title: Slope on proximal tibiofibular articular surface with 3-D reconstruction by 64-slice computed tomography on human.
abstract: OBJECTIVE
  Using 64-slice spiral CT to reconstruct virtual knee joints of adults, we measured the gradient of proximal tibia-fibular joint and compared this result with bare joint measurement. We then discuss the accuracy of these measurements using a 64-slice spiral CT.
  
  
  METHODS
  Two hundred healthy adults were selected, including 100 males and 100 females, aged from 18 to 90 years. The gradient of the longitudinal axis of the fibula and the articular surface, and the angle of horizon of the proximal tibia-fibular articular surface and the horizontal line were measured by using a 64-slice spiral CT scan.
  
  
  RESULTS
  The angle between the longitudinal axis of the fibula and the articular surface (angle A) was 56.80° ± 6.59°, both the left and the right fibula showed no significant difference (t = 0.308, P = 0.758). The angle between horizontal line and the articular surface (angle B) was 32.80° ± 6.49°. The regression or correlation analysis findings showed that there is a negative relationship (r = -0.952, P = 0.000), and there is significant difference (t = 51.87, P < 0.01) between the angle A and the angle B.
  
  
  CONCLUSIONS
  The measurement value of using 64-slice spiral CT to reconstruct the slope of proximal tibia-fibular joints has no difference compared to the measurement value of the slope of bare proximal tibia-fibular joints. It is a precise, convenient method and is easy to apply for clinical study.
authors.affiliation: Department of Orthopaedics, Shanghai Xuhui Central Hospital, Shanghai, China.
authors.forename: Yin-wang
authors.initials: YW
authors.lastname: Zhang
authors.forename: Hong-zhen
authors.initials: HZ
authors.lastname: Deng
authors.forename: Hai-bo
authors.initials: HB
authors.lastname: Zhu
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhu
authors.forename: Jian-ming
authors.initials: JM
authors.lastname: Zhu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005360:Fibula / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000592:standards*; D021621:Imaging, Three-Dimensional / Q000592:standards*; D007719:Knee Joint / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D013977:Tibia / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D036542:Tomography, Spiral Computed / Q000295:instrumentation / Q000379:methods*; D055815:Young Adult