Citation, DOI, disclosures and article data
Citation:
Knipe H, First metatarsal declination angle. Reference article, Radiopaedia.org (Accessed on 22 Mar 2023) https://doi.org/10.53347/rID-96993
The first metatarsal declination angle can be used to assess for metatarsus primus elevatus in hallux rigidus.
Measurement
The first metatarsal declination angle is formed between the longitudinal axis of the first metatarsal and the supporting surface 1-4.
Interpretation
- normal: 20-21° 1-4
- metatarsus primus elevatus in hallux rigidus: ~19.0° 2,3
- 1. Lau B, Allahabadi S, Palanca A, Oji D. Understanding Radiographic Measurements Used in Foot and Ankle Surgery. J Am Acad Orthop Surg. 2021;30(2):e139-54. doi:10.5435/jaaos-d-20-00189 - Pubmed
- 2. Jones M, Sanders A, DaCunha R et al. Assessment of Various Measurement Methods to Assess First Metatarsal Elevation in Hallux Rigidus. Foot & Ankle Orthopaedics. 2019;4(3):247301141987568. doi:10.1177/2473011419875686
- 3. Bouaicha S, Ehrmann C, Moor B, Maquieira G, Espinosa N. Radiographic Analysis of Metatarsus Primus Elevatus and Hallux Rigidus. Foot Ankle Int. 2010;31(9):807-14. doi:10.3113/fai.2010.0807 - Pubmed
- 4. Gentili A, Masih S, Yao L, Seeger L. Pictorial Review: Foot Axes and Angles. Br J Radiol. 1996;69(826):968-74. doi:10.1259/0007-1285-69-826-968 - Pubmed
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