What tendons are in Zone 2?
We hypothesize that a region of the flexor digitorum profundus (FDP) and flexor digitorum superficialis (FDS) tendons in zone 2 exists that, when involved in a laceration repair, will reliably catch on the A2 pulley after surgery.
Why is Zone 2 of hand called No Man’s Land?
Bunnell, in 1918, coined the term “no man’s land” to describe zone 2 in the hand because at that time it was felt that no man should attempt repair within this zone.
What are extensor tendon zones?
Zone I refers to the area from the DIP joint to the fingertip; zone II encompasses the middle phalanx; zone III refers to the PIP joint; zone IV is over the proximal phalanx; zone V refers to the MP joint; zone VI encompasses the metacarpal and zone VII is over the wrist (see Fig.
How many zones are in a hand?
There are 5 Flexor and 9 Extensor Zones of the Hand. They are used to describe the location of a tendon injury, guide post-operative therapy and predict prognosis.
How many extensor tendons are in the hand?
As with all disorders of the hand, diagnosis and correct therapy application hinges on a thorough understanding of the relevant anatomy. The upper extremity contains 12 extensor tendons. These tendons comprise an extensor system that dorsally maneuvers the wrist, thumb, and all fingers.
Where is zone 2 in the hand?
Zone II. Zone II extends from the middle of the middle phalanx to distal palmar crease. It contains both flexor tendon superficialis and flexor tendon profundus. Proximal to zone II, the flexor digitorum superficialis tendons lie superficial to the FDP tendons.
What type of tendon in the hand is found in Zone 2 No Man’s Land?
Zone 2 flexor tendon injuries: Venturing into the no man’s land.
What are the zones of the extensor tendons?
The extensor tendons pass from the forearm onto the dorsum of the hand through the six dorsal wrist compartments beneath the extensor retinaculum. Zone I: located at the level of distal interphalangeal joint (DIP). Zone II: located at the level of the middle phalanx.
Where do the extensor tendons pass through the hand?
The extensor tendons pass from the forearm onto the dorsum of the hand through the six dorsal wrist compartments beneath the extensor retinaculum. Zone I: located at the level of distal interphalangeal joint (DIP).
How many extensors are there in the hand?
Extensors: 9 dorsal zones described relative to bony structures. Thumbs: Different zones of the hand, referred to as “T”. Kleinert and Verdan in 1983, first described the flexor (volar) zones of the hand, for simplifying the management of flexor tendon injuries3 .
What are the extensor zones for mallet finger?
Extensor Zones 1 Zone I: over the DIP (this is where mallet finger injuries occur). 2 Zone II: middle phalanx. 3 Zone III: over the PIP. 4 Zone IV: proximal phalanx. 5 Zone V: over the MCP. 6 (more items)