Which type of fracture occurs when the bone breaks straight across its long axis?

A spiral fracture occurs due to twisting or rotational forces on the bone, resulting in a twisting break along the bone's length.

a. Greenstick fracture: A greenstick fracture involves the bone bending and partially breaking, usually seen in children. It is not caused by twisting forces.
b. Transverse fracture: A transverse fracture occurs when the bone breaks straight across its long axis, not due to twisting.
d. Comminuted fracture: In a comminuted fracture, the bone breaks into multiple pieces, which is not associated with twisting forces.

A comminuted fracture occurs when the bone is crushed and shattered into multiple fragments, resulting in significant bone displacement and increased difficulty in alignment during the healing process.

a. Greenstick fracture: A greenstick fracture is an incomplete fracture where the bone bends and partially breaks, commonly seen in pediatric patients. It does not involve bone crushing or fragmentation.
c. Avulsion fracture: An avulsion fracture occurs when a small fragment of bone is pulled away from the main bone due to the forceful attachment of a tendon or ligament. It is not characterized by bone crushing or fragmentation.
d. Stress fracture: A stress fracture is a tiny crack in the bone caused by repetitive stress and overuse. It does not involve bone crushing or fragmentation.