Final answer:
Since the 1940s, diamond burs have been used in dentistry for cavity preparation due to their effectiveness in cutting enamel and dentin.
Step-by-step explanation:
Since the 1940s, diamond burs have been used for cavity preparation in dental procedures. Diamond burs are preferred for their abrasiveness and efficiency in cutting through tooth enamel and dentin. These burs come in various shapes and sizes, allowing dentists to precisely remove decayed or damaged tooth material, shape tooth structure for fillings or crowns, and finish restorations to a smooth surface.