If the sealant of bonding agent is not applied to part of enamel that has been etched, what would you expect?

When a bonding agent or sealant is not applied to a part of the enamel that has been etched, the exposed etched enamel surfaces can undergo continued demineralization. The etching process removes some of the surface structure and creates microscopic pores, which can make the enamel more susceptible to acid attacks from oral bacteria. Without the protective layer of the bonding agent or sealant on these etched areas, the enamel will not be able to remineralize properly and is more likely to suffer from ongoing demineralization, leading to potential carious lesions over time. This makes it critical to apply a bonding agent or sealant after etching to protect the vulnerable enamel and prevent further damage.