title: The development of a model for in vitro testing of femoral stems in impaction bone grafting.
abstract: Comprehension of the biomechanical behaviour of orthopaedic implants is essential. This paper describes the development of an in vitro model to investigate the behaviour of femoral implants in the revision setting. The development of a femoral model and a bone graft substitute is described. The properties of human, bovine, ovine morselized bone graft, and a graft substitute were compared. On measuring hoop strain after impaction bone grafting there was no significant difference between the ovine bone graft and graft substitute with the size 1 Exeter stem. The results suggest that this bone graft substitute is a viable alternative for in vitro testing. The authors recommend the use of the graft substitute and the femoral model to predict femoral stem biomechanics.
authors.affiliation: Department of Orthopaedics, University of Bristol, Bristol, UK. jsheal@doctors.org.uk
authors.forename: J S
authors.initials: JS
authors.lastname: Heal
authors.forename: C
authors.initials: C
authors.lastname: Gozzard
authors.forename: S
authors.initials: S
authors.lastname: Gheduzzi
authors.forename: B
authors.initials: B
authors.lastname: Grimm
authors.forename: I D
authors.initials: ID
authors.lastname: Learmonth
authors.forename: A W
authors.initials: AW
authors.lastname: Miles
mesh_terms: D018786:Bone Substitutes / Q000627:therapeutic use*; D016025:Bone Transplantation / Q000379:methods*; D019245:Compressive Strength; D003198:Computer Simulation; D004548:Elasticity; D005270:Femur Head / Q000503:physiopathology* / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D008954:Models, Biological; D011379:Prognosis; D013314:Stress, Mechanical
chemical_list: D018786:Bone Substitutes