All of the following are types of avascular nonunion of fracture except NOT RELATED-OHO: (A) Torsion wedge nonunion, (B) Oligotrophic nonunion, (C) Comminuted nonunion, (D) Defect nonunion
Answer is B. Definition (FDA panel) of nonunion: It is said to be established when a minimum of 9 months has elapsed since injury and fracture shows no radiologically visible progress suggestive of healing continuously for 3 months.