When restoring a class III cavity, the isolation required is usually:

When restoring a Class III cavity, the isolation required is usually minimal because of the location and type of the restoration. Class III cavities occur on the interproximal surfaces of anterior teeth, which means they are positioned between two teeth. This area often allows for easier access and visibility compared to other cavity classes, such as Class V, where the restoration may also need to consider the gingival margin.

Using minimal isolation techniques, such as dental dam or cotton rolls, is often sufficient to maintain a dry field and improve visibility during the procedure. This is significant because less extensive isolation can make the procedure less cumbersome for both the dentist and the dental assistant, while still ensuring that moisture control is achieved for the successful bonding of the restorative material.

In contrast, maximum and moderate isolation techniques are typically more involved and not necessary for a Class III restoration since the operative field is more accessible, and the risks of contamination are generally lower.