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Change in BMD in Gruen zone 7 in THA patients with normal or low systemic BMD, as a function of healing time. In all groups, bone loss in this zone was statistically significant at 24 months (p < 0.001). Osteopenic (n = 22) and osteoporotic (n = 5) patients showed greater bone loss than patients with normal BMD (n = 12) (p = 0.037). Mean values and 95% CIs are given.
