Periodontal Fiber Groups Flashcards
Periodontal fibers connect…
Tooth to bone
What are the groups of periodontal fibers?
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- Alveolar crest group
- Oblique group
- Horizontal group
- Interradicular group
- Apical group
Where does the alveolar crest group attach?
Radiates from the crest of the alveolar process and attaches itself to the vertical part of the cementum
What are the primary functions of the alveolar crest group?
- Retain teeth in the socket
- Oppose lateral forces
- Resist horizontal movement
Describe the orientation of the horizontal group?
Runs at right angles to the long axis of the tooth, from the cementum to the bone.
What is the primary function of the horizontal group?
- Restrain lateral tooth movement
- Resist horizontal movement
Describe the orientation of the oblique group
Runs upwardly (at an oblique angle) from the cementum to the bone
Which fiber bundles are the most numerous?
Oblique fibers
Which fiber bundles constitute the main attachment of the tooth?
Oblique fibers
What is the primary function of the oblique group?
-Resist axial forces and occlusal stress
Describe the orientation of the apical group
- Irregularly arranged
- Radiates from the apical region of the root to the surrounding bone
What are the primary functions of the apical group?
- Prevent tooth tipping
- Resist luxation (twisting)
- Protect the blood, lymph, and nerve supplies
- Resist forces trying to pull the tooth from its socket
Describe the orientation of the interradicular group
Runs from the crest of the interradicular septum to the furcation of the multi-rooted teeth
What is the primary function of the interradicular group?
- Resist tipping and twisting
- Resist forces trying to remove the tooth
