title: [Correlation between morphogical factor of lateral plateau fracture and meniscus injury].
abstract: OBJECTIVE
  To analyze morphological character of lateral tibial plateau fracture fragment, and its correlation to the presence of a meniscus injury in tibial plateau fractures.
  
  
  METHODS
  A total of 79 consecutive patients of the simple lateral tibial plateau fractures from July 2011 to July 2015 were included in this study, with 65 males and 14 females with an average age of (34.3±7.2) years and 22-61 years. According to Schatzker classification, 21 cases were of Type I, 41 cases Type II, and 17 cases Type III. The characteristics of lateral tibial plateau fractures were evaluated by plain X-ray and magnetic resonance imaging (MRI). The type and severity of meniscus injury were diagnosed by MRI scan. Three-dimensional measurements of the lateral fragment width (LFW), the lateral plateau depression (LPD), the coronal angulation of lateral fragment (CALF), and tibial plateau widening (TPW) were measured with Picture Archiving and Communication Systems(PACS) software. The patients with and without meniscus injuries were divided into different groups and analyzed respectively. Comparison of the above measurements between the two groups was analyzed by independent t test.
  
  
  RESULTS
  In all the 79 lateral tibial plateau fracture patients, 26 cases (32.9%) of meniscus injuries were detected by MRI. Among all the meniscus injury cases, 3 were of Schatzker I, 16 Schatzker II, and 7 Schatzker III. In meniscus intact group, the average LFW was (22.0±2.8) mm while in meniscus injury group it was (21.3± 3.3) mm (t=-1.008, P=0.317).The average LPD of non meniscus injury group was (5.4±2.8) mm, while in meniscus injury group was (8.7±2.8) mm (t=4.98, P=0.001). The average CALF of the two groups were 9.1°±6.1°and 10.6°± 7.1°, and there was no significant difference between the two groups (t=0.38, P=0.831). The average TPW was (3.0± 1.1) mm, and (4.8±1.7) mm of the two groups. There were significant differences between the two groups (t=5.216, P=0.001).
  
  
  CONCLUSIONS
  There was no obvious correlation between the LFD and meniscus injury. The CALF of lateral tibial plateau fracture had no significant correlation with meniscus injury either. The degree of LPD and TPW may indicate injury of the meniscus in tibial plateau fractures.
authors.affiliation: Department of Sports Medicine, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong, China.
authors.forename: L
authors.initials: L
authors.lastname: Bai
authors.affiliation: Department of Radiology, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong, China.
authors.forename: W
authors.initials: W
authors.lastname: Zhou
authors.affiliation: Department of Sports Medicine, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong, China.
authors.forename: W T
authors.initials: WT
authors.lastname: Zhang
authors.affiliation: Department of Sports Medicine, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong, China.
authors.forename: W
authors.initials: W
authors.lastname: Huang
authors.affiliation: Department of Sports Medicine, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong, China.
authors.forename: T
authors.initials: T
authors.lastname: You
authors.affiliation: Department of Sports Medicine, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong, China.
authors.forename: P
authors.initials: P
authors.lastname: Chen
authors.affiliation: Department of Sports Medicine, Peking University Shenzhen Hospital, Shenzhen 518036, Guangdong, China.
authors.forename: H L
authors.initials: HL
authors.lastname: Zhang
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D008297:Male; D000072600:Meniscus / Q000000981:diagnostic imaging / Q000293:injuries*; D013977:Tibia / Q000000981:diagnostic imaging; D013978:Tibial Fractures / Q000000981:diagnostic imaging*