The aim of this study was to evaluate the efficacy of the surgical dislocation approach and modified trapdoor procedure for the treatment of chondroblastoma of the femoral head. A total of 17 patients (ten boys, seven girls; mean age 16.4 years (11 to 26)) diagnosed with chondroblastoma of the femoral head who underwent surgical dislocation of the hip joint, modified trapdoor procedure, curettage, and bone grafting were enrolled in this study and were followed-up for a mean of 35.9 months (12 to 76). Healing and any local recurrence were assessed via clinical and radiological tests. Functional outcome was evaluated using the Musculoskeletal Tumour Society scoring system (MSTS). Patterns of bone destruction were evaluated using the Lodwick classification. Secondary osteoarthritis was classified via radiological analysis following the Kellgren–Lawrence grading system. Steinberg classification was used to evaluate osteonecrosis of the femoral head.Aims
Patients and Methods
The purpose of this study was to evaluate the basic corrosion properties of conventional CoCr (ASTM F 1537, UNS R31537), Gas Atomized Dispersion Strengthened (GADS) CoCr (ASTM 1537, UNS R31539), Ti6Al4V ELI (ASTM F 136, UNS R56401) and Ti-12Mo-6Zr-2Fe (TMZF) (ASTM F 1813) alloys that are used in joint replacement applications. Test coupon samples made from alloys' wrought bar stocks were polished then tested. Each material had 4 groups (n33) that were tested in 4 aqueous solutions: 1) pH 7.4, 2) pH 5, 3) pH 2, and 4) pH 2 with 1 M of H2O2. Potential dynamic polarization was conducted using a Princeton Applied Research VMC Potentiostat, with an Ag/AgCl electrode as the reference electrode, and it resembled method in ASTM F 2129-08. The samples were evaluated with Scanning Electron Microscope (SEM).Introduction:
Methods:
