How do I read the whole picture, not just the obvious problem?

You can find the obvious cavity, no problem. What eludes you is stepping back and reading the whole picture, how everything in the mouth connects and what it all adds up to. That is the difference between spotting a single problem and truly diagnosing. One is a task. The other is a way of seeing, and it comes with time. The whole picture hides because you are trained to hunt for individual problems, one tooth at a time. But the mouth is a system. A pattern across several teeth, the gums, the wear, often tells a bigger story than any single spot. Reading it means letting your eyes go wide before they go narrow. Start each exam with one slow, whole look before you zoom in on anything, and ask yourself what story all of it tells together. Then go find the specific problems. That habit of seeing the whole first is what turns spotting cavities into real diagnosis. It is a skill you build by practicing the wide look, again and again.