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Questions and Answers
What is primarily involved in the remodelling of bone during orthodontic tooth movement?
What is primarily involved in the remodelling of bone during orthodontic tooth movement?
What stimulates the remodelling of bone in response to orthodontic forces?
What stimulates the remodelling of bone in response to orthodontic forces?
What effect is associated with changing the shape of a crystalline material?
What effect is associated with changing the shape of a crystalline material?
What roles do rhythmic electric pulses play in bone during periods of function?
What roles do rhythmic electric pulses play in bone during periods of function?
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How does fluid behave under heavy biting pressure in the periodontal ligament?
How does fluid behave under heavy biting pressure in the periodontal ligament?
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Study Notes
Prolonged Tooth Pressure Movement
- Tooth movement involves the remodelling of the tooth socket, crucial for orthodontic treatment.
- Bone remodelling occurs around the periodontal ligament, entailing both apposition (building) and resorption (loss) of bone.
- The periodontal ligament undergoes reorganisation during tooth movement.
Stimuli for Bone Remodelling
- Changes in blood flow to the periodontal ligament (PDL) serve as a key stimulus for bone remodelling.
- The piezo-electric effect, potentially tied to biological electricity, may also play a role in this process.
The Piezo-Electric Effect
- The piezo-electric effect refers to the generation of an electrical current when crystalline materials, such as bone, change shape under stress.
- This effect is significant in skeletal tissues, potentially influencing bone remodelling and health.
Piezo-Electricity in Bone
- Sources of piezo-electricity in bone include bone minerals and collagen.
- Mechanical activities like chewing and walking generate rhythmic electric pulses that help maintain bone mineralisation.
Time Course of Events Under Heavy Biting Pressure
- Initial response to heavy biting pressure occurs within milliseconds, characterized by the incompressibility of fluid in the periodontal ligament.
- Over seconds, fluid leaks out of the periodontal ligament, facilitating movement and remodelling processes.
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Description
This quiz covers the biological mechanisms involved in orthodontic tooth movement, focusing on the remodelling of the tooth socket and the role of the periodontal ligament. Explore the factors stimulating bone remodelling and the significance of piezo-electric effects in orthodontics. Test your knowledge on the fundamentals of orthodontic biology.
