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The Journal of Bone and Joint Surgery, Vol 66, Issue 4 504-509, Copyright © 1984 by Journal of Bone and Joint Surgery, Inc
The natural history of scaphoid non-union
GR Mack, MJ Bosse, RH Gelberman and E Yu
We reviewed the clinical and roentgenographic findings of forty-seven
non-unions of a fracture of the scaphoid in forty-six symptomatic patients
in order to assess the incidence and severity of degenerative changes of
the wrist. The duration of non-union ranged from five to fifty-three years.
Three roentgenographic patterns were seen: twenty-three lesions had
sclerosis, cyst formation, or resorptive changes confined to the scaphoid
bone (Group I); fourteen had radioscaphoid arthritis (Group II); and ten
had generalized arthritis of the wrist (Group III). The duration of Group-I
non-unions averaged 8.2 years; Group-II, 17.0 years; and Group-III
non-unions, 31.6 years. Fracture displacement and carpal instability
correlated with the severity of degenerative changes. Lunate dorsiflexion
of 10 degrees or more was a useful guide to carpal instability. Few of the
forty-seven non-unions were undisplaced, stable, or free of arthritis after
ten years. Based on the high probability of arthritis, we recommend that
all displaced ununited scaphoid fractures be reduced and grafted,
regardless of symptoms, before degenerative changes occur. Asymptomatic
patients with an undisplaced, stable non-union should be advised of the
possibility of late degenerative changes.

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