Extrinsic stainsExtrinsic stains

Amin AmusallamahAmin Amusallamah

Extrinsic stainsExtrinsic stains

• Extrinsic stains are defined as stains located on the outer surface of the tooth structure and caused by topical or extrinsic agents.

• Extrinsic stains are defined as stains located on the outer surface of the tooth structure and caused by topical or extrinsic agents.

The Nathoo classification system of extrinsic dental stain describes 3 categories

The Nathoo classification system of extrinsic dental stain describes 3 categories

1. Nathoo type 1 (N1): N1-type colored material (chromogen) binds to the tooth surface. The color of the chromogen is similar to that of dental stains caused by tea, coffee, wine, chromogenic bacteria, and metals.

1. Nathoo type 1 (N1): N1-type colored material (chromogen) binds to the tooth surface. The color of the chromogen is similar to that of dental stains caused by tea, coffee, wine, chromogenic bacteria, and metals.

Cont…Cont…

2. Nathoo type 2 (N2): N2-type colored material changes color after binding to the tooth. The stains actually are N1-type food stains that darken with time.

2. Nathoo type 2 (N2): N2-type colored material changes color after binding to the tooth. The stains actually are N1-type food stains that darken with time.

Cont…Cont…

3. Nathoo type 3 (N3): N3-type colorless material binds to the tooth and undergoes a chemical reaction to cause a stain. N3-type stains are caused by carbohydrate-rich foods (eg, apples, potatoes), stannous fluoride, and chlorhexidine.

3. Nathoo type 3 (N3): N3-type colorless material binds to the tooth and undergoes a chemical reaction to cause a stain. N3-type stains are caused by carbohydrate-rich foods (eg, apples, potatoes), stannous fluoride, and chlorhexidine.

Predisposing factorsPredisposing factors

• Certain factors predispose children and adults to extrinsic stains include:

1. Enamel defects2. Salivary dysfunction

3. poor oral hygiene.

4. Microscopic pits, fissures, and defects in the outer surface of the enamel are susceptible to the accumulation of stain-producing food, beverages, tobacco, and other topical agents.

• Certain factors predispose children and adults to extrinsic stains include:

1. Enamel defects2. Salivary dysfunction

3. poor oral hygiene.

4. Microscopic pits, fissures, and defects in the outer surface of the enamel are susceptible to the accumulation of stain-producing food, beverages, tobacco, and other topical agents.

Stained supragingival plaque and calculus deposits.

Severe tobacco staining.

Extrinsic dental staining by long-term of 0.12% T chlorhexidine M.W

 Red extrinsic stain at the G.M , I & IP regions with a habit of chewing pan

Pan is combination of betel nut and lime

Thank youThank youReverence Reverence

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