Achilles tendon length in children evaluated sonographically.

The purpose of this study was to improve our knowledge of the behavior of the Achilles tendon as a basis for decision-making in Achilles lengthening or tenotomy, we sonographically measured the normal and club feet of 101 babies, mean age 4 months, in standard parameters: tibio-talo-calcaneal angle, length of Achilles tendon, distance from tibia to calcaneus, and distance from a line parallel to the posterior cortex of the tibia to the calcaneus. All measurements were age-matched from birth to 1 year in maximal plantar and dorsal flexion. In conclusion, we describe the normal values for the four parameters in plantar and dorsal flexion.