Group of three photographs illustrating three different stages of a lower first molar with an occlusal RBC restoration: 6A exhibits initial examination, recording bravo on marginal adaptation. 6B exhibits the same restoration at one-year recall exam, recording alpha on marginal adaptation. 6C exhibits the same restoration at two-year recall exam, showing partial loss of the sealant on the mesial, while the sealant remained, recording alpha on the buccal, distal and lingual areas.