Classification of the first metacarpal fractures

Classification of the first metacarpal fractures
ICD-10	S42.2-S42.4
ICD-9	812
eMedicine	emerg/199  orthoped/271 orthoped/199

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mohammadmain Rezazadehsaatlou[2].

Overview

Thumb involves in almost 50% of hand function and its metacarpal base maintains the stability for grasping and pinching in different positions by providing a significant range of motion. A spectrum of the fractures of the thumb base have been described in orthopedic medicine: Juxta-articular metaphyseal fracture Bennett fracture Rolando fracture

Classification

Meanwhile having a well defined classification pattern is necessary and helpful in diagnosis and management of the fractures of the thumb.

Classification of the first metacarpal fractures

Name	Type	Features
Oblique	Extra-articular	• oblique fracture line not involving the articular surface
Transverse	Extra-articular	• a pure transverse fracture line not involved the articular surface
Bennett	Intra-articular	• intra-articular fracture with a palmar radial fragment
Rolando	Intra-articular	• Y or T shaped complete intra-articular fracture
Comminuted	Intra-articular	• severely comminuted complete intra-articular fracture