The Orthopaedic Trauma Association (OTA) classified a fracture involving a metacarpal bone in the hand.
|
Toe |
Metacarpal |
|
Thumb |
T |
|
Index |
I |
|
Middle |
M |
|
Fourth (Ring) |
R |
|
Fifth (Little) |
L |
OTA designation: 25
|
Fracture Location, Type |
Designation |
|
distal (head), extra-articular |
A1 |
|
distal (head), articular |
B1 |
|
distal (head), articular/extra-articular |
C1 |
|
NA |
A2 |
|
diaphyseal |
B2 |
|
NA |
C2 |
|
proximal (base), extra-articular |
A3 |
|
proximal (base), articular |
B3 |
|
proximal (base), articular/extra-articular |
C3 |
where:
• The OTA for metacarpal starts with the opposite end from metatarsal bones.
|
Fracture |
Designation |
|
simple |
A1.1 |
|
metaphyseal wedge |
A1.2 |
|
metaphyseal complex |
A1.3 |
|
oblique/spiral |
B1.1 |
|
sagittal |
B1.2 |
|
coronal |
B1.3 |
|
simple articular, simple metaphysis |
C1.1 |
|
simple articular, multi-fragmentary metaphysis |
C1.2 |
|
multi-fragmentary articular, simple metaphysis |
C1.3 |
|
multi-fragmentary articular and metaphysis |
C1.4 |
|
spiral/oblique |
B2.1 |
|
transverse |
B2.2 |
|
simple wedge |
B2.3 |
|
complex |
B2.4 |
|
simple |
A3.1 |
|
metaphyseal multi-fragmentary |
A3.2 |
|
avulsion |
B3.1 |
|
depression |
B3.2 |
|
split/depression |
B3.3 |
|
simple articular, simple metaphysis |
C3.1 |
|
simple articular, multi-fragmentary metaphysis |
C3.2 |
|
multi-fragmentary articular, simple metaphysis |
C3.3 |
|
multi-fragmentary articular and metaphyseal |
C3.4 |
Specialty: Surgery, orthopedic, Emergency Medicine, Critical Care, Surgery, general
