Orthodontic Assistant Practice Exam

Question: 1 / 400

What effect does placing a wire upside down on tooth #8 have?

Intrude

Extrude

Placing a wire upside down on tooth #8 will lead to extrusion, which means that the tooth will be pushed outward or away from the alveolar bone towards the occlusal surface. When a wire is implemented improperly, such as being inverted, the intended forces on the tooth are altered. An inverted wire can create a situation where the direction of the applied force leads to the movement of the tooth away from the jawbone instead of an intended movement like intrusion, which would occur if the wire was correctly aligned.

Understanding the mechanics of orthodontic appliances is crucial; the orientation of the wire significantly affects the resultant movements of the teeth. When the wire's angulation is inverted, rather than applying an intrusive force (which would move the tooth towards the bone), it inadvertently applies a force that leads to extrusion, promoting an outward movement instead.

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