• Zhan-le Zheng, Yi-Yang Yu, Heng-Rui Chang, Huan Liu, Hui-Lin Zhou, and Ying-Ze Zhang.
• Department of Orthopaedic Trauma Center, Key Biomechanics Lab of Hebei Province, The Third Hospital of Hebei Medical University, Shijiazhuang, China.
• Orthop Surg. 2019 Feb 1; 11 (1): 97-101.

ObjectiveThe purpose of this retrospective study was to determine the incidence of fibular fractures as an associated injury in tibial plateau fractures according to CT scan. We also attempt to introduce a new morphological sub-classification on this associated injury and to analyze the correlation between this classification and tibial plateau fractures.MethodsWe selected cases with fibular fractures from all the tibial plateau fracture patients. The cases were further divided into 2 groups: unicondylar group and bicondylar group. On the basis of our new classification system of fibular fracture, all the included cases were divided into 5 subgroups.ResultsFinally, a total of 150 cases associated with fibular fractures in 502 tibial plateau fracture cases were identified from our institution database. The incidence of fibular head fracture in tibial plateau fractures was 29.88% (150/502). Seventy-one cases (47.3%) were involved one condyle, and 79 cases (52.7%) involved both. It shows significant difference in the subgroup of avulsion fracture with horizontal fracture line (Type A) which is ratio of 16.9% in unicondylar group and 1.27% in bicondylar group.ConclusionA new classification of this associated injury describing the morphology of the fracture fragments may improve operative planning.© 2019 The Authors. Orthopaedic Surgery published by Chinese Orthopaedic Association and John Wiley & Sons Australia, Ltd.

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