The Ring uncemented plastic-on-metal total hip replacement. Five-year results.
The Ring plastic-on-metal total hip replacement was introduced with the intention of combining the advantages of the cemented low-friction arthroplasty with those of a cementless system. Fourteen hundred and eighty-eight of these procedures have been reviewed. The results of a two to seven-year follow-up, and of a group which has completed at least five years are presented. There was an excellent clinical result in 93% of the whole series, and in 87% of the five-year group. When graded on the Charnley scale there was an average score of 5.86 for pain, 5.96 for function and 5.9 for range of movement, which compares favourably with cemented replacements. The deep infection rate was zero, and the revision rate 1.5% for the whole series. Erosive problems occurred with the smaller acetabular components and the reasons are discussed. The ease and success of exchange have been maintained.
Nunn
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Orthopaedic Research Unit, Redhill Hospital, Surrey, England.
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002484:Cementation; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000503:physiopathology / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008670:Metals; D008875:Middle Aged; D009068:Movement; D011095:Polyethylenes; D011474:Prosthesis Design
D008670:Metals; D011095:Polyethylenes