Tailor’s Burnion (Bunionette)



Tailor’s Burnion (Bunionette)





TAILOR’S BUNION (BUNIONETTE)


Description

Enlargement of, or prominence of, the 5th metatarsal head


Evaluation


IM Angle

Two Methods

1. Traditional method


The angle between the bisection of the 4th metatarsal and the bisection of the 5th metatarsal

Average normal value is 7°; higher values (8° to 10°) indicate an abnormality.

2. Fallat and Buckholz


The angle between the bisection of the 4th metatarsal and the medial cortical margin of the proximal portion of the 5th metatarsal

Average normal value is 7°; higher values (8° to 10°) indicate an abnormality.










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Lateral Deviation Angle

Bisection of the 5th metatarsal head and neck in relation to the medial cortical margin of the proximal portion of shaft

Average normal value is 3°; higher values (8°) indicate an abnormality.










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Classification










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Causes

Enlarged 5th metatarsal head or hypertrophied plantar condyles

Lateral bowing of the 5th metatarsal shaft

Increased 4th IM angle

Biomechanical


Cavus foot

Uncompensated rearfoot varus

Uncompensated forefoot varus

Splay foot

Metatarsus adductus

Forefoot valgus




Exostoses


Davis

Removal of the lateral eminence (reverse Silver)


Dickson and Dively

Same as Davis but includes removal of an inflamed bursa










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DeVries

Technically, it is the removal of the lateral plantar condyle. Because the 5th metatarsal is often rotated medially, the lateral plantar condyle is often the most lateral structure, thus making the procedure the same as the Davis.










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Nov 20, 2018 | Posted by in ORTHOPEDIC | Comments Off on Tailor’s Burnion (Bunionette)
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