Prospective comparative studies comparing outcomes of primary ACL reconstruction with hamstring and patellar tendon grafts (Level I and II evidence) |
Retrospective comparative studies and case series (Level III and IV evidence) |
Five-year minimum follow-up |
Less than 5-year minimum follow-up |
Reconstruction with patellar tendon or hamstring tendon autograft |
Utilization of graft tissue other than patellar tendon or hamstring tendon |
All-arthroscopic, arthroscopic-assisted, or mini-arthrotomy technique |
Open ACL reconstruction |
Report separate outcomes based on graft type |
Multi-ligament knee injury other than low grade MCL injuries |
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Inclusion of skeletally immature patients |
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Use of allograft |
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Animal studies |
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In vitro studies |
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Non-English studies |
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Reviews without original data |
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Inclusion of revision ACL reconstructions |
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Use of artificial ligaments |