Resorption. Bone will resorbe (or dissolve) when it undergoes stress or trauma. Bacteria releases toxins that can irritate tissue and bone. The tissue will turn red and bleed... The bone will simply dissolve. Bone resorption that is untreated can result in toothh loss.
Periodontitis. Periodontitis, a condition known where attachment apparatus of the teeth is damaged and reduced, i.e. Progressive bone loss of bone tissue.