alexa Hydroxyapatite augmentation of the porous coating improves fixation of tibial components. A randomised RSA study in 116 patients.
Orthopaedics

Orthopaedics

Journal of Arthritis

Author(s): Onsten I, Nordqvist A, Carlsson AS, Besjakov J, Shott S

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Abstract In a single-blind, randomised series of knee replacements in 116 patients, we used radiostereometric analysis (RSA) to measure micromotion in three types of tibial implant fixation for two years after knee replacement. We compared hydroxyapatite-augmented porous coating, porous coating, and cemented fixation of the same design of tibial component. At one to two years, porous-coated implants migrated at a statistically significantly higher rate than hydroxyapatite-augmented or cemented implants. There was no significant difference between hydroxyapatite-coated and cemented implants. We conclude that hydroxyapatite augmentation may offer a clinically relevant advantage over a simple porous coating for tibial component fixation, but is no better than cemented fixation.
This article was published in J Bone Joint Surg Br and referenced in Journal of Arthritis

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