Dental Implants Bone Grafting & Ridge Augmentation 2

Question 1

Which term describes the property of a graft material that provides a scaffold along which host bone cells can migrate and form new bone?

Accepted Answer

Osteoconduction

Answer

Osteoconduction refers to the scaffold property of graft material that provides a physical framework for host osteoblasts and vascular tissue to migrate into and form new bone along its surface.

Question 2

Which process best describes osteoinduction in bone grafting?

Accepted Answer

Stimulation of undifferentiated mesenchymal cells to become bone-forming cells

Answer

Osteoinduction is the process by which signaling molecules (particularly BMPs) stimulate undifferentiated mesenchymal stem cells to differentiate into osteoblasts, initiating de novo bone formation in non-osseous tissue.

Question 3

Which growth factor, found in demineralized bone matrix, plays the most critical role in bone regeneration by stimulating osteoblast differentiation?

Accepted Answer

Bone morphogenetic protein (BMP)

Answer

Bone morphogenetic proteins (BMPs), particularly BMP-2 and BMP-7, are the most potent osteoinductive signals; they are exposed during demineralization of bone matrix and are FDA-approved as recombinant proteins for bone regeneration.

Question 4

What is the primary goal of socket preservation (ridge preservation) performed immediately after tooth extraction?

Accepted Answer

To minimize alveolar bone resorption following extraction

Answer

Socket preservation using bone graft material placed immediately after extraction significantly reduces the natural dimensional changes (up to 50% width reduction) that occur in the alveolar ridge during the first 3-6 months post-extraction.

Question 5

Which type of GBR membrane requires a planned second surgical procedure for removal?

Accepted Answer

Expanded polytetrafluoroethylene (e-PTFE) membrane

Answer

Non-resorbable e-PTFE (Gore-Tex) membranes provide superior space maintenance but must be surgically retrieved in a second procedure; collagen, polylactic acid, and polyglycolic acid membranes are all bioresorbable and degrade without additional surgery.

Dental Implants Practice Test

Dental Implants Practice Test

Dental Implants Bone Grafting & Ridge Augmentation 2