Figure 1: The schematic overview of the tissue types in the root-close periodontal membrane. The tissue types within the blue circle marked is root dentine (light grey), cementum (dark grey), innervation layer close to the cementum (yellow dots), and covering the innervation layer is a fiber layer (green crosses). Outermost in the root-close membrane are oblong ectodermal tissue components, Malassez's epithelium (dark red). Light red contours indicate surrounding vessels. The parallel lines to the left indicate the loose periodontal tissue layer