It is bone-like and light yellow. Cementum is the thinnest at the cementoenamel junction and is thickest at the apex. It is laid down throughout life and resting lines can be seen in histological sections. Continous cementum deposition maintains the length of the tooth as a physiologic compensation for occlusal wear. You will occasionally see heavy accretions of cementum on the roots of teeth extracted from older patients.
Acellular cementum is usually immediately adjacent to the dentin.
Excessive cementum deposition is called hypercementosis. You will see it on extracted teeth. Investing Structures , a very brief introduction. This is the soft specialized connective tissue located between the cementum covering the root of the tooth and the bone forming the alveolus, the bone of the tooth socket. Its average width is approximately 0.2 mm.