Dental bleaching procedures are commonly performed to improve esthetics. It can be either in-office professional bleaching techniques or self-administered home-based bleaching agents. These bleaching agents contain variable concentrations of hydrogen or carbamide peroxide that initiates oxidation process mechanism which reduces the extrinsic tooth discoloration. The objective of this review was to discuss the influence of different whitening agents on the mechanical properties of restorative materials. Dentists should be aware of the mechanical properties of restorative materials and ideally prepare the patients free of carious lesions before performing the bleaching procedures. However, bleaching agents with new formulations are introduced that doesn't impact the surface integrity of existing restorations. Moreover, composite restorations on bleached enamel surfaces should be placed after at least 2 weeks. For those patients that require restorative treatment immediately, use of antioxidant agents before bonding procedures on bleached enamel neutralizes completely the deleterious effects of bleaching and increases the bond strength.
Necrotizing sialometaplasia (NS) is defined as a benign, self-limiting inflammatory condition of tissues related to salivary gland. It accounts for less than 1percent of total of biopsied oral lesions. Necrotizing sialometaplasia (NS) has a very good prognosis. Ischemia owing to trauma is the most common cause of necrotizing sialometaplasia, which is a perfectly benign lesion. With or without biopsy, the lesions heal on their own. The goal of a biopsy is to rule out cancer as the cause of their troubling clinical symptoms. The majority of cases of necrotizing sialometaplasia are thought to be caused by vascular ischemia. Management of Necrotizing sialometaplasia doesn’t necessates surgery or medications as the disease is self-healed one, surgery is only applied when cellular masses are massive. This article aims to overview epidemiology, diagnosis and management of necrotizing sialometaplasia.
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