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  • Title: The long-term efficacy of unicompartmental arthroplasty of the knee.
    Author: Stockelman RE, Pohl KP.
    Journal: Clin Orthop Relat Res; 1991 Oct; (271):88-95. PubMed ID: 1914318.
    Abstract:
    In a retrospective study of 48 consecutive patients (63 knees) treated by a medial unicompartmental arthroplasty for degenerative arthritis, all of the operations were performed by a single surgeon. Only Compartmental II femoral prostheses were used, coupled with either a Robert Brigham or Compartmental II tibial prosthesis that was greater than 6 mm in thickness. All components were cemented. Forty-four knees were available for follow-up examination that was performed five to 12 years postoperatively (mean, 7.4 years) by one examiner. There were 43 satisfactory results (89.6% of knees), one fair (2.1%), and four revisions (8.3%). Two knees (4.5%) had roentgenographic evidence of disease progression. Valgus alignment did not appear necessary for a satisfactory result, although most knees were within 4 degrees of neutral. Unicompartmental knee arthroplasty is indicated in properly selected patients. When properly performed, this procedure should last longer than five years.
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