One of the main postural deviations that cause pain and injury in the foot and ankle area (and resultant compensations in the rest of the body) is overpronation. Pronation is a normal function that occurs when the foot rolls inward toward the midline of the body. This movement causes the heel to collapse inward and the medial arch of the foot to elongate and flatten. Overpronation, however, is when the foot collapses too far inward for normal function. Consequently, this directly affects the ability of the foot to perform and can disrupt proper functioning through the entire body.
Pronation can occur as an overuse syndrome in active runners, where a great deal of stress is placed on ligaments and tendons that support the medial column. Obesity is another predictor for pronation and deterioration of the medial ligaments and posterior tibial tendon due to excessive stress on these tissues. Acute Trauma can also lead to over-pronation when ligaments are torn or tendon is ruptured. Once again this can lead to a collapse of the medial column. Arthritic conditions involving the knee joint when the joint is in varus (inner collapse) posture, this places the center of gravity over the ankle joint rather than the foot causing undue pressure on the inner ankle.
Overpronation can negatively affect overall body alignment. The lowering of the longitudinal arch pulls the heel bone in, causing the leg, thigh bone and hip to rotate inwards, and an anterior tilt of the pelvis. Unnecessary strain to the ankles, knees, hips and back can result. Plantar fasciitis and inflammation, metatarsal pain, problems with the Achilles tendon, pain on the inside of the knee, and bursitis in the hip are just some of the conditions commonly associated with pronation.
Do the wet foot test. Get your feet wet and walk along a paved surface or sand and look at the footprints you leave. If you have neutral feet you will see a print of the heel with a thin strip connecting to your forefoot, but if you're overpronating your foot print will look a bit like a giant blob with toes.
Non Surgical Treatment
If you overpronate, you should talk with a foot and ankle specialist, especially if symptoms have not developed yet. Questions you may want to ask your doctor include what are the best running shoes on the market? Where can I find those shoes? If over-the-counter orthotics don?t work, how long should I wait before contacting you for custom-made orthotics? On my next visit, what type of diagnostic testing should I expect? If I limit the amount of time I spend running, will my overpronation symptoms disappear? What additional treatment options can we try?
Subtalar Arthroereisis. The ankle and hindfoot bones/midfoot bones around the joint are fused, locking the bones in place and preventing all joint motion. This may also be done in combination with fusion at other joints. This is a very aggressive option usually reserved for extreme cases where no joint flexibility is present and/or the patient has severe arthritic changes in the joint.