Mechanism of Human Tooth Eruption: Review Article Including a New Theory for Future Studies on the Eruption Process
Schematic drawing of the cell layer in the root-close part of the periodontal membrane. D is root dentin and the cement layer C is marked on the surface. A layer of peripheral nerves (yellow dots) is seen the closest to the cement layer. Above is a dense fibre layer of ectomesenchymal origin (green lines) and outermost towards the more loose periodontal membrane the epithelial rests of Malassez are located (reddish-brown). This structured layer is called the peri-root sheet. Inserted in the figure are previously published histological sections showing the three cell layers .