Please clarify exactly what you are looking at and why you think not all the defects with links are showing up. Are you using some sort of query already that you think is not providing complete results?
The Link table is the place where all links between entities are tracked. If it isn't in that table, then I don't think a link exists. If you have proof otherwise, show us.
The Link table is the place where all links between entities are tracked. If it isn't in that table, then I don't think a link exists. If you have proof otherwise, show us.