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theaforwood

Working With Fallen Arches

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Adult Acquired Flat Foot

Flat Feet and Fallen Arches are terms used to describe feet that have a low or no arch when weight bearing. There are two types of Flat Feet. Rigid Flat Foot. This type of foot is structurally flat, therefore, it has the same appearance when weight bearing and non weight bearing. Flexible Flat Foot. This is where the arch is present when non-weight bearing; however, when weight bearing it falls or collapses to a flat foot. This foot type is commonly referred to as Fallen Arches. Both of these foot types may be asymptomatic; however, they are characterised by excessive pronation of the joints of the foot (commonly the subtalar joint). The forces associated with this excessive pronation commonly results in pathological conditions, such as plantar fasciitis and tibialis posterior dysfunction which may cause pain in the feet.

Causes

There are a number of different causes that can lead to flat feet or fallen arches. These include, birth defects, while technically not a defect as such, flat feet can be a normal finding in patients from birth. However, a condition called tarsal coalition may occur where some of the bones in the foot are fused together resulting in a flatfoot. Inflammation or damage of the posterior tibial tendon. This tendon forms the end of a muscle that connects the lower leg to the foot, winding around the ankle and attaching to the inner aspect where the arch is normally present. The main role of the posterior tibial tendon is to invert the foot and maintain the arch height throughout the gait cycle. Torn muscles of the leg and foot can cause flat feet. Problems with the nerve supply to the muscles can result in reduction in tone and fallen arches. Fracture dislocation of the bones in the foot. Severe arthritis. While these are the common causes that can result in fallen arches and flat feet, it is important to recognise that there are certain risk factors that can also lead to this condition. These include advancing age, diabetes mellitus, high blood pressure, obesity and pregnancy.

Symptoms

A significant number of people with fallen arches (flat feet) experience no pain and have no problems. Some, however, may experience pain in their feet, especially when the connecting ligaments and muscles are strained. The leg joints may also be affected, resulting in pain. If the ankles turn inwards because of flat feet the most likely affected areas will be the feet, ankles and knees. Some people have flat feet because of a developmental fault during childhood, while others may find that the problem develops as they age, or after a pregnancy. There are some simple devices which may prevent the complications of flat feet.

Diagnosis

Your doctor examines your feet to determine two things, whether you have flat feet and the cause or causes. An exam may include the following steps, Checking your health history for evidence of illnesses or injuries that could be linked to flat feet or fallen arches, Looking at the soles of your shoes for unusual wear patterns, Observing the feet and legs as you stand and do simple movements, such as raising up on your toes, Testing the strength of muscles and tendons, including other tendons in the feet and legs, such as the Achilles tendon or the posterior tibial tendon, Taking X-rays or an MRI of your feet.

What causes flat foot deformity?

Non Surgical Treatment

In many cases of PTTD, treatment can begin with non-surgical approaches that may include orthotic devices or bracing. To give your arch the support it needs, your foot and ankle surgeon may provide you with an ankle brace or a custom orthotic device that fits into the shoe. Immobilization. Sometimes a short-leg cast or boot is worn to immobilize the foot and allow the tendon to heal, or you may need to completely avoid all weight-bearing for a while. Physical therapy. Ultrasound therapy and exercises may help rehabilitate the tendon and muscle following immobilization. Medications. Nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen, help reduce the pain and inflammation. Shoe modifications. Your foot and ankle surgeon may advise changes to make with your shoes and may provide special inserts designed to improve arch support.

Surgical Treatment

Adult Acquired Flat Foot

Rarely does the physician use surgery to correct a foot that is congenitally flat, which typically does not cause pain. If the patient has a fallen arch that is painful, though, the foot and ankle physicians at Midwest Orthopaedics at Rush may perform surgery to reconstruct the tendon and "lift up" the fallen arch. This requires a combination of tendon re-routing procedures, ligament repairs, and bone cutting or fusion procedures.

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 nonunion (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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