American Board of Orthodontics (ABO) Practice Exam 2025 - Free Orthodontics Practice Questions and Study Guide

The correct choice indicates that approximately 33% of asymptomatic patients will exhibit disk displacement. This statistic draws from clinical studies examining the prevalence of temporomandibular joint (TMJ) disorders, particularly focusing on disk displacements in individuals who do not report symptoms.

Disk displacement occurs when the articular disc within the TMJ is positioned abnormally, which can happen without leading to noticeable discomfort or dysfunction in some patients. The finding that about one-third of asymptomatic patients present with this condition suggests that there is a significant occurrence of disk abnormalities that may not necessarily correlate with clinical symptoms. This highlights the importance of thorough diagnostic evaluations in orthodontic practice, as individuals may have underlying TMJ issues that are not immediately apparent through patient-reported symptoms.

Other percentages, while they may be reflective of other studies or specific populations, do not accurately capture this particular statistic regarding asymptomatic individuals. Understanding this prevalence is crucial for orthodontists as it aids in comprehensive assessments and management plans for their patients, ensuring optimal outcomes in orthodontic treatment and related dental care.