ABP ABP Occlusion and Biomechanics 2

Question 1

Which tooth movement pattern places the greatest lateral stress on the periodontium, predisposing to angular bone defects?

Accepted Answer

Lateral/tipping forces creating tension and pressure zones

Answer

Lateral and tipping forces create alternating zones of tension and pressure within the PDL, leading to angular (infrabony) bone loss patterns when combined with inflammation.

Question 2

In the concept of 'jiggling' occlusal forces, how does this type of loading affect a periodontally compromised tooth?

Accepted Answer

Causes irreversible tooth mobility and accelerated bone loss

Answer

Jiggling forces (alternating pressures from multiple directions) on a compromised periodontium cause progressive bone resorption and increasing mobility that does not resolve without intervention.

Question 3

What is the primary purpose of occlusal splint therapy prior to definitive periodontal treatment?

Accepted Answer

Diagnose and stabilize occlusal relationships before irreversible treatment

Answer

Occlusal splints allow clinicians to diagnose centric relation discrepancies and distribute forces evenly before committing to irreversible occlusal adjustments or restorations.

Question 4

Bruxism is considered a risk factor in periodontal prognosis primarily because it does which of the following?

Accepted Answer

Increases parafunctional forces that can accelerate bone loss in inflamed tissues

Answer

Bruxism generates excessive parafunctional forces that, when superimposed on inflamed periodontal tissues, can significantly accelerate alveolar bone destruction.

Question 5

When evaluating furcation involvement radiographically, which projection provides the most accurate view of mandibular molar furcations?

Accepted Answer

CBCT cross-sectional view

Answer

CBCT provides three-dimensional visualization of furcation morphology and bone levels that cannot be accurately assessed with two-dimensional conventional radiographs.

(ABP) American Board of Periodontology Practice Test

(ABP) American Board of Periodontology Practice Test

ABP ABP Occlusion and Biomechanics 2