Acid-etch repair of hereditary type 4 enamel hypoplasia.

Defects of the enamel include hypoplasia and hypomineralization. The cause can be local, systemic, or hereditary. A 14-year-old boy had type 4 hereditary hypoplastic enamel. The Nuva-Seal, Nuva-Fil acid-etch technique was used to restore the defect.