Dental fluorosis is a particular condition brought on by long-term, excessive fluoride consumption during the formation of enamel. Fluorosis staining is frequently seen as an aesthetic problem may have psychological effect of when seen on maxillary anterior teeth. Bleaching, microabrasion, veneering, and crowning are some of the treatment options. Bleaching is a conservative approach of restoring the colour of teeth with intrinsic discolouration. Among the various bleaching techniques, In-office or Power bleaching techniques are effective to obtain result immediately. The dentist is in complete control of the process throughout the treatment. It is a fast process and results are evident in single visit. Here we present a case of management of dental fluorosis using Power bleaching technique.

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Fundamental defect centers in glass: Electron spin resonance and optical absorption studies of irradiated phosphorus-doped silica glass and optical fibershave been prepared using melt quench technique. Optical absorption spectra of the pure glasses reveled that the cutoff wave length decreases and optical band gap (E opt ) increases where as Urbach energy (ΔΕ) decreases with increase in Na 2 O content. The E opt values of these glasses are found to be in the range 2.818-3.217 eV where as the values of ΔΕ are in the range 0.23-0.35 eV.