Treatment
Medical Therapy
Nonoperative treatment focuses on relieving the pressure under the tip of the toe. This can be accomplished with extra-depth toe-box footwear. Soft orthoses or toe protectors are useful.
Surgical Therapy
Surgical therapy includes flexor tenotomy, possibly including plantar capsular release and pinning; condylectomy and fusion of the middle to distal phalanx; and, occasionally, partial or complete amputation of the distal phalanx.
A flexible mallet toe is best treated with the flexor tenotomy. A fixed deformity requires a condylectomy. An ulcerated or infected toe would do best with a terminal Syme amputation.5
Preoperative Details
Surgery can be performed under local or regional block, and in appropriate patients, it can be performed on an outpatient or day-surgery basis.
Intraoperative Details
Local anesthesia and tourniquet control are used.
Tenotomy is performed by making a small lateral or medial incision over the distal end of the middle phalanx. The author prefers to visualize the tendon sheath directly by retracting the skin with double skin hooks or a Ragnell. The sheath is incised longitudinally, and the tendon is hooked with a small arthroscopic probe. The tendon then can be divided under direct vision. If some residual contracture is present, the plantar capsule can be stripped of the phalanx with a freer dissector. A 1.1 Kirschner wire (K-wire) can be used to immobilize the joint in the neutral position.6 One skin stitch or Steri-Strip is used to close.
Distal interphalangeal (DIP) joint fusion is carried out by excising a small ellipse over the dorsal aspect of the joint, including the extensor. The bone ends are excised, and pinning is carried out. The skin and extensor are closed in one layer.
Amputation is usually performed as a terminal Syme procedure. The nail bed and the terminal half of the phalanx are excised.
Postoperative Details
Routine dressings are applied. Sutures are removed at 10-14 days. Pins are usually removed at 4 weeks.
Follow-up
The patient can mobilize weight bearing in a postoperative shoe. Elevating the limb for the first 5-7 days reduces postoperative swelling.
Complications
Recurrence is possible, especially if associated joint lesions at the metatarsophalangeal (MTP) joint (eg, hyperextension) are not appreciated. Failure to completely divide the flexor can also cause recurrence. Flail toe, if excessive resection has occurred, is occasionally a problem with shoes or stockings, but it is seldom painful. Neurovascular problems, including numbness, neuromata, and dysvascularity, can also occur. Prolonged swelling is often noted, and patients should be warned beforehand that this may occur. Residual nail deformity is also common. Hyperextension deformity of the distal interphalangeal (DIP) joint and flexion deformity of the proximal interphalangeal (PIP) joint can also occur.
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References
Cooper PS. Disorders and Deformities of the Lesser Toes. In: Myerson MS, ed. Foot and Ankle Disorders. Philadelphia, Pa: WB Saunders; 2000:321-322.
Coughlin MJ. Mallet toes, hammer toes, claw toes, and corns. Causes and treatment of lesser-toe deformities. Postgrad Med. Apr 1984;75(5):191-8. [Medline].
Lancaster SC, Sizensky JA, Young CC. Acute mallet toe. Clin J Sport Med. May 2008;18(3):298-9. [Medline].
Schuh A, Hönle W. [Deformities of the smaller toes]. MMW Fortschr Med. Feb 21 2008;150(8):37, 39. [Medline].
Coughlin MJ. Operative repair of the mallet toe deformity. Foot Ankle Int. Mar 1995;16(3):109-16. [Medline].
Nakamura S. Temporary Kirschner wire fixation for a mallet toe of the hallux. J Orthop Sci. Mar 2007;12(2):190-2. [Medline].
Further Reading
A mallet toe is a fixed or flexible deformity of the distal interphalangeal (DIP) joint of the toe.
Related eMedicine topics:
Claw Toe
Hammertoe Deformity
Keywords
mallet toe, toe pain, toe callus, mallet toe deformity, hammertoe deformity, claw toe, toe deformity, diabetic foot, diabetic foot, clavus
Treatment: Mallet Toe