Dental Implants Osseointegration & Healing 2

Question 1

The 'stability dip' phenomenon during implant healing occurs because:

Accepted Answer

Primary stability decreases before secondary stability fully develops during remodeling

Answer

During early healing, bone remodeling reduces the initial mechanical grip (primary stability) before new bone formation (secondary stability) compensates — creating a temporary dip.

Question 2

Growth factors contained in platelet-rich fibrin (PRF) that enhance implant site healing include:

Accepted Answer

PDGF, TGF-beta, and VEGF

Answer

PRF releases platelet-derived growth factor (PDGF), transforming growth factor-beta (TGF-β), and vascular endothelial growth factor (VEGF) to accelerate healing and angiogenesis.

Question 3

Fibro-osseous integration (as opposed to osseointegration) is considered a failure because:

Accepted Answer

A fibrous tissue layer at the interface lacks mechanical stability and is prone to breakdown

Answer

Fibrous encapsulation creates a weak, mobile interface similar to a non-union fracture — the implant may feel firm initially but typically fails under functional loading.

Question 4

The peri-implant blood clot formed immediately after implant placement serves as:

Accepted Answer

A scaffold for cellular migration and initiating the healing cascade

Answer

The fibrin clot matrix provides a provisional scaffold for cell migration including osteoblasts, fibroblasts, and endothelial cells that initiate tissue regeneration.

Question 5

Which systemic condition most severely impairs osseointegration by reducing osteoblast function?

Accepted Answer

Osteoporosis

Answer

Osteoporosis reduces bone density and osteoblast activity, potentially compromising bone-to-implant contact and increasing fracture risk around implants.

Dental Implants Practice Test

Dental Implants Practice Test

Dental Implants Osseointegration & Healing 2