title: [Measurement of bone tunnel width with computed tomography versus plain radiography after anterior cruciate ligament single-bundle reconstruction].
abstract: OBJECTIVE
  To compare the measurements of bone tunnel width with computed tomography (CT) and plain radiography two years after anterior cruciate ligament single-bundle reconstruction.
  
  
  METHODS
  Twenty patients underwent primary anterior cruciate ligament single-bundle reconstruction with hamstring autografts. There were 10 females and 10 males. Tibial and femoral bone tunnel widths were measured with CT and plain radiography at least two years post-operation. The average follow-up period was 26 months (range, 24-31). The tunnel measurements were taken at the widest point of tibial and femoral tunnels on sagittal and coronal CT and plain radiography perpendicularly to the longitudinal axis of tunnels. All data were statistically analyzed.
  
  
  RESULTS
  The tibial tunnel width of one case decreased on CT while all others increased. The average tibial tunnel width on coronal plain radiography was 0.9 ± 0.6 mm (range, 0.3-2.2) larger than that on CT. And the average width on sagittal plain radiography was 0.9 ± 0.5 mm (range, 0.1-2.1) larger than that on CT. Both were statistically significant. All femoral tunnel widths increased, except in 2 cases. The average femoral tunnel widths on coronal and sagittal plain radiography were both significantly larger than those on CT. And the difference were 0.7 ± 0.6 mm (range, 0-1.7) and 0.9 ± 0.7 mm (range, 0.1-2.7) respectively.
  
  
  CONCLUSIONS
  Bone tunnel measurements on plain radiography are significantly larger than those on CT after anterior cruciate ligament reconstruction.
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Hai-jun
authors.initials: HJ
authors.lastname: Wang
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Ying-fang
authors.initials: YF
authors.lastname: Ao
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Lian-xu
authors.initials: LX
authors.lastname: Chen
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Gong
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Yong-jian
authors.initials: YJ
authors.lastname: Wang
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.affiliation: Institute of Sports Medicine, Peking University Third Hospital, Beijing 100191, China. Email: yujiakuo@126.com.
authors.forename: Jia-kuo
authors.initials: JK
authors.lastname: Yu
mesh_terms: D000293:Adolescent; D000328:Adult; D059549:Anterior Cruciate Ligament Reconstruction / Q000379:methods*; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D013977:Tibia / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed; D055815:Young Adult