title: [Adaptive planing model for osteosynthesis of femoral neck fracture].
abstract: To investigate how surgeons can be supported in planning of screws for femoral neck fracture fixation reducing incidents of misplaced screws, a system was developed which makes use of a deformable model to be adapted to the femoral head/neck. The accuracy and usability of the system was checked against planning support systems mimicking the conventional positioning of screws within bi-planar x-rays. All designs were evaluated and compared by N = 7 test user. Checking the rate of misplaced screws a) at the femoral neck yielded rates of 8% or up to 42%, b) at the femoral head yielded rates of 0% or up to 11% for model-based or conventional planning, respectively. It is thus suggested to constrain the planning and navigation space by means of deformable models of the bone.
authors.affiliation: Institut für biomedizinische Technologien, Helmholtz-Institut, RWTH-Aachen, Deutschland. zimolong@hia.rwth-aachen.de
authors.forename: A
authors.initials: A
authors.lastname: Zimolong
authors.forename: D
authors.initials: D
authors.lastname: Friedrichs
authors.forename: F
authors.initials: F
authors.lastname: Portheine
authors.forename: F
authors.initials: F
authors.lastname: Traub
authors.forename: K
authors.initials: K
authors.lastname: Radermacher
mesh_terms: D001863:Bone Screws; D003198:Computer Simulation; D005265:Femoral Neck Fractures / Q000601:surgery*; D005593:Fracture Fixation, Internal; D006801:Humans; D021621:Imaging, Three-Dimensional; D025321:Surgery, Computer-Assisted