title: [Rotational instability of trochanteric femoral fractures secured with the dynamic hip screw. A radiologic analysis].
abstract: In this study, a retrospective analysis of patients with trochanteric fractures fixed with a dynamic hip screw was performed (n = 238). Analysis of the complete X-rays (n = 115) revealed rotation of the head-neck fragment in 12% of the cases (n = 14). Patients with complex fracture types were more often affected by this complication (p < 0.05). The distance of lateral impaction was significantly higher in the group with rotation of the proximal fragment compared to patients without rotation (p < 0.001). The rate of cutting-out (p < 0.01), the rate of delayed union (p < 0.01) and the rate of varus angulation (p < 0.01) was significantly higher. Reoperation was necessary in 14% of the patients compared to 2% in the group without rotation. We conclude that rotational instability of a gliding implant system is a severe complication in the treatment of trochanteric fractures.
authors.affiliation: Universitätsklinik für Orthopädische Chirurgie, Inselspital Bern.
authors.forename: A
authors.initials: A
authors.lastname: Lustenberger
authors.forename: J
authors.initials: J
authors.lastname: Bekic
authors.forename: R
authors.initials: R
authors.lastname: Ganz
mesh_terms: D001863:Bone Screws; D004868:Equipment Failure; D005500:Follow-Up Studies; D017102:Fracture Healing / Q000502:physiology; D006620:Hip Fractures / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D007593:Joint Instability / Q000000981:diagnostic imaging*; D011183:Postoperative Complications / Q000000981:diagnostic imaging*; D011859:Radiography; D012086:Reoperation; D012189:Retrospective Studies; D012399:Rotation