causes of oral malodor (intrinsic) Amin Abusallamah
Introduction• Intrinsic causes of bad breath are oral and systemic in origin. In general, roughly 10 percent of these cases are of systemic origin; approximately 90 percent of the cases are of intraoral origin.
Cont…• the most important source of oral malodor is the microbial deposits on the tongue.
Oral causes• the dorsal posterior surface of the tongue as the primary contributor to bad breath
Cont…• There is some controversy over the role of periodontal diseases in causing bad breath.• Plaque from the anaerobic bacteria growing (subgingival) have a foul smell to produce a very intense bad breath
Cont…• Respiratory tract infiction that communication with oral cavity, tonsillitis, post-nasal drip (caused by nasal infections, sinusitis or nasal polyps)
Systemic diseases• Carcinomas of the upper respiratory tract, including the oropharynx, produce normal or branched organic acids, while lung carcinomas can produce acetone and methylethylketone that lead to bad breath.
Cont…• Liver disease can produce a variety of aromatic compounds, such as H2S, aliphatic acids, CH3SH, ethanethiol and (CH3)2S. Trimethylaminuria is a rare.
Cont…• metabolic disease with symptoms of dysgeusia (perversion of the sense of taste) dysosmia (defect or impairment of the sense of smell), which are due to excess production of trimethylamine (fish odor)
Cont…• Uremia that is caused by kidney failure also produces (CH3)3N along with dimethylamine.
Cont…• uncontrolled diabetes mellitus can emit ketonic breath, which is caused by a metabolic disturbance leading to the production of acetones and other ketones.
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