After rinsing mouth with mouthwash, do we should rinse with fresh water? if yes after what time? if not then why it can not increase acidity of mouth which will lead to enamel calcium degradation?
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The answer is no. You should avoid any type of water or food intake for approx. 30 minutes after using mouthwash. A clinical study evaluated the effect of rinsing with a mouthwash on salivary ph and plaque ph. Following pre treatment ph determinations, subjects rinsed with tap water for 30 seconds and ph was monitored periodically over 30 minutes; after a 10 minute rest period, the procedure was repeated with mouthwash substituted for tap water. Both the plaque ph and the salivary ph remained well above the critical ph of 5.7 (where demineralization occurs during the entire 30 minute period of the study). In addition, it is important to note that mouthwash (ph 4.2) is rapidly neutralized by the buffers in saliva during and after rinsing and any drop in ph will be of extremely short duration, especially when compared to that of carbonated drinks and citrus drinks and fluids which are far more difficult to neutralize. Furthermore, mouthwash is an expectorated product; therefore the contact time of the mouth rinse with the tooth surface is short.
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