Orthopaedic Simulation of Morton's Extension to Test the Effect on Plantar Pressures of Each Metatarsal Head in Patients Without Deformity: A Pre-post-test Study.

Orthopaedic Simulation of Morton's Extension to Test the Effect on Plantar Pressures of Each Metatarsal Head in Patients Without Deformity: A Pre-post-test Study.

The aim of this study is to simulate the orthopedic treatment called Morton's extension on non-deformed patients to check the effects on each metatarsal head on its static footprint.

The objective of this study is to perform an assimilation of the orthopedic treatment called morton extension on non-deformed patients to verify the effects on each metatarsal head on its static footprint, specifically the mean pressures and before and after the application of the morton extension.

Inclusion Criteria:

• no history of trauma to the foot;
• the presence of at least 10° of dorsiflexion at the ankle with the knee fully dorsiflexed;
• unrestricted motion of the functional subtalar joint of 30°;
• unrestricted motion along the longitudinal axis of the midtarsal joint of 15°;
• unrestricted nonweight-bearing motion of the first ray of at least 8 mm;
• greater than 50° of dorsiflexion of the hallux to the first metatarsal bisection during nonweight-bearing;
• age greater than 18 years and younger than 60 years;
• at the time of data collection, no lower limb dysfunction or chronic injury; and
• no evidence of a non-fixed deformity at first MTP and first metatarsal cuneiform joints.

Exclusion Criteria:

• plantar corns and calluses,
• hallux valgus and lesser toe deformities,
• diabetes,
• any abnormality in the lower extremity that may affect gait.