Overview
Patients and doctors often refer to all forms of toe abnormalities as a hammertoe. There are in fact four main forms of toe abnormalities, hammer toes, claw toes, mallet toes and trigger toes. A hammertoe can be best described as an abnormal contraction or “buckling” of a toe. This occurs due to a partial or complete dislocation of one of the joints that form the toe. As the toe continues to be deformed, it will press up against the shoe and may cause corns.
Causes
The muscles of each toe work in pairs. When the toe muscles get out of balance, a hammer toe can form. Muscle imbalance puts a lot of pressure on the toe’s tendons and joints. This pressure forces the toe into a hammerhead shape. How do the toe muscles get out of balance? There are three main reasons. Your genes, you may have inherited a tendency to develop hammer toes because your foot is slightly unstable – such as a flat foot. But high-arched feet can also get hammer toes. Arthritis. Injury to the toe: ill-fitting shoes are the main culprits of this cause. If shoes are too tight, too short, or too pointy, they push the toes out of balance. Pointy, high-heeled shoes put particularly severe pressure on the toes.
Symptoms
The middle joint of the toe is bent. The end part of the toe bends down into a claw-like deformity. At first, you may be able to move and straighten the toe. Over time, you will no longer be able to move the toe. It will be painful. A Hammer toe corn often forms on the top of the toe. A callus is found on the sole of the foot. Walking or wearing shoes can be painful.
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
There are many non-surgical treatments to help relieve symptoms of hammertoe. The first step for many people is wearing the right size and type of shoe. Low-heeled shoes with a boxy or roomy toe area are helpful. Cushioned insoles, customized orthopedic inserts, and pads can provided relief as well. Splints or straps may be used to help correct toe position. Your doctor may show you toe stretches and exercises to perform. Your doctor can safely remove corns and calluses. You should not try to remove them at home.
Surgical Treatment
Bone-mending procedures realign the contracted toe by removing the entire deviated small joints of the toe (again, not at the ball of the foot). This allows for the buckled joint to be positioned flat and the bone ends to mend together. Often surgical hardware (fixation) is necessary to keep the bones steady during healing. Hardware options can involve a buried implant inside the toe, or a temporary wire that is removed at a later date. Medical terminology for this procedure is called a proximal interphalangeal joint arthrodesis (fusion), or a distal interphalangeal joint arthrodesis (fusion), with the former being performed in a high majority of cases.
Alba Tooman 