Background: This study was initiated to evaluate early results of a locked screw plate for unilateral fixation of bicondylar fractures of the tibial plateau. Emphasis was laid on malreduction, secondary loss of reduction, union rate, and infection.
Material and methods: A case series of patients with AO/ASIF 41-C type fractures treated with the less invasive stabilization system for the proximal lateral tibia (LISS PLT) were prospectively followed up until 11-13 months after surgery. Malreduction and malalignment were defined as an intra-articular step-off of 2 mm or more or as a malalignment in the frontal or sagittal plane of more than 5 degrees.
Results: Sixty-eight patients with 69 fractures were involved. Fourteen fractures were open. Primary bone grafting was performed in 13 patients. Significant malreduction was seen in 16 patients. Sixty-two (91%) patients returned for follow-up. All but one fracture healed eventually. The number of infections was low (4 superficial, 1 deep). Nine patients had a significant loss of reduction. Of 54 patients outcome scores were good to excellent in 47 patients on the Lysholm score (average 87.2) and in 44 patients on the Rasmussen score (average 26.7).
Conclusion: We concluded that unilateral locked screw plating is a good alternative in the treatment of problematic fractures of the tibial plateau that are associated with soft tissue damage and metaphyseal comminution. The reduction technique for exact alignment is demanding.