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J Arthroplasty. 2014 Apr;29(4):727-32. doi: 10.1016/j.arth.2013.09.020. Epub 2013 Nov 1.

The protective effect of pulsed lavage against implant subsidence and micromotion for cemented tibial unicompartmental knee components: an experimental cadaver study.

Author information

1
Laboratory of Biomechanics and Implant Research, Clinic for Orthopedics and Trauma Surgery, Heidelberg University Hospital, Heidelberg, Germany.
2
Department of Medical Biometry, Institute of Medical Biometry and Informatics, University of Heidelberg, Heidelberg, Germany.
3
Laboratory of Biomechanics and Implant Research, Clinic for Orthopedics and Trauma Surgery, Heidelberg University Hospital, Heidelberg, Germany; Vulpius Hospital for Orthopaedic Surgery Bad Rappenau, Rappenau, Germany.

Abstract

Cemented UKAs were performed in 12 pairs of human cadaver legs and the bone bed was cleansed using pulsed lavage (group A) and conventional syringe lavage (group B). Subsidence and micromotion of the loaded tibial trays were measured. There was a significant effect of BMD on subsidence (P = 0.043) but not on micromotion. Cement penetration of group A was significantly increased (P = 0.005). Group A showed a reduced implant subsidence (P = 0.025) and micromotion (P = 0.026) compared to group B. The group differences in micromotion and implant subsidence of UKA tibial components were statistically significant but rather small and might clinically be of minor importance. Nevertheless a worse bone quality adversely affected implant subsidence and pulsed lavage had a protective effect in these specimens.

KEYWORDS:

BMD; cement penetration; implant subsidence; micromotion; pulsed lavage; unicompartmental

PMID:
24184324
DOI:
10.1016/j.arth.2013.09.020
[Indexed for MEDLINE]

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