American Board of Orthodontics (ABO) Practice Exam

Question: 1 / 660

Which of the following is NOT an etiologic factor for ankylosis of primary teeth?

Genetic predisposition

Excessive masticatory forces

Local metabolic disturbances

Regular dental hygiene practices

Regular dental hygiene practices do not contribute to the etiology of ankylosis in primary teeth. Ankylosis occurs when a tooth becomes fused to the alveolar bone, often resulting in its inability to erupt or move as expected. Factors that are typically associated with this condition include genetic predisposition, which can make certain individuals more susceptible; excessive masticatory forces, which can lead to trauma and strain on the tooth's supporting structures; and local metabolic disturbances, which can affect the health and development of the tooth.

In contrast, practicing good dental hygiene is an essential aspect of oral health that helps prevent various dental issues, but it does not play a role in causing ankylosis. Maintaining proper oral care tends to support the overall stability and health of teeth rather than causing pathological conditions like ankylosis.

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