In dentistry, nitrous oxide is the most commonly used inhalation anxiolytic and sedation adjunct. It reduces anxiety and pain, and memory of the treatment experienced. It is a valuable component of the armamentarium available to clinicians. When used correctly, it is predictable, effective, and safe.
Oral lichen planus is an immune-mediated and chronic inflammatory condition that can cause erosion of the oral mucosa. The disease is described as reticular, erosive, atrophic, or bullous in nature, and it typically develops in women in their fifth and sixth decades. Reticular oral lichen planus, absent erythema, is asymptomatic and does not usually need intervention. However, as there is potential for conversion to carcinoma, reticular oral lichen planus associated with erythema or erosion needs treatment and periodic re-evaluation. The literature suggests that erosive and ulcerated oral lichen planus is best managed with topical corticosteroid preparations and, in refractory cases, systemic steroids. Several other immunosuppressive medications and non-medication based interventions are also available, but at greater cost and with greater potential for adverse reactions and side effects. This educational review article focuses on best practices in the management of oral lichen planus.