Summary
Standardized X-ray documentation of the foot in two planes under weightbearing conditions is the mainstay of quantitative assessment of foot deformities. The combination of talo-first-metatarsal-angle in the lateral view and a second talo-first-metatarsalbase-angle that measures talonavicular alignment in the ap-view is presented as the TMT index in order to describe the amount of planovalgus deformity in children and adults. The index is derived from tarsometatarsal pathomorphology of this type of deformity. First results in different groups of well-aligned and planovalgus feet (n=70) are presented. The TMT index seems to be an appropriate simple tool to describe foot malalignment in planovalgus feet with a single measurement for practical and scientific work.
Zusammenfassung
Es wird ein einfach zu bestimmender Winkel- Index zur Erfassung der Planovalgus-Deformität bei älteren Kindern und Erwachsenen vorgestellt, der sich auf die Pathomorphologie dieser Fehlstellung gründet. Aus standardisierten Röntgenaufnahmen unter Belastung in zwei Ebenen werden der Talo-Metatarsale-I-Winkel im seitlichen Strahlengang und ein neu definierter Winkel von Talus und Metatarsale-I-Basis aus der ap-Aufnahme durch Addition zum TMT-Index zusammengefasst. An kleineren Gruppen nicht-deformierter und im Planovalgus-Sinne deformierter Füße (n=70) werden erste Ergebnisse vorgestellt. Der TMT-Index erscheint geeignet, das Ausmaß der skelettären Fehlstellung von Planovalgus-Deformitäten in einer einzigen Maßzahl zu beschreiben.
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Hamel, J., Kinast, C. Der TMT-Index zur radiologischen Quantifizierung von Planovalgus-Deformitäten. Fuss 4, 221–226 (2006). https://doi.org/10.1007/s10302-006-0244-y
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DOI: https://doi.org/10.1007/s10302-006-0244-y
Key words
- Planovalgus deformity
- posterior tibial tendon dysfunction
- tarsal alignment
- tarso-metatarsal deformity
- X-ray documentation