A 35-year-old suffers a broken clavicle following a motor vehicle accident. X-ray reveals that the bone surfaces in the joint partially lost contact with each other. This condition is called:
a. dislocation.
b. subluxation.
c. distortion.
d. nonunion.
ANS: B
Subluxation occurs when contact between the opposing joint surfaces of a fracture are partially lost. Dislocation is the displacement of one or more bones in a joint in which the opposing joint surfaces lose contact entirely. Distortion is not a term applicable to fracture healing. Nonunion is failure of the bone ends to grow together.
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