Nomenclature of equine hoof measurements – a systematic literature review
Authors: L. Sellke, B. Patan-Zugaj, K. Witter
Journal: Pferdeheilkunde Equine Medicine
Summary
# Editorial Summary Sellke, Patan-Zugaj and Witter conducted a systematic review of over 600 equine hoof-related publications and five key handbooks to map the nomenclature used across the scientific literature, identifying 80 distances, 24 angles, 34 ratios and 16 other measurement types currently in use. The caudal angle of the hoof wall (commonly termed hoof angle, dorsal hoof wall angle, or toe angle) emerged as the most problematically inconsistent measurement, with 12 different English and German terms used across 49 publications, whilst sole length, dorsal hoof wall depth, and the plantar angle of the distal phalanx each showed 16–17 different terms for essentially the same measurement. Only heel length demonstrated consistent terminology across the reviewed literature (12 identical terms in 12 entries), highlighting a widespread lack of standardisation that could lead to misinterpretation of findings across studies. The authors recommend that all practitioners and researchers explicitly define each measurement using correct anatomical terminology alongside detailed illustrations, maintain consistent terminology within research groups, and adopt the standardised 15-term glossary provided for English and German-language publications. This standardisation is essential for reliable communication amongst equine professionals—from research interpretation to clinical assessment of conformation changes and therapeutic outcomes—ensuring that hoof measurements can be meaningfully compared across studies and professional boundaries.
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Practical Takeaways
- •When reading hoof measurement studies or comparing data between publications, verify the exact anatomical definition of each measurement term used, as identical terms may refer to different structures and vice versa
- •Adopt the recommended standardized terminology provided in this paper when documenting hoof measurements in your own records and publications to enable meaningful comparison with other practitioners and studies
- •Always include detailed anatomical descriptions and reference figures when documenting hoof measurements to ensure clarity and prevent misinterpretation by other professionals
Key Findings
- •A systematic review of over 600 scientific papers identified 80 distances, 24 angles, 34 ratios, and 16 other hoof measurements with highly inconsistent nomenclature across publications
- •The caudal angle between dorsal hoof wall and ground line had 49 different entries using 10 English and 2 German terms, representing the most nomenclatural confusion
- •Three measures showed highly inconsistent terminology: sole surface length (16 terms for 25 entries), distance to Phalanx distalis (17 terms for 28 entries), and caudal angle at sole margin (17 terms for 30 entries)
- •Heel length demonstrated the most consistent nomenclature with 12 identical terms across all references, and recommendations for standardized English and German terminology were provided for 15 commonly used measurements