Ligamentäre Strecksehnenausrisse am Endgelenk: Operative Indikationen und Techniken

[Temporarily Transfixation of the distal interphalangeal Joint in Mallet fingers]

PURPOSE

This retrospective, unicenter cohort study analyse the clinical and subjective results following temporarily K-wire transfixation of the distal interphalangeal joint (DIPJ) in hyperextension in Mallet fingers.

PATIENTS AND METHODS

By means of a self-designed questionnaire demographic data, patient´s satisfaction (0 = unsatisfied, 10 = very satisfied), persisting pain (yes/no), postoperative complications, and the Quick-DASH score were evaluated. In addition, range of motion of the DIPJ was measured with use of a self-designed template for self-evaluation by the patients. Questionnaire and template were send to 132 patients in whom a Mallet finger was treated between January 2009 and December 2019 with K-wire transfixation of the DIPJ. 65 (49,2 %) questionnaires and templates from 40 men and 25 women with an average age of 53.3 years returned. There were 40 acute and 25 chronic Mallet fingers in 35 (54 %) middle, 19 (29 %) small, 10 (15 %) ring, and 1 (2 %) index fingers. The extension deficit was classified according to Crawford.

RESULTS

According to the Crawford classification, there were 75 % excellent, 14 % good, and 11 % satisfied results. With an average of 7,9 points the patients were very satisfied. 15 patients reported about complications with six complaining persisting pain. The Quick-DASH score averaged 5.4 points.

CONCLUSION

The treatment of Mallet fingers by transfixation of the DIPJ using a K-wire is an appropriate method leading to a good.

A new technique for repair of acute or chronic extensor tendon injuries in zone 1

We describe a new surgical technique for the treatment of lacerations of the extensor tendon in zone I, which involves a tenodesis using a length of palmaris longus tendon one-quarter of its width. After exposing the dorsal aspect of the distal interphalangeal joint and harvesting the tendon, a 1.5 mm drill bit is passed through the insertion of the extensor tendon into the distal phalanx where it penetrates through the skin of the pulp of the digit. The palmaris longus tendon is threaded through the drill hole from dorsal to ventral and the ventral end is tied in a simple knot and trimmed. The palmaris longus tendon is then sutured to the extensor tendon close to its insertion, and also at the middle of the middle phalanx.

The operation was undertaken on 67 patients: 27 with an acute injury and 40 patients with a chronic mallet deformity. One finger (or the thumb) was involved in each patient. At a mean follow-up of 12 months (6 to 18), 66 patients (98.5%) received excellent or good results according to both the American Society for Surgery of the Hand (ASSH) classification and Miller’s classification.

Tenodesis using palmaris longus tendon after complete division of an extensor tendon in zone 1 is a reliable form of treatment for isolated acute or chronic ruptures.