The tibial slope in patients with achondroplasia: Its characterization and possible role in genu recurvatum development

Jaysson T. Brooks, David L. Bernholt, Kevin V. Tran, Michael Ain

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Genu recurvatum, a posterior resting position of the knee, is a common lower extremity deformity in patients with achondroplasia and has been thought to be secondary to ligamentous laxity. To the best of our knowledge, the role of the tibial slope has not been investigated, and no studies describe the tibial slope in patients with achondroplasia. Our goals were to characterize the tibial slope in children and adults with achondroplasia, explore its possible role in the development of genu recurvatum, and compare the tibial slope in patients with achondroplasia to that in the general population. Methods: We reviewed 252 lateral knee radiographs of 130 patients with achondroplasia seen at our clinic from November 2007 through September 2013. Patients were excluded if they had previous lower extremity surgery or radiographs with extreme rotation. We analyzed patient demographics and, on all radiographs, the tibial slope. We then compared the mean tibial slope to norms in the literature. Tibial slopes >90 degrees had an anterior tibial slope and received a positive prefix. Statistical analysis included intraclass and interclass reliability, Pearson correlation coefficient, and the Student t tests (significance, P

Original languageEnglish (US)
Pages (from-to)349-354
Number of pages6
JournalJournal of Pediatric Orthopaedics
Volume36
Issue number4
DOIs
StatePublished - 2016

Keywords

  • Achondroplasia
  • Dysplasia
  • FGFR-3
  • Genu recurvatum
  • Tibial slope

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Orthopedics and Sports Medicine

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