牙醫學(六)（包括齒顎矯正學、兒童牙科學、牙科公共衛生學等科目及其相關臨床實例與醫學倫理）題庫下載題庫

Criteria for Dean’s Classification System for Dental Fluorosis (1942)

Classification
Normal
Code 0
Criteria –The enamel represents the usual translucent semivitriform type of structure. The surface is smooth, glossy and usually of pale creamy white colour 

Questionable
Code 1
Criteria – The enamel discloses slight aberrations from the translucency of normal enamel, ranging from a few white flecks to occasional white spots. This classification is utilised in those instances where a definite diagnosis is not warranted and a classification of ‘normal’ not justified 

Very Mild
(10-25% of surface)
Cod...

Criteria for Dean’s Classification System for Dental Fluorosis (1942)

Classification
Normal
Code 0
Criteria –The enamel represents the usual translucent semivitriform type of structure. The surface is smooth, glossy and usually of pale creamy white colour 

Questionable
Code 1
Criteria – The enamel discloses slight aberrations from the translucency of normal enamel, ranging from a few white flecks to occasional white spots. This classification is utilised in those instances where a definite diagnosis is not warranted and a classification of ‘normal’ not justified 

Very Mild
(10-25% of surface)
Code 2
Criteria – Small, opaque, paper white areas scattered irregularly over the tooth but not involving as much as approximately 25 per cent of the tooth surface. Frequently included in this classification are teeth showing no more than about 1 – 2mm of white opacity at the tip of the summit of the cusps, of the bicuspids or second molars. 

Mild
(25-50% of surface)
Code 3
Criteria – The white opaque areas in the enamel of the teeth are more extensive but do involve as much as 50 percent of the tooth. 

Moderate
(100% of surface)
Code 4
Criteria – All enamel surfaces of the teeth are affected and surfaces subject to attrition show wear. Brown stain is frequently a disfiguring feature 

Severe
(100% of surface)
Code 5
Criteria – All enamel surfaces are affected and hypoplasia is so marked that the general form of the tooth may be affected. The major diagnostic sign of this classification is discrete or confluent pitting. Brown stains are widespread and teeth often present a corroded-like appearance.