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These bands help stabilise the volar plates over the metacarpal heads. [2] In contrast to the volar plates of the MCP joints of the fingers, the volar plate of the thumb MCP joint is a thick structure firmly attached to the base of the proximal phalanx. It forms the bottom of a two-sided box, the sides of which are made up of the collateral ...
Swan neck deformity has many of possible causes arising from the DIP, PIP, or even the MCP joints. In all cases, there is a stretching of the volar plate at the PIP joint to allow hyperextension, plus some damage to the attachment of the extensor tendon to the base of the distal phalanx that produces a hyperflexed mallet finger.
The plantar plate is firm but flexible fibrocartilage with a composition similar to that found in the menisci of the knee (composed roughly of 75% type-I collagen), and can thus withstand compressive loads and act as a supportive articular surface. Most of its fibers are oriented longitudinally, in the same direction as the plantar fascia, and ...
This is called a "palmar plate, or volar plate injury". [3] The palmar plate forms a semi-rigid floor and the collateral ligaments the walls in a mobile box which moves together with the distal part of the joint and provides stability to the joint during its entire range of motion.
Volar plate damage may be assessed by pressing the finger bones from the back towards the palm. If either individual bone of the affected joint moves freely towards the palm, it is indicative of a tear. [2] Tears of the volar plate may lead to an avulsion fracture – when a piece of bone is pulled off with the ligament. [13]
A Smith's fracture, is a fracture of the distal radius. [1] Although it can also be caused by a direct blow to the dorsal forearm [2] or by a fall with the wrist flexed, the most common mechanism of injury for Smith's fracture occurs in a palmar fall with the wrist joint slightly dorsiflexed. [3] Smith's fractures are less common than Colles ...
Fracture with a dorsal tilt. Dorsal is left, and volar is right in the image. There are a number of ways to classify distal radius fractures.Classifications systems are devised to describe patterns of injury which will behave in predictable ways, to distinguish between conditions which have different outcomes or which need different treatments.
Degenerative changes following injury to the wrist are common, with many developing arthritis. [7] Persistent nerve pain years after the initial trauma is not uncommon. [7] Most finger dislocations occur in the middle of the finger (PIP) and are complicated by ligamentous injury (volar plate). [8]