Tibial plateau fractures-Does non anatomic reduction lead to an adverse outcome? A 10-year follow-up.

Purpose: Assess the effect of residual intra-articular step and limb alignment on the outcomes of operated tibial plateau fractures.

Methods: After retrospectively enrolling 123 cases of operated tibial plateau fracture whole limb weight bearing X-rays of both knees and computed tomography scan was done to record the presence of knee osteoarthritis (OA), alignment and articular step. The Rasmussen functional score (RFS) and Visual Analogue scale (VAS) score was calculated. Depending on the articular step there were four groups, group A (no step), group B (<2 mm), group C (2 mm-5 mm) and group D (6 mm-10 mm). The patients were also divided into 3 groups based on knee alignment, group 1 (0-10° valgus angle), group 2 (varus angle upto 5°) and group 3 (varus angle of 5-15°).

Results: Group A had 53, group B 31, group C 23 and group D 16 cases. The mean follow up was 10.23 years. The difference in the RFS/VAS score and OA rate amongst the 4 groups based on articular step had a P>0.05. Based on knee alignment RFS and OA rate amongst three groups had a P<0.05 with better results in group 1.

Conclusions: Mal-alignment is a more important predictor of outcome in operated tibial plateau fractures than articular step.