ABP Implant Dentistry 3

Question 1

Guided bone regeneration (GBR) membranes function primarily by:

Accepted Answer

Excluding non-osteogenic cells from the healing space

Answer

GBR membranes act as physical barriers that exclude rapidly proliferating epithelial and connective tissue cells, allowing osteogenic cells to repopulate the defect.

Question 2

Which anatomical structure is most at risk during sinus floor elevation via the lateral window approach?

Accepted Answer

Schneiderian membrane

Answer

The Schneiderian membrane (sinus mucosa) is the primary structure at risk during lateral sinus augmentation; perforation significantly increases complication rates.

Question 3

According to the ITI consensus, a residual bone height of at least how many millimeters allows implant placement simultaneously with osteotome sinus floor elevation?

Accepted Answer

5 mm

Answer

The ITI recommends a minimum residual bone height of 5 mm to achieve adequate primary stability when performing simultaneous implant placement with the osteotome technique.

Question 4

A patient develops retrograde peri-implantitis 3 months after implant placement. The most likely etiology is:

Accepted Answer

Pre-existing periapical pathology on an adjacent tooth

Answer

Retrograde peri-implantitis most commonly results from contamination by periapical pathogens from a pre-existing lesion on an adjacent tooth migrating to the implant apex.

Question 5

Which of the following is the primary disadvantage of using zygomatic implants in severely atrophic maxillae?

Accepted Answer

High rate of sinus membrane perforation and sinusitis

Answer

Zygomatic implants traverse the maxillary sinus and are associated with a meaningful risk of chronic sinusitis due to sinus membrane disruption.

(ABP) American Board of Periodontology Practice Test

(ABP) American Board of Periodontology Practice Test

ABP Implant Dentistry 3