In Vivo MicroCT Monitoring of Osteomyelitis in a XXXX Model.

@entity604 @entity794 @entity281 @entity12316 @entity35
Infection associated with orthopedic implants often results in @entity604 and requires surgical removal of the implant. The aim of this study was to evaluate morphological changes of bone adjacent to a bacteria-colonized implant, with the aim of identifying temporal patterns that are characteristic of @entity281 . In an in vivo study with @entity35 , bone changes were assessed using in vivo microCT at 7 time points during a one-month postoperative period. The @entity35 received either a sterile or @entity794 -colonized @entity12316 screw in the tibia. Bone-implant contact, bone fraction, and bone changes (quiescent, resorbed, and new bone) were calculated from consecutive scans and validated against histomorphometry. The screw pullout strength was estimated from FE models and the results were validated against mechanical testing. In the sterile group, bone-implant contact, bone fraction, and mechanical fixation increased steadily until day 14 and then plateaued. In the infected group, they decreased rapidly. Bone formation was reduced while resorption was increased, with maximum effects observed within 6 days. In summary, the model presented is capable of evaluating the patterns of bone changes due to implant-related @entity281 . The combined use of longitudinal in vivo microCT imaging and image-based finite element analysis provides characteristic signs of @entity281 within 6 days.
