Sharpey’S Fibers And Tooth Support: Structure, Function, And Clinical Relevance

Sharpey’S Fibers And Tooth Support: Structure, Function, And Clinical Relevance

Question 1. Periodontal ligament.
Answer:

• It is soft, specialized connective tissue situated between the cementum covering the root of the tire tooth and the bone forming the socket wall.
• Width: 0.15 – 0.38 mm.

Periodontal ligament Cells:

1. Synthetic cells

1. Osteoblasts
2. Fibroblast
3. Cementoblast.

2. Resorptive cells.

1. Osteoclast
2. Fibroblast
3. Cementoclast

3. Progenitor cell.

4. Epithelial rest of malassez.

5. Defense cells.

• Macrophages
• Eosinophils.

Periodontal ligament Functions:

• Supportive
• Sensory
• Nutritive
• Homeostatic
• Eruptive
• Physical

Question 2. Cells of periodontal ligament.
Answer:

Question 3. Sharpey’s fibers.
Answer:

• These are collagen fibers that are embedded into the cementum on one side and into the alveolar bone on another side.
• Fibers in primary acellular cementum are fully mineralized while those in cellular cementum and bone are partly mineralized.
• Their mineralized part appears as a projecting covered with mineral clusters.
• Few of them pass uninterrupted through the alveolar bone to continue as principal fibers of PDL.
• It passes through alveolar bone only when it consists entirely of compact bone.
• It consists of noncollagenous proteins like osteopontin and bone sialoprotein.