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Severe Pain In The Arch Of The Foot | main | Pain In The Arches Causes Symptoms And Treatments
Fallen Arches Causes And Treatment
Overview


Acquired Flat Feet


?Pes Planus? is the medical term for flat feet. It comes from Latin: Pes = foot and Planus = plain, level ground. Very few people suffer from this condition, as a true flat foot is very rare. Less than 5% of the population has flat feet. The majority of the Australian population, however, has fallen arches (an estimated 60-70% of the population) known in the medical profession as ?excess pronation? or over-pronation. Over-pronation means the foot and ankle tend to roll inwards and the arch collapses with weight-bearing. This is a quite a destructive position for the foot to function in and may cause a wide variety of foot, leg and lower back conditions.






Causes


There is a lack of normal arch development, probably due to inherent ligamentous laxity. Around 20% of adults have Pes planus. The majority have a flexible flat foot and no symptoms. However, if there is also heel cord contracture, there may be symptoms (see 'Contributing factors', below). Loss of support for the arch. Dysfunction of the tibialis posterior tendon, a common and important cause. Tear of the spring ligament (rare). Tibialis anterior rupture (rare). A neuropathic foot, e.g from diabetes, polio, or other neuropathies. Degenerative changes in foot and ankle joints. Inflammatory arthropathy, eg rheumatoid arthritis. Osteoarthritis. Fractures. Bony abnormalities, eg tarsal coalition.






Symptoms


Having flat feet can be painless and is actually normal in some people. But others with flat feet experience pain in the heel or arch area, difficulty standing on tiptoe, or have swelling along the inside of the ankle. They may also experience pain after standing for long periods of time or playing sports. Some back problems can also be attributed to flat feet.






Diagnosis


Flat feet are easy to identify while standing or walking. When someone with flat feet stands, their inner foot or arch flattens and their foot may roll over to the inner side. This is known as overpronation. To see whether your foot overpronates, stand on tiptoes or push your big toe back as far as possible. If the arch of your foot doesn't appear, your foot is likely to overpronate when you walk or run. It can be difficult to tell whether a child has flat feet because their arches may not fully develop until they're 10 years of age.






Non Surgical Treatment


The type of treatment will depend on the stage of PTTD present. There are four stages of posterior tibial tendon dysfunction. Stage I. The posterior tibial tendon is inflamed but has normal strength. There is little to no change in the arch of the foot. The patient can still perform a single-limb heel rise and has a flexible hindfoot. Orthotic treatment options include modified off the shelf inserts and custom molded orthotics. Stage 2. The tendon is partially torn or shows degenerative changes and as a result loses strength.There is considerable flattening of the arch without arthritic changes in the foot. The patient cannot perform single-limb heel rise. Pain is now present on the lateral aspect of the ankle. Orthotic treatment is similar as that in stage I, with the addition of more rigid arch supports and wedging. Stage 3. Results when the posterior tibial tendon is torn and not functioning. As a result the arch is completely collapsed with arthritic changes in the foot. A solid ankle AFO is suggested in conjunction with a modified orthopedic shoe. Stage 4. Is identical to stage three except that the ankle joint also becomes arthritic. A rigid AFO and modified orthopedic shoe is required.






Surgical Treatment


Adult Acquired Flat Feet


Surgical procedures for flat feet vary depending on the root cause of the condition. Surgical correction to control pronation may include bone implants or Achilles tendon lengthening. Tendon transfer, which is a procedure to re-attach a tendon to another area of bone, may also be used to reduce pronation and improve foot function.






Prevention


Orthotic inserts, either prescribed or bought over the counter, can help keep the arches fixed into position, but always wear them as although they support, they don?t strengthen, which is why some experts reccomend avoiding them. Gait analysis at a run specialist can help to diagnose overpronation and flat feet. Most brands produce shoes that will give support and help to limit the negative effects of a poor gait on the rest of the body. Barefoot exercises, such as standing on a towel and making fists with the toes, can help to strengthen the arches. Start easy and build up the reps to avoid cramping. Short barefoot running sessions can help take pressure off the arches by using the natural elasticity of the foot?s tendons to take impact and build strength to help prevent flat feet. These should be done on grass for only a few minutes at a time.






After Care


Patients may go home the day of surgery or they may require an overnight hospital stay. The leg will be placed in a splint or cast and should be kept elevated for the first two weeks. At that point, sutures are removed. A new cast or a removable boot is then placed. It is important that patients do not put any weight on the corrected foot for six to eight weeks following the operation. Patients may begin bearing weight at eight weeks and usually progress to full weightbearing by 10 to 12 weeks. For some patients, weightbearing requires additional time. After 12 weeks, patients commonly can transition to wearing a shoe. Inserts and ankle braces are often used. Physical therapy may be recommended. There are complications that relate to surgery in general. These include the risks associated with anesthesia, infection, damage to nerves and blood vessels, and bleeding or blood clots. Complications following flatfoot surgery may include wound breakdown or non-union (incomplete healing of the bones). These complications often can be prevented with proper wound care and rehabilitation. Occasionally, patients may notice some discomfort due to prominent hardware. Removal of hardware can be done at a later time if this is an issue. The overall complication rates for flatfoot surgery are low.
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Sophie Clare

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