Magnetoelectric-powered electrocatalysis for rapid wireless tooth whitening.

Aesthetic dentistry acts as a crucial symbol of oral health, and its development relies on advances in tooth-whitening strategies. Traditional peroxide-based whitening agents are restricted by inconvenient clinical operation and potential damage to the surface enamel and surrounding soft tissues. Novel non-destructive methods based on photo-, piezo- and pyro-catalysis present advantages in terms of usage and biosafety. However, their applications are still challenged by their whitening efficiency and time consumption. Targeted at these drawbacks, our study presents an innovative wireless and convenient tooth-whitening system using magnetoelectric-powered electrocatalysis in response to an external alternating magnetic field. Enamel deposits can be degraded by electro-catalysis within an obviously short span of time. Wireless electric output can promote the generation of redox compounds within whitening gels, thereby accelerating pigment degradation on stained teeth and shortening the treatment time compared with existing methods. Therefore, the newly developed wireless magnetoelectric-powered electrocatalytic system provides a potential strategy for the advancement and improvement of clinical tooth whitening strategies and oral aesthetics.