Can a broken arm affect keinbocks disease?

No, a broken arm will not affect Keinböck's disease.

Keinböck's disease is a rare bone condition that affects the lunate bone in the wrist. It is caused by a disruption of the blood supply to the lunate bone, which leads to the bone gradually dying and collapsing.

A broken arm is a fracture of one or more of the bones in the arm. While a broken arm can cause pain and disability, it will not directly affect the lunate bone or cause Keinböck's disease.