Clinical and radiographic assessment of a modular cementless ingrowth femoral stem system for revision hip arthroplasty.
This article presents 6-year mean (2-12-year) clinical and radiographic follow-up of 62 proximally porous-coated modular S-ROM femoral revisions. These patients come from 106 consecutive cases in 97 patients performed by one surgeon between 1987 and 1992 without structural allograft (femoral bone loss was Paprosky types 1-3B). In the 99 cases with known outcome, there were 7 postoperative complications: 2 dislocations (2%), 2 deep infections (2%), 2 periprosthetic femoral fractures (2%), and 1 transient sciatic nerve palsy (1%). There was only 1 revision of the index surgery for a problem related to the stem (dislocation). Of the 62 stems, 59 (95%) with complete follow-up were ingrown, 2 (3%) were loose, and 1 had stable fibrous fixation. This represents a mechanical failure rate of 5%. Stems greater than 16 mm in diameter were more likely to show stress shielding (P = .009) and not to be ingrown (P = .0006).
Walter
William L
WL
Sydney Hip & Knee Surgeons, Level 3, 100 Bay Road, Waverton, NSW 2060, Australia.
Walter
William K
WK
Zicat
Bernard
B
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005269:Femur; D005500:Follow-Up Studies; D006621:Hip Joint / Q000000981:diagnostic imaging* / Q000601:surgery*; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D011859:Radiography; D012086:Reoperation