THE PRINCIPAL FIBERS OF THE PDL
#Dental_by_Hadeel
#Dental_by_Hadeel
One side of the periodontal space, the collagen
fibers are embedded into cementum while on the
other side they are attached to the alveolar bone.
fibers are embedded into cementum while on the
other side they are attached to the alveolar bone.
🔴ALVEOLAR CREST FIBER🔴
Attaches to the
cementumjust apical to the cemento-enamel junction
and runapically and laterally to insert into the surface of the alveolus.
Attaches to the
cementumjust apical to the cemento-enamel junction
and runapically and laterally to insert into the surface of the alveolus.
🔹The fibers originate from the crest of the alveolar
process to the cervical part of the cementum.
🔹 They retain the tooth in the alveolus, oppose
lateral forces and protect deeper periodontal
ligament structures.
process to the cervical part of the cementum.
🔹 They retain the tooth in the alveolus, oppose
lateral forces and protect deeper periodontal
ligament structures.
🟠HORIZONTAL FIBER🟠
Located just apical
to the alveolar crest group, these fibers run
perpendicularto the long axis of the root from
cementum to bone.
Located just apical
to the alveolar crest group, these fibers run
perpendicularto the long axis of the root from
cementum to bone.
🔹These fibers run at right angles to the long axis
of the tooth from the cementum to the alveolar
bone.
🔹 It opposes lateral forces.
of the tooth from the cementum to the alveolar
bone.
🔹 It opposes lateral forces.
🟡OBLIQUE FIBER🟡
The most numerous fiber
group ofthe periodontal ligament; run from the
cementumoutwardly and coronally to insert into the
bone.
The most numerous fiber
group ofthe periodontal ligament; run from the
cementumoutwardly and coronally to insert into the
bone.
🔹The bundles of theoblique group constitute the
main attachment of the tooth.
🔹These fiber bundles are most numerous.
🔹They run obliquely from thecementum to the
bone.
🔹 It opposes axially directed forces.
main attachment of the tooth.
🔹These fiber bundles are most numerous.
🔹They run obliquely from thecementum to the
bone.
🔹 It opposes axially directed forces.
🟢APICAL FIBER🟢
Radiates from the cementum
around the apex of the root to the adjacent bone.
Radiates from the cementum
around the apex of the root to the adjacent bone.
🔹The fibers radiate from the apical region of the
root to the surrounding bone.
🔹These bundles are irregularly arranged.
🔹They prevent tooth tipping, extrusion, protects
vessels and nerve supply to the tooth.
root to the surrounding bone.
🔹These bundles are irregularly arranged.
🔹They prevent tooth tipping, extrusion, protects
vessels and nerve supply to the tooth.
🔵INTERRADICULAR FIBER🔵
Found between the
roots of multirooted teeth,these fibers run from the
cementum into the crestal bone of the inter-radicular
septum.
Found between the
roots of multirooted teeth,these fibers run from the
cementum into the crestal bone of the inter-radicular
septum.
The bundles originate from the furcation area of
multirooted teeth to the crest of inter-radicular septum.
multirooted teeth to the crest of inter-radicular septum.
⭐ Summary ⭐
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