CarScreen Salivary testing for caries susceptibility is a diagnostic test used to detect early signs of tooth decay. The saliva sample is tested for specific markers that indicate a person’s susceptibility to caries. The test results can help the dentist to assess the risk of developing caries and to create a personalized treatment plan. This test can be done quickly and conveniently in a dental office and can provide valuable information for the patient’s long-term oral health.