[Elastic titanium nails for minimally invasive intramedullary splinting of metacarpal fractures].

AIM: The goal in treatment of metacarpal fractures is to restore the normal function of the hand. Although a majority of these fractures can be treated non-operatively, surgery is recommended for displaced fractures and in case of a patient wish for primary stability for practise. A poor clinical outcome is described for metacarpal shortening of more than 5 millimeters and for rotational deformity. Whereas plate osteosynthesis may lead to soft tissue irritation involving tendon adhesions and scar formation, we have used the elastic stable intramedullary nailing [ESIN] technique using titanium elastic nails (TEN) for intramedullary splinting of short metacarpal shaft and neck fractures.

METHOD: Within 5 years, ESIN was performed in 95 patients. The operative technique was evaluated retrospectively concerning its functional results and complications.

RESULTS: Sixty-three patients were analysed after an average follow-up of 14.0 ± 5.2 weeks. The mean DASH-Score was 2.3 ± 3.9 points. We saw one implant out-of-position and three cases of skin irritation affording TEN shortening. Two superficial wound infections were treated conservatively. Pseudarthrosis and nail breakage were not observed. After TEN removal 9 ± 2.4 weeks post implantationem no refracture occurred.

CONCLUSION: Minimally invasive intramedullary stabilisation of short metacarpal shaft and neck fractures with a TEN is a safe surgical technique and achieves primary stability for practise. It reliably leads to fracture healing and produces excellent functional results.