The Mechanics of Normal and Hallux Valgus Feet-A Quantitative Study

Does Alignment in the Hindfoot Radiograph Influence Dynamic Foot-floor Pressures in Ankle and Tibiotalocalcaneal Fusion?

“…Sixth, measurements were made with the patients in bare feet. Even though we rarely walk barefoot, because there is such a wide variety of shoe wear and shoes alter the pedobarographic examination to such a degree that meaningful results cannot be measured, measurements frequently are made with the patient barefoot [2,6,14,16,19,20,26,28,40,41]. We cannot presume we would have the same findings were the patients wearing shoes.…”

“…This dynamic alignment can be measured by pedobarography, allowing measurement of pressure distribution of the foot during the rollover process [6,7,9,23,32]. Barefoot pedobarography has been used to observe correlation of foot pain and abnormally high pressure areas in clubfeet [6,14], to identify high pressure areas at risk for ulceration [2,16,41], and to investigate the mechanical change in patients with rheumatoid arthritis in the feet [28,40], metatarsalgia [19], hallux valgus [20], and cavovarus deformity [26].…”

Abnormal Biomechanics of the Foot and Ankle

“…As a result of first ray insufficiency, a callus or keratosis develops under the head of the second metatarsal and stress fractures are not uncommon in this area. 6 This author and others have observed ankle jaint equinus to be a frequent factor in the development of abnormal pronati~n.~,'~ Root et aI,l5 define ankle joint equinus as the lack of dorsiflexion of the ankle joint with the subtalar joint in neutral. This inability of the tibia to move anterior to the talus from footflat to midstance can result from a tight achilles tendon or a flattened dome of the talus.…”

Osteodesis for Hallux Valgus Correction: Is it Effective?

“…They are the result of the proximal phalanx, first metatarsal, and hallux sesamoid moving out of their normal anatomic positions owing to failure of their stabilizing ligaments such as the medial metatarsophalangeal collateral and medial metatarsosesamoid ligaments [7,27] that were attenuated from wearing closed-toe shoes [13] and genetic propensity [21]. Hallux valgus is a progressive condition likely attributable to the majority of stresses being borne by the first ray in walking [10]. Generally, correction of metatarsus primus varus has been regarded as the primary surgical objective because its correction facilitates effective hallux valgus and metatarsosesamoid dissociation correction [5,12,22,28].…”