Caries Activity Test
A chairside or laboratory diagnostic test used to estimate the number or activity of cariogenic microorganisms, particularly Streptococcus mutans and Lactobacillus species, in a patient's saliva or plaque.
Full Definition
Caries activity tests assess a patient's current susceptibility to dental caries by quantifying cariogenic bacteria or measuring salivary factors such as buffering capacity and flow rate. Common commercial tests include the Dentocult SM strip mutans test (for Streptococcus mutans) and Dentocult LB (for Lactobacillus). Results are used to stratify caries risk and tailor preventive protocols. Editors should be careful to distinguish 'caries activity test' (measuring current bacterial load or salivary factors) from 'caries risk assessment' (a broader clinical process incorporating multiple risk indicators). The plural is 'caries activity tests', not 'carie activity tests'; 'caries' is always plural in form but treated as a singular noun when referring to the disease.
Usage
Usage note: Note that 'caries' is always used in this form — never 'carie'. 'Caries activity test' is distinct from a broader 'caries risk assessment'; the two should not be conflated in preventive care documentation.
In Context
- "A caries activity test revealed high Streptococcus mutans counts, prompting the hygienist to intensify the fluoride prevention protocol." — Preventive care plan
- "The preventive care section conflates 'caries activity test' with 'caries risk assessment'—these are related but distinct concepts requiring separate definitions." — Editorial review comment