Dental Implants Bone Grafting & Ridge Augmentation 3

Question 1

What is the 'tent pole' effect in Guided Bone Regeneration (GBR)?

Accepted Answer

Creating and maintaining space under a membrane using rigid supports such as pins or titanium mesh

Answer

A complication where the membrane collapses into the bone defect

Answer

Using implants themselves to anchor and support the overlying membrane

Answer

The phenomenon of new bone growing through perforations in the membrane

Question 2

How is distraction osteogenesis applied in ridge augmentation for dental implants?

Accepted Answer

Surgically dividing bone and gradually separating the segments to stimulate new bone formation in the gap

Answer

Compressing bone segments together to increase density around an implant

Answer

Rapidly expanding the ridge using hydraulic pressure over 48 hours

Answer

Chemically dissolving and reconstituting bone in a controlled environment

Question 3

What is the standard activation rate used for bone distractors in vertical ridge augmentation procedures?

Accepted Answer

1 mm per day

Answer

0.5 mm per week

Answer

5 mm per week

Answer

2 mm per day

Question 4

What term describes bone graft material that is derived from human cadaveric donors and processed for clinical use?

Accepted Answer

Allograft

Answer

Xenograft

Answer

Autograft

Answer

Alloplast

Question 5

Which type of bone defect is most favorable for successful bone regeneration using GBR techniques?

Accepted Answer

Contained intrabony defects with multiple remaining bony walls

Answer

Horizontal dehiscence defects with no remaining bony walls

Answer

Large through-and-through defects spanning more than 15 mm

Answer

Infected extraction sockets with acute periapical pathology

Question 6

What does DFDBA stand for, and what is its primary property that distinguishes it from mineralized bone allograft?

Accepted Answer

Demineralized freeze-dried bone allograft; primarily osteoinductive due to exposed BMPs

Answer

Densified fresh-dried bone autograft; primarily osteogenic due to living cells

Answer

Denatured freeze-dried bone alloplast; primarily osteoconductive due to mineral matrix

Answer

Demineralized fresh-dried bone allograft; primarily osteogenic due to preserved osteoblasts

Question 7

In the context of simultaneous implant placement with bone grafting, what does 'primary stability' refer to?

Accepted Answer

The initial mechanical anchorage of the implant achieved through bone compression at the time of placement

Answer

The biological bond between the implant surface and new bone after osseointegration is complete

Answer

The stability of the GBR membrane during the bone healing period

Answer

The chemical bond between alloplast graft material and the titanium implant surface