Which type of composite filling is best for molar pits and fissures superficial cavity? Two dentists said that I need filling on four molars(6). What should  I opt for to maximise the duration? How long does FRC composite stay with good oral hygiene? Is it the best composite for back molar grooves as all my cusps are okay? Can I drink sugar now and then if I maintain my oral hygiene? Or should I wait to have filling as I don't have any pain and xray turned out fine. I can visibly see black small holes in my tooth. Another question is if it doesn't stay a lifetime, then can i switch to gold fillings from frc composite? Is that possible or will I be loosing more tooth enamel?