Approximately on what third of the tooth should orthodontic bands fit?

Orthodontic bands are designed to fit primarily in the middle third of the tooth. This placement is essential for several reasons. First, the middle third of the tooth provides a stable area that can support the forces applied during orthodontic treatment. By fitting in this central area, the bands are less likely to interfere with the functional movements of the teeth, such as occlusion and closure.

Additionally, positioning the bands in the middle third ensures that they are appropriately aligned with the archwire and other orthodontic appliances, facilitating effective tooth movement. The middle third allows for optimal bonding with the cement used to secure the bands, reducing the risk of loosening and ensuring durability throughout the treatment phase.

Other options, such as the top or bottom third, would not afford the same level of stability or effectiveness in orthodontic treatment. Fitting bands on the entire surface is impractical and unnecessary, as the focus is on the precise fit that allows for effective force application without excessive bulk or interference.