[Two-Stage Reconstruction in Bony Finger Joint Defects - Long-Term Results].

Background: Bony defects in finger injuries and infections impose high demands on their treatment due to the close anatomic relationships. Ideally, the injuries are entirely treated in emergency care. Due to the mechanism of the accident, contaminated and compromised soft tissues are often present and set limits to single-stage treatment. We present the long-term subjective and functional results after two-stage reconstruction of bony finger joint defect injuries.

Patients and methods: Over a period of 15 years, a total of 40 patients with 43 fingers were treated due to a defect injury in the phalanges. Initially, the finger was stabilised with Kirschner wires after debridement. After consolidation of the soft tissue, the bone was reconstructed in a subsequent operation by interposition of an iliac crest graft. Complications occurred in 9 patients. Twenty-five patients with 27 fingers were followed up for 10.3 years. Range of motion, length of the affected finger, and grip force, each in relation to the contralateral extremity, were recorded. In addition to a subjective assessment of the global result, the daily function was determined by means of the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire.

Results: Significant differences compared with the contralateral extremity (p<0.05) were found in length (70 mm; 91.0%) and total mobility of the affected finger (95°; 46.0%), hand span when the thumb was involved (202.5 mm; 93.4%), and power grip when one of the fingers was injured (30 kg; 84.1%). The DASH score was 4.2 points (0-55.8). Subjectively, 88% of patients were satisfied with the treatment outcome.

Conclusion: In case of contaminated and compromised soft tissues, the two-stage treatment of bony defect injuries in finger joints by arthrodesis of the joint is a reliable treatment strategy. In the long run, it results in a very satisfactory function of the hand in everyday life although significant differences have been measured compared with the contralateral extremity.