title: 0.25 mm calibration and its impact on bone tunnel surface area in anterior cruciate ligament reconstruction with hamstrings. Preliminary report.
abstract: BACKGROUND
  We evaluated the clinical possibility of using 0.25 mm calibration and its effect on bone tunnel surface areas of varied length in comparison to the standardized graft calibration by every 0.5 mm in case of ACL reconstruction with hamstrings.
  
  
  METHODS
  The ACL reconstruction with hamstrings were done in 30 patients aged 18 to 28 years.The inclusion criteria were the graft diameter between 7-8.5 mm with its calibration by every 0.5 mm. and the length of the femoral tunnel minimum 4 cm. The calculation of surface area of a bone tunnels length ranging from 2.5 to 5 cm was done.
  
  
  RESULTS
  0.25 mm decrease in bone-tunnel diameter was possible in 56.7% of cases and decreased tunnel surface area of 3.4% in relation to primary value of graft diameter calibrated by every 0.5 mm, irrespective of its length. 0.5 cm change of bone tunnel length from 2.5 cm to 5 cm results in surface area increase of 17% (3 cm), 37.5% (4 cm) and 50% (5 cm) respectively, regardless of calibration rate.
  
  
  CONCLUSIONS
  0.25 mm reduction of bone tunnel diameter in relation to graft one calibrated by every 0.5 mm changes its surface area of 3.4%, regardless of tunnel length within range of 2.5-5 cm. Change of tunnel length from 2.5 to 3, 4 and 5 cm increase surface area by 17, 38 and 50% respectively, regardless of its diameter within range of 6.75-8.5 mm with 0.25 mm calibration rate. The 0.25 mm bone tunnel calibration should be a standard option in ACL reconstruction with hamstrings.
authors.affiliation: Department of Arthroscopy, Minimally Invasive Surgery and Sport Traumatology, Medical University of Łódź, Łódź, Poland. fabis@onet.eu
authors.forename: Jarosław
authors.initials: J
authors.lastname: Fabiś
authors.forename: Jerzy
authors.initials: J
authors.lastname: Białecki
authors.forename: Anna
authors.initials: A
authors.lastname: Fabiś
mesh_terms: D000328:Adult; D016118:Anterior Cruciate Ligament / Q000033:anatomy & histology* / Q000601:surgery*; D059549:Anterior Cruciate Ligament Reconstruction / Q000379:methods*; D001696:Biomechanical Phenomena; D001698:Biomedical Engineering; D001830:Body Surface Area; D002138:Calibration; D005260:Female; D006801:Humans; D008297:Male; D016059:Range of Motion, Articular; D013710:Tendons / Q000637:transplantation*; D055815:Young Adult