![]() ![]() Related Document: Parkinson Life Center of Southern New Jersey's Guide to Boutonniere Deformity of the Fingerīoth forms of arthritis can cause enlarged areas over the back of the PIP joints. Related Document: Parkinson Life Center of Southern New Jersey's Guide to Swan Neck Deformity of the Finger When the PIP joint flexes and the DIP joint extends, a boutonniere deformity forms. Swan neck deformity occurs when the middle finger joint (the PIP joint) becomes loose and hyperextended, while the DIP joint becomes flexed. The IP joints may begin to flex (bend) or hyperextend (over straighten), causing characteristic finger deformities. Ulnar Driftīoth rheumatoid arthritis and osteoarthritis can affect the IP joints of the fingers. Ulnar drift can cause weakness and pain, making it difficult to use your hand for daily activities. The MCP joints of the fingers may actually begin to point sideways (towards the little finger). In rheumatoid arthritis, the fingers often become deformed as the disease progresses. The sensitive joint may feel enlarged and warm to the touch from inflammation. When the arthritis condition worsens, pain may be felt even at rest. But after resting for several minutes the pain and stiffness increase. Once the activity gets underway, the pain eases. At first, the pain usually only causes problems when you begin an activity. The damage in the joint starts well before the symptoms of arthritis appear. Eventually, the joint can no longer compensate for the increasing damage, and symptoms begin. Since articular cartilage cannot heal itself very well, the damage adds up. Over time, this imbalance in the joint can lead to damage to the articular surface. This is similar to how a machine that is out of balance wears out faster. When an injury changes the way the joint lines up and moves, force can start to press against the surface of the articular cartilage. This may make the joints line up differently. After a fracture, the bone fragments may heal in slightly different positions. An injury to any of the joints of the fingers, even if it does not injure the articular cartilage directly, can alter how the joint works. Injury to a joint, such as a bad sprain or fracture, can cause damage to the articular cartilage. ![]() Degenerative arthritis is usually called osteoarthritis. You may also hear the term degenerative arthrosis used. The term degenerative arthritis means inflammation of a joint due to wear and tear. The term arthritis means joint inflammation (pain, redness, heat, and swelling). Related Document: Parkinson Life Center of Southern New Jersey's Guide to Hand Anatomyĭegenerative arthritis is a condition in which a joint wears out, or degenerates, usually slowly over a period of many years. There is articular cartilage essentially everywhere that two bony surfaces move against one another, or articulate. The function of articular cartilage is to absorb shock and provide an extremely smooth surface to facilitate motion. This white, shiny material has a rubbery consistency. The finger and thumb joints are covered on the ends with articular cartilage. The IP joints of the digits also work like hinge joints when you bend and straighten your hand. The thumb only has one IP joint between the two thumb bones. The joint near the end of the finger is called the distal IP joint (DIP joint). The one closest to the MCP joint (knuckle) is called the proximal IP joint (PIP joint). The three phalanges in each finger are separated by two joints, called interphalangeal joints (IP joints). The MCP joint acts like a hinge when you bend and straighten your fingers and thumb. This joint is called the metacarpophalangeal joint (MCP joint). ![]() The main knuckle joint is formed by the connection of the phalanges to the metacarpals. Small bone shafts called phalanges line up to form each finger and thumb. One metacarpal connects to each finger and thumb. The bones in the palm of the hand are called metacarpals. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |