Periodontitis is an infection of the supporting tissues of the teeth caused by pathogenic bacteria, resulting in bone loss. It starts as gingivitis, an inflammation of the gums that can progress to more severe periodontitis. Regular cleanings and good oral hygiene practices can slow down or halt the progression of periodontitis, as plaque is a primary contributing factor. Early detection through regular dental check-ups is crucial, and treatment options range from frequent cleanings and antibacterial products to surgical procedures and specialized cleaning instruments.