Bad breath or halitosis:
The American Dental Association estimates one in four people have bad breath or “halitosis” and some studies have reported that approximately 50 percent of the adult population does have it. In fact, it is estimated that nearly 60 million people will suffer from chronic halitosis in the United States.
Periodontal disease plays a role in numerous disease conditions throughout the body, including heart disease, strokes, ulcers and adverse pregnancy outcomes such as low birth weight and preterm births. Diabetes is also affected and increased by periodontal disease, which alters blood sugar control in diabetics.
Gingival bleeding is highly prevalent among adult populations in all regions of the world; advanced disease with deep periodontal pockets (6 mm or more) affects; 10% to 15% of adults worldwide.
Worldwide, 60–90% of school children and nearly 100% of adults have dental cavities.
Severe periodontal (gum) disease, which may result in tooth loss, is found in 15–20% of middle-aged (35-44 years) adults. Globally, about 30% of people aged 65–74 have no natural teeth.
Information provided by World Health Organization, April 2012 on Oral Health.