The effect of notchplasty in anterior cruciate lig

Authors: Kenan Keklikci Can Yapici Donghwi Kim Monica LindeRosen Patrick Smolinski Freddie H Fu

Publish Date: 2012/12/16

Volume: 21, Issue: 8, Pages: 1915-1921

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Abstract

Twelve n = 12 porcine knees were tested using a robotic testing system Four knee states were compared 1 intact ACL 2 ACLdeficient 3 anatomic single bundle SB ACL reconstruction and 4 anatomic SB ACL reconstruction with a 5mm notchplasty The graft was fixed at 60° of flexion full extension of porcine knee is 30° with an 80N tension The knees were subjected to two loading conditions an 89N anterior tibial load ATT and 4 Nm internal IR and external tibial ER rotational torques The kinematics and in situ force obtained from the different knee conditions were comparedThere were no significant differences between pre and postnotchplasty in the ER at 30° and 60° of knee flexion ns However a significant difference was found between pre and postnotchplasty in ATT at 30° and 60° of flexion p  005 The in situ force in the anatomic SB reconstruction with notchplasty was significant lower than the intact and anatomic reconstructed ACL prenotchplasty at 30° 60° and 90° of knee flexion p  005 In response to the IR tibial torque there were significant differences between pre and postnotchplasty in IR at 60° p  005 of knee flexionNotchplasty had greater effect on anterior stability than rotational stability This change in knee kinematics could be detrimental to a healing bone graft ligamentization and could lead to failure of the reconstruction in early postoperative period

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