What Design of Bur Is a 557 and What Is

question 26

Multiple Choice

What design of bur is a 557 and what is its use?

• A)Round bur: gains entrance into tooth structure
• B)Straight fissure cross-cut: forms internal walls of the preparation
• C)Inverted cone: forms retention grooves
• D)Pear: extends cavity preparation

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Definitions:

Neural Message

The information conveyed by neurons through electrical and chemical signals across synapses to communicate with other neurons, muscles, or glands.

Resting Potential

The electrical charge difference across the neuronal membrane when the neuron is not actively firing.

Action Potential

A brief electrical impulse by which information is transmitted along the axon of a neuron.

Wernicke's Aphasia

A language disorder caused by damage to the Wernicke's area of the brain, leading to difficulty in understanding spoken language and producing coherent sentences.