That is not necessarily true.
Why must there be an outward sign that there is trouble? Many illnesses, including high blood pressure
, blocked arteries
, and even cancer
will have no outward symptoms until the patient is rushed to the hospital.
Your question did not say how often you go for check-ups or cleanings. Periodontal disease takes many years to manifest itself. The acids from the bacteria
in the calculus around your teeth irritate the gums and bone and cause them to shrink away.
Periodontal disease, if left untreated can cause premature loss of your teeth. Have your dentist explain his findings and his recommended course of treatment.