True or false. Intermediate cementum has harder consistency than dentin.
Thin clear zone between granular layer and primary cementum?
Hyaline layer of Hopewell-Smith
Type of cementum laid down during root formation?
Type of cementum laid down after eruption and throughout life?
Cementum becomes about 3 times thicker between __ and __ yrs of age.
11 and 76
Sharpey's fibers are formed by the?
Fibroblast of periodontal ligament
Describe the direction of sharpeys fibers.
Perpendicular to cementum
Affects the direction of the extrinsic fibers? (2)
- Mesial migration
Intrinsic fibers are formed by the?
Describe the direction of intrinsic fibers of cementum?
Parallel to cementum
Growth lines of cementum?
Incremental lines of Salter
Ground substance of cementum is composed of? (3)
Cells lining the root surface?
Type of cementoblasts?(2)
- Active cemetoblast
- Resting cementoblasts
Cementoblasts that are trapped in the lacunae?
Where do you expect the canaliculi positioned?
Towards the PDL for nutrients
Types of cementoenamel junction? (3)
- Butt joint
CEJ type which occurs 60% of the time?
Type of CEJ:
When cementum meets enamel forming a distinct CEJ?
Butt joint (30%)
Type of CEJ:
Where root dentin is exposed?
Determines the size and shape of roots?
Induces root dentin formation?
Side note: presence of root dentin --> HERS break --> cells of dental follicle come in contact with dentin -->
Multipotential cells differentiate into cementoblasts :)
Cementoid or precementum
What cells make the ground substance and intrinsic fibers of cementum?
True or false. Acellular cementum is laid down more slowly.
True or false. Root is easier to extract if cementum is fused.
Excessive amount of cementum?
Hypercementosis is caused by overproduction of what type of cementum?
Overgrowth of cementum found in functional teeth?