Podcast
Questions and Answers
What is the primary characteristic of physiologic tooth migration?
What is the primary characteristic of physiologic tooth migration?
- Drift of teeth through the alveolar process. (correct)
- Inability of teeth to adapt to functional demands.
- A static and unchanging position of teeth within the jaw.
- Rejection of the supracrestal fibre system.
The turnover rate of the periodontal ligament (PDL) is uniform throughout the ligament.
The turnover rate of the periodontal ligament (PDL) is uniform throughout the ligament.
False (B)
What role do osteoclasts play during physiologic tooth migration?
What role do osteoclasts play during physiologic tooth migration?
resorption of alveolar bone
A slow __________ occurs on the cementum surface throughout life, which is important for the resorptive mechanism in the bone and cementum.
A slow __________ occurs on the cementum surface throughout life, which is important for the resorptive mechanism in the bone and cementum.
According to Stein and Weinmann, in which direction do molars gradually migrate in adults?
According to Stein and Weinmann, in which direction do molars gradually migrate in adults?
Loss of a neighboring tooth will not induce tooth movement.
Loss of a neighboring tooth will not induce tooth movement.
What coating protects the root surface during the physiologic migration?
What coating protects the root surface during the physiologic migration?
The depository side during bone modeling is characterized by __________ depositing nonmineralized osteoid.
The depository side during bone modeling is characterized by __________ depositing nonmineralized osteoid.
What happens to the older fibers of the PDL during physiologic tooth migration?
What happens to the older fibers of the PDL during physiologic tooth migration?
The tissue reaction that occurs during physiologic tooth migration is abnormal function of the supporting structures.
The tissue reaction that occurs during physiologic tooth migration is abnormal function of the supporting structures.
Match the cells with their role in physiological tooth migration:
Match the cells with their role in physiological tooth migration:
Which of the following is NOT a characteristic of the bone modeling processes during physiologic migration?
Which of the following is NOT a characteristic of the bone modeling processes during physiologic migration?
The supracrestal fiber system remains stationary when the teeth migrate.
The supracrestal fiber system remains stationary when the teeth migrate.
What happens to the number of osteoclasts when tooth migration is rapid?
What happens to the number of osteoclasts when tooth migration is rapid?
When teeth migrate, it implies remodeling of the __________ and modeling and remodeling of the alveolar bone.
When teeth migrate, it implies remodeling of the __________ and modeling and remodeling of the alveolar bone.
What is the importance of the nonmineralized precementum layer?
What is the importance of the nonmineralized precementum layer?
Physiologic tooth migration primarily involves the movement of teeth against functional demands that do not require adaptation.
Physiologic tooth migration primarily involves the movement of teeth against functional demands that do not require adaptation.
What characterizes the depository side of bone remodeling during physiological tooth migration?
What characterizes the depository side of bone remodeling during physiological tooth migration?
New __________ fibrils are produced on the bone surface simultaneously with the embedding of older PDL fibers in the bone.
New __________ fibrils are produced on the bone surface simultaneously with the embedding of older PDL fibers in the bone.
Which of the following activities is mainly associated with fibroblasts during physiologic tooth migration?
Which of the following activities is mainly associated with fibroblasts during physiologic tooth migration?
Flashcards
Physiologic Tooth Migration
Physiologic Tooth Migration
The gradual movement of teeth through the alveolar process due to functional demands and changes in occlusal pressure.
Adaptability of Dental Structures
Adaptability of Dental Structures
The ability of teeth and their supporting structures to adapt to functional demands placed upon them.
Mesial Drift
Mesial Drift
Molars in adults gradually shift towards the midline over time.
Supracrestal fiber system
Supracrestal fiber system
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PDL Turnover Rate
PDL Turnover Rate
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Osteoclasts
Osteoclasts
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Osteoblasts
Osteoblasts
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Cementum Apposition
Cementum Apposition
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Precementum Layer
Precementum Layer
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Study Notes
Physiologic Tooth Migration
- Teeth drift through the alveolar process adapting to functional demands.
- Changes in occlusal pressure, like losing a neighboring or opposing tooth, can cause tooth movement.
- Tissues react during physiologic migration through supporting structure function.
- Molars in adults gradually migrate mesially (Stein & Weinmann observation).
- Teeth bring the supracrestal fiber system along as they migrate.
- This movement involves remodeling of the periodontal ligament and alveolar bone.
- The periodontal ligament does not have a uniform turnover rate, cells are more active on the bone side compared to the cementum side.
Bone Modeling During Physiologic Migration
- Osteoclasts are present in scattered lacunae associated with the resorptive surface along the alveolar bone wall toward which the tooth is moving.
- The number of osteoclasts increases when tooth migration is rapid.
- Osteoblasts deposit nonmineralized osteoid on the depository side, which later mineralizes in the deeper layer.
- Older periodontal ligament fibers become embedded in newly deposited bone matrix.
- New collagen fibrils are produced on the bone surface simultaneously.
- Slow apposition occurs on the cementum surface throughout life.
- A nonmineralized precementum layer acts as a resorption-resistant “coating”, protecting the root surface during physiologic migration.
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