material after torquing the prosthetic screw?

Accepted Answer

PTFE (Teflon) tape followed by composite resin

Answer

PTFE tape is placed over the screw head to protect it, and then composite resin seals the access channel, allowing future retrievability by removing the composite.

Question 4

Which occlusal scheme is generally recommended for implant-supported full-arch fixed prostheses to minimize lateral forces on implants?

Accepted Answer

Bilateral balanced occlusion

Answer

Bilateral balanced occlusion distributes lateral forces evenly across all implants during excursive movements, reducing the risk of overloading individual implants or components.

Question 5

What is the function of an anti-rotation feature on an implant abutment connection?

Accepted Answer

To prevent the abutment from rotating independently of the implant body

Answer

Anti-rotation features such as hex, octagon, or spline connections physically lock the abutment to the implant to prevent rotational movement, which is essential for single-unit restorations.

(CIT) Certified Implantology Technician Practice Test

(CIT) Certified Implantology Technician Practice Test

CIT CIT Prosthetic Components & Restoration 5