First metatarsal declination angle
Last revised by Henry Knipe on 2 Feb 2022
Citation, DOI, disclosures and article data
Citation:
Knipe H, First metatarsal declination angle. Reference article, Radiopaedia.org (Accessed on 25 Apr 2024) https://doi.org/10.53347/rID-96993
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rID:
96993
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Disclosures:
At the time the article was created Henry Knipe had no recorded disclosures.
View Henry Knipe's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Henry Knipe had no recorded disclosures.
View Henry Knipe's current disclosures
Revisions:
2 times, by
1 contributor -
see full revision history and disclosures
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Synonyms:
- MT-1-declination angle
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
References
- 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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