Pes Planus Causes, Indications And Therapy

posted on 04 Apr 2015 00:44 by industriousgal91
Overview

Acquired Flat Foot

Basically, fallen arches refers to a flattening of the feet that takes place in adulthood. Although there may be other causes, this flattening usually occurs when the tendon (posterior tibial tendon) and ligaments that hold the arch in place gradually stretch. As we get older and our cumulative use of these tendons and ligaments increases, they lose their ability to maintain that nice arch shape, and may even begin to tear. This stretching or tearing may also be the result of an injury, obesity, or a genetic predisposition for flat feet.




Causes

The most common acquired flat foot in adults is due to Posterior Tibial Tendon Dysfunction. This develops with repetitive stress on the main supporting tendon of the arch over a long period of time. As the body ages, ligaments and muscles can weaken, leaving the job of supporting the arch all to this tendon. The tendon cannot hold all the weight for long, and it gradually gives out, leading to a progressively lower arch. This form of flat foot is often accompanied by pain radiating behind the ankle, consistent with the course of the posterior tibial tendon. Compounding matters is the fact that the human foot was not originally designed to withstand the types of terrain and forces it is subjected to today. Nowhere in nature do you see the flat hard surfaces that we so commonly walk on in present times. Walking on this type of surface continuously puts unnatural stress on the arch. The fact that the average American is overweight does not help the arch much either-obesity is a leading cause of flat feet as the arch collapses under the excessive bodyweight. Furthermore, the average life span has increased dramatically in the last century, meaning that not only does the arch deal with heavy weight on hard flat ground, but also must now do so for longer periods of time. These are all reasons to take extra care of our feet now in order to prevent problems later.




Symptoms

Many people have flat feet and notice no problems and require no treatment. But others may experience the following symptoms, Feet tire easily, painful or achy feet, especially in the areas of the arches and heels, the inside bottom of your feet become swollen, foot movement, such as standing on your toes, is difficult, back and leg pain, If you notice any of these symptoms, it's time for a trip to the doctor.




Diagnosis

If you notice that your feet are flat, but you?re not really experiencing any pain, then you?re probably okay to go without a visit to the podiatrist (unless, of course, you have a lack of feeling in your foot). You can schedule a hair appointment instead, or maybe see a movie. However, once painful symptoms start to appear, it?s better to skip the hirsute (or cinematic) experience and go see your foot doctor. Your podiatrist will likely make the diagnosis by examining your foot visually, asking about symptoms you may be experiencing, and may test your muscle strength. You may be asked to stand on your toes (in a ballerina pose, if you prefer, although that?s certainly not required), or walk around the examining room, and you may need to show the podiatrist your shoes. He or she may comment on your excellent taste in footwear, but is more likely to check your shoes for signs of wear that may indicate fallen arches. Your podiatrist may recommend X-rays, a CT scan or an MRI in order to get a look at the interior of your foot, although the best diagnosis usually comes from the doctor?s own in-person examination.




Non Surgical Treatment

Treatment of flat feet may be appropriate if there is associated foot or lower leg pain, or if the condition affects the knees or the lower back. Treatment may include using Orthoses such as an arch support, foot gymnastics or other exercises as recommended by a podiatrist/orthotist or physical therapist. In cases of severe flat feet, orthoses should be used through a gradual process to lessen discomfort. Over several weeks, slightly more material is added to the orthosis to raise the arch. These small changes allow the foot structure to adjust gradually, as well as giving the patient time to acclimatise to the sensation of wearing orthoses. Once prescribed, orthoses are generally worn for the rest of the patient's life. In some cases, surgery can provide lasting relief, and even create an arch where none existed before; it should be considered a last resort, as it is usually very time consuming and costly.




Surgical Treatment

Flat Foot

Surgical correction is dependent on the severity of symptoms and the stage of deformity. The goals of surgery are to create a more functional and stable foot. There are multiple procedures available to the surgeon and it may take several to correct a flatfoot deformity. Stage one deformities usually respond to conservative or non-surgical therapy such as anti-inflammatory medication, casting, functional orthotics or a foot ankle orthosis called a Richie Brace. If these modalities are unsuccessful surgery is warranted. Usually surgical treatment begins with removal of inflammatory tissue and repair of the posterior tibial tendon. A tendon transfer is performed if the posterior tibial muscle is weak or the tendon is badly damaged. The most commonly used tendon is the flexor digitorum longus tendon. This tendon flexes or moves the lesser toes downward. The flexor digitorum longus tendon is utilized due to its close proximity to the posterior tibial tendon and because there are minimal side effects with its loss. The remainder of the tendon is sutured to the flexor hallucis longus tendon that flexes the big toe so that little function is loss. Stage two deformities are less responsive to conservative therapies that can be effective in mild deformities. Bone procedures are necessary at this stage in order to recreate the arch and stabilize the foot. These procedures include isolated fusion procedures, bone grafts, and/or the repositioning of bones through cuts called osteotomies. The realigned bones are generally held in place with screws, pins, plates, or staples while the bone heals. A tendon transfer may or may not be utilized depending on the condition of the posterior tibial tendon. Stage three deformities are better treated with surgical correction, in healthy patients. Patients that are unable to tolerate surgery or the prolonged healing period are better served with either arch supports known as orthotics or bracing such as the Richie Brace. Surgical correction at this stage usually requires fusion procedures such as a triple or double arthrodesis. This involves fusing the two or three major bones in the back of the foot together with screws or pins. The most common joints fused together are the subtalar joint, talonavicular joint, and the calcaneocuboid joint. By fusing the bones together the surgeon is able to correct structural deformity and alleviate arthritic pain. Tendon transfer procedures are usually not beneficial at this stage. Stage four deformities are treated similarly but with the addition of fusing the ankle joint.




Prevention

Strap the arches into the anatomically correct positions with athletic tape and leave them like this for some time. If the fallen arches are an issue with the muscular structure, this may give the muscles an opportunity to strengthen. This is definitely not a fallen arches cure all the time but it can help prevent it more times than not. Ask a doctor or physical therapists to show you how to do this taping. Find shoes that fit. This may require that you get your foot measured and molded to ensure that the shoe will fit. Shoes that are too big, too tight or too short, may not directly cause the fallen arches, but they can assist with the damage to the area. These shoes should have thick cushioning inside and have plenty of room for your toes. Walk without shoes as much as possible. Shoes directly assist with weakening and distorting the arches of the feet so going without shoes can actually help strengthen your arches and prevent fallen arches. Walking on hard and bumpy surfaces barefooted makes the muscles in your feet strengthen in order to prevent injury. It is a coping mechanism by your body. Insert heel cups or insoles into the shoes that you wear the most. Many people wear uncomfortable shoes to work and these are the same shoes that cause their arches the most problems. Inserting the heel cups and insoles into these shoes can prevent fallen arches from occurring. Many people place these inserts into all their shoes to ensure support. Ask a medical professional, either your doctor or a physical therapist, about daily foot exercises that may keep the arches stronger than normal. Many times, you can find exercises and stretches on the Internet on various websites. Curling your toes tightly and rotating your feet will help strengthen your longitudinal arches. Relax your feet and shake them for a minute or so before you do any arch exercises. This will loosen the muscles in your feet that stay tight due to normal daily activities. Wear rigid soled sandals whenever possible to provide a strong support for your arches. Wooden soled sandals are the best ones if available. Walk or jog on concrete as much as you can. This will create a sturdy support for your arches. Running or walking in sandy areas or even on a treadmill, does not give rigid support. Instead, these surfaces absorb the step, offering no support for arches.




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.