title: Biomechanical determination of the optimal number of fixation screws for the sliding hip screw plate.
abstract: Laboratory measurement of the tensile forces on the plate fixation screws of the sliding hip nail demonstrated that most of the force is borne by the proximal three screws in an intertrochanteric fracture model. Testing of an intact femur, which simulate a healed femur, demonstrated a proximal shift of the screw forces. Four screws appear adequate for fixation if screw torque is controlled.
authors.affiliation: Hospital for Joint Diseases Orthopedic Institute, New York, NY, USA.
authors.forename: S M
authors.initials: SM
authors.lastname: Reich
authors.forename: W L
authors.initials: WL
authors.lastname: Jaffe
authors.forename: F J
authors.initials: FJ
authors.lastname: Kummer
mesh_terms: D001696:Biomechanical Phenomena; D001860:Bone Plates; D001863:Bone Screws; D002102:Cadaver; D004868:Equipment Failure; D005264:Femoral Fractures / Q000601:surgery*; D005269:Femur / Q000502:physiology*; D006801:Humans; D016268:Internal Fixators; D013314:Stress, Mechanical