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[Malalignment of the tibia--comparative investigation of three stabilization procedures by clinical analysis and
1Klinik für Unfallchirurgie, Universitätsklinikum Schleswig-Holstein, Campus Kiel. beschl@unfchir.uni-kiel.de
Introduction:
Malalignment after osteosynthetic stabilization of lower leg fractures is still a common problem for trauma surgeons. The aim of the present study was to evaluate the incidence of torsional and varus- or valgus-malalignment of the lower leg subsequent to osteosynthetic stabilization techniques such as reamed nailing, unreamed nailing and tibial plating.
Methods:
70 patients with 73 fractures of the lower leg were included in the study. The fractures were treated consecutively in 37 cases with an unreamed nail (UTN), in 21 cases with a reamed nail and 15 cases were stabilized with a plate. During clinical follow-up after 5.7 years each patient was analyzed for malalignment of the lower leg with a CT-Scan and a dual-energy X-ray absorptiometry (DXA) analysis.
Results:
Multi-level CT-scans revealed a significant rotational malalignment in 16.4 % of patients. Interestingly, all misaligned cases were treated with a nail (9.6 % UTN, 6.8 % reamed nail). Varus- or valgus-malalignment was detected in 5.4 % of cases all of whom had been treated with an intramedullary nail.
Conclusions:
Malalignment is still a common problem after osteosynthetic stabilization of lower leg fractures, whereby the majority of these cases can be expected after intramedullary nailing. Rotational malalignment can be detected by CT-Scans, whereas DXA analysis is a reliable procedure to diagnose varus- or valgus-malalignment after osteosynthetic stabilization of lower leg fractures.