[Time-torque diagrams of self-cutting osteosynthesis screws of various lengths in fracture tests in aluminum].
Tapping screws of the Medicon system were checked for their mechanical strength by a time-torque curve and a new measurement system. To simulate a real situation three types of screws were applied. The predrill was 80% of the kernel diameter. The percentage of demolition was significantly higher with longer screws because there was a typical tilting of screws in aluminium. All tested screws had double the minimum fracture moment of 43 Ncm. Fracture of the screws occurred at about triple the torque of the maximal moment in the bones.
Neumayer
B
B
Staatliche Studienakademie, Berufsakademie Stuttgart.
D000535:Aluminum; D001696:Biomechanical Phenomena; D001863:Bone Screws; D004868:Equipment Failure; D005147:Facial Bones / Q000293:injuries* / Q000601:surgery; D005593:Fracture Fixation, Internal / Q000295:instrumentation*; D006801:Humans; D008422:Materials Testing / Q000295:instrumentation*; D008838:Microcomputers; D008953:Models, Anatomic; D009295:Nasal Bone / Q000293:injuries* / Q000601:surgery; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D012887:Skull Fractures / Q000601:surgery*; D014025:Titanium
D000535:Aluminum; D014025:Titanium
Zeit-Drehmoment-Diagramme selbstschneidender Osteosyntheseschrauben unterschiedlicher Länge bei Abrissversuchen in Aluminium.