Your bone and gum tissue should fit snugly around your teeth like a turtleneck around your neck.
When you have periodontal disease, this supporting tissue and bone is destroyed, forming "pockets" around the teeth.
Over time, these pockets become deeper, providing a larger space for bacteria to live.
As bacteria develop around the teeth, they can accumulate and advance under the gum tissue.
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These deep pockets collect even more bacteria, resulting in further bone and tissue loss.
Eventually, if too much bone is lost, the teeth will need to be extracted.
Fuente: Youtube / Dr Teeth