ABP Surgical Procedures 4

Question 1

Platelet-rich fibrin (PRF) used as a surgical adjunct in periodontal procedures is prepared by centrifuging blood at approximately:

Accepted Answer

2700 rpm for 12 minutes

Answer

PRF is typically prepared by centrifuging whole blood at approximately 2700 rpm for 12 minutes, which concentrates platelets and growth factors in a fibrin matrix without anticoagulants.

Question 2

In a coronally advanced flap (CAF) for root coverage, vertical releasing incisions should be placed:

Accepted Answer

At least one tooth away from the recession defect

Answer

Vertical releasing incisions placed at least one tooth distal to the recession ensure adequate blood supply to the flap and avoid tension at the coronal margin.

Question 3

The 'biologic width' violation most frequently results in which clinical complication?

Accepted Answer

Alveolar bone loss and chronic gingival inflammation

Answer

Encroachment on the biologic width leads to alveolar bone resorption and persistent gingival inflammation as the periodontium attempts to re-establish its biologic dimension.

Question 4

During an apically positioned flap combined with osseous surgery, the flap is positioned at which level relative to the alveolar crest?

Accepted Answer

1–2 mm apical to the crest

Answer

Positioning the flap 1–2 mm apical to the alveolar crest after osseous surgery allows the tissue to heal at the level of the bone, reducing pocket depth.

Question 5

Which classification describes a furcation invasion where a probe can enter the furcation but does not pass through to the other side?

Accepted Answer

Class II

Answer

Hamp's Class II furcation involvement indicates horizontal loss of periodontal support exceeding one-third of the tooth width but without through-and-through penetration.

(ABP) American Board of Periodontology Practice Test

(ABP) American Board of Periodontology Practice Test

ABP Surgical Procedures 4