Tibial plateau fractures with and without meniscus tear--results of a standardized treatment protocol.

OBJECTIVES The purpose of this study was to determine what patient and injury factors are associated with the presence of a meniscus tear in tibial plateau fractures. We also sought to compare functional outcome, pain scores, and range of motion between patient groups with and without meniscal injury. MATERIALS AND METHODS A total of 99 patients with 101 acute tibial plateau fractures were included in the study cohort. Patients were divided into two groups: those with and without meniscus tears at the time of initial injury. Statistical analysis with Student's t-test for continuous variables and chi square test for categorical variables was performed to compare those with and without a meniscal tear. Logistic regression was performed to identify the variables that predicted the presence of a meniscus tear and repeated ANOVA measures were used to assess functional outcome scores. RESULTS Fifty-four patients with 56 tibial plateau fractures (55%) were found to have an associated meniscal tear. The average amount of joint depression in this group was 12.3 mm (range: 2.0 to 29.5 mm). The remaining 45 patients with 45 fractures (45%) had an average depression of 5.4 mm (range: 0.0 to 12.8 mm). Degree of tibial plateau depression was the only significant predictor of meniscal injury. CONCLUSIONS Our findings suggest that amount of depression in tibial plateau fractures is a significant predictor of the occurrence of a meniscus tear with an odds ratio of 1.36. We also found no significant difference in the functional outcome, pain scores, and knee range of motion between the group with and without meniscus tears at the longest follow-up interval. These findings suggest that acute repair of meniscal injury following traumatic fracture of the tibial plateau could produce functional results similar to those patients that did not sustain a meniscus tear.