Answer :
Final answer:
Osteoarthritis can lead to two specific hand deformities: Ulnar drift and Heberden's nodes, which are characterized by shifting fingers and bony enlargements at finger joints, respectively. These deformities arise from deterioration of cartilage and bone in the hand.
Explanation:
The two hand deformities associated with osteoarthritis are Ulnar drift and Heberden's nodes. Ulnar drift is characterized by a shift of the fingers towards the little finger, caused by imbalance in the muscles and tendons of the fingers. Heberden's nodes are bony enlargements that occur at the distal interphalangeal joints (the joints closest to the end of the fingers and thumb). These deformities are due to the deterioration of cartilage and bone, leading to joint inflammation and formation of new bone. It's important to note that these deformities can limit hand functionality, such as bending and straightening of the fingers, and side-to-side movement of the fingers and hand.
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