change to black color may be because of two reasons...
1. extrinsic stains caused by bacteria in plaque
2. any hit/ trauma resulting in loss of life of the tooth
visit a near by dentist to get a perfect idea of the problem
Oral And MaxilloFacial Surgeon
8 yrs exp
Hi! Change in teeth color is more likely because of progressive plaque(sticky film) layer that accumulates on surface of the teeth.
Progressively, Plaque hardens and form a strong layer called as calculus over a period of time, which is yellowish to brownish in color.
Normal food we consume has artificial/natural colors incorporated which these sticky films attracts and deposit them leading to color change.
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