Transseptal fibers: extend interproximal over the alveolar bone and embed in cementum of adjacent teeth
Alveolar crest: extend obliquely from the cementum to the alveolar crest
Horizontal fibers: attach to the cementum apical to the alveolar crest fibers and run perpendicularly from the root of the tooth to the alveolar bone
Oblique fibers: run from cementum in an oblique direction to insert into bone coronally
Apical fibers: radiating from cementum around apex of root of bone, forming base of socket
Interradicular fibers: found at the furcation of a tooth root and attach from the cementum to the alveolar bone.
