I've had some commercial/institutional-grade fixtures apart, and they're not designed with any similarity to common home-grade retail store fixtures.
I was surprised to see so much stainless steel used, the number of machined parts, and that the valve stems didn't rotate. Instead, the stems were raised and lowered, and gently touched on the seats. There were mechanical stops to prevent the user from forcing the off position (something that's often the cause of early seal failure on stem-type valves).
The seals appeared to be a very firm (thumbnail pressure tester) polyurethane material set into a stainless cup.
I'm fairly certain that the fixtures were made by Eljer, and the styles were similar to what might be found in hospitals. These grades of fixtures would be essentailly maintence free in a home application, unless someone would intentionally beat on them.