Question

why were the first artificial hip joint implants unsuccessful? (1 point) they shattered when patients tried to walk. they caused infection in the joints. they broke apart due to friction between bones. they were so stiff patients were unable to move.

Explanation:

The first artificial hip joint implants were made of materials that were too brittle. When patients tried to walk, the mechanical stress caused them to shatter.

Answer:

They shattered when patients tried to walk.