Hip Fractures Clinical Trial
Official title:
Comparison of Dynamic Versus Static Lag Screw Modes for Cephalomedullary Nails Used to Fix Peritrochanteric Fragility Fractures
The objective of this study is to compare the failure rate between two modes of fixing the
lag screw of the cephalomedullary nail.
The sample studied will be patients who have been diagnosed with a fragility
intertrochanteric fracture.
Investigators hypothesis is that the dynamic mode will have a lower failure rate compared to
the static mode.
Intertrochanteric fragility fractures are one of the most frequent fractures in the elderly .
They produce great disability and complications in our patients and they are recognized
worldwide as a major public health problem.
The treatment that presents the best results is surgical treatment, since it reduces the
mortality of the patients and allows early loading . Thus, avoids secondary complications to
the prostration state such as pneumonia, bedsores, pulmonary embolisms, among others.
Currently, the treatment that has shown the best clinical and biomechanical results is
osteosynthesis with a cephalomedullary nail, which despite having good results is not free
from complications such as implant failure, loss of femoral offset.
Changes are constantly made in the design and surgical techniques of these implants in order
to decrease the rate of complications.
This study will particularly assess whether there is any difference in the complication rate
between dynamic versus static lag screw modes.
Biomechanical studies that compare these two lag screw modes show that axial and lateral
stiffness of the femur-nail construction is greater in static mode than in dynamic modes and
the torsional stiffness is greater in dynamic mode than in static modes.
There are no studies comparing the clinical results of these two variants.
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