title: [Femoral press-fit fixation in anterior cruciate ligament reconstruction: postoperative histological examination of bone block incorporation in pigs].
abstract: BACKGROUND
  The histological properties of the femoral press-fit fixation in anterior cruciate ligament reconstruction have not been extensively examined. The purpose of the study was to analyse the histological properties of the bone-patellar tendon graft in the bone tunnel area during the early stages of healing in an animal model. Furthermore the authors wanted to draw conclusions for the postoperative rehabilitation program on the basis of their data.
  
  
  METHODS
  ACL reconstruction was performed in pigs using femoral press-fit fixation. After 3 and 6 weeks the incorporation of the bone block in the femur in 2 pigs was histological and radiological evaluated.
  
  
  RESULTS
  After 3 and 6 weeks the examination showed almost similar histology on the bony side the grafts except (1) a higher amount of fibrotic tissue in-between the lamellae of the inserted patellar bone after 6 weeks, (2) the presence of direct osseous unions between the two lamellar systems and (3) thicker lamellae at the base than toward the condylar tissue.
  
  
  CONCLUSIONS
  Concerning the progression of graft healing by histological findings our study showed, that after 6 weeks the femoral press-fit fixation appear to have good incorporation after ACL reconstruction.
authors.affiliation: Országos Sportegészségügyi Intézet, Sportsebészeti Osztály. peterhidas@hotmail.com
authors.forename: Péter
authors.initials: P
authors.lastname: Hidas
authors.forename: György
authors.initials: G
authors.lastname: Illyés
authors.forename: Attila
authors.initials: A
authors.lastname: Pavlik
authors.forename: Zsolt
authors.initials: Z
authors.lastname: Kendik
authors.forename: András
authors.initials: A
authors.lastname: Tállay
authors.forename: István
authors.initials: I
authors.lastname: Berkes
mesh_terms: D000818:Animals; D016118:Anterior Cruciate Ligament / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D001178:Arthroplasty / Q000379:methods*; D004195:Disease Models, Animal; D005269:Femur; D007719:Knee Joint / Q000473:pathology* / Q000503:physiopathology* / Q000601:surgery; D011184:Postoperative Period; D016059:Range of Motion, Articular; D013552:Swine; D014945:Wound Healing