Original articleEffects of Laterally Wedged Insoles on Knee and Subtalar Joint Moments
Section snippets
Participants
After informed consent was obtained, 26 elderly women (13 healthy elders, 13 osteoarthritic patients with a varus deformity of the knee) participated in the experiments. There were no statistically significant differences in age, height, and weight (table 1). OA patients were recruited through public advertisements in local community programs about knee OA in the area around the National Rehabilitation Center. The inclusion criteria for OA patients were: 50 years of age or older, knee pain for
Results
The effects of wearing lateral wedged insoles on the knee and subtalar joint moments during stance phase were evident in each insole condition in both the healthy elders and the OA patients (fig 2, table 2). The knee joint varus moment was significantly smaller for insole W compared with insole N (a 10.4% reduction for the healthy elders, a 5.6% reduction for the OA patients; P<.001), whereas the subtalar joint valgus moment was significantly greater for insole W compared with insole N (a 27.7%
Discussion
Our study examined the kinematic and kinetic factors of a 6° lateral wedge insole (insole W) on the knee joint varus moment in healthy elders and in OA patients. The knee joint varus moment was significantly smaller, whereas the subtalar joint valgus moment was significantly greater with insole W compared with insole N (0° wedge) in both the healthy elders and the OA patients. With insole W, this finding correlated with a more lateral shift in the location of the COP during the stance phase.
Conclusions
Generally, patients with OA had significant differences in knee joint biomechanics during walking when compared with age-matched healthy elders. As compared with insole N (0° wedge), insole W (6° wedge) significantly reduced the knee joint varus moment and increased the subtalar joint valgus moment during gait. These results of insole W also correlated with a lateral shift in the location of the COP during stance phase. With respect to the 2 OA patients who had an increase in the knee joint
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References (20)
- et al.
Static and dynamic biomechanics of foot orthoses in people with medial compartment knee osteoarthritis
Clin Biomech (Bristol, Avon)
(2002) - et al.
A technique for obtaining spatial kinematic parameters of segments of biomechanical systems from cinematographic data
J Biomech
(1980) - et al.
Talocrural and talocalcaneal joint kinematics and kinetics during the stance phase of walking
J Biomech
(1991) - et al.
Clinical evaluation of the treatment of osteoarthritic knees using a newly designed wedged insole
Clin Orthop
(1987) - et al.
The mechanics of treatment of the osteoarthritic knee with a wedged insole
Clin Orthop
(1987) - et al.
Conservative treatment of genu valgus and varum with medial/lateral heel wedges
Indiana Med
(1991) - et al.
Treatment of osteoarthritis of the knee with heel wedges
Int Orthop
(1991) - et al.
Use of lateral heel and sole wedges in the treatment of medial osteoarthritis of the knee
Orthop Rev
(1993) - et al.
The effect of wedged insoles on the thrust of osteoarthritic knees
Int Orthop
(1997) - et al.
Effect of a novel insole on the subtalar joint of patients with medial compartment osteoarthritis of the knee
J Rheumatol
(2001)
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