Bone defects caused by femoral and tibial tunnel enlargement can pose a significant technical challenge when planning to perform revision anterior cruciate ligament reconstruction. A number of options have been described for managing osseous deficiencies, including the use of large autograft or allograft bone dowels to provide sufficient tunnel fill and subsequent structural support for revisio...

in general, the aerodynamic stability of long span bridges is evaluated based on the results of wind tunnel tests in the low reynolds number region, because in almost all wind tunnel tests, it is impracticable to satisfy reynolds number similitude. therefore, in order to correctly evaluate conventional wind tunnel test results, reynolds number effects on the aerodynamic force coefficients acting o...

The dynamic longitudinal-stability characteristics of a st,andard wind tunnel interference model have been investigated in free flight over a Mach number range of 0.92 to I, 35.. Measurements of lift-curve slope and manoeuvre margin were obtained, and are compared vjith results from transonic-tunnel tests under low blockage conditions. The analysis was extended to obtain damping derivatives to ...

In this study, closed-form solutions are presented for two classical problems: the load exerted on strip or circular trapdoors and stability of tunnel headings in purely cohesive soils, considering both case a constant undrained shear strength linear vertical profile. The based minor modification Gunn's lower-bound plasticity solution. According to comparative numerical stress analyses finite-e...

PURPOSE Proper femoral tunnel position is important for anatomical reconstruction of the anterior cruciate ligament (ACL). The purpose of this study was to evaluate the positions of femoral and tibial tunnels created using an accessory anteromedial portal technique in single bundle ACL reconstruction. MATERIALS AND METHODS The femoral tunnel was targeted at the mid-portion of the ACL bundles....

OBJECTIVE To evaluate the correlation between bone tunnel diameter after anterior cruciate ligament (ACL) reconstruction measured by computed tomography (CT) using multiplanar reconstruction (MPR) and stability or clinical scores. MATERIALS AND METHODS Forty-seven patients (41 men and 6 women, mean age: 34 years) who had undergone ACL reconstruction with the double bundle technique using auto...

Endoscopic anterior cruciate ligament (ACL) reconstruction can be performed through one-incision or two-incision technique. The current one-incision endoscopic ACL single bundle reconstruction techniques attempt to perform an isometric repair placing the graft along the roof of the intercondylar notch, anterior and superior to the native ACL insertion. However the ACL isometry is a theoretical ...

BACKGROUND This paper reports an in-vitro study for evaluating the influence of the femoral tunnel orientation in anterior cruciate ligament (ACL) double-bundle reconstructions. METHODS This work describes the experimental protocol and results obtained for six cadaver knees using the FlashPoint optical system (Image Guided, Boulder, Colorado, USA) and a computer-assisted technique for the ela...