Final answer:
A finishing bur has more blades than a restorative bur, providing a smooth final polish on dental restorations. These burs are essential in dental work for patient comfort and restoration longevity.
Step-by-step explanation:
A finishing bur has more blades on the working end than a restorative bur because it is used for the final stage polishing of a restoration. The increased number of blades allows for a smoother, more refined finish on the dental material, which is critical for patient comfort and the longevity of the restoration.
A restorative bur typically has fewer blades and is designed for cutting and shaping tooth structure and restoration materials during the earlier phases of dental procedures. In finishing dental work, precision and attention to detail are paramount, leading to the necessity for tools like finishing burs that can achieve a high polish and fine aesthetics.