For which procedure might a Class 4 laser be primarily used?

A Class 4 laser is a high-powered laser that is primarily used in medical and dental surgical procedures. This type of laser emits significant energy capable of cutting, vaporizing, or coagulating tissue. In dentistry, Class 4 lasers can be utilized for soft tissue surgeries, such as removing lesions or reshaping gums, as well as for hard tissue applications when appropriate.

In contrast, the other options pertain predominantly to therapeutic or cosmetic applications where lower-powered lasers (like Class 1 to Class 3) are typically employed. For instance, reducing tooth sensitivity can often be achieved with lower-powered lasers that aid in thermal and chemical processes without the need for the intense energy of a Class 4 laser. Similarly, teeth whitening is commonly done using LED lights or other types of light therapy rather than high-powered lasers. Managing dental hygiene, which could involve procedures like cleaning or preventive care, also does not typically require the surgical capabilities of a Class 4 laser, as this usually involves hand instruments or lower-powered lasers for soft tissue management.