How much is 50% periodontal bone loss?

Too much: If you are talking about 50% periodontal bone loss meaning half of your mouth, then it is a serious problem that should be treated by the general dentist or periodontist. If you are talking about 50% periodontal bone loss around a single tooth, that also needs to be treated, but at least it is an isolated problem. Either way, 50% bone loss is not something that should be ignored.

Severe: When a dentist refers to 50% periodontal bone loss, they are generally seeing an area where half of the bone that was originally supporting a tooth has been destroyed. Sometimes this bone loss is localized (affecting 1or 2 teeth), but often it is "generalized" meaning that a similar amount of bone has been lost around several or all the teeth in the mouth.

Severe: You used to 2x more tooth covered by bone than in your mouth. You now have 2x more tooth in your mouth than in your bone.

Moderate: 50% bone loss likely means that bone has been lost to the middle third of the root. This would equate to a diagnosis of moderate severity. At 30 years old, 50% is way too much for you. You may have an aggressive form of periodontitis and should be seen by a specialist - a board certified periodontist.