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Context: The reactive oxygen species such as superoxide radicals (O2 •), hydroxyl radicals (OH•), and hydrogen peroxide play a vital role in the pathogenesis of human cancer development and have become one of the areas of key interest in the field of biochemical analysis. Aims: The present study was designed to determine the significance of oxidative stress and levels of nitric oxide (NO) in patients with premalignant disorders and oral squamous cell carcinoma (OSCC), by evaluating the levels of lipid peroxidation products, antioxidants, and NO products. Settings and Design: The present study was conducted on 280 patients for 2 years. These patients were divided into 4 groups, Group I (n = 70, control), Group II (n = 70, oral submucous fibrosis), Group III (n = 70, OSCC), and Group IV (n = 70, OL). Subjects and Methods: The levels of lipid peroxidation products, antioxidants, and NO products were determined by colorimetric methods. Statistical Analysis Used: Paired t-test was used to compare the mean. Results: Lipid peroxidation products such as lipid hydroperoxide and malondialdehyde and NO products such as nitrite (NO2–), nitrate (NO3–), and total nitrite (TNO2–) were significantly elevated, whereas enzymatic and nonenzymatic antioxidants were significantly lowered in OSCC, oral submucous fibrosis, and oral leukoplakia when compared to normal healthy participants. The P values were calculated and came as statistically significant (<0.05). Conclusions: Antioxidant enzyme impairment and NO status may be considered as one of the factors responsible for oral cancer pathogenesis and may serve as a promising biomarker and therapeutic target for minimizing malignant transformation in oral premalignant disorders.

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Background: In the present era, forensic odontology has expanded as one of the most remarkable and commendable branches of Forensic Sciences. Through forensic odontology, a dentist plays a very important role in crime investigation of any type. The main objective of the present study was to evaluate the knowledge, percipience and practical perception of forensic odontology among the dental practitioners in and around Kanpur city.Methods: A cross-sectional study was conducted from Jan-Mar 2019 among 207 dental practitioners in and around Kanpur city including 143 BDS and 64 MDS through a questionnaire proforma. The proforma consisted of 20 questions prepared on the topic of forensic Odontology and role of dentist in the field of forensic Odontology.Results: In this study, nearly 70% of dental practitioners were aware of the role of dentist in forensics, and around 60% of dental practitioners maintain dental records with recording of personal data and clinical findings being the most frequently used method. In the present study most of the dental practitioners were not aware of significance of chelioscopy (63%) and rugoscopy (66%) in field of forensic Odontology. Nearly 70% of dentist accepted the fact that their level of knowledge regarding forensic dentistry is inadequate and nearly 40% of them were not confident in giving any opinion regarding the same.Conclusions: This study shows that although there is an adequate awareness of role of dentist in forensic Odontology, but there is lack of good knowledge, confidence and practical approach of the dental practitioners towards forensic Odontology which may be due to lack of training, experience, exposure in field of forensics. Thus, the need of the hour lies in updating the knowledge and also developing interest of the dental practitioners regarding forensic Odontology.