Which of the following is NOT a cause of periodontitis?

Regular dental cleanings do not cause periodontitis; rather, they are preventive measures that help maintain oral health and prevent gum disease. Periodontitis is primarily caused by bacterial infection and inflammation of the gums, which can be exacerbated by factors such as poor oral hygiene, age, genetics, and diet.

Regular dental cleanings can help remove plaque and tartar buildup, which are significant contributors to the development of periodontitis. Furthermore, these cleanings allow dental professionals to identify early signs of gum disease and provide necessary interventions before the condition worsens. In contrast, age, genetics, and diet can all influence an individual's susceptibility to periodontal disease, but regular dental cleanings serve as an important proactive strategy to prevent these issues from developing.