**8. References**


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**Estimation of the Velocity of the Salivary Film** 

**Using Atomic Absorption Spectrophotometry** 

**Measurement of Potassium Chloride in the Agar** 

Saliva is secreted into the mouth at a rate of 0.3 to 0.4 ml per minute. Retained saliva in the mouth physiologically triggers swallowing to carry the saliva out of the mouth. Dawes (1983) have reported the volume of saliva in the mouth just before swallowing, the rate of swallowing, the volume swallowed per swallow, and the volume of saliva in the mouth just after swallowing. Clearance of materials from the mouth is facilitated by alternatelyperformed saliva secretion and swallowing, and thereby the oral environment is maintained relatively constant (Fig.1). The unstimulated salivary flow rate and saliva volume in a single

Saliva is a crucial factor for protection of the oral environment. The rate of oral clearance of sugar and acid is inversely related to the onset and progression of dental caries, as shown

swallowing have the most influence on the efficiency of clearance.

**1. Introduction** 

Fig. 1. Saliva volume in the mouth

particularly in persons with severe hyposalivation.

**at the Different Regions in the Mouth –** 

Shigeru Watanabe *Meikai University* 

*Japan* 

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