The QT autograft detected comparable rate of Lachman test > 3 mm , Pivot shift test > 3 m and instrumental laxity > 3 mm .
The QT autograft showed a lower rate of autograft failure above all .
The QT autograft detected the reduced rate of AKP than the PT .
Quadriceps tendon autograft may represent a feasible option for primary ACL reconstruction .
The purpose of the current study was to clarify the role of the quadriceps tendon ( QT ) autograft for primary ACL reconstruction .
Thus , a Bayesian network meta- analysis comparing patients undergoing a primary ACL reconstruction with QT versus patellar tendon ( PT ) and hamstring tendon ( HT ) autografts  was conducted .
Knee laxity after staircase exercise predicts radiographic disease progression in medial compartment knee osteoarthritis.
OBJECTIVE To evaluate whether increased laxity of the knee during daily physical activities such as stair climbing is associated with progression of knee joint osteoarthritis ( OA ) . METHODS During the years 2001 - 2003 , 136 patients with bilateral primary medial compartment knee joint OA were enrolled in this prospect i ve study . Baseline data collected were body mass index ( BMI ) , muscle power , radiographic joint space width , mechanical axis on st and ing radiography , and anteroposterior ( AP ) knee laxity before and after physical exercise . After 8 years of followup , 84 patients were reexamined to assess radiographic changes . Radiographic disease progression was defined as progression of > 1 grade on the Kellgren/Lawrence scale . RESULTS AP knee laxity increased significantly after stair climbing . Patients with OA progression and those without progression did not differ significantly in age , sex , baseline quadriceps muscle strength , mechanical axis , joint space width , and AP knee laxity before exercise . The 2 groups of patients did , however , differ significantly in baseline BMI and change in AP knee laxity due to exercise . The risk of progression of knee OA increased 4.15-fold with each millimeter of increase in the change in AP knee laxity due to exercise and 1.24-fold with each point increase in the BMI . CONCLUSION Our results indicate that patients with OA progression have significantly greater changes in knee joint laxity during physical activities and a higher BMI than patients without OA progression . These findings suggest that larger changes in knee laxity during repetitive physical activities and a higher BMI play significant roles in the progression of knee OA
The QT autograft detected comparable rate of Lachman test > 3 mm , Pivot shift test > 3 m and instrumental laxity > 3 mm .
The QT autograft showed a lower rate of autograft failure above all .
The QT autograft detected the reduced rate of AKP than the PT .
Quadriceps tendon autograft may represent a feasible option for primary ACL reconstruction .
The purpose of the current study was to clarify the role of the quadriceps tendon ( QT ) autograft for primary ACL reconstruction .
Thus , a Bayesian network meta- analysis comparing patients undergoing a primary ACL reconstruction with QT versus patellar tendon ( PT ) and hamstring tendon ( HT ) autografts  was conducted .