The bony surgery procedures were stratified into instrument fixation, prosthesis application, bone biopsy or excision, and bone-grafting or other bone plastic procedures, and surgical interventions in the spinal area were further classified as anterior or posterior-lateral fusion procedures.
This unique collaboration of the Nordic national orthopedic databases is now functional, with three countries participating so far, and it has shown that there are differences between the countries concerning demographics, prosthesis fixation, prosthesis survival, and revision patterns.
These mathematical formulations have been implemented in finite element code to predict the bone behaviour when an artificial fixation or prosthesis is implanted.
Patients with multi-fragmented fractures will be randomized to conservative, plate fixation, or prosthesis groups.
During the removal of the prostheses, it appeared that all femoral components of the failed CKS group were easy to remove, leaving an intact cement layer on the bones indicating inadequate fixation between prosthesis and cement.
With means for better mechanical stability and fixation, custom prostheses have improved our capabilities in salvaging failed total ankle replacements.
These are mainly used in the fixation of prostheses and filling bone cavities and kyphoplasty treatments [ 164].
Until now, research on fixation of prostheses by adjuvant PTH administration has been confined to experimental rodent settings with pathological low bone density (Shirota et al. 2003, Gabet et al. 2006) or involving transcortical screw insertion (Skripitz et al. 2000b, Skripitz and Aspenberg 2001b).
Variables in the LROI database that were checked for validity were sex, date of birth, hospital patient number, encrypted personal identity number, diagnosis, ASA score, type of prosthesis, fixation, cemented component (in cases of hybrid fixation), product number of component and cement, type of revision, revised component, and conversion to THA or conversion to total knee arthroplasty (TKA).
On top of that, the 2 published RSA-based RCTs on cemented knee prosthesis fixation with and without a tourniquet found no difference in fixation whether or not the tourniquet had been inflated (Ledin et al. 2012 (1++), Molt et al. 2014 (1++)).
Cox multiple regression, with adjustment for age, sex, and type of fixation of the prosthesis was used to calculate the survival of the prostheses and the relative revision risks.
