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Table 1 Characteristics of the studies included

From: Comparison of femoral tunnel widening after anterior cruciate ligament reconstruction using cortical button fixation versus transfemoral cross-pin fixation: a systematic review and meta-analysis

StudyYearLevel of evidenceTechniqueImaging toolGraftMeasurement levelMeasurement methodFemur fixation deviceTibia fixation deviceSample sizeTime of measurement (months)
Baumfeld et al. [9]2008IVTTx-rayauto HT1 cm from the apertureAbsolute change and relative percentageRigidfixIntrafix2645.2
EBBIS + staple or screw and washer2041.8
Kong et al. [10]2012IVTTx-rayauto HT1 cm from the apertureAbsolute changeRigid fixIntrafix5657.4
EBBIS + metal screw and washer3555.5
Lopes et al. [11]2017IIIAMPCTauto HT5 mm from the apertureAbsolute change and relative percentageRigid fixBIS2013.1
EBBIS2313.8
Saygi et al. [12]2016IVTTx-rayauto HT1 cm from the apertureAbsolute change and relative percentageCross-pinBIS + staple4342.7
Toggle LocBIS + staple5038.8
Srinivas et al. [13]2016IINCCTauto HTMid-pointAbsolute changeCross-pinInterference Screw or Suture Disc1712
EBInterference Screw or Suture Disc512
Uzumcugil et al. [14]2012IIITTx-rayauto HT1 cm from the apertureAbsolute change and relative percentageTransfixBIS + staple2929.4
EBBIS + staple13332.3
  1. AMP Anteromedial portal, BIS Bioabsorbable interference screw, EB Endobutton, HT Hamstring tendon, NC Not commended, TT Transtibial