Periodontal ligaments are structures holding teeth in their sockets. They are seen as a thin radiolucent space between the surface of the tooth root and the lamina dura, the lining of the tooth socket. The lamina dura serves as a periodontal ligament attachment site.
They comprise soft connective tissue between the inner wall of the alveolar socket and the roots of the teeth and consists of collagen bands connecting the cementum of teeth to the gingivae and alveolar bone.
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