Is the Level of Nitric Oxide in the Dental Follicular Tissues of Impacted Third Molars With a History of Recurrent Pericoronitis a True Marker of Oxidative Stress?

Abstract

Purpose: Nitric oxide (NO) is an indicator of oxidative stress in several tissues. Its role in dental follicular (DF) tissues of impacted third molars with a history of recurrent pericoronitis is not well elucidated. The present study compared NO levels between inflamed and noninflamed DF tissues of impacted third molars with a history of recurrent pericoronitis. Materials and Methods: A cross-sectional study was designed. The study sample included inflamed DF tissues (test group) with certain local inflammatory symptoms, such as pain, tenderness, swelling, and erythema and noninflamed DF tissues (control group) without local inflammatory symptoms of impacted mandibular third molars. Each patient contributed only 1 specimen to the samples. All tissues samples were biochemically investigated for NO levels as an indicator of oxidative stress. The primary predictor variable was inflammatory status; secondary predictor variables were age and gender. The primary outcome variable was NO level. Descriptive and comparative analyses were conducted. Results: The test group consisted of 57 patients (28 men, 29 women; mean age, 23.28 +/- 5.16 yr) and the control group consisted of 57 patients (30 men, 27 women; mean age, 23.02 +/- 5.42 yr). No relevant inter-group differences were noted for demographic findings such as age and gender. NO levels were significantly higher in inflamed DF tissues of impacted third molars than in noninflamed DF tissues (P < .05). Conclusion: Results of this study showed that NO might be used as an indicator of oxidative stress and the necessity to remove impacted mandibular third molars with a history of recurrent pericoronitis. (C) 2017 American Association of Oral and Maxillofacial Surgeons.