Final answer:
Green staining on children's teeth can be linked to ancient burial practices involving metals reacting with acid, while Streptococcus mutans is a significant contributor to plaque biofilms.
Explanation:
Green staining on children's teeth, caused by poor hygiene and retained fungi in bacterial plaque, can be an indication of certain burial practices involving metals reacting with acid, as seen in ancient Greek practices. In dental health, Streptococcus mutans is the most important contributor to biofilms in plaque, leading to stains and decay on teeth.
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