In head-on car crashes if the occupants are wearing seatbelts, the clavicle bone is usually broken.
More about clavicle bone:
The clavicle, often known as the collarbone, is the curving anterior bone of the vertebrate shoulder girdle that serves as a strut to support the shoulder. The clavicle frequently fractures, especially in the middle of the bone; a fall or other incident that causes a horizontal force on the shoulder is a common cause. One of the primary bones in the shoulder, the collarbone, can break and suffer from a clavicle fracture.
About 5% of all adult fractures are of this type, making it a reasonably common fracture. The majority of clavicle fractures happen when the bone is sufficiently compressed either by a fall onto the shoulder or an outstretched arm to snap or break. With a broken collarbone, your arm may be difficult to move and may be quite painful.
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