Erosion–Infiltration (with Icon) in MIH: Practical Tips for Managing White Spot Lesions

Authors:  Jelalia Farah ,Ben Hadj Belgacem Haythem, ,Ziada Saida ,Sana Bagga, Saida Sahtout.

Abstract: 

Introduction:
Molar–incisor hypomineralization (MIH) is a developmental enamel defect that compromises both function and aesthetics. Conventional treatments often show limited effectiveness due to altered enamel properties. Resin infiltration (Icon®) offers a minimally invasive option for managing white spot lesions, with refinements allowing deeper penetration.

Case presentation:

Through a case serie illustrates the step-by-step protocol for treating MIH-related white opacities through a clinical case of a 23-year-old patient, emphasizing key factors for achieving successful outcomes.

Discussion:
The prevalence of MIH in Tunisia is estimated between 10–25%, making it a significant public health concern. Diagnosis is based on exclusion from other enamel defects and carious changes. The present case illustrates that infiltration alone may be insufficient in deeper MIH lesions due to their sub-surface localization. A combined approach, involving selective enamel removal, erosion–infiltration, and composite restoration, enhances both aesthetic outcomes and enamel reinforcement. Adjunctive tools such as transillumination, ethanol testing, and ultrasonic preparation optimize treatment predictability.

Conclusion:
The combined use of microabrasion, erosion–infiltration, and composite restoration proved to be a conservative and effective strategy for MIH-related opacities. Careful lesion preparation and clinical refinements enhanced resin penetration and improved the aesthetic outcome.

Keywords: Molar–incisor hypomineralization, resin infiltration, Icon®, microabrasion, minimally invasive dentistry, enamel defects.

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