Powell M, Seid M, Szer IS: Efficacy of custom foot orthotics in improving pain and functional status in children with juvenile idiopathic arthritis: a randomized trial. .J Rheumatol32::943. ,2005. .15868634)| false
Chalmers AC, Busby C, Goyert J, et al: Metatarsalgia and rheumatoid arthritis: a randomized, single blind, sequential trial comparing two types of foot orthoses and supportive shoes. .J Rheumatol27::1643. ,2000. .
Chalmers AC, Busby C, Goyert J, et al: Metatarsalgia and rheumatoid arthritis: a randomized, single blind, sequential trial comparing two types of foot orthoses and supportive shoes. .J Rheumatol27::1643. ,2000. .10914845)| false
Gross MT, Byers JM, Krafft JL, et al: The impact of custom semi-rigid foot orthotics on pain and disability for individuals with plantar fasciitis. .J Orthop Sports Phys Ther32::149. ,2002. .11949663)| false
Genova JM, Gross MT: Effect of foot orthotics on calcaneal eversion during standing and treadmill walking for subjects with abnormal pronation. .J Orthop Sports Phys Ther30::664. ,2000. .11104377)| false
Woodburn J, Helliwell PS, Barker S: Changes in 3D joint kinematics support the continuous use of orthoses in the management of painful rearfoot deformity in rheumatoid arthritis. .J Rheumatol30::2356. ,2003. .
Woodburn J, Helliwell PS, Barker S: Changes in 3D joint kinematics support the continuous use of orthoses in the management of painful rearfoot deformity in rheumatoid arthritis. .J Rheumatol30::2356. ,2003. .14677177)| false
Background: Research on foot orthoses has shown that their effect on the kinematics of the rearfoot is variable, with no consistent patterns of changes being demonstrated. It has also been hypothesized that the mechanical effect of foot orthoses could be subject specific. The purpose of our study was to determine if maximally pronated feet have a different response to frontal plane wedging of foot orthoses than do nonmaximally pronated feet during static stance.
Methods: One hundred six feet of 53 healthy asymptomatic subjects were divided into two groups (maximally pronated and nonmaximally pronated) on the basis of their subtalar joint rotational position during relaxed bipedal stance. Functional foot orthoses were constructed for each subject and the relaxed calcaneal stance position was measured while standing on five separate frontal plane orthosis wedging conditions, 10° valgus, 5° valgus, no wedging, 5° varus, and 10° varus, to assess changes in calcaneal position.
Results: Relative to the no-wedging condition, there were statistically significant differences (P < .05) in calcaneal position between the maximally pronated and the nonmaximally pronated feet with the 10° valgus and the 10° varus wedging conditions. No significant differences in calcaneal position were found with the 5° varus and the 5° valgus wedging conditions.
Conclusions: Our study shows that the response to foot orthoses is variable between individuals. Maximally pronated subjects do not exhibit the same response to frontal plane wedging of foot orthoses as do nonmaximally pronated with 10° wedging. Intrinsic biomechanical factors such as subtalar joint position may influence the response to foot orthoses. (J Am Podiatr Med Assoc 99(1): 13–19, 2009)
Corresponding author: Javier Pascual Huerta, DP, Department of Podiatry, Universidad Europea de Madrid, Pza. Francisco Morano, s/n, Madrid, Madrid 28005, Spain. (E-mail: firstname.lastname@example.org)