Discussion on Dorsal Bunion

What is Dorsal bunion  ?

Deformity where DF of Ist MT head , PF of great toe

Exostosis form on dorsum of Ist MT head

MTP joint may even subluxate

Plantar part of joint capsule and FHB may contract.

Types

Weak Peroneus Longus , Strong TA

Paralysis of all muscle except triceps surae and long toe flexors which are strong leading to PF of great toe .

FHB adds to effect .

Along with Hllaux Rigidus and Flat foot .

How to treat dorsal bunion ?

Flexible

Correct muscle imbalance between ankle motors

If rigidus

Do Lapidus procedure

      Double breasting of capsule of Ist MTP joint

Capsule release on plantar aspect

TA transfer to 2^nd , 3^rd cuneiform

FHL transfer to Ist MT base through a tunnel passing from plantar to dorsal aspect so FHL acts as a DF of Ist MT