Reverse Obliquity Intertrochanteric Fracture Treated with a Dynamic Distal Locked Intramedullary Hip Nail

  • MATSUGAKI TORU
    Department of Orthopaedic Surgery, Saiseikai Fukuoka General Hospital
  • MIZU-UCHI HIDEKI
    Department of Orthopaedic Surgery, Saiseikai Fukuoka General Hospital
  • SHIBATA HIDEAKI
    Department of Orthopaedic Surgery, Saiseikai Fukuoka General Hospital
  • NAKANISHI YOSHITAKA
    Department of Orthopaedic Surgery, Saiseikai Fukuoka General Hospital
  • MATSUBARA TSUNEMASA
    Department of Orthopaedic Surgery, Saiseikai Fukuoka General Hospital
  • ARATAKE YUJI
    Department of Orthopaedic Surgery, Saiseikai Fukuoka General Hospital
  • FUDO TAKUMA
    Department of Orthopaedic Surgery, Saiseikai Fukuoka General Hospital

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<p>Summary: Introduction: The aim of this study was to describe the clinical and radiological results of reverse obliquity intertrochanteric fractures treated with dynamic distal locked intramedullary hip nails. </p><p>Materials and methods: Patients with a reverse obliquity intertrochanteric fracture (AO/OTA type 31 A3.1 or A3.3) underwent surgical treatment with a dynamic distal locked intramedullary hip nail between August 2017 and September 2020. Fracture type, reduction quality, change in the position of the distal bone fragment, bone union, complications, and walking ability were evaluated. </p><p>Results: Ten patients with reverse obliquity intertrochanteric fractures (seven females and three males) underwent dynamic distal locked intramedullary hip nailing. The mean age was 72.0 ± 18.9 years. Two patients were classi fied as having A3.1 fractures; eight patients were classified as having A3.3 fractures. Anatomical reduction was achieved in six patients, medial displacement remained in three patients, and lateral displacement remained in one patient postoperatively. In 9 out of 10 patients, the center of the proximal end of the distal bone fragment had moved laterally between the time immediately after surgery and the time of the final evaluation. Bone union was obtained uneventfully without any additional treatments in all patients. There were no complications such as infection or implant failure. Walking ability decreased in four patients. </p><p>Conclusion: In all patients, bone union was achieved due to good contact of the medial cortices or the migration of the distal bone fragment into the proximal bone fragment. This procedure can be an option for treating reverse obliquity intertrochanteric fractures.</p>

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