This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pediatric Orthopedics, Subject name: Orthopaedics
Greenstick fracture is - 
Select and explain. 
A. Incomplete transverse fracture pattern in children, B. Complete transverse fracture pattern in children, C. Incomplete spiral fracture pattern in children, D. Complete spiral fracture pattern in children
A: Incomplete transverse fracture pattern in children
Answer: A: Incomplete transverse fracture pattern in children 
Explanation: Ans. is 'a' i.e., Incomplete transverse fracture pattern in children * A greenstick fracture is an incomplete transverse fracture pattern seen in children.* Greenstick fractures occur when an injuring force applied to a bone exceeds the limits of elasticity of the bone.* This results in the bone's bending to the point of bony disruption and fracture on the side opposite to the applied force.* However, a green-stick fracture is an incomplete fracture, in which the compressed cortex and periosteum remain intact.* Greenstick fractures of radius-ulna are common fractures in children and often result from a fall on a outstretched hands.