Retrograde Locked Intramedullary Nailing for Aseptic Supracondylar Femoral Nonunion following Failed Locked Plating

Abstract

Purpose.

To review the outcome of retrograde locked nailing for aseptic supracondylar femoral nonunions following failed locked plating.

Methods.

Records of 20 men and 4 women aged 20 to 57 (mean, 39) years who underwent retrograde locked intramedullary nailing for aseptic supracondylar femoral nonunion following failed locked plating were reviewed. There were 20 closed and 4 open Gustilo type II or IIIA fractures secondary to motor vehicle accidents (n=21) or falls (n=3). Patients had undergone one to 3 operations. The mean time from injury to the present revision surgery was 1.3 years. No patient had a flexion contracture. The locked plate was removed and replaced with a retrograde dynamic locked nail (with or without buttress plate augmentation) followed by bone grafting.

Results.

17 men and 4 women were followed up for a mean of 3.4 years. The rest were lost to follow-up. The 21 patients achieved bone union after a mean of 4.3 months. The mean maximal knee flexion improved from 97.1° to 107.6° (p=0.03). Knee function was excellent in one, good in 15, and fair in 5 knees. The fair outcome was due to extension contracture, varus knee deformity, or knee pain. There were 3 malunions with varus deformity of 7°, 8°, and 9° each. No patient had deep infection causing a nonunion. All 21 patients could walk without aids.

Conclusion.

Retrograde locked intramedullary nailing for aseptic supracondylar femoral nonunions following failed locked plating achieved a high union rate.

Keywords

bone nails bone plates femur

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