Green Stains Present on the tooth of child | Best MDS Coaching AIPGDEE preparations B-IDS

Green Stains Present on the tooth of child is due to ?
A. Chromogenic bacteria
B. Plaque
C. Food debris
D. None

Ans. (A)

Chromogenic bacteria cause stains, typically at the gingival margin of the tooth. The most common is a black stain caused by Actinomyces species. The stain is composed of ferric sulfide and is formed by the reaction between hydrogen sulfide produced by bacterial action and iron in the saliva and gingival exudates. Green stains are attributed to fluorescent bacteria and fungi such as Penicillium and Aspergillus species (Hattab, 1999).

The organisms grow only in light and therefore cause staining on the maxillary surface of the anterior teeth. Orange stain is less common than green or brown stains and is caused by chromogenic bacteria such as Serratia marcescens and Flavobacterium lutescens.