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I am new to this forum and have a question regarding simple biomechanical terminology. When referring to Cavovarus foot type, as well as pes plano valgus, is it describing the frontal plane deformity (varus of valgus) at the STJ in resting or neutral calcaneal stance position? its my understanding that a rearfoot can be everted due pronation or due to an inherent calcaneal valgus deformity, or both I guess


another example: forefoot valgus often accompanies cavovarus deformity. does this mean forefoot valgus determined by the resting calcaneal stance position or valgus FF to RF when the STJ is in neutral with MTJ maximally pronated? these terms often confuse me. thanks everyone!

 

By me..

Cavus it's a radiografic lateral plane examination that discriminate this (anterior,posterior,mixed).
Planus more or less the same...Costa-Bertani angle rules... http://innofoot.ibv.org/index.php/en/biomechanical-assessment-procedures/548-internal-moreau-costa-bertani-angle

Varus and valgus' calcaneal deformities are normaly related to the tibial angle (opened kinetic chain).

many times in Italy orthopedics, especially in children feet, call a normal arch height foot with important pronation pes planus...I figure that's wrong.

Hope this could be usefull.

fabio