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2015.07.08
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カテゴリ:カテゴリ未分類

Overview
Hammertoes is a deformity of the toe in which the toe bends downward at the middle joint, causing it to resemble a hammer. Hammertoes usually begin as mild problems, but over time they can develop into severe cases. Hammertoes are often flexible during the initial stages, and if treatment is administered promptly, symptoms can be managed with non-surgical methods. But if time passes and you do not seek treatment, your hammertoe will become more rigid, and surgical treatment may be required.

Causes
Many disorders can affect the joints in the toes, causing pain and preventing the foot from functioning as it should. A mallet toe occurs when the joint at the end of the toe cannot straighten. Excessive rubbing of the mallet toe against the top of the shoe can lead to pain and the development of a corn. The tip of the toe is often turned down against the shoe causing pressure and discomfort. Arthritis can also lead to many forefoot deformities including mallet toes. Mallet toes can cause extreme discomfort, and can be aggravated if restrictive or improperly fitting footwear is worn for a prolonged period of time.

Symptoms
A hammer toe may be painful, especially when irritated by a shoe. All four toe conditions may cause cramps in the toes, foot and leg due to the abnormal function of the tendons in the foot. If a mallet toe has occurred, you are likely to suffer from a corn at the end of the toe. A hammertoe may cause a corn on the top of the toe. Infections and ulcers can also occur. In severe cases a mallet toe, trigger toe, claw toe or a hammer toe may create a downward pressure on the foot, which can result in hard skin and corns on the soles of the feet.

Diagnosis
The exam may reveal a toe in which the near bone of the toe (proximal phalanx) is angled upward and the middle bone of the toe points in the opposite direction (plantar flexed). Toes may appear crooked or rotated. The involved joint may be painful when moved, or stiff. There may be areas of thickened skin (corns or calluses) on top of or between the toes, a callus may also be observed at the tip of the affected toe beneath the toenail. An attempt to passively correct the deformity will help elucidate the best treatment option as the examiner determines whether the toe is still flexible or not. It is advisable to assess palpable pulses, since their presence is associated with a good prognosis for healing after surgery. X-rays will demonstrate the contractures of the involved joints, as well as possible arthritic changes and bone enlargements (exostoses, spurs). X-rays of the involved foot are usually performed in a weight-bearing position.

Non Surgical Treatment
Conservative treatment starts with new shoes that have soft, roomy toe boxes. Shoes should be one-half inch longer than your longest toe. (Note: For many people, the second toe is longer than the big toe.) Avoid wearing tight, narrow, high-heeled shoes. You may also be able to find a shoe with a deep toe box that accommodates the hammer toe. Or, a shoe specialist (Pedorthist) may be able to stretch the toe box so that it bulges out around the toe. Sandals may help, as long as they do not pinch or rub other areas of the foot.

Surgical Treatment
Surgery is the approach that is often necessary to correct hammertoe that fails to respond to nonsurgical management. Surgery is appropriate when the muscles and tendons involved in a hammertoe problem have become so tight that the joints are rigid, misaligned and unmovable. There are a number of surgical techniques for dealing with the complex range of joint, bone, muscle, tendon and ligament abnormalities that define each hammertoe's make-up. To correct a hammertoe deformity, the surgeon's goal is to restore the normal alignment of the toe joint, relieving the pressure that led to the hammertoe's development (this should also relieve the pain, as well). To do this, he or she may remove part of the boney structure that creates a prominence at the top of the joint. Tighten or loosen the muscles, tendons and ligaments around the toe joints. Realign the toe bones by cutting one or more and shifting their position, realigning muscles, tendons and ligaments accordingly. Use screws, wires or plates to hold the joint surfaces together until they heal. Reconstruct a badly damaged joint or replace it with an artificial implant.

Prevention
In addition to wearing proper shoes and socks, walking often and properly can prevent foot injury and pain. The head should be erect, the back straight, and the arms relaxed and swinging freely at the side. Step out on the heel, move forward with the weight on the outside of the foot, and complete the step by pushing off the big toe. Exercises specifically for the toe and feet are easy to perform and help strengthen them and keep them flexible. Helpful exercises include the following. Raise and curl the toes 10 times, holding each position for a count of five. Put a rubber band around both big toes and pull the feet away from each other. Count to five. Repeat 10 times. Pick up a towel with the toes. Repeat five times. Pump the foot up and down to stretch the calf and shin muscles. Perform for 2 or 3 minutes.






最終更新日  2015.07.08 18:18:13
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