The areas generally affected are- 1. In fissures, pits and grooves on the occlusal surface of the teeth. 2. In proximal surfaces. 3. At the gingival third of facial and lingual surfaces. 4. Following the recession of epithelial attachment into the cementum at or near the junction of the enamel and cementum. Rapid caries is seen in children. Slow caries occurs in adults and older people. The disintegration of the tooth surface is so slow that it may extend over a period of years. The color of dentine in slow caries is usually dark brown. Proximal caries begins at or below the contact point. In rapid caries there is seen at the site a loss of polish and translucency with the formation of a white chalky spot. Cervical caries is seen on the labial or buccal surface. Arrested caries usually occurs in children. The teeth usually affected are the deciduous molars. Hypoplastic teeth are a predisposing factor. The commonest of complaints with which a patient of dental caries present himself is toothache. It is the severest kind of neuralgia.
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