< Always use a soft toothbrush for thorough but gentle cleaning. After each meal, or at least twice a day.

< Hold your brush at a 45-degree angle. Begin by brushing the outside of the front teeth. Use a gentle back -and-forth motion.

< Next, brush the outside back teeth, steering along the gum line.

< Inside back teeth: Use short angled brush strokes.

< Inside front teeth: title the brush vertically; use an up-and-down motion.

< Chewing surfaces: hold the brush flat. Use a gentle scrubbing motion.

< Important: always replace your old toothbrush at least every 3-4 months

< Wind 18" of floss around your two middle fingers.

< Gently guide the floss between teeth.

< To remove plaque and debris, gently move the floss up and down against the tooth.

< As you move from tooth to tooth, use a fresh section of floss each time.

Bad breath, or halitosis, can be caused by many things. It may be the result of odor-causing foods, tooth decay, periodontal (gum) disease, continued mouth dryness, use of tobacco products, sinus or respiratory infections, some medical disorders, inadequate oral hygiene or some medications. Your dentist can help identify the cause and, if it's due to an oral condition, can develop a treatment plan to eliminate this common source of embarrassment.

Hygiene-related causes for bad breath: What you eat affects the air you exhale. Certain foods, such as garlic and onions, contribute to objectionable breath odor. Once the food is absorbed into the bloodstream, it is transferred to the lungs, where it is expelled. Brushing, flossing and mouthwash will only mask the odor temporarily. Odors continue until the body eliminates the food. Dieters may develop unpleasant breath from infrequent eating.

If you do not brush and floss daily, particles of food remain in the mouth, collecting bacteria, which can cause bad breath. Food that collects between the teeth, on the tongue and around the gums can rot, leaving an unpleasant odor. Dentures that are not cleaned properly can also harbor odor-causing bacteria and food particles.

Diseases-related causes for bad breath: One of the warning signs of periodontal (gum) disease is persistent bad breath or a bad taste in the mouth. Periodontal disease is caused by plaque, the sticky, colorless film of bacteria that constantly forms on teeth. The bacteria create toxins that irritate the gums. In the advanced stage of the disease, that gums, bone and other structures that support the teeth become damaged. With regular dental checkups, your dentist can detect and treat periodontal disease early.

Bad breath is also caused by dry mouth, which occurs when the flow of saliva decreases. Saliva is necessary to cleanse the mouth and remove particles that may cause odor. Dry mouth may be caused by various medications, salivary gland problems or continuously breathing through the mouth. If you suffer from dry mouth, your dentist may prescribe artificial saliva, or suggest using sugarless candy and increasing your fluid intake.

Tobacco products cause bad breath, stain teeth, reduces one's ability to taste foods and irritate gum tissues. Tobacco users are more likely to suffer from periodontal disease and are at greater risk for developing oral cancer. If you use tobacco, ask your dentist for tips on kicking the habit.

Bad breath may be the sign of a medical disorder, such as a local infection in the respiratory tract (nose, throat windpipe, and lungs), chronic sinusitis, postnasal drip, chronic bronchitis, diabetes, gastrointestinal disturbance, liver or kidney ailment. If your dentist determines that your mouth is healthy, you may be referred to your family doctor or a specialist to determine the cause of bad breath.