HALITOSIS:
Bad breath of oral or gastrointestinal origin.

HEIMLICH MANEUVER:
Techinque employed by rescuer for obstruction of victim's airway.

HEMATOMA:
Swelling of effused blood beneath tissue surface.

HMO or DMO:
Health (dental) maintenance organization which specifies a health care (dental) provider a patient may see. Profitability depends on minimization of treatment.

HYDROGEN PEROXIDE:
Disinfecting solution used in dental irrigation procedures or as mouth rinse.

HYGIENIST:
Dental auxiliary who cleans teeth and provides patient education; administers local anesthetic, nitrous oxide and performs periodontal scaling.

HYPEREMIA:
Increased blood flow; may cause dental sensitivity to temperature and sweets; may precede an abscess.

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