Immediate Effects of Wedged Insole on Patients with Medial Knee Osteoarthritis During Level Walking
Date Issued
2012
Date
2012
Author(s)
Yeh, Hsiu-Chen
Abstract
Medial knee osteoarthritis (MKOA), the most common joint disease among the middle-aged adults and the elderly, seriously affects the function of daily living. The patients tend to adopt toe-out gait to reduce knee joint pain. Laterally-wedged insole may reduce knee joint moments and joint pain through laterally-shifting COP and decreasing lever arm between knee joint center and ground reaction force; furthermore, the arch support might enhance these effects. The aims of the current study were investigate that the differences in effect of reducing knee abductor moments in patients with mild-to-moderate MKOA between hind-laterally-wedged and fore-medially-wedged insole with arch support (HFW), the new-designed insole for increasing foot progression angle, and full-length laterally-wedged insole with arch support (FLW) through motion analysis techniques. The results indicated that FLW would reduce peak knee abductor moment through increasing foot progression angle and lateral-shifted COP. Also, it was helpful to the stability. Furthermore, ankle invertor moments were increased. In contrast, although increasing foot progression angle, HFW would increase peak knee abductor moment through increased lever arm between knee joint center and ground reaction force due to failing to make COP lateral-shifted induced by medial wedge. Therefore, compared with HFW, it is recommended that FLW is suitable for patients with mild-to-moderate MKOA but with cautioned about increased ankle loading.
Subjects
Wedged insole
Arch support
Medial knee osteoarthritis
Type
thesis
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