Authors: Yong Seuk Lee BeeOh Lim Jin Goo Kim KiKwang Lee Hyung Oh Park Keun Ok An CheCheong Ryew Jin Hyun Kim
Publish Date: 2010/09/18
Volume: 131, Issue: 3, Pages: 335-341
Abstract
During postoperative rehabilitation for posterior cruciate ligament PCL reconstruction flexion is limited to 90° for the first 6 weeks and hamstring strengthening is initiated at 3 months because of static stability The posterolateral corner sling PLCS procedure is frequently performed with PCL reconstruction to help alleviate posterolateral rotator instability and it is possible during this procedure to damage the dynamic motion and to overconstrain the kneeFor the patients group PCL and PLCS reconstructions were performed simultaneously and all reconstructed patients had stable knees and showed no complications A motion analysis system was used to measure and calculate kinematic and kinetic data for seven patients after PCL and PLCS reconstruction patients group and seven normal subjects control group during a turn running task The study was conducted on two groups at both 3 months return to daily activity and 6 months return to light sports postoperation At 6 months after surgery the dial test was also performed to observe the static rotational stabilityCompared to the control group the patients group showed a decreased extension moment −115 ± 046 vs −351 ± 069 Nm/kg p = 0000 a decreased valgus moment −136 ± 072 vs −215 ± 054 Nm/kg p = 0041 and a decreased external rotational moment −015 ± 011 vs −037 ± 010 Nm/kg p = 0002 3 months postoperatively However these results approximated to the normal control and the patients group showed an improved extension moment −295 ± 067 Nm/kg p = 0188 valgus moment −173 ± 058 Nm/kg p = 0359 and external rotational moment −030 ± 009 Nm/kg p = 0325 at 6 months postoperatively A static rotational stability revealed a similar or overconstrained state compared with the contralateral knee and no patient showed rotational instabilityPCL–PLCS reconstructed patients were reluctant to engage in or lacked strength for daily rotational activities Therefore we must consider more active and systematic cocontraction exercise of the hamstring and quadriceps and rehabilitation program about rotation that is not adverse to the static stability in PCL–PLCS reconstructed patients for early return to daily activities
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