Mid-term migration of a cemented total hip replacement assessed by radiostereometric analysis

J. Alfaro-Adrian, H. S. Gill, B. E. Marks, D. W. Murray

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25 Citations (Scopus)

Abstract

We have previously reported the short-term migration of cemented Hinek femoral components using radiostereometric analysis (RSA). We now report the mid-term migration. During the first 2 years after implantation the prosthesis subsided into varus and rotated internally. Between years 3 and 8 the prosthesis continued to rotate internally with the head moving posteriorly (0.07 mm/year, P=0.004). It also continued to fall into varus with the tip moving laterally (0.07 mm/year, P=0.04). The head (0.06 mm/year, P2 SD from the mean). We have demonstrated that a cemented implant has slow but significant levels of migration and rotation for at least 8 years after implantation. Our study confirms that implants with abnormally rapid posterior head migration during the second year are likely to fail.
Original languageEnglish
Pages (from-to)140-144
Number of pages5
JournalInternational Orthopaedics
Volume23
Issue number3
DOIs
Publication statusPublished - 1999

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