● Age of pits & fissures sealant:
○ 3 – 4 y for 1st molars
○ 6 – 7 y for 1st permenant molar
○ 11 – 13 y for 2nd permenant molars & premolars.

Bonding nature of Cements
● Zn polycarboxylate ー chemical
● GIC ー chemical }acrylic liquid
● Composite ー micromechanical
● Pit and fissure ー micromechanical } phosphoric
● Zn phosphoric ー micromechanical
● InLay ー retention
● OnLay ー retention

Prophylactic Rx
● Occlusal only ー pit and fissure
● Others ー fluoride application (not enough for pits – no retention)
● Full mouth ー pit and fissure 1st followed by topical fluoride