title: Critical Appraisal. Effects of bleaching on tooth structure and restorations, part I: effects on enamel.
abstract: Tooth whitening has become a common treatment over the last 15 years, and much research has been reported on the effects of bleaching procedures on enamel, dentin, and restorative materials. We are presenting a series of Critical Appraisals on this topic, beginning this issue with a focus on the effects of bleaching on enamel.