Final answer:
True, an endodontist treats the dental pulp and surrounding tissue, focusing on pathologies such as infected pulp which may necessitate procedures like root canals. The most significant cariogenic bacterium contributing to tooth decay is Streptococcus mutans.
Step-by-step explanation:
True, an endodontist specializes in treating pathologies of the dental pulp and surrounding tissue. When tooth decay, known as dental caries, penetrates through the enamel and affects the dentin, it can potentially reach the dental pulp. If the pulp is infected, a procedure such as a root canal may be necessary. This involves removing the infected tissue to prevent further spread of the infection which can lead to complications like painful abscesses.
The dental pulp is a vital area that contains nerves and blood vessels within the pulp cavity of a tooth. When an endodontist performs a root canal, they are accessing the pulp cavity through the root canal portion of the tooth. This area is surrounded by dentin and, depending on the location, also by enamel or cementum. Good oral hygiene can prevent the occurrence of dental caries and subsequent infections that may warrant an endodontist's intervention.
The most important cariogenic species of bacteria responsible for tooth decay is Streptococcus mutans. These bacteria feed on sugars and produce acids that degrade the enamel, contributing to tooth decay. Without proper dental care, this can advance to more serious issues requiring the attention of dental specialists like endodontists.