Final answer:
Greenstick fractures are more common in younger patients because their bones are more flexible and less mineralized.
Step-by-step explanation:
The type of fracture that is more common in younger patients than in older patients is the greenstick fracture. This kind of fracture occurs when a bone bends and cracks, instead of breaking completely into separate pieces. Younger individuals, particularly children, are more susceptible to greenstick fractures due to the increased flexibility and lower mineral density of their bones. Unlike older patients, whose bones are more likely to suffer from complete breaks such as transverse or comminuted fractures due to brittleness associated with aging.