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

Delivering antibiotics to the surgical site

Answer

Stimulating osteoblast differentiation directly

Answer

Increasing blood supply to the graft material

Question 2

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

Accepted Answer

Schneiderian membrane

Answer

Inferior alveolar nerve

Answer

Greater palatine artery

Answer

Nasopalatine nerve

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

3 mm

Answer

7 mm

Answer

9 mm

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

Occlusal overload from opposing restoration

Answer

Inadequate implant surface roughness

Answer

Excess cement at the implant-abutment interface

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

Insufficient implant length for stability

Answer

Risk of orbital floor perforation

Answer

Inability to achieve immediate loading

Question 6

The biologic width around a dental implant (peri-implant supracrestal tissue attachment) differs from natural teeth primarily because:

Accepted Answer

The connective tissue fibers run parallel rather than perpendicular to the implant surface

Answer

It lacks a junctional epithelium component

Answer

It is significantly wider (≥5 mm) than around teeth

Answer

It contains Sharpey fibers embedded in the implant surface

Question 7

When evaluating a cone beam CT prior to posterior mandibular implant placement, the minimum recommended safety margin from the inferior alveolar canal is:

Accepted Answer

2.0 mm

Answer

0.5 mm

Answer

1.0 mm

Answer

3.0 mm