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Black staining: an overview for the general dental practitioner
Uzair Janjua1, Gurpreet Bahia2, Siobhan Barry3
1General Dental Practitioner, House of Dental, Birmingham, UK. dr.uzair.janjua@gmail.com.
British Dental Journal
|June 24, 2022
Summary
Black stain, a common extrinsic tooth discoloration, appears as dark dots along the gumline. Its exact cause involves chromogenic bacteria and iron deposits, with a low associated risk of cavities.
Area of Science:
- Dentistry
- Oral Microbiology
Background:
- Black stain is an extrinsic tooth discoloration affecting buccal and palatal surfaces of primary and permanent teeth.
- It manifests as dark dots at the cervical third, following the gingival margin.
Observation:
- Prevalence estimates for black stain vary, ranging from 2-20%, with no significant gender predilection.
- The microflora associated with black stain is rich in chromogenic bacteria, including Actinomyces and Prevotella melaninogenica.
- A notable observation is the lower incidence of dental caries in individuals with black stain.
Findings:
- The dark pigmentation is attributed to iron deposits, potentially ferric sulfate, resulting from a reaction between bacterial metabolism byproducts and iron.
- While the precise etiology remains unclear, the role of specific bacterial species and iron metabolism is implicated.
Implications:
- Understanding the diagnosis, etiology, and treatment of black stain is crucial for dental practitioners.
- Further research into the specific mechanisms of iron deposition and bacterial interactions could lead to targeted prevention and management strategies.
- This paper provides a comprehensive overview, including a case report, to aid in clinical decision-making regarding black stain.
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