| Autor: |
Emans PJ; Department of Orthopaedic Surgery, Maastricht University Medical Centre, Maastricht - The Netherlands. pj.emans@orthop.unimaas.nl, Broeke RH, Van Mulken JM, Kuijer R, Van Rhijn LW, Geesink RG |
| Jazyk: |
angličtina |
| Zdroj: |
Hip international : the journal of clinical and experimental research on hip pathology and therapy [Hip Int] 2009 Oct-Dec; Vol. 19 (4), pp. 343-51. |
| DOI: |
10.1177/112070000901900408 |
| Abstrakt: |
We examined the hypothesis that the circumferential osseous apposition around HA-coated implants forms a protective barrier against articular wear debris. Sixty-five hydroxyapatite-coated total hip arthroplasties in 57 patients (age <50years) with polyethylene-metal articulation were evaluated regarding PE-wear, osteolysis, and clinical outcome at a minimum of 10 years follow-up. There was no correlation between PE-wear and osteolysis of the femoral zones or cup zones I and III. A strong Pearson correlation was found between polyethylene wear and osteolysis around cup zone II, where the cup only consisted of polyethylene (p<0,01). The aseptic failure rate was 1.5% for the femoral component and 4.5% for the cup after 10 years of follow-up. The average Harris Hip Score was 90 and the average Engh score for fixation was 23 after 10 years . Around HA-coated parts of the prosthesis bone formation remained stable, regardless of the degree of polyethylene wear. The average linear polyethylene wear was 0,16 mm/year. The circumferential osseous apposition of the HA-coated implants possibly formed a protective barrier against articular wear debris. The use of cups with a backside gap resulted in PE-wear associated osteolysis in cup zone II and may be considered to be best avoided. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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