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Questions and Answers
What type of fibers do dental implants contain?
What type of fibers do dental implants contain?
How is the periodontal ligament vascularized laterally?
How is the periodontal ligament vascularized laterally?
Which function does the alveolar crest fibre primarily serve?
Which function does the alveolar crest fibre primarily serve?
What is the main role of inter-radicular fibers?
What is the main role of inter-radicular fibers?
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Which of the following accurately describes the origin of alveolar crest fibers?
Which of the following accurately describes the origin of alveolar crest fibers?
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What additional role do the inter-radicular fibers provide apart from resisting movement?
What additional role do the inter-radicular fibers provide apart from resisting movement?
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Which statement regarding the gingival vascular supply to the periodontal ligament is correct?
Which statement regarding the gingival vascular supply to the periodontal ligament is correct?
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What is the fibrous component primarily associated with the support and stability of teeth?
What is the fibrous component primarily associated with the support and stability of teeth?
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Study Notes
Dental Implants
- Dental implants have alveologingival fibers and circular fibers.
Periodontal Ligament
- Vascularized laterally in the alveolar bone.
- Gingival vascular supplies the PDL apically.
- Supports multiple functions and is surrounded by scaffolding fibers.
Periodontal Ligament Fibres
| Fibre Type | Location | Origin | Insertion | Role |
|---|---|---|---|---|
| Alveolar crest | Beneath the junctional epithelium (JE) | Cementum below the cemento-enamel junction (CEJ) | Runs downwards and outwards, inserts into the alveolar crest | Prevents tooth extrusion, resists lateral, tilting, and intrusive tooth displacement |
| Inter-radicular | Found in multi-rooted teeth | Cementum | Inter-radicular septum | Resists vertical and lateral movement; resists tipping, torquing, and luxation. Periodontal disease can lead to the total loss of fibers. |
Periodontal Ligament Function
- Maintains width through formative and resorptive processes.
- Formative: cementoblasts and osteoblasts build and repair bone and cementum.
- Resorptive: degrades old cells, maintaining periodontal ligament (PDL) space.
Periodontal Ligament Cells
- The periodontal ligament is rich in various cell types.
- Examples of resorptive cells include osteoclasts and cementoclasts.
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