How to Detect Durability Change in Item? (Both Armor and Tools, Weapons, Shields)

Heyo!

I am looking to create a trigger that detects a change in the durability of a given item. 

For example, if an armor piece being worn changes in its durability, the procedure will detect that, allowing me to use it as a trigger for a further procedure. 

I considered using "player tick update" or "world tick update," but neither of them allow for itemstack dependencies. 

What should I do?

Thanks!