-transparent.png){kind=logo}
We measured the bone mineral content (BMC) of 21 human femoral autopsy specimens using Radiographic Attenuation Technique (RAT). The specimens were then tested for stiffness in a material-testing machine. Osteosynthesis was performed after medial femoral neck osteotomy, using 1 of 3 different pinning methods: 2 hook pins (LIH), 2 cannulated screws (Uppsala), and 3 cannulated screws (CHP). The specimens were allocated to each method by grouping them in triplets with similar BMC. Cyclic loading at 500-1000 N and 1 Hz was performed during 50 minutes. The amount of axial compression during loading was measured. Finally, loading to failure was done and post-fixation stiffness and ultimate compression strength recorded. With one exception, all cases failed where the BMC was less than 0.4 g/cm2. No differences between the methods of osteosynthesis were found. The fixation strength was mostly dependent on the strength of the bone, i.e., the degree of osteoporosis.
A Sjöstedt, and
C Zetterberg, and
T Hansson, and
E Hult, and
L Ekström
January 1993,
Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA,
A Sjöstedt, and
C Zetterberg, and
T Hansson, and
E Hult, and
L Ekström
October 1976,
Acta orthopaedica Scandinavica,
A Sjöstedt, and
C Zetterberg, and
T Hansson, and
E Hult, and
L Ekström
September 1988,
Scandinavian journal of clinical and laboratory investigation,
A Sjöstedt, and
C Zetterberg, and
T Hansson, and
E Hult, and
L Ekström
February 1989,
Acta orthopaedica Scandinavica,
A Sjöstedt, and
C Zetterberg, and
T Hansson, and
E Hult, and
L Ekström
March 1982,
Clinical orthopaedics and related research,
A Sjöstedt, and
C Zetterberg, and
T Hansson, and
E Hult, and
L Ekström
January 2021,
Acta chirurgiae orthopaedicae et traumatologiae Cechoslovaca,
A Sjöstedt, and
C Zetterberg, and
T Hansson, and
E Hult, and
L Ekström
April 1974,
Acta radiologica: therapy, physics, biology,
A Sjöstedt, and
C Zetterberg, and
T Hansson, and
E Hult, and
L Ekström
March 2011,
Clinical orthopaedics and related research,
A Sjöstedt, and
C Zetterberg, and
T Hansson, and
E Hult, and
L Ekström
August 2006,
Ortopedia, traumatologia, rehabilitacja,
A Sjöstedt, and
C Zetterberg, and
T Hansson, and
E Hult, and
L Ekström
January 1990,
Investigative radiology,
