Fracture of the femoral neck: identification of the optimal screw position by migration ratio.
A consecutive series of fractures of the femoral neck treated with sliding screw and plate osteosynthesis were evaluated radiographically for the optimal position of the screw by use of migration indices. A naturally occurring optimal position of the screw was discovered. It was characterized by four positional indices in the head-neck region which were significantly correlated with minimal migration (or best stability). This optimal screw position gave a better prognostication of reduced risk of early fracture failure compared with the usual sectional division of the femoral head as indicator of screw position.
Levi
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Department of Orthopaedic Surgery, Frederiksberg Hospital, University Hospital of Copenhagen, Denmark.
Kofoed
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H
D000368:Aged; D000369:Aged, 80 and over; D001860:Bone Plates; D001863:Bone Screws; D005260:Female; D005265:Femoral Neck Fractures / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D005593:Fracture Fixation, Internal / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011859:Radiography; D012086:Reoperation