Current status of zirconia used in total hip implants
| Autor: | Thomas Donaldson, Ian C. Clarke, Y.-h. Kim, Giuseppe Pezzotti, M. Manaka, Nobuhiko Sugano, D.D. Green, B. Ben Nissan, M. Ries, L. Sedel, C. Delauney, Paul Allen Williams, G. A. Gustafson |
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| Rok vydání: | 2003 |
| Předmět: |
medicine.medical_specialty
Ceramics Arthroplasty Replacement Hip Total hip replacement Dentistry Biocompatible Materials Zirconia ceramic Medicine Humans Orthopedics and Sports Medicine University medical Cubic zirconia Confusion Korea business.industry General Medicine United States Surgery Prosthesis Failure Orthopedics Zirconium Hip Prosthesis France History of use medicine.symptom business |
| Popis: | “Zirconia Ceramics or `By Night, All Cats Are Grey.'”1 This was the curious title given four years ago to a French study regarding the controversy over zirconia in total hip replacement. The authors of that study commented: “In the absence of rigorous scientific clarification, information on biomaterials is frequently a source of confusion and misleading generalisations worrying to orthopaedic surgeons.” Indeed, from their inception eighteen years ago, the performance of zirconia ceramic balls (Fig. 1) has been both confusing and controversial. Given the diversity of clinical results, it may well be true that not all zirconia balls were created equal. Thus, the above quotation appears as salient today as it was in 1999. A more recent French study reinforced this opinion: Hamadouche et al. noted that they could find only two studies that demonstrated favorable clinical results with the use of zirconia balls2. The literature published by major ceramic companies has also noted that certain clinical groups found higher rates of osteolysis with the zirconia-ultra-high molecular weight polyethylene couple3,4. How was this possible after an eighteen-year history of use of zirconia implants, with more than 400,000 zirconia implants reportedly sold worldwide5,6? Fig. 1 Retrieved ceramic balls at Loma Linda University Medical Center. From left to right: alumina, black zirconia, and white zirconia. We must assume that the majority of implanted zirconia balls are performing very well today and that only a small percentage of patients have experienced some wear or other problems. However, it is imperative that we determine the mode and reason or reasons for the failures that have occurred. Thus, our collaborative goal was to determine the stability of zirconia balls following one to ten years of use in vivo and whether the reported variations in clinical results are … |
| Databáze: | OpenAIRE |
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