The Orthopaedic Trauma Association (OTA) classified a fracture involving the patella.
OTA designation: 45
|
Fracture Location, Type |
Designation |
|
extra-articular, avulsion |
A1 |
|
extra-articular, isolated body |
A2 |
|
NA |
A3 |
|
partial articular, vertical and lateral |
B1 |
|
partial articular, medial |
B2 |
|
partial articular, multi-fragmentary (stellate) |
B3 |
|
complete articular, transverse |
C1 |
|
complete articular, transverse plus second fragment |
C2 |
|
complete articular, complex |
C3 |
where:
• The extensor mechanism is intact in partial articular (B) fractures but not in complete (C) fractures.
|
Fracture |
Designation |
|
avulsion |
A1 |
|
NA |
A1.2 |
|
NA |
A1.3 |
|
simple |
A2.1 |
|
multi-fragmentary |
A2.2 |
|
NA |
A2.3 |
|
NA |
A3.1 |
|
NA |
A3.2 |
|
NA |
A3.3 |
|
simple |
B1.1 |
|
multi-fragmentary |
B1.2 |
|
NA |
B1.3 |
|
simple |
B2.1 |
|
multi-fragmentary |
B2.2 |
|
NA |
B2.3 |
|
multi-fragmentary |
B3.1 |
|
NA |
B3.2 |
|
NA |
B3.3 |
|
middle |
C1.1 |
|
proximal |
C1.2 |
|
distal |
C1.3 |
|
middle |
C2.1 |
|
proximal |
C2.2 |
|
distal |
C2.3 |
|
3 fragments |
C3.1 |
|
more than 3 fragments |
C3.2 |
|
non-reconstructible |
C3.3 |
Specialty: Surgery, orthopedic, Emergency Medicine, Critical Care, Surgery, general
