Final answer:
Contouring pliers are the instrument that contours a band around the tooth to allow for minimal exposed cement at the margins.
Step-by-step explanation:
The instrument that contours a band around the tooth to allow for minimal exposed cement at the margins is contouring pliers. These pliers are specifically designed to shape and adapt dental bands to fit snugly around the tooth, ensuring a proper seal and reducing the risk of cement exposure.
Contouring pliers have curved tips that allow for precise bending and shaping of the band material. By contouring the band to the tooth, the pliers help create a tight and secure fit, minimizing any gaps that could lead to cement exposure and potential issues.
Other instruments mentioned in the options have different functions:
- Band seater: Used to place the band onto the tooth.
- Bird-beak pliers: Used for bending and shaping archwires in orthodontic treatment.
- Band-removing pliers: Used to remove bands from teeth.