Final answer:
The use of abrasives in dentistry both in toothpaste and in orthodontic brackets like zirconia spheres applied to aesthetical brackets is for improving adhesion, cosmetic appearance, and cleaning effectiveness.
Step-by-step explanation:
The process described of spraying the base of the aesthetic bracket with microcrystals of zirconia spheres is an example of using an abrasive material to enhance adhesion. In dentistry, abrasives are commonly used for their polishing action. This action can cause a small amount of enamel erosion but is effective in removing stains from tooth surfaces. Although abrasives like powdered white mica add a cosmetically pleasing glittery shimmer to toothpaste, their primary purpose in oral health care products is to assist in the removal of plaque and calculus. The zirconia spheres similarly enhance the grip of dental brackets, which could improve the experience of orthodontic treatments by ensuring the brackets stay in place more securely and can be removed with more ease.