Elbow

Question 1

Elbow instability

Answer 1

O’Driscoll CORR 1992

1. PLRI - LUCL only
2. Perched - LUCL + anterior capsule
3. Dislocated - only anterior band MCL intact
4. Multidirectional - ant band MCL also gone

Question 2

Radioulnar synostosis classification

Answer 2

1. Congenital

Usually syndromal 
Apert
Carpenters
A'gryposis
Mandibulofacial dysostosis

Cleary + Omer classification

1. Fibrous + normal radial head
2. Osseous + normal radial head
3. Osseous + posteriorly dislocated R head
4. Osseous + anteriorly dislocated radial head
5. Acquired
   Trauma/surgery