Objective: To evaluate the clinical application effects of teeth whitening techniques in oral aesthetic restoration, clarify the improvement effects of different whitening techniques on tooth discoloration, their impact on dental tissues, and patient satisfaction, and provide clinical evidence for the rational selection and standardized application of whitening techniques in oral aesthetic restoration. Methods: A total of 120 patients with tooth discoloration who visited the Department of Stomatology at our hospital from January 2023 to January 2024 were selected as study subjects and randomly divided into three groups using a random number table, with 40 cases in each group. The control group received conventional ultrasonic scaling and whitening, Observation Group 1 underwent cold light whitening technology, and Observation Group 2 utilized home whitening techniques. All patients completed 3 months of treatment and follow-up. The L-value (brightness value), a-value (red-green hue value), and b-value (yellow-blue hue value) of teeth were compared before treatment, at 1 month post-treatment, and at 3 months post-treatment. Adverse reactions during treatment were recorded, and aesthetic satisfaction was assessed using the Oral Aesthetic Satisfaction Scale at 3 months post-treatment. Results: The aesthetic satisfaction rate in Observation Group 1 was 95.00%, significantly higher than that in Observation Group 2 (82.50%) and the control group (67.50%) (P<0.05). Conclusion: Teeth whitening techniques demonstrate significant efficacy in oral aesthetic restoration, effectively improving tooth discoloration and enhancing tooth brightness with high safety profiles.