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Method to Evaluate the Sagittal Plane Mobility of the Medial Arch of the Shod Foot with Foot Orthosis

Papadopoulos, Anthony PhD, CPed

JPO: Journal of Prosthetics and Orthotics: October 2019 - Volume 31 - Issue 4 - p 262–266
doi: 10.1097/JPO.0000000000000262
TECHNICAL NOTE
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Introduction Midfoot mobility plays an important role in the orthotic treatment of foot pathomechanical disorders, such as flexible pes planus and abnormal foot pronation. The sagittal plane mobility of the medial arch of only the unshod foot with a foot orthosis has been evaluated for improving therapeutic outcomes. Because foot orthoses are in-shoe devices, it is necessary to evaluate the sagittal plane mobility of the medial arch of the shod foot with a foot orthosis to optimize in-shoe orthotic effectiveness.

Materials and Methods This technical note describes a procedure using digital photography to evaluate the sagittal plane mobility of the medial arch of the shod foot with a foot orthosis. The procedure involves digitally photographing two weight-bearing states of the shoe in which the foot orthosis supports the foot: 1) 10% of body weight achieved by sitting, and 2) 50% of body weight achieved by standing. The two digital images of the shoe are then geometrically analyzed to calculate the displacement of the medial height of the dorsal surface of the shoe in response to the change in the two weight-bearing states.

Conclusions Clinicians and researchers can use the method described in this note to evaluate the sagittal plane mobility of the medial arch of the shod foot with a foot orthosis. The method is clinically useful for optimizing the in-shoe effectiveness of foot orthoses to treat foot pathomechanical disorders.

ANTHONY PAPADOPOULOS, PhD, CPed, practices clinical pedorthics in Jacksonville, Florida.

Disclosure: The author declares no conflict of interest.

Correspondence to: Anthony Papadopoulos, PhD, CPed, St Petersburg College, 600 E Klosterman Rd, Tarpon Springs, FL 34689; email: a.papadopoulos07@gmail.com

Online date: March 11, 2019

© 2019 by the American Academy of Orthotists and Prosthetists.