(1) Background: Tooth bleaching is a minimally invasive, precise, practical, conservative, and accessible clinical procedure for patients, involving a low degree of difficulty in performance, resulting in improved tooth color. Different tooth bleaching techniques exist, and their use depends on the type and concentration of the bleaching agent as well as the patient’s clinical situation. The study aims to evaluate the aesthetic and clinical efficacy of tooth-bleaching products, analyze their safety, and determine the duration of the bleaching effect. (2) Methods: The study was conducted in the Odontotherapy Clinic of the Faculty of Dental Medicine, Craiova, between April 2023 and June 2024. The study analyzed the efficiency and safety of the bleaching products and the duration of the aesthetic effects obtained. After the end of the bleaching treatment, the clinical results were appreciated. The most relevant cases were presented. (3) Results: The study includes 15 clinical cases with patients who benefited from tooth bleaching treatment. (4) Conclusions: Teeth bleaching with peroxides is an effective method of correcting dental dyschromia, with notable results when performed under the supervision of a specialist under controlled conditions. The area most affected by dental dyschromia is the anterior one, which affects aesthetics and determines patients to want a tooth bleaching treatment.