期刊
JOURNAL OF BONE AND JOINT SURGERY-BRITISH VOLUME
卷 93B, 期 9, 页码 1217-1222出版社
BRITISH EDITORIAL SOC BONE JOINT SURGERY
DOI: 10.1302/0301-620X.93B9.26573
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资金
- Johnson and Johnson Professional Inc., Raynham, Massachusetts
Correct positioning and alignment of components during primary total knee replacement (TKR) is widely accepted to be an important predictor of patient satisfaction and implant durability. This retrospective study reports the effect of the post-operative mechanical axis of the lower limb in the coronal plane on implant survival following primary TKR. A total of 501 TKRs in 396 patients were divided into an aligned group with a neutral mechanical axis (+/- 30 degrees) and a malaligned group where the mechanical axis deviated from neutral by > 30 degrees. At 15 years' follow-up, 33 of 458 (7.2%) TKRs were revised for aseptic loosening. Kaplan-Meier survival analysis showed a weak tendency towards improved survival with restoration of a neutral mechanical axis, but this did not reach statistical significance (p = 0.47). We found that the relationship between survival of a primary TKR and mechanical axis alignment is weaker than that described in a number of previous reports.
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