Is there evidence for accelerated polyethylene wear in uncemented compared to cemented acetabular components? A systematic review of the literature

Joint arthroplasty registries show an increased rate of aseptic loosening in uncemented acetabular components as compared to cemented acetabular components. Since loosening is associated with particulate wear debris, we postulated that uncemented acetabular components demonstrate a higher polyethylene wear rate than cemented acetabular components in total hip arthroplasty. We performed a systematic review of the peer-reviewed literature, comparing the wear rate in uncemented and cemented acetabular components in total hip arthroplasty. Studies were identified using MEDLINE (PubMed), EMBASE and the Cochrane Central Register of Controlled Trials. Study quality was assessed using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. The search resulted in 425 papers. After excluding duplicates and selection based on title and abstracts, nine studies were found eligible for further analysis: two randomised controlled trials, and seven observational studies. One randomised controlled trial found a higher polyethylene wear rate in uncemented acetabular components, while the other found no differences. Three out of seven observational studies showed a higher polyethylene wear in uncemented acetabular component fixation; the other four studies did not show any differences in wear rates. The available evidence suggests that a higher annual wear rate may be encountered in uncemented acetabular components as compared to cemented components

Assessment of asymmetric leg loading before and after total hip arthroplasty using instrumented shoes

Contains fulltext : 127669.pdf (publisher's version ) (Open Access)BACKGROUND: Total hip arthroplasty is a successful surgical treatment in patients with osteoarthritis of the hip. Different questionnaires are used by the clinicians to assess functional capacity and the patient's pain, despite these questionnaires are known to be subjective. Furthermore, many studies agree that kinematic and kinetic parameters are crucial to evaluate and to provide useful information about the patient's evolution for clinicians and rehabilitation specialists. However, these quantities can currently only be obtained in a fully equipped gait laboratory. Instrumented shoes can quantify gait velocity, kinetic, kinematic and symmetry parameters. The aim of this study was to investigate whether the instrumented shoes is a sufficiently sensitive instrument to show differences in mobility performance before and after total hip arthroplasty. METHODS: In this study, patients undergoing total hip arthroplasty were measured before and 6-8 months after total hip arthroplasty. Both measurement sessions include 2 functional mobility tasks while the subject was wearing instrumented shoes. Before each measurement the Harris Hip Score and the Traditional Western Ontario and McMaster Universities osteoarthritis index were administered as well. RESULTS: The stance time and the average vertical ground reaction force measured with the instrumented shoes during walking, and their symmetry index, showed significant differences before and after total hip arthroplasty. However, the data obtained with the sit to stand test did not reveal this improvement after surgery. CONCLUSIONS: Our results show that inter-limb asymmetry during a walking activity can be evaluated with the instrumented shoes before and after total hip arthroplasty in an outpatient clinical setting

Long-term results after laparoscopic Thal procedure in children

As the laparoscopic approach to gastroesophageal reflux disease (GERD) was introduced in pediatric surgery in the last decade of the 20th century, it became apparent that this approach was beneficial. The favorable results have led to a more general acceptance and implementation of this type of surgery at the beginning of the 21st century. We give an overview of the first decade of laparoscopic antireflux procedures in children with an emphasis on the laparoscopic Thal fundoplication and its implication on morbidity and cure of GERD in the long term both for normal and mentally handicapped children. Between 1993 and 2002, 149 children with GERD underwent 157 laparoscopic antireflux procedures, of whom 48% were mentally handicapped. Follow-up ranged from 6 months to 9 years (median age 4.5 years). Nineteen children died. All but one were not related to the antireflux procedure. Immediate relief of symptoms occurred in 120 children (80.5%). In 29 children, the results were less than optimal. Eight patients underwent a laparoscopic redo procedure (5.4%). However, none of the children with a follow-up of more than 5 years show any symptoms anymore. In conclusion, the laparoscopic Thal fundoplication is a safe procedure, and results in the long term are favorable, irrespective of the nature of the cause, ie, mental retardatio