What is the technique to use when removing ortho cement with a rotary instrument?

The technique of sweeping mesial to distal when removing ortho cement with a rotary instrument is based on the anatomy of the teeth and the direction in which the enamel surface is most effectively cleaned without risking damage to the tooth or surrounding tissues. This method allows for controlled removal of the adhesive, minimizing the chance of causing stress or trauma to the enamel.

When using a rotary instrument, the mesial to distal sweep aligns with the natural contours of the tooth, allowing for better access to cement that may be located in hard-to-reach areas. This technique helps to ensure an efficient and thorough cleaning process while also providing stability to the instrument's movement.

In contrast, other techniques, such as sweeping only occlusally, may not adequately address all areas where the cement may be present. Similarly, sweeping in circular motions may result in uneven removal of the cement and potentially increase the risk of damaging tooth structure. The vertical sweep, while useful in some contexts, does not provide the same level of thoroughness required for effective ortho cement removal.