Arthritis deformans is a medical condition that affects the joints and results in pain, stiffness and deformity. There are several synonyms for arthritis deformans, including osteoarthritis, degenerative joint disease, and wear-and-tear arthritis. Osteoarthritis is the most common type of arthritis, and is caused by the wear and tear of joint cartilage, leading to inflammation and joint destruction. Degenerative joint disease is another term used to describe this condition and is commonly associated with aging and a gradual breakdown of the joint tissue. Wear-and-tear arthritis is a colloquial term commonly used to describe arthritis deformans that occurs due to the repetitive stress on the joints over time. Regardless of the term used, arthritis deformans is a debilitating condition that requires proper medical management to improve symptoms and quality of life.