The purpose of this study was to follow up a cohort of South African doctors who had previously failed a validated musculoskeletal assessment tool, to examine the effect of a two-month Orthopaedic internship rotation on musculoskeletal competency. A validated competency examination in orthopaedic medicine was used as the assessment tool. Topics included fractures and dislocations, arthritis, basic anatomy and emergencies that require immediate referral to an orthopaedic surgeon. The questionnaire consists of twenty-five short-answer questions. A validated answer key and scoring system were used to mark the questionnaire. In a previous study, we found that 91 per cent of South African doctors in our study group, at the start of their internship, failed to demonstrate basic competency on the examination. We concluded that medical school preparation in orthopaedic medicine in South Africa is inadequate. We reapplied the examination at the end of 2011 to a study group of seventy-six first and second-year interns, to assess whether a two-month orthopaedic rotation during internship had a significant effect on musculoskeletal competency.Purpose
Methods
We reviewed the outcome of prosthesis-to-bone fixation of the rough titanium femoral stem of an Ultraloc prosthesis (Zimmer, USA). Between 1989 and 1991, 41 of 55 patients were traced for long-term review at a mean of 107 months (55 to 139). The primary pathology was avascular necrosis in 18 patients, osteoarthritis in 16, ankylosing spondylitis in two and Perthes’ disease in one, and there were two cases each of trauma and dysplasia. There was an equal number of men and women, whose mean age at operation was 47 years (24 to 66). Radiological assessment of the stems revealed well-fixed stems in 40 patients (97.6%). In 20 stems small granulomata due to polyethylene wear were found in Gruen zones 1 and 7, and in one stem in zones 1, 6 and 7. Only one stem required revision for loosening (done at 59 months), but cups (48.8%) were loose. Three patients required revision owing to polyethylene wear and one for sepsis. In all four cases, removal of the stem was extremely difficult. The remaining 16 hips await revision. Although the results obtained using an Ultraloc prosthesis are poor, from the point of view of fixation the stem has functioned successfully. However, the formation of granulomata causes cup loosening.
We evaluate the results of total hip arthroplasty using either a porous-coated or a hydroxyapatite (HA) coated femoral component. For a prospective trial we selected a cohort of young patients with a mean age of 39 (19 to 56). They were randomly selected to have either a one-third porous-coated or one-third HA-coated uncemented femoral component. One of two experienced hip surgeons performed the operations. Within the constraints of pathology, the approach and surgical technique was the same in all the cases. Patients were followed-up clinically and radiologically for a mean period of 102 months (87 to 113). To date there have been no revisions. All components have remained well fixed and there is no evidence of progressive subsidence. We found no significant difference between porous-coated or HA-coated stems.
