Background Hamstring autograft size <8 mm has been shown to be a predictor for failure after anterior cruciate ligament (ACL) reconstruction. The ability to predict graft size preoperatively is helpful in counseling patients about the possible need for graft augmentation. Purpose To determine whether preoperative ultrasound (US) measurements of hamstring tendons can predict intraoperative gra...

The tension in an anterior cruciate ligament graft may not be normal when the femoral tunnel is placed using the single-incision arthroscopic technique because the femoral tunnel is drilled through the tibial tunnel. We hypothesized that the in vivo tensile behavior of the double-looped semitendinosus and gracilis tendon graft can be normal or abnormal compared with the native anterior cruciate...

The purpose of this study was to evaluate the predictive value MRI in determining hamstring autograft size preoperatively for pediatric ACL reconstructions. Children and adolescents from 10-20 years old that had undergone reconstruction using were identified 2017-2018. Semitendinosus gracilis cross-sectional area diameter measured on preoperative knee MRIs field interest (FOI) distance measurem...

An isometer, a highly compliant spring-scale device for measuring suture displacement, has been used intraoperatively by surgeons to select the optimal placement of the femoral tunnel for an anterior cruciate ligament graft. The isometer measures the displacement of a suture centered in a tibial tunnel and attached to an intraarticular location on the femur before the femoral tunnel is drilled....

BACKGROUND Despite the importance of hamstring tendon autograft, one major disadvantage in applying this technique in the surgical reconstruction of anterior cruciate ligament is individual variability in the tendon diameter. Hence, the purpose of the present study was to use anthropometric parameters such as gender, height and body mass index to predict 4-strand (quadruple) hamstring tendons (...

One purpose of this study was to determine the stiffness of three femoral fixation methods used commonly in anterior cruciate ligament (ACL) reconstruction to secure a double-looped semitendinosus and gracilis (DLSTG) graft and then assess how the stiffness of these methods affects the stiffness of the young human femur-fixation method-graft complex at the time of reconstruction. A second purpo...

We have studied the role of the temporal correlation of multiple cell discharges in the facilitation of the somatosensory information transmission from the gracilis nucleus to the primary somatosensory (SI) cortex in anesthetized rats. Pairs of gracilis neurons or gracilis-SI cortical neurons were recorded during application of 20-ms tactile stimuli in control conditions and after electrical co...

BACKGROUND Our hypothesis that multiple, equally tensioned strands of hamstring graft used for reconstruction of the anterior cruciate ligament are stronger and stiffer than ten-millimeter patellar ligament grafts was tested biomechanically with use of tendons from cadavera. METHODS In the first part of the study, we measured the strength and stiffness of one, two, and four-strand hamstring g...

BACKGROUND Several tendon graft and fixation methods have been introduced in medial patellofemoral ligament (MPFL) reconstruction for recurrent patellar dislocation. The purpose of this study was to evaluate the results of MPFL reconstruction using a gracilis autograft fixation without bone tunnel in patients with recurrent patellar instability. METHODS Nine patients (four males and five fema...