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Theory III Study Guide EXAM #1
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---5November 20242024/2025A+
- Theory III Study Guide EXAM #1 
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1. definition of sub- 
stantivity 
"how long it lasts" 
measures the ability of an active agent to be retained in 
the oral cavity and to continue to be released over an 
extended period of time WITHOUT LOSING POTENCY. 
2. which oral rinse 
has the highest 
substantivity rat- 
ing? 
Chlorhexidine (CHX) gluconate 
ex. peridex or periogard 
substantivity of 8-12 hrs. 
most effect
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