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Mnemonics, Simplified Concepts & Thoughts

Hawkin’s Classification for Talus Fractures : Mnemonic

Dr. Sulabh Kumar Shrestha, MS Orthopedics, Jun 28, 2022
hawkins classification talus
Drummond Filho ML, Verzani MA, Rosa AF, Pimenta CJ, Grynwald J, Cliquet Junior A. Fraturas do colo do talus: avaliação da reprodutibilidade da classificação de Hawkins. Acta Ortopédica Brasileira. 2012;20:170-3.

Mnemonic: NISA 10-50-90-100

Type I – Non-displaced Neck fracture (upto 10% risk of AVN)

  • 1 blood vessel damaged (entering talar neck)
  • Management: 8 weeks in cast and 4 weeks in CAM cast

Type II – Type I + Inferior (subtalar) subluxation/dislocation (upto 50% risk of AVN)

  • 2 blood vessels damaged
  • Management: Immediate closed reduction and management as type I

Type III – Type II + Superior (tibiotalar) subluxation/dislocation (90% risk of AVN)

  • 3 (all sources) blood vessels damaged
  • Management: ORIF using combined anterolateral and anteromedial approach

Type IV – Type III + Anterior (talonavicular) subluxation/dislocation (100% risk of AVN)

  • AVN not related to blood supply damage
  • Management: As type III
dr. sulabh kumar shrestha
Dr. Sulabh Kumar Shrestha, MS Orthopedics

He is the section editor of Orthopedics in Epomedicine. He searches for and share simpler ways to make complicated medical topics simple. He also loves writing poetry, listening and playing music.

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PGMEE, MRCS, USMLE, MBBS, MD/MS Musculoskeletal systemOrthopedics

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Shrestha SK. Hawkin’s Classification for Talus Fractures : Mnemonic [Internet]. Epomedicine; 2022 Jun 28 [cited 2025 May 9]. Available from: https://epomedicine.com/medical-students/hawkins-classification-for-talus-fractures-mnemonic/.

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