alexa The cone hip stem: a prospective study of 13 patients followed for 5 years with RSA.
Orthopaedics

Orthopaedics

Journal of Arthritis

Author(s): Strm H, Mallmin H, Milbrink J, PetrnMallmin M, Nivbrant B,

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Abstract We operated on 13 patients (14 hips) with dysplastic hips, mean age 42 (28-58) years, with a cementless Cone stem and followed them for 5 years, using the Merle d'Aubigné clinical score, conventional radiography and repeated radiostereometry analyses. The clinical scores improved markedly at 4 months and still more throughout the study. None of the patients complained of thigh pain. No stem showed radiographic subsidence, but 3 stems had radiolucent zones probably indicating fibrous ingrowth. Micromigration was measured at 4 months, 1, 2 and 5 years. The mean subsidence after 5 years was 0.27 mm and the mean posterior micromigration of the head was 0.74 mm. Most of the micromigration took place within the first 4 months. We conclude that the uncemented Cone stem used in dysplastic hips has shown a good clinical outcome so far and was found to be stable on conventional radiographs and using RSA technique. This article was published in Acta Orthop Scand and referenced in Journal of Arthritis

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