Could a tricuspid valve be replace with mechanical?

If it can't be fixed: The tricuspid valve is the valve between the right atrium and right ventricle. Most commonly it can be repaired if it is leaking. If a repair is not possible it can be replaced with either a mechanical valve or a tissue valve (bioprosthetic valve). The exact type depends of many patient related issues.

Yes: Depending on the situation, tricuspid valve problems can be treated with mechanical valves, tissue valves, valve repair, or sometimes medications. Sometime tricuspid valve problems can get better by treating other problems with the heart (like left-sided valve issues). Check with a doctor for details.