One of the most common causes of foot and leg discomfort is a condition known as overpronation. Normal pronation, or "turning inward" of the foot is necessary as the foot adapts to the ground. With
over pronation, the arch flattens, collapses, and soft tissues stretch. This causes the joint surfaces to function at unnatural angles to each other. When this happens, joints that should be stable
now become very loose and flexible. At first, over pronation may cause fatigue. As the problem gets worse, strain on the muscles, tendons, and ligaments of the foot and lower leg can cause permanent
problems and deformities.
Acquired "Flat Feet" this develops over a period of time rather than at birth (unlike Congenital "Flat Feet"). In children, many different factors may contribute to the development of this condition
such as the type of shoes that a child wears, a child's sitting or sleeping positions or it may occur as some type of compensation for other abnormalities located further up the leg. Compensation may
occur due to the rupture (tearing) of ligaments or tendons in the foot. One common reason for this condition is that the foot is compensating for a tight Achilles Tendon. If this tendon is tight it
may cause the foot to point downward away from the body. This gives the body the perception that the affected leg is longer in length and the body attempts to compensate for the perceived additional
length by flattening out the foot arch in an attempt to provide balance and stability.
Overpronation can be a contributing factor in other lower extremity disorders, such as foot pain, plantar fasciitis, ankle injuries, medial tibial stress syndrome (shin splints), periostitis, stress
fractures and myofascial trigger points. Overpronation increases the degree of internal tibial rotation, thereby contributing to various knee disorders such as meniscal injury or ligament sprains.
The effects of the postural deviation are exaggerated in athletes due to the increase in foot strikes while running and the greater impact load experienced. When running, three to four times the body
weight is experienced with each foot strike.2 If overpronation exists, the shock force is not adequately absorbed by the foot and is transmitted further up the kinetic chain.
One of the easiest ways to determine if you overpronate is to look at the bottom of your shoes. Overpronation causes disproportionate wear on the inner side of the shoe. Another way to tell if you
might overpronate is to have someone look at the back of your legs and feet, while you are standing. The Achilles tendon runs from the calf muscle to the heel bone, and is visible at the back of the
ankle. Normally it runs in a straight line down to the heel. An indication of overpronation is if the tendon is angled to the outside of the foot, and the bone on the inner ankle appears to be more
prominent than the outer anklebone. There might also be a bulge visible on the inside of the foot when standing normally. A third home diagnostic test is called the ?wet test?. Wet your foot and
stand on a surface that will show an imprint, such as construction paper, or a sidewalk. You overpronate if the imprint shows a complete impression of your foot (as opposed to there being a space
where your arch did not touch the ground).
Non Surgical Treatment
Mild cases of Overpronation may be controlled or corrected with a supportive shoe that offers medial support to the foot along with a strong heel counter to control excessive motion at the heel
starting with heel strike. In mild cases with no abnormal mechanical pressures, an over the counter orthotic with heel cup and longitudinal or medial arch support to keep the foot from progressing
past neutral may help to realign the foot. A Custom foot orthotic with heel cup and longitudinal arch support to help correct position of the foot as it moves through motion. Heel wedges may also
assist in correcting motion.
Subtalar Arthroereisis. Primary benefit is that yje surgery is minimally invasive and fully reversible. the primary risk is a high chance of device displacement, generally not tolerated in
An implant is pushed into the foot to block the excessive motion of the ankle bone. Generally only used in pediatric patients and in combination with other procedures, such as tendon lengthening.
Reported removal rates vary from 38% - 100%, depending on manufacturer.