Aesthetic rehabilitation of an incisor affected by MIH using infiltrative resin

Abstract

Introduction. Molar-incisor hypomineralization (MIH) is a qualitative enamel defect of systemic origin that primarily affects the first permanent molars and incisors. Clinically, it presents as well-demarcated opacities ranging in color from creamy-white to yellowish-brown, and is often associated with porous enamel structure, making it prone to post-eruptive breakdown. Infiltrative resins penetrate the affected enamel through capillary action, sealing subsurface lesions without the need for cavity preparation. This minimally invasive technique not only reinforces the structural integrity of the enamel but also significantly enhances its aesthetic appearance by reducing the contrast between sound and hypomineralized enamel. Case Report: An 11-year-old male patient presented to the Pediatric Dentistry Clinic at the Comprehensive Medical Care Center of the University of Guadalajara, reporting discomfort due to the appearance of his anterior tooth. Clinical examination revealed a well-defined creamy-white opacity with superficial enamel loss on the labial surface of tooth #8 (FDI 11). Resin infiltration was performed to improve the tooth’s esthetics. Conclusion:  Resin infiltration proved effective in reducing the visibility of the opacity and reinforcing the dental structure, representing a conservative and aesthetic treatment option for this enamel defect in young permanent dentition.