How do I know if my teeth are worth keeping, or whether it is too late?

First things first. Consult with a dentist if you are concerned about the signs of gum disease. They may refer you to a specialist Periodontist depending on the nature of your condition.

The initial findings of the bone levels on your x-rays (in proportion to your age) are the usually the key indicator of how long your loose teeth might last.

There are many other factors which the dental professional diagnosing your condition will use to help predict the future story of how things might unfold. Then it is all about communicating to co-pilot the next steps with them.