Which is not a reason that pits and fissures are more susceptible to decay than smooth surfaces?

Question

Quizplus · Accepted Answer

All of the given reasons contribute to the susceptibility of pits and fissures to decay. They do not benefit from the effects of fluoride as the mineral cannot easily penetrate deep grooves. The enamel at the base of fissures is thinner, making it easier for bacteria to penetrate and damage the tooth. Saliva cannot clean deep pits and fissures effectively, which leads to the accumulation of food debris and bacteria, causing decay.

Which Is Not a Reason That Pits and Fissures Are