Mechanics of Tooth Movement Flashcards

1
Q

Where is the center of resistance during tooth movement? What happens if tooth has perio problems? Root resorption?

A

Normal- center of the root that is bound to bone
Perio- center moves apically
Root resorption- center moves occlusally

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2
Q

lowest effort and easiest tooth movement

A

uncontrolled tipping

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3
Q

very difficult movement to achieve, moving root through bone while keeping crown steady

A

root torque

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4
Q

the tooth’s resistance to unwanted movement

A

anchorage

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5
Q

Why is light force preferred in orthodontics?

A

has less anchorage toll/unwanted reaction movement

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6
Q

Light force is preferred in orthodontics because it has less anchorage toll/unwanted reaction movement. What determines which movement dominates?

A

PDL surface area of teeth –> more PDL area means more anchorage to resist tooth movement

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7
Q

Which teeth are less resistant to tooth movement? anterior or posterior

A

anterior (less PDL surface area)

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8
Q

occurs when there is equal anchorage (PDL surface area in equal), useful in diastema closure

A

reciprocal anchorage

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9
Q

uses temporary anchorage devices (TADs) that are screwed into the bone and should not move to act like ankylosed teeth

A

skeletal anchorage

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10
Q

bone screws vs bone plates in TADs

A

Bone screws- screwed into alveolar, used to move individual teeth, less invasive than bone plates

Bone plates- multiple screws attached to basal bone for extensive tooth

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11
Q

minimum age for TAD placement

A

11 yo

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