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.
Overpronation often occurs in people with flat feet, whose plantar fascia ligament is too flexible or too long, and therefore unable to properly support the longitudinal arch of the foot. People tend to inherit the foot structure that leads to overpronation. In a normal foot the bones are arranged so that two arches are formed, the longitudinal and the transverse. Ligaments hold all the bones in their correct positions, and tendons attach muscles to bones. If the bones are held together too loosely, they will tend to move inwards as this is the easiest direction for them to go. Over time the soft tissue structures will adjust to the misalignment and the foot will become permanently over-flexible, with a flat arch.
Common conditions seen with overpronation include heel pain or plantar fasciitis, achilles tendonopathy, hallus valgus and or bunions, patellofemoral pain syndrome, Iliotibial band pain syndrome, low back pain, shin splints, stress fractures in the foot or lower leg.
So, how can you tell if you have overpronation, or abnormal motion in your feet, and what plantar fasciitis treatment will work to correct it? Look at your feet. While standing, do you clearly see the arch on the inside of your foot? If not, and if the innermost part of your sole touches the floor, then your feet are overpronated. Look at your (running/walking) shoes. If your shoes are more worn on the inside of the sole in particular, then pronation may be a problem for you. Use the wet foot test. Wet your feet and walk along a section of pavement, then look at the footprints you leave behind. A normal foot will leave a print of the heel connected to the forefoot by a strip approximately half the width of the foot on the outside of the sole. If you?re feet are pronated there may be little distinction between the rear and forefoot.
Non Surgical Treatment
No matter what the cause in your case, over pronation can be remedied in several ways. Those who are overweight should consider permanently losing weight to naturally alleviate pressure on the ligaments and heel of the foot. Also, you should consult a podiatrist to examine your posture and movement habits. You may be reinjuring yourself due to poor alignment without even knowing it. If you also have lower back problems, this could be a sign of over pronation as a result of misalignment.
Hyperpronation can only be properly corrected by internally stabilizing the ankle bone on the hindfoot bones. Several options are available. Extra-Osseous TaloTarsal Stabilization (EOTTS) There are two types of EOTTS procedures. Both are minimally invasive with no cutting or screwing into bone, and therefore have relatively short recovery times. Both are fully reversible should complications arise, such as intolerance to the correction or prolonged pain. However, the risks/benefits and potential candidates vary. Subtalar Arthroereisis. 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. HyProCure Implant. A stent is placed into a naturally occurring space between the ankle bone and the heel bone/midfoot bone. The stent realigns the surfaces of the bones, allowing normal joint function. Generally tolerated in both pediatric and adult patients, with or without adjunct soft tissue procedures. Reported removal rates, published in scientific journals vary from 1%-6%.