In terms of skeletal development, at what age is iliac crest fusion most commonly completed in males?

The fusion of the iliac crest is an important milestone in skeletal development, particularly in males. Typically, the fusion is completed around 16 to 18 years of age. This is significant because it marks the end of major growth in height as well as maturity in the pelvis.

The correct choice reflects that, in males, the iliac crest fusion tends to be completed around 16 years of age. This is when the growth plates in the pelvic bones, including the iliac crest, undergo closure, indicating that the individual has reached a stage of skeletal maturity.

The age of 20 years and beyond is often associated with later stages of skeletal development or variations in individual development. By 24 years, the vast majority of males would have already completed this process, and fusion is typically no longer a concern. The age of 18 may be too early for the majority, as some boys may develop more slowly or reach skeletal maturity later. Thus, while there are variations in individual development, the completion point for iliac crest fusion in males is generally recognized around 16 years of age.