Abstract
Aim: The purpose of this study was to determine the long-term results of tibial tubercle osteotomy in a series of revision and difþcult primary total knee replacements. Method: A consecutive series of total knee replacements in which tibial tubercle osteotomy was performed were reviewed retrospectively. 18 revision knees and 5 primary knee replacements were identiþed. All of the operations performed were by the senior author. The technique was the same in all cases, involving 9cm osteotomy with screw þxation. In cases with marked restricted ßexion and patella baja, the tubercle was deliberately moved proximally to gain length in the extensor mechanism. In 3 revisions the index component had a porous in-growth stem. The osteotomy facilitated explantation. Results: All osteotomies had united by 8–12 weeks. Range of movement increased on average 45û in the revisions, and by 60û in the primaries. An active extensor lag in 4 cases (all deliberate proximalisations) post operatively which all recovered.5 patients underwent MUA for stiffness at 12 weeks. Conclusion: Tibial tubercle osteotomy allows predictable extensile exposure in primary and revision total knee replacement. It also allows lengthening of a contracted extensor mechanism. Union rate was excellent and complications low. It allows preservation of the quadriceps mechanism and a normal postoperative rehabilitation.
Theses abstracts were prepared by Professor Dr. Frantz Langlais. Correspondence should be addressed to him at EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.
