Which statement best describes the clavicle aging method?

• A. It uses only the first epiphysis to fuse
• B. It is not used in age estimation
• C. It relies on the timing of the last epiphysis fusion, with younger showing no fusion and older showing complete fusion, and looks for absence of flakes or fusion lines
• D. It is based on rib end morphology

Answer: (C)

Clavicle aging is about when the clavicle’s growth ends, which is tied to the fusion of its epiphyses. The last epiphysis to fuse serves as the best marker for age, because before fusion the bone shows growth plates or fusion lines, while after complete fusion there are no fusion lines or fragments remaining. In practice, you assess whether the medial or lateral clavicle epiphysis has fused; if fusion lines or unfused areas are still visible, the individual is younger, whereas complete fusion with no lines indicates an older age. This is why the statement that it relies on the timing of the last epiphysis fusion and looks for absence of flakes or fusion lines best captures the method. It is an age-estimation approach that is not based on rib end morphology.