ABO ABO Periodontics and Interdisciplinary Treatment 2

Question 1

An orthodontic patient develops localized gingival enlargement (fibrous hyperplasia) around brackets. The FIRST step in management is:

Accepted Answer

Improved oral hygiene instruction and professional plaque removal

Answer

Plaque-induced gingival hyperplasia during orthodontic treatment is reversible with proper oral hygiene; improved hygiene should be the first intervention.

Question 2

Root resorption during orthodontic treatment is most commonly detected using:

Accepted Answer

Periapical radiographs or CBCT

Answer

Periapical radiographs reveal root length changes due to resorption, and CBCT provides three-dimensional detail of root morphology and resorption extent.

Question 3

Which orthodontic tooth movement has the highest risk of root resorption?

Accepted Answer

Upper incisor intrusion and torque

Answer

Upper incisor intrusion combined with palatal root torque applies prolonged apical forces that are strongly associated with external root resorption.

Question 4

Gingivectomy prior to orthodontic treatment may be indicated for a patient with:

Accepted Answer

Gingival enlargement causing pseudopocket formation that impairs bracket placement

Answer

Enlarged gingival tissue can cover the clinical crown and interfere with bracket positioning, making pre-orthodontic gingivectomy beneficial.

Question 5

When planning orthodontic treatment for a patient with missing teeth, the orthodontist must consider the restorative space requirements because:

Accepted Answer

Final space distribution determines restorative options (implant, bridge, or closure)

Answer

The amount and location of space created or maintained orthodontically must meet the biometric requirements for the planned restoration type.

American Board of Orthodontics (ABO) Practice Test

American Board of Orthodontics (ABO) Practice Test

ABO ABO Periodontics and Interdisciplinary Treatment 2