The general order of eruption of the primary dentition is illustrated diagrammatically: central incisor, lateral incisor, first molar, canine, and second molar, with the mandibular pairs preceding the maxillary teeth.

The loss of the deciduous teeth tends to mirror the eruption sequence: incisors, first molars, canines, and second molars, with the mandibular pairs preceding the maxillary teeth. 

Susceptibility to dental caries is a function of exposure time to the oral environment and morphological type. However, the relative susceptibility of different tooth surfaces is a complex problem.

Although dental caries of the primary dentition and loss of these teeth are sometimes thought of erroneously as only an annoyance, this belief fails to acknowledge the role of the primary teeth in mastication and their function in maintaining the space for eruption of the permanent teeth. 

A lack of space associated with premature loss of deciduous teeth is a significant factor in the development of malocclusion. 

The development of adequate spacing is an important factor in the development of normal occlusal relations in the permanent dentition.

Thus there should be no question of the importance of preventing and treating dental decay and providing the child with a comfortable functional occlusion of the deciduous teeth. 

Therefore, in this book the primary teeth are described in advance of the permanent dentition so that they may be given their proper sequence in the study of dental anatomy and physiology.

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