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Questions and Answers
What is the primary function of acellular cementum?
What is the primary function of acellular cementum?
Which type of cementum is primarily found at the cervical margin of the tooth?
Which type of cementum is primarily found at the cervical margin of the tooth?
Which type of cementum is associated with adaptation and repair?
Which type of cementum is associated with adaptation and repair?
What type of fibers primarily make up acellular cementum?
What type of fibers primarily make up acellular cementum?
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In which region of the tooth is mixed cementum primarily located?
In which region of the tooth is mixed cementum primarily located?
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What is a key characteristic of cementum compared to bone?
What is a key characteristic of cementum compared to bone?
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How do cementocytes receive nourishment?
How do cementocytes receive nourishment?
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Which statement accurately describes cementicles?
Which statement accurately describes cementicles?
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What is the consequence of the limited blood and oxygen supply to cementocytes?
What is the consequence of the limited blood and oxygen supply to cementocytes?
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What distinguishes acellular cementum from cellular cementum?
What distinguishes acellular cementum from cellular cementum?
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Which feature is specific to cementum-enamel junction?
Which feature is specific to cementum-enamel junction?
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What is hypercementosis?
What is hypercementosis?
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Which type of cementum continuously remodels with the tooth's movement?
Which type of cementum continuously remodels with the tooth's movement?
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What is the primary function of cementoblasts in the formation of cementum?
What is the primary function of cementoblasts in the formation of cementum?
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Which type of fibers are incorporated into cellular cementum from the periodontal ligament when it becomes organized?
Which type of fibers are incorporated into cellular cementum from the periodontal ligament when it becomes organized?
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What characterizes cellular mixed fiber cementum compared to other types of cementum?
What characterizes cellular mixed fiber cementum compared to other types of cementum?
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How does the structure of cellular cementum compare to that of bone?
How does the structure of cellular cementum compare to that of bone?
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What type of cementum is typically distinguished by having a layer of cementoid on its surface?
What type of cementum is typically distinguished by having a layer of cementoid on its surface?
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Sharpey’s fibers are associated with which type of cementum structure?
Sharpey’s fibers are associated with which type of cementum structure?
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In which area is cellular cementum expected to be deposited more slowly during its formation?
In which area is cellular cementum expected to be deposited more slowly during its formation?
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Which statement about the cellular types found in cementum and bone is accurate?
Which statement about the cellular types found in cementum and bone is accurate?
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Study Notes
Cementum vs. Bone
- Cementum is avascular, not innervated, and does not form Haversian systems unlike bone
- Cementum's lower metabolic activity, due to limited blood and oxygen supply, affects its remodeling capacity
- Orthodontics utilizes the principle that bone resorbs more readily than cementum
Cellular Cementum vs. Bone
- Cementocytes have processes that communicate within canaliculi but do not form a syncytium
- Nourishment of cells occurs by diffusion from periodontal ligament vessels
Cementicles
- Round or ovoid calcified nodules found in the periodontal ligament
- Free in the ligament or attached to cementum surface
- More prevalent in older patients or in areas of trauma
Hypercementosis
- Excessive production of cellular cementum involving the apical 1/3 of the root
Types of Cementum
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Acellular (primary) cementum
- Extrinsic fibers initial
- Location from cervical margin to the apical third
- Anchorage function
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Cellular (secondary) cementum
- Intrinsic fibers
- Middle to apical third and furcations
- Adaptation and repair function
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Mixed cementum
- Intrinsic and extrinsic fibers
- Apical portion and furcations
- Adaptation and repair function
Acellular Cementum (Primary)
- Slow development during tooth eruption
- No incorporation of cementoblasts
- Fibroblasts from periodontal ligament form extrinsic fibers
- Cementoblasts secrete non-collagenous proteins
- Principal tissue of attachment at the cervical margin
Cellular Cementum (Secondary)
- Adaptive role in response to tooth wear/movement
- Associated with repair of periodontal tissues
Cellular Mixed Fiber Cementum
- Incorporation of fiber bundles into cellular cementum
- Presence of intrinsic and extrinsic fibers creating cellular mixed fiber cementum
- May be layered with acellular cementum
Cementoid
- Organic material that calcifies gradually
- Surface of cementum is always covered by cementoid and cementoblasts
Cellular Cementum vs. Bone (Further)
- Both tissues contain cells trapped in lacunae and surrounded by a mineralized matrix
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Description
Explore the differences between cementum and bone in this quiz. Learn about cellular structures, remodeling capacities, and implications in orthodontics. Understand the clinical significance of cementum types and related conditions like hypercementosis.
