Using a common antibacterial mouthwash for a week can make saliva more acidic and less able to neutralize acids, which might make tooth decay more likely.
Scientific Claim
Chlorhexidine mouthwash (0.2%) significantly reduces salivary pH and buffering capacity in healthy adults after 7 days of use, which may increase the risk of dental caries.
Original Statement
“After treatment, a reduction in pH (p = 0.005), nitrite (p = 0.006), buffering capacity (p = 0.004) and ammonia levels (p < 0.001) was observed in the CHX-M group (Figure 1).”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
definitive
Can make definitive causal claims
Assessment Explanation
This is a randomized controlled trial with direct measurement of salivary pH and buffering capacity before and after intervention. The p-values of 0.005 and 0.004 indicate statistical significance, supporting definitive language for these specific quantitative findings.
Evidence from Studies
Supporting (1)
The comparative effect of propolis and chlorhexidine mouthwash on oral nitrite-producing bacteria and blood pressure regulation