[Surgical treatment of unstable trochanteric fractures of the femur. II. Elastooptic and tensometric studies of the isolated femur and fixed bones in trochanteric fractures using angular or intramedullary Y nails].
Here are presented the results of investigations on the isolated femur and after osteotomy the re-enacting of experimental 2nd degree trochanteric fractures. The connection of fractured bone fragments has been performed with the use of the angular or intramedullar Y nail. It has been stated that pressures (overload 2000 N) on the fracture surface in the bone connected by the use of the intramedullar Y nail are lower than the bone tension prior to fracture in the same place. So far as the angular nail is concerned the connections made by the use of that nail is characterized by lower pressures than tensions prior to fracture (overload 1000 N) and is 20% higher than tensions in the site of hypothetic fracture (overload 2000 N). Moreover, the intramedullar Y nail transfers the pressure below the site of the trochanteric fracture cross-section, relieving the pressure of the fracture site. The length of the intramedullar part of the Y nail is equal to 3/4's of the femur length and is sufficient for stabilization of post-fracture bone fragments.
B
B
Frańczuk
D001858:Bone Nails; D004548:Elasticity; D005269:Femur / Q000503:physiopathology / Q000601:surgery*; D005594:Fracture Fixation, Intramedullary / Q000295:instrumentation* / Q000379:methods; D006620:Hip Fractures / Q000601:surgery*; D006801:Humans; D013718:Tensile Strength
Leczenie operacyjne niestabilnych złamań kretarzowych kości udowej. Cz. II. Badania elastooptyczne i tensometryczne kości udowych izolowanych oraz kości zespolonych z powodu złamań kretarzowych gwoździem katowym lub gwoździem śródszpikowym Y.