Postal Exam 473 / 473E. Study Guide: Yes! This is the biggie â¦ the most popular Postal exam â¦ the one used to fill all over 90% of all Postal jobs, all entry-level Processing, Distribution, Delivery, and Retail positions. Listed below are the actual jobs filled from this exam: 1  PSE Sales, Service, and Distribution Associate.
Osteoarthritis, also known as degenerative arthritis degenerative joint disease, OA, or osteoarthrosis, is a form of arthritis caused by inflammation, breakdown, and the eventual loss of cartilage in the joints-the cartilage wears down over time.
What Causes Hand Osteoarthritis. Osteoarthritis is a degenerative joint disease, meaning that the cartilage covering the ends of the bones that form a joint gradually deteriorates. Mechanical wear and tear that builds up over time is the most common cause of osteoarthritis, but it can also develop due to an injury. When an injury changes the alignment of a joint, it can damage cartilage more rapidly. In the hands, this damage causes enlarged joints and crooked fingers.