What implement can be used to treat corrugations on the nail?

Using a nail buffer to treat corrugations on the nail is effective because a buffer smooths and polishes the surface of the nail. Corrugations—those ridges or grooves on the nail—can often be improved by buffing, as it helps to gently smooth out unevenness and enhance the nail's appearance. Buffers often have varying grits, allowing for a more controlled approach to addressing surface imperfections.

In contrast, other implements such as nail clippers, cuticle pushers, and nail files serve different purposes. Nail clippers are designed for trimming the length of the nails, while cuticle pushers are primarily used for caring for the cuticles and do not address surface irregularities. Nail files can help shape the edges of the nails but are not specifically designed for smoothing out ridges like a buffer is. Therefore, a nail buffer is the most appropriate tool for effectively managing corrugations on the nail.