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Questions and Answers
What is pigmentation defined as?
What is pigmentation defined as?
- The process of removing pigments from oral tissue
- The process of deposition of pigments in oral tissue (correct)
- The process of producing melanin in skin
- The process of breaking down melanin in skin
What is the term for cells responsible for producing melanin?
What is the term for cells responsible for producing melanin?
- Melanocytes (correct)
- Keratinocytes
- Fibroblasts
- Melanophages
What is hyperpigmentation caused by?
What is hyperpigmentation caused by?
- The deposition of pigments in oral tissue
- The deposition of excessive pigments in oral tissue (correct)
- The absence of melanin production
- The removal of melanin from oral tissue
What is the result of excessive melanin production?
What is the result of excessive melanin production?
What is the role of melanocytes in oral tissue?
What is the role of melanocytes in oral tissue?
What is thought to stimulate an increase in melanin production in the basal cell layer of the epithelium, leading to oral hyperpigmentation?
What is thought to stimulate an increase in melanin production in the basal cell layer of the epithelium, leading to oral hyperpigmentation?
What type of pigmentation is characterized by blotchy pigmentation on the face and nipples during pregnancy?
What type of pigmentation is characterized by blotchy pigmentation on the face and nipples during pregnancy?
In which population is basilar melanosis more common?
In which population is basilar melanosis more common?
What is the term for the pigmentation that occurs in response to hormonal changes during pregnancy?
What is the term for the pigmentation that occurs in response to hormonal changes during pregnancy?
What is the term for the increased melanin production in the basal cell layer of the epithelium?
What is the term for the increased melanin production in the basal cell layer of the epithelium?
What is the main cause of oral post-inflammatory pigmentation?
What is the main cause of oral post-inflammatory pigmentation?
What layer of the epithelium is affected by oral post-inflammatory pigmentation?
What layer of the epithelium is affected by oral post-inflammatory pigmentation?
What is the term for the discoloration of the oral mucosa caused by an excess of melanin production and deposition?
What is the term for the discoloration of the oral mucosa caused by an excess of melanin production and deposition?
What is the result of an excess of melanin production and deposition in the oral mucosa?
What is the result of an excess of melanin production and deposition in the oral mucosa?
What is the term for drug-induced hyperpigmentation that affects the oral mucosa?
What is the term for drug-induced hyperpigmentation that affects the oral mucosa?
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Study Notes
Drug-Induced Hyperpigmentation
- Oral post-inflammatory pigmentation (OPP) is a discoloration of the oral mucosa caused by an excess of melanin production and deposition within the basal layer of the epithelium.
Pigmentation
- Pigmentation is defined as the process of deposition of pigments in oral tissue.
- Types of pigments that may cause hyperpigmentation include:
- Melanin
Melanocytes
- Melanocytes are responsible for melanin production.
Etiology
- The lesion is thought to represent an increase in melanin production in the basal cell layer of the epithelium stimulated by tobacco.
Physiological Pigmentation
- Racial pigmentation: melanin is present in the basal cell layer of epithelium in people of African descent (basilar melanosis).
- Pregnancy-related pigmentation: blotchy pigmentation on the face, nipples (melasma).
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