The development of the vascular bed of the marginal periodontium

The vascular bed of the periodontum of rat molars develops from the vascular network of the alveolar mucosa, from the vascular network of the enamel organ and from vessels which, with the development of roots, form the bed of the periodontal membrane. Although these vascular areas form a unity in a developed periodontium, they retain their differences in arrangement. During the formation of the enamel, the bed of the enamel organ is arranged in rat molars and in the permanently growing rat incisor according to the same principles. In both types of teeth, the principles of this arrangement correspond with the metabolic needs of amelogenesis.