American Board of Orthodontics (ABO) Practice Exam

Question: 1 / 660

The term 'SMI' in the context of growth stages refers to what process?

Synergistic mandible integration

Sequential maxillary intervention

Skeletal maturity index

The term 'SMI' refers to the Skeletal Maturity Index, which is a critical concept in orthodontics. This index is used to evaluate the maturation of skeletal structures during growth stages, particularly in adolescents. The skeletal maturity index helps orthodontists in assessing the optimal timing for treatment, as it provides insight into the skeletal development of a patient. By understanding a patient's skeletal maturity, practitioners can make informed decisions regarding the timing of interventions, such as the application of braces or other orthodontic devices.

In the context of orthodontics, knowing a patient's SMI can indicate whether they are in a growth spurt or nearing the end of their growth period. This is vital because it influences the effectiveness and duration of treatment. The skeletal maturity index is often assessed using hand-wrist radiographs and correlating the maturation of specific bones with levels of skeletal development. This correlation aids in predicting remaining growth potential and potential changes in the dental and skeletal relationships over time.

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Standard medial imaging

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