American Board of Orthodontics (ABO) Practice Exam

The correct answer indicates that approximately 9.5% of upper canines are impacted palatally. This statistic highlights the prevalence of palatally impacted canines, which is an important consideration in orthodontic diagnosis and treatment planning.

Palatal impaction of canines occurs when the canine fails to erupt into its normal position and remains trapped in the palatal bone. This condition can lead to various complications, including resorption of adjacent teeth and the need for surgical intervention to correct the impaction. The distinction that only a small percentage (around 9.5%) of upper canines are affected is significant, as it underscores the rarity of this condition compared to other types of impactions or dental anomalies.

By understanding the specific percentage of palatally impacted canines, orthodontists can better assess their patients and determine the likelihood of encountering this situation, influencing their approach to treatment strategies. Knowledge of such statistics is crucial for effective patient management and communication regarding possible treatment options.