Healing Complications After Internal Fixation of Trochanteric Hip Fractures: The Prognostic Value of Osteoporosis

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Abstract
In a 3-year prospective randomized trial, the prognostic value of osteoporosis in terms of predicting healing complications due to implant failures or loss of fracture reduction has been studied in 113 patients with inter-trochanteric hip fractures treated with either a sliding screwplate or Ender nailing. According to the Barnet and Nordin's osteoporosis index, 66 patients were considered to have moderate or severe osteoporosis. There were no differences between patients with or without osteoporosis as regards the number of fractures with collapse in varus > 10 degrees, redislocation > 10 mm, or compression exceeding 10 mm. Six months after surgery, 48 patients failed in healing or healed with complications. These cases disclosed increased osteoporosis in comparison with those showing noncomplicated healing. Patients with osteoporosis who had unstable fractures treated by Ender nailing were found to have the worst prognosis for healing complications (p = 0.006). Of the 33 fractures with implant failures, 25 (76%) occurred in patients with osteoporosis (p = 0.04). In patients with osteoporosis, the frequency of mechanical failures was significantly higher in fractures with the device positioned incorrectly. Independently of the device used, patients with unstable trochanteric hip fractures and osteoporotic bone were the group with the highest risk for failures of the implant.

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