American Board of Orthodontics (ABO) Practice Exam

Question: 1 / 660

What is a possible result of an untreated ankylosed molar on the surrounding teeth?

Increased eruption of adjacent teeth

Arch length loss

An untreated ankylosed molar can lead to arch length loss, which is a significant consequence of the condition. When a molar is ankylosed, it becomes fused to the surrounding bone, and this fusion prevents the normal eruption of the tooth. As a result, adjacent teeth may drift or tilt toward the ankylosed tooth, reducing overall arch length. This movement can alter the position of the neighboring teeth, potentially leading to crowding or malocclusion over time.

In contrast, the other outcomes, such as increased eruption of adjacent teeth, improved occlusion, or decreased risk of cavities, are not typically associated with ankylosed molars. Ankylosis generally disrupts normal dental relationships and functions, which can contribute to various dental complications rather than positive outcomes.

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Improved occlusion

Decreased risk of cavities

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