title: Prediction of the repair surface over cartilage defects: a comparison of three methods in a sheep model.
abstract: Defects in articular cartilage can be repaired through osteochondral transplantation (mosaic arthroplasty), where osteochondral plugs from non-weight-bearing areas of the joint are transferred to the defect site. Incongruity between the plug surface and the adjacent cartilage results in increased contact pressures and poorer outcomes. We compare three methods to predict the desired repair surface for use in computer-assisted mosaic arthroplasty: manual estimation, a cubic spline surface, and a statistical shape atlas of the knee. The cubic spline was found to most accurately match the pre-impact cartilage surface; the atlas was found to match least accurately.
authors.affiliation: School of Computing, Department of Materials and Mechanical Engineering, Queen's University, Kingston, ON, Canada.
authors.forename: Manuela
authors.initials: M
authors.lastname: Kunz
authors.forename: Steven
authors.initials: S
authors.lastname: Devlin
authors.forename: Ren Hui
authors.initials: RH
authors.lastname: Gong
authors.forename: Jiro
authors.initials: J
authors.lastname: Inoue
authors.forename: Stephen D
authors.initials: SD
authors.lastname: Waldman
authors.forename: Mark
authors.initials: M
authors.lastname: Hurtig
authors.forename: Purang
authors.initials: P
authors.lastname: Abolmaesumi
authors.forename: James
authors.initials: J
authors.lastname: Stewart
mesh_terms: D000818:Animals; D003198:Computer Simulation; D050724:Fractures, Cartilage / Q000000981:diagnostic imaging* / Q000601:surgery*; D066298:In Vitro Techniques; D008954:Models, Biological; D011379:Prognosis; D019651:Plastic Surgery Procedures / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012756:Sheep; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*; D016896:Treatment Outcome