RESEARCH - Knee arthroplasty in the young patient: survival in a community registry

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Clin Orthop Relat Res. 2007 Nov;464:83-7.

Knee arthroplasty in the young patient: survival in a community registry.

Gioe TJ, Novak C, Sinner P, Ma W, Mehle S.

St Orthopaedic Specialists, St , MN, USA.

Operative options for the younger patient with an arthritic knee

remain controversial. We prospectively followed 1047 patients 55 years

old or younger who underwent knee arthroplasty in a community joint

registry over a 14-year period. Patients were implanted with 1047

joints of three predominant designs by 48 surgeons in four hospitals

associated with a community joint registry. The mean age for this

cohort was 49.8 years, and 62.8% (657/1047) of the patients were

female. There were a total of 73 revisions performed, 5.6% (37/653) in

women and 9.2% (36/394) in men. Cemented TKAs performed best, with a

cumulative revision rate of 15.5%, compared to 32.3% in

unicompartmental knee arthroplasty (UKA) patients and 34.1% in

cementless designs. Men had a higher cumulative revision rate than

women, 31.9% compared to 20.6%. Adjusting for implant type and gender,

there was no difference in cumulative revision rate based on diagnosis

(OA versus other) or age group (< or = 40, 41-45, 46-50, 51-55 years)

or between cruciate-retaining and -substituting designs.

Eighty five percent of cemented TKA implants survived at 14 years in

the population under 55 years of age in this community registry.

Cementless designs and UKA increased revision risk independently.

LEVEL OF EVIDENCE: Level II, therapeutic study. See the Guidelines for

Authors for a complete description of levels of evidence.

PMID: 17589362

http://www.ncbi.nlm.nih.gov/pubmed/17589362

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