Final answer:
Dentistry bonding has various functions including repairing teeth, improving aesthetics, and restoring teeth, but it does not address the concern of mercury toxicity as found in dental amalgams, which are composed of 50% mercury.
Step-by-step explanation:
The use of dentistry bonding in dental procedures has several functions, but one function it does not serve is related to the inclusion of mercury in dental amalgams. Dental amalgams containing silver and other metals have traditionally been used to fill cavities because they offer benefits such as low cost, ease of manipulation, and longevity. However, these amalgams are approximately 50% mercury by weight, a fact that has raised health concerns due to mercury's toxicity. Dental bonding can be used for repairing decayed teeth, improving cosmetic appearance, restoring chips or cracks, and even altering tooth shape. It is vital to note that the use of bonding does not involve direct concerns about mercury toxicity, as the materials used for bonding typically consist of composite resins free from mercury.