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 .
Anterior Cruciate Ligament Revision Surgery: Ipsilateral Quadriceps Versus Contralateral Semitendinosus-Gracilis Autografts.
PURPOSE To evaluate the subjective outcomes , knee stability , and donor-site morbidity after  revision ACL reconstruction using either autologous ipsilateral quadriceps tendon or contralateral semitendinosus-gracilis tendon . METHODS A sample size calculation suggested that we needed 25 patients in each group to detect e quality between both groups . Therefore , we evaluated 30 consecutive patients who underwent an ACL revision surgery with ipsilateral bone-quadriceps tendon grafts and 30 consecutive patients with the contralateral semitendinosus-gracilis grafts between January 2010 and December 2012 . Because of follow-up and exclusion criteria , finally 51 patients were evaluated . All patients were followed prospect ively for at least 2 years with KT1000 arthrometer testing and the International Knee Documentation Committee ( IKDC ) objective grading . At the 24-month follow-up , additional clinical scores were evaluated : the Knee Injury Osteoarthritis Outcome Score ( KOOS ) , the Lysholm score , assessing pain during kneeling , and anterior knee pain . RESULTS The KT1000 postoperative arthrometer side-to-side difference was 2.0 ± 1.2 mm for the quadriceps group and 3.0 ± 2.9 mm for the semitendinosus-gracilis group . The difference was not statistically significant ( P = .461 ) . There was also no difference in the rate of positive pivot-shift tests between groups ( P = .661 ) . The Lysholm score was 82.5 ± 18 in the quadriceps group and 73.8 ± 19 in the semitendinosus-gracilis group . The difference was not statistically significant ( P = .060 ) . There was also no significant difference in the single KOOS subscores , assessing pain while kneeling and anterior knee pain ( included in the KOOS score ) . No rerupture occurred during follow-up . CONCLUSIONS Revision ACL reconstruction using the quadriceps tendon graft showed clinical outcomes similar to those of the contralateral semitendinosus-gracilis graft in terms of knee stability and function . Thus , the bone-quadriceps tendon graft may be a good alternative to the contralateral semitendinosus-gracilis tendon graft for revision ACL reconstruction . LEVEL OF EVIDENCE Level II , prospect i ve comparative study
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 .