Which instrument is typically used for lingual reduction during veneer preparation?

The football-shaped diamond bur is the instrument typically used for lingual reduction during veneer preparation due to its unique shape and cutting efficiency. This bur allows for a broader working surface that is particularly beneficial for accessing and reducing the lingual surface of the teeth effectively. Its contours help to create the necessary reduction while maintaining the integrity of adjacent tooth structures, which is essential in veneer preparations to ensure proper bonding and aesthetic outcomes.

The design of the football-shaped bur facilitates smooth and controlled reduction of the tooth structure, making it appropriate for achieving the desired thickness of the enamel for veneer placement. This ensures that adequate space is created for the veneer material while minimizing removal of more tooth structure than necessary.