Close-up of the mouth of a man showing evidence of gingivitis,an inflammation of the gums which become swollen,red & bleed easily. The lower gum of this man is severely swollen,nearly obscuring the row of teeth. Gingivitis is caused by poor dental hygiene,in particular failure to brush the teeth regularly & adequately. Particles of food lodge in the spaces between the teeth,or gums & teeth,causing a build up of bacteria,which leads to infection. If untreated,chronic periodonititis may develop,a condition in which the teeth become loosened & fall out |