CIT Implant Materials & Techniques 2

Question 1

Which surface treatment creates a micro-rough titanium implant surface through controlled chemical etching?

Accepted Answer

Acid etching with HF/HNO3

Answer

Acid etching with hydrofluoric/nitric acid removes surface layers to create a micro-rough topography that enhances osseointegration.

Question 2

The SLA (sandblasted, large-grit, acid-etched) surface modification is primarily designed to:

Accepted Answer

Increase surface area for bone cell attachment

Answer

SLA treatment creates a micro-rough surface with increased surface area that promotes osteoblast adhesion and accelerates osseointegration.

Question 3

Hydroxyapatite (HA) coating on implants is derived from which mineral compound?

Accepted Answer

Calcium phosphate

Answer

Hydroxyapatite is a calcium phosphate ceramic that mimics the mineral component of natural bone, promoting direct bone bonding.

Question 4

What is the primary disadvantage of plasma-sprayed hydroxyapatite coatings on titanium implants?

Accepted Answer

Risk of coating delamination over time

Answer

Plasma-sprayed HA coatings can delaminate from the titanium substrate over time, potentially releasing particles and compromising long-term stability.

Question 5

Which implant macro-design feature most directly influences primary stability in low-density bone?

Accepted Answer

Thread depth and pitch

Answer

Deep threads with appropriate pitch maximize bone engagement in type III/IV bone, significantly improving primary stability during placement.

(CIT) Certified Implantology Technician Practice Test

(CIT) Certified Implantology Technician Practice Test

CIT Implant Materials & Techniques 2