title: The early effects of intramedullary reaming of the femur on bone mineral density; an experimental study in pigs.
abstract: OBJECTIVE
  Both fracture and fracture treatment affect bone mineral density (BMD). BMD after standard intramedullary reaming of the femoral cavity and after reaming with a reamer-irrigator-aspirator (RIA) system were studied with the hypothesis that the RIA technique would lead to lower BMD levels.
  
  
  METHODS
  Dual-energy X-ray absorptiometry (DXA) was performed on the third day after operation with standard intramedullary nailing technique (n = 6) or RIA technique (n = 7) in intact femora of young Norwegian landrace pigs.
  
  
  CONCLUSIONS
  Significantly lower BMD were found in the mid-shaft and total femur after reaming with the RIA technique compared to the non-operated femur. Traditional reaming technique resulted in significantly higher BMD in the distal -femur.
  
  
  CONCLUSIONS
  The results of this study indicate that standard reaming increased BMD in the distal femur, suggesting compressive effects on trabecular bone. The RIA technique decreased BMD in the femoral diaphysis and total femur, suggesting removal of trabecular bone. A possible clinical impact of the findings remains to be investigated.
authors.affiliation: Orthopedic Centre, Oslo University Hospital, Ullevaal, Norway. i.e.ellingsen@medisin.uio.no
authors.forename: E
authors.initials: E
authors.lastname: Ellingsen Husebye
authors.forename: T
authors.initials: T
authors.lastname: Lyberg
authors.forename: J E
authors.initials: JE
authors.lastname: Madsen
authors.forename: L
authors.initials: L
authors.lastname: Nordsletten
authors.forename: O
authors.initials: O
authors.lastname: Røise
mesh_terms: D015502:Absorptiometry, Photon; D000818:Animals; D015519:Bone Density; D005269:Femur / Q000000981:diagnostic imaging / Q000502:physiology* / Q000601:surgery*; D005594:Fracture Fixation, Intramedullary / Q000379:methods*; D017102:Fracture Healing / Q000502:physiology; D013314:Stress, Mechanical; D013396:Suction; D013552:Swine; D007507:Therapeutic Irrigation; D013997:Time Factors