Diagnostic Accuracy of Salivary DNA Integrity Index in Oral Malignant and Premalignant Lesions

"This test will be performed for ALL three groups:~Sample collection:~Patients will be given a sterile cup containing 5mL saline solution with which they will vigorously rinse their mouth while rubbing their tongues against the oral mucosa for 30 seconds, then spit it back into the cup. The solution will then be used for DNA extraction.~DNA integrity analysis:~The DNA integrity will be done through measuring a housekeeping gene using competitive polymerase chain reaction where the isolated DNA will be combined with DNA capture probes for sequence-specific DNA fragments. The DNA integrity index will be calculated as the ratio of the concentration of longer DNA fragments to the ratio of shorter ones."