Final answer:
A high-level disinfectant is necessary to kill spores in a dental office, as it is effective against a wide range of pathogens including endospores, achieving sterilization under appropriate conditions.
Step-by-step explanation:
In the context of a dental office, the product capable of killing spores is a high-level disinfectant. High-level germicides are effective against a broad spectrum of pathogens including vegetative cells, fungi, viruses, and importantly, endospores, which are the most resistant forms of bacterial life. This efficacy even extends to achieving sterilization under suitable conditions. In contrast, low-level disinfectants and bacterial soaps are primarily effective against only vegetative cells and some enveloped viruses, and cannot eliminate endospores. Therefore, for dental tools which come into contact with mucous membranes or are used in sterile areas of the mouth, a high-level disinfectant is necessary to ensure patient safety and compliance with health regulations.