Bad breath, poor oral hygiene in addition to local factors, but also by the impact of systemic factors. Immune function, endocrine system and digestive system disorders and disorders and customs of the country appear, each living their daily diet and environmental conditions, family history and other bad breath can be induced, but the main reason for causing bad breath or calculus.

      Dental calculus, there are two types, one called the gingival calculus, its performance is mainly sedimentary rocks in the adhesion of the gingival sulcus or more, can be seen directly brownish black, light yellow, brown lumps of varying sizes. Another type is called subgingival calculus, mainly deposited in the gingival sulcus following section, generally difficult to find and see that only by experienced medical professionals to clean cleaned by ultrasonic scaler.

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