title: Midterm results in metal-backed patella revisions for metallosis.
abstract: Nine patients underwent isolated patellar revisions and synovectomies for metallosis secondary to the mechanical failure of metal-backed patellar components. These patients were followed for an average of 5 years (range, 2 to 8 years). In all cases, the femoral and tibial components were left in place, and in one patient the patellar bone was deemed too thin to resurface. Two patients (22%) developed deep infection. One infection (enterococcal) required arthrodesis, and the other (staphylococcal) was successfully managed with a two-staged reimplantation. A third patient sustained an inferior patella pole fracture that was treated conservatively. The remaining six patients are functioning satisfactorily. Metallosis is a serious complication in knee arthroplasty, and these patients merit close follow-up.
authors.affiliation: Joint Replacement Center, Richmond, Virginia, USA.
authors.forename: J
authors.initials: J
authors.lastname: Arredondo
authors.forename: R L
authors.initials: RL
authors.lastname: Worland
authors.forename: D E
authors.initials: DE
authors.lastname: Jessup
authors.forename: F
authors.initials: F
authors.lastname: Angles
mesh_terms: D016983:Enterococcus; D005500:Follow-Up Studies; D005549:Foreign-Body Reaction / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D007720:Knee Prosthesis; D008670:Metals / Q000009:adverse effects*; D015915:Motion Therapy, Continuous Passive; D010329:Patella / Q000000981:diagnostic imaging / Q000601:surgery*; D011182:Postoperative Care; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000601:surgery*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D016459:Prosthesis-Related Infections / Q000000981:diagnostic imaging / Q000601:surgery*; D011859:Radiography; D012086:Reoperation; D013203:Staphylococcal Infections / Q000000981:diagnostic imaging / Q000601:surgery; D000074402:Synovectomy; D013583:Synovial Membrane / Q000000981:diagnostic imaging
chemical_list: D008670:Metals