Alveolar Bone Flashcards
What type of tissue is the Alveolar Bone?
Mineralised connective tissue.
Where is cancellous bone found?
-fills in spaces
-interdental
-interradicualar spaces
Where is compact bone found?
-lining of tooth socket
-provides attachment to PDL fibres
What’s the name of unmineralised organic bone matrix?
Osteoid
Name the cells present in the Alveolar Bone. (3)
Osteocytes
Osteoclasts
Osteoblasts
What’s the function of osteoblasts?
Bone forming cells
- secrete organic bone matrix (collagen I)
What’s the function of osteoclasts?
Break down bone
- bone resorbing cells
What’s the function of osteocytes?
Mature bone cells
What’re the components of the Alveolar Bone?
- hydroxyapatite crystals
- organic matrix (collagen I, produced by osteoblasts)
Which is more dense, cancellous or compact bone?
Compact bone
What’re the main processes in the bone remodelling cycle?
- Osteocytes ‘sense’ need for remodelling and are attracted to site
- Osteoclasts begin resorption + form cavity
- Mesenchymal stem cells appear along the cavity
- Stem cells proliferate + differentiate = osteoblasts
- Osteoblasts release Osteoid
How are incremental lines formed in the Alveolar Bone?
SMOOTH REGULAR LINE
- laid down gradually due to rate of bone deposition
REVERSAL LINE
- irregular ‘scalloped’ line
- marks where resorption has occurred
What’s the structure of the Alveolar Bone-PDL interface?
CEJ (Cemento-enamel junction)
- where enamel meets cementum
- at gingival line
What are the components of the ground substance in Alveolar Bone?
-GAGs
-proteoglycans & glycoproteins
-Osteoid (specifically in bone)
What does Osteoid consist of?
- collogen I
- proteoglycans & glycoproteins
