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February 8, 2012
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Broken Hand

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Broken Hand Overview

The hand is a marvelously complex part of the human anatomy. Every year, however, millions of people experience broken bones within their hands. Because we are so dependent on our hands, even a small loss of function can result in a lifelong disability. A broken hand will often require a visit to a doctor, and it may require months of rehabilitation care.

  • The hand is composed of 27 bones, including those in the wrist. Broken bones most commonly result from a direct blow to or by the hand, or a fall onto the hand. Common injuries include fractures of the fingertip, broken knuckles, or fractures of the thumb.
  • When doctors describe the bones in the hand, they use several terms.
    • Carpals or carpal bones are the 8 bones in the wrist. They are not actually part of the hand but are vital for its function.
    • Metacarpals are the 5 bones that form the palm of the hand.
    • Phalanges are the 14 small bones that, when strung together, form the thumb and fingers. The thumb has 2 phalanges. The other 4 fingers are made of 3 phalanges each.
    • The knuckles of the hand are referred to as the MCP joint, which stands for metacarpal-phalangeal joint (because the fingers, composed of phalanges, join the palm, made of metacarpals).
    • The joints in the fingers are called the PIP and DIP joints. The PIP joint is the proximal interphalangeal joint and is the joint closest to the palm. The DIP joint is the distal interphalangeal joint and is the joint closest to the fingertip.
    • The fingers are called the thumb, index finger, middle (or long) finger, ring finger, and pinky (or small) finger. Sometimes your health care practitioner might refer to your fingers by number, in which case the 1st digit is the thumb, and the small finger is the 5th digit.
    • The handedness (right or left) of the person is called the dominance of the hand. If you are left-handed, then you are left-hand dominant.

Picture of the Bones in the Hand

Bones of the Hand

Broken Hand Causes

Hand injuries are caused by workplace injuries, improper use of tools, blunt trauma to the had (punching or striking injuries) crush injuries, falls, and sports injuries. The vast majority of hand injuries can be prevented.

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Broken Hand - Causes

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Broken Hand

Hand Injury Overview

Intricate in design and function, the hand is an amazing work of anatomy. Form follows function in the hand; therefore, any injury to the underlying structures of the hand carries the potential for serious handicap. To reduce this risk, even the smallest hand injuries require a good medical evaluation.

The goal with injuries to the hand is a rapid and accurate initial evaluation. In other words, once an injury occurs, the doctor strives to begin medical treatment quickly so the short- and long-term effects can be minimized.

The hand consists of 27 bones when the 8 bones of the wrist are included. When the other associated structures (nerves, arteries, veins, muscles, tendons, ligaments, and joint cartilage) are considered, the potential for a variety of injuries exists when trauma involves the hand.

Hand injuries account for nearly 10% of hospital Emergency Department visits. A recent series of 1,000 consecutive hand injuries showed the ...

Read the Hand Injuries article »


Read What Your Physician is Reading on Medscape

Fracture, Hand »

Hand fractures, a frequent emergency department complaint, are the most common fractures of the body.

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