A LOCKED KNEE IN EXTENSION: A COMPLICATION OF A DEGENERATE KNEE WITH PATELLA ALTA

T. G. McWilliams; M. S. Binns

doi:10.1302/0301-620X.82B6.0820890

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A LOCKED KNEE IN EXTENSION: A COMPLICATION OF A DEGENERATE KNEE WITH PATELLA ALTA

T. G. McWilliams
M. S. Binns

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A LOCKED KNEE IN EXTENSION: A COMPLICATION OF A DEGENERATE KNEE WITH PATELLA ALTA

McWilliams TG, Binns MS. A LOCKED KNEE IN EXTENSION: A COMPLICATION OF A DEGENERATE KNEE WITH PATELLA ALTA. J Bone Joint Surg Br. 2000;82-B(6):890-890. doi:10.1302/0301-620X.82B6.0820890

McWilliams, T. G., and M. S. Binns. “A LOCKED KNEE IN EXTENSION: A COMPLICATION OF A DEGENERATE KNEE WITH PATELLA ALTA.” The Journal of Bone & Joint Surgery British Volume, vol. 82-B, no. 6, 2000, pp. 890-890., https://doi.org/10.1302/0301-620X.82B6.0820890

McWilliams, T. G., & Binns, M. S. (2000). A LOCKED KNEE IN EXTENSION: A COMPLICATION OF A DEGENERATE KNEE WITH PATELLA ALTA. The Journal of Bone & Joint Surgery British Volume, 82-B(6), 890-890. https://doi.org/10.1302/0301-620X.82B6.0820890

McWilliams, T. G. and Binns, M. S. (2000) “A LOCKED KNEE IN EXTENSION: A COMPLICATION OF A DEGENERATE KNEE WITH PATELLA ALTA.” The Journal of Bone & Joint Surgery British Volume, 82-B(6), pp. 890-890. Available at: https://doi.org/10.1302/0301-620X.82B6.0820890

McWilliams, T. G., and M. S. Binns. “A LOCKED KNEE IN EXTENSION: A COMPLICATION OF A DEGENERATE KNEE WITH PATELLA ALTA.” The Journal of Bone & Joint Surgery British Volume 82-B, no. 6 (2000): 890-890. https://doi.org/10.1302/0301-620X.82B6.0820890

McWilliams TG, Binns MS. A LOCKED KNEE IN EXTENSION: A COMPLICATION OF A DEGENERATE KNEE WITH PATELLA ALTA. J Bone Joint Surg Br. 2000 Aug 1;82-B(6):890-890. https://doi.org/10.1302/0301-620X.82B6.0820890

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Abstract

We present a case of superior dislocation of the patella trapped by interlocked osteophytes. Unlike previous reports, in which the mechanism resulted from a blow to the inferior pole, it is postulated that increased load on the extensor mechanism, combined with patella alta and patellofemoral osteophytes, caused locking of the knee in extension.

Correspondence should be sent to Mr T. G. McWilliams at 2 Crawshaw Villa, Crawshaw Road, Pudsey, West Yorkshire LS28 7UB, UK.

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