Answers are grounded in this paper and cite their sources.
Carious lesions in the root surfaces of extracted human teeth were sampled qualitatively for the presence of bacterial forms. Streptococcus mutans was a predominant organism from this lesion. The filamentous organisms appeared typical of the genus Actinomyces. Bacterial strains from the advancing front of the lesions were aerobic gram-positive diphtheroids, with the key characteristics of the genus Arthrobacter.
No takes yet. Share an insight, caveat, or question.
Sumney et al. (1974) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: