Flexible flatfeet are considered normal in young children because babies are not born with a normal arch. The arch may not form fully until sometime between ages 7 and 10. Even in adulthood, 15% to 25% of people have flexible flatfeet. Most of these people never develop symptoms. In many adults who have had flexible flatfeet since childhood, the missing arch is an inherited condition related to a general looseness of ligaments. These people usually have extremely flexible, very mobile joints throughout the body, not only in the feet. Flatfeet also can develop during adulthood. Causes include joint disease, such as rheumatoid arthritis, and disorders of nerve function (neuropathy). Unlike a flexible flatfoot, a rigid flatfoot is often the result of a significant problem affecting the structure or alignment of the bones that make up the foot's arch. Some common causes of rigid flatfeet include. Congenital vertical talus. In this condition, there is no arch because the foot bones are not aligned properly. In some cases, there is a reverse curve (rocker-bottom foot, in which the shape is like the bottom rails of a rocking chair) in place of the normal arch. Congenital vertical talus is a rare condition present at birth. It often is associated with a genetic disorder, such as Down syndrome, or other congenital disorders. The cause is unknown in up to half of cases. Tarsal coalition (peroneal spastic flatfoot). In this inherited condition, two or more of the foot bones are fused together, interfering with the flexibility of the foot and eliminating the normal arch. A rare condition, it often affects several generations of the same family. Lateral subtalar dislocation. Sometimes called an acquired flatfoot, it occurs in someone who originally had a normal foot arch. In a lateral subtalar dislocation, there is a dislocation of the talus bone, located within the arch of the foot. The dislocated talus bone slips out of place, drops downward and sideways and collapses the arch. It usually occurs suddenly because of a high-impact injury related to a fall from a height, a motor vehicle accident or participation in sports, and it may be associated with fractures or other injuries.
A fallen arch occurs because one of the main structures that support the arch has broken or torn. Usually it occurs without trauma, although a small injury associated with the onset of the pain is often recalled, it is sometimes difficult to determine whether the injury was clearly big enough to permanently injure the leg. I suspect that even before the symptoms that the structure that broke was weakening and the injury was simply the ?needle that broke the camels back?. The structure that is most commonly torn is the posterior tibial tendon. This tendon is attached to a muscle on the inside of the back of the ankle, and runs along the medial malleolus, the bony prominence on the inside of the ankle, to attach to a bone in the arch called the navicular bone. It usually begins to weaken and stretch along the back of the medial malleolus. It often begins as a swelling and the arch flattens over the next several weeks to months. As the arch flattens, other structures that support the arch begin to stretch and tear. The bones along the outside of the ankle begin to crush together, causing pain and swelling in this are, and the toes may tilt to the outside as the arch collapses. It is not known why this process begins. It is often associated with diabetes and rheumatoid arthritis and other inflammatory diseases. It also is more common as a person enters the fifty to seventy year age range. ?Fallen arches? are much more common in people who are already flat footed.
The primary symptom of flatfeet is the absence of an arch upon standing. Additional signs of flatfeet include the following. Foot pain. Pain or weakness in the lower legs. Pain or swelling on the inside of the ankle. Uneven shoe wear. While most cases of flatfeet do not cause problems, complications can sometimes occur. Complications include the following, bunions and calluses, inability to walk or run normally, inflammation and pain in the bottom of the foot (plantar fasciitis), tendonitis in the Achilles heel and other ligaments, pain in the ankles, knees, and hips due to improper alignment, shin splints, stress fractures in the lower legs.
There are a few simple ways to assess your foot type, and most include making an imprint of your footprint. The classic way is to stand on a hard floor surface with wet feet to make a wet foot print. Look at the narrowest part of your footprint, which should be between your heel and ball of your foot. If the print of your foot in this part is less than 10% of the width of the widest part then you are likely to have high arches. more than 10% but less than 25% then your foot profile is probably normal, more than 25% or even the widest part, then you have flat feet.
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Non Surgical Treatment
When pain results from a fallen arch, the physician may prescribe these. Rest and ice. A brace to help support the fallen arch. Physical therapy to strengthen and stretch the foot. Orthotics (arch supports) to compensate for a fallen arch. The physician may tell the patient to choose shoes that have proper arch supports and avoid non-supportive shoes such as flip-flops. If obesity contributed to the fallen arch, the patient should lose weight.
A combination of surgical procedures can be used to reconstruct the flatfoot. Generally, these procedures can be separated into those that correct deformities of the bones and those that repair ligaments and tendons. Your orthopaedic surgeon will choose the proper combination of procedures for your foot. Surgery of the foot can be performed under regional anesthesia, which is numbing the foot and ankle with a nerve or spinal block, or general anesthesia, which may require a breathing tube. A nerve block is often placed behind the knee to reduce pain after surgery.
Time off work depends on the type of work as well as the surgical procedures performed. . A patient will be required to be non-weight bearing in a cast or splint and use crutches for four to twelve weeks. Usually a patient can return to work in one to two weeks if they are able to work while seated. If a person's job requires standing and walking, return to work may take several weeks. Complete recovery may take six months to a full year. Complications can occur as with all surgeries, but are minimized by strictly following your surgeon's post-operative instructions. The main complications include infection, bone that is slow to heal or does not heal, progression or reoccurrence of deformity, a stiff foot, and the need for further surgery. Many of the above complications can be avoided by only putting weight on the operative foot when allowed by your surgeon.