INBDE (Integrated National Board Dental Examination) 2026 – 400 Free Practice Questions to Pass the Exam

Coronal caries are caused by bacteria present in the oral cavity. While all of the options listed are bacteria found in the oral cavity, S. mutans is the specific bacteria that is responsible for causing coronal caries. P. intermedia, S. salivarius, and Actinomyces can also contribute to oral health issues, but they are not the primary cause of coronal caries. A and C are involved in the development of periodontal disease, while B is commonly found in plaque and can contribute to tooth decay. However, these bacteria do not specifically cause coronal caries like S. mutans does.