ABP Regenerative Techniques 5

Question 1

Which furcation classification system uses the terms 'F1,' 'F2,' and 'F3' with superscripts to denote both horizontal and vertical involvement?

Accepted Answer

Tarnow and Fletcher classification

Answer

Tarnow and Fletcher's system adds vertical subclassifications (A, B, C based on distance from the CEJ to the furcation roof) to horizontal classes, allowing more precise prognostication for regenerative therapy.

Question 2

When combining EMD with a bone substitute graft for an intrabony defect, the MOST important clinical rationale is to:

Accepted Answer

Use the graft as a scaffold to prevent membrane collapse

Answer

Adding a bone substitute graft to EMD provides structural support to prevent soft tissue collapse into the defect, maintaining the space necessary for regeneration in wide or complex defects.

Question 3

Systemic conditions that are ABSOLUTE contraindications to regenerative periodontal surgery include:

Accepted Answer

Patients on bisphosphonate therapy with history of MRONJ

Answer

A history of medication-related osteonecrosis of the jaw (MRONJ) associated with bisphosphonate therapy is an absolute contraindication because surgical trauma may trigger new or recurrent osteonecrosis.

Question 4

In a randomized controlled trial comparing GTR to open flap debridement (OFD), which outcome measure would provide the STRONGEST evidence of true periodontal regeneration?

Accepted Answer

Histologic evidence of new cementum, PDL, and bone on extracted teeth

Answer

Histologic evaluation of extracted teeth remains the gold standard for confirming true regeneration, as it directly demonstrates new cementum, inserting PDL fibers, and alveolar bone — outcomes not visible on X-ray or clinical probing.

Question 5

Which factor is MOST consistently associated with reduced regenerative outcomes following GTR surgery in multiple systematic reviews?

Accepted Answer

Cigarette smoking

Answer

Cigarette smoking consistently reduces regenerative outcomes in GTR surgery across multiple systematic reviews, with smokers showing significantly less bone fill and CAL gain than non-smokers.

(ABP) American Board of Periodontology Practice Test

(ABP) American Board of Periodontology Practice Test

ABP Regenerative Techniques 5