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The periodontium (Figure 1.10) is the collective name for the supporting structures of the tooth.

Figure 1.10 The periodontium.

Source: From [6]. Reproduced with permission of Blackwell.

It comprises:

 Periodontal ligament.

 Cementum (part of the tooth and supporting structure).

 Alveolar bone (see later in chapter). This develops as the tooth erupts, forming the alveolus of the mandible and maxilla.

 Gingivae (gums).