Union of the ends of a broken bone resulting in a deformity or a crooked limb; frequently used interchangeably with faulty union. SYN: vicious union.
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mal·union .mal-'yün-yən n incomplete or faulty union (as of the fragments of a fractured bone)
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n.
union of a fracture in an abnormal position. Arthritis of adjoining joints may develop as a complication later. osteotomy may be needed to correct the deformity and prevent the complication.
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mal·un·ion (mal-ūnґyən) union of the fragments of a fractured bone in a faulty position.Medical dictionary. 2011.