posted on 14 Jan 2015 03:07 by warrenioao
The plantar fascia (a connective tissue structure) stretches from the toes and ball of the foot, through the arch, and connects to the heel bone in three places: outside, center and inside. Normally it helps the foot spring as it rolls forward. It also provides support for the arch of the foot. The plantar fascia helps keep the foot on track, cutting down on oscillation. When the foot over-pronates (rolls to the inside) the plantar fascia tries to stabilize it and prevent excessive roll. In time, the inside and sometimes center connections are overstressed and pull away from their attachments. The first sign is usually heel pain as you rise in the morning. When you walk around, the pain may subside, only to return the next morning. Inflammation and increased soreness are the results of long-term neglect and continued abuse. A heel bone spur may develop after a long period of injury when there is no support for the heel. The plantar fascia attaches to the heel bone with small fibers. When these become irritated they become inflamed with blood containing white blood cells. Within the white blood cells are osteoblasts which calcify to form bone spurs and calcium deposits. The body is trying to reduce stress on that area by building a bone in the direction of stress. Unfortunately, these foreign substances cause pain and further irritation in the surrounding soft tissue.
Plantar fasciitis is caused by straining the ligament that supports your arch. Repeated strain can cause tiny tears in the ligament. These can lead to pain and swelling. This is more likely to happen if your feet roll inward too much when you walk ( excessive pronation ). You have high arches or flat feet. You walk, stand, or run for long periods of time, especially on hard surfaces. You are overweight. You wear shoes that don't fit well or are worn out. You have tight Achilles tendons or calf muscles.
Pain is the main symptom. This can be anywhere on the underside of your heel. However, commonly, one spot is found as the main source of pain. This is often about 4 cm forward from your heel, and may be tender to touch. The pain is often worst when you take your first steps on getting up in the morning, or after long periods of rest where no weight is placed on your foot. Gentle exercise may ease things a little as the day goes by, but a long walk or being on your feet for a long time often makes the pain worse. Resting your foot usually eases the pain. Sudden stretching of the sole of your foot may make the pain worse, for example, walking up stairs or on tiptoes. You may limp because of pain. Some people have plantar fasciitis in both feet at the same time.
A physical exam performed in the office along with the diagnostic studies as an x-ray. An MRI may also be required to rule out a stress fracture, or a tear of the plantar fascia. These are conditions that do not normally respond to common plantar fasciitis treatment.
Non Surgical Treatment
Night splints usually are designed to keep a person's ankle in a neutral position overnight. Most individuals naturally sleep with the feet plantar-flexed, a position that causes the plantar fascia to be in a foreshortened position. A night dorsiflexion splint allows passive stretching of the calf and the plantar fascia during sleep. Theoretically, it also allows any healing to take place while the plantar fascia is in an elongated position, thus creating less tension with the first step in the morning. A night splint can be molded from plaster or fiberglass casting material or may be a prefabricated, commercially produced plastic brace. Several studies have shown that use of night splints has resulted in improvement in approximately 80 percent of patients using night splints. Other studies found that night splints were especially useful in individuals who had symptoms of plantar fasciitis that had been present for more than 12 months. Night splints were cited as the best treatment by approximately one third of the patients with plantar fasciitis who tried them. Disadvantages of night splints include mild discomfort, which may interfere with the patient's or a bed partner's ability to sleep.
Plantar fasciotomy is often considered after conservative treatment has failed to resolve the issue after six months and is viewed as a last resort. Minimally invasive and endoscopic approaches to plantar fasciotomy exist but require a specialist who is familiar with certain equipment. Heel spur removal during plantar fasciotomy has not been found to improve the surgical outcome. Plantar heel pain may occur for multiple reasons and release of the lateral plantar nerve branch may be performed alongside the plantar fasciotomy in select cases. Possible complications of plantar fasciotomy include nerve injury, instability of the medial longitudinal arch of the foot, fracture of the calcaneus, prolonged recovery time, infection, rupture of the plantar fascia, and failure to improve the pain. Coblation (TOPAZ) surgery has recently been proposed as alternative surgical approaches for the treatment of recalcitrant plantar fasciitis.