The Exter Universal Stem. A minimum ten-year review from an independent centre.

S. Hook, E. Moulder, Piers Yates, B.J. Burston, E. Whitley, G.C. Bannister

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    We reviewed 142 consecutive primary total hip replacements implanted into 123 patients between 1988 and 1993 using the Exeter Universal femoral stem. A total of 74 patients (88 hips) had survived for ten years or more and were reviewed at a mean of 12.7 years (10 to 17). There was no loss to follow-up.The rate of revision of the femoral component for aseptic loosening and osteolysis was 1.1% (1 stem), that for revision for any cause was 2.2% (2 stems), and for re-operation for any cause was 21.6% (19 hips). Re-operation was because of failure of the acetabular component in all but two hips.All but one femoral component subsided within the cement mantle to a mean of 1.52 mm (0 to 8.3) at the final follow-up. One further stem had subsided excessively (8 mm) and had lucent lines at the cement-stem and cement-bone interfaces. This was classified as a radiological failure and is awaiting revision. One stem was revised for deep infection and one for excessive peri-articular osteolysis. Defects of the cement mantle (Barrack grade C and D) were found in 28% of stems (25 hips), associated with increased subsidence (p = 0.01), but were not associated with endosteal lysis or failure.Peri-articular osteolysis was significantly related to the degree of polyethylene wear (p <0.001), which was in turn associated with a younger age (p = 0.01) and male gender (p <0.001).The use of the Exeter metal-backed acetabular component was a notable failure with 12 of 32 hips (37.5%) revised for loosening. The Harris-Galante components failed with excessive wear, osteolysis and dislocation with 15% revised (5 of 33 hips). Only one of 23 hips with a cemented Elite component (4%) was revised for loosening and osteolysis.Our findings show that the Exeter Universal stem implanted outside the originating centre has excellent medium-term results.
    Original languageEnglish
    Pages (from-to)1584-1590
    JournalThe Journal of Bone and Joint Surgery: British Volume
    Issue number12
    Publication statusPublished - 2006

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