R00t Cementum:
The root cementum is a specialized mineralized tissue covering the root surface. The cementum does not contain any blood vessels, has no innervations, does not undergo physiologic resorption or remodelling, but is characterized by continuing deposition throughout life. The cementum attaches the PDL fibres to the root and contributes to the process of repair after damage to the root surface (e.g., during orthodontic treatment). During root formation a primary cementum is formed. After tooth eruption and in response to functional demands, a secondary cementum is formed, which in contrast to the primary cementum contains cells.
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(AEFC-acellular extrinsic fibre cementum) (CB-collagen bundles)