Alveolar bone resorption, which is stimulated by chronic inflammation or occlusal trauma, leads to the resorption of alveolar bone and a high decrease in bone content, and is an important pathological change in periodontal disease. In normal healthy humans, alveolar bone resorption and renewal are in balance. When calculus or plaque irritates the alveolar bone in the gingiva, or when the bite relationship is improper and the bone is compressed, it may cause increased bone resorption or affect bone renewal. Alveolar bone resorption causes loss of tooth supporting tissues, gradual loosening of teeth, and eventual loss or extraction. Therefore, it is important to maintain good oral hygiene in general, as well as to seek medical attention as soon as possible when early periodontal problems occur, such as bleeding gums, red and swollen gums, etc.