ABSTRACT
Background: Salivary lactate dehydrogenase (LDH) is catagorized in altered protein markers present in saliva which shows significantly increased level in oral carcinoma. On the other hand salivary alkaline phosphatase (ALP) is one of the sensitive markers for early detection of oral malignancy. As saliva sample collection is simpler, non-invasive and patient friendly, the use of salivary biomarkers for early detection of oral cancer has been increased remarkably in last decade. Aims & Objectives: To analyze the potential diagnostic role of major two biomarkers i.e, salivary LDH & salivary ALP in oral potentially malignant disorders & oral squamous cell carcinoma. Materials & Methods: In depth search of topic on major search engines like pubmed, google scholar, EBSCO, Wiley online pertaining to the enzymes like salivary LDH, salivary ALP with keywords like salivary LDH, salivary ALP, oral potentially malignant disorders, oral squamous cell carcinoma, salivary biomarkers were done. The literature review was done from 2010-2019. The available data is tabulated & presented under various topics of discussion regarding their regulation & functionality in the body harbouring those disorders & conditions. Conclusion: The salivary LDH is found to be more promising salivary biomarker for detection of oral cancer as per this study. Quite a number of studies have been done during the last decade on the same. Whereas, there is paucity of studies on the role of salivary ALP as a biomarker for oral cancer, instead we can say the role of salivary ALP is rather more in periodontitis in comparison to carcinoma.