Regarding dental caries, which of the following statements is incorrect?

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Lactobacillus is the primary causative bacterium found in dental plaque.Smooth surface caries are caused by Streptococcus mutans.Pit and fissure caries can be prevented through the application of sealants.The use of fluoride helps decrease the occurrence of caries.

Explanation

Lactobacillus is not the main causative organism in dental plaque; instead, Streptococcus mutans plays the primary role. Smooth surface caries are mainly caused by Streptococcus mutans. Pit and fissure caries can be effectively prevented by applying pit and fissure sealants. Fluoride use is known to reduce the incidence of dental caries.