Prostheses and methods for treating spinal pathologies and more specifically, for treating articulating surfaces of facet joints. The system includes a superior implant that is configured for placement on a superior articulating facet surface and an inferior implant that is configured for placement on an inferior articulating facet surface. The method includes creating a space between a superior and an inferior articular facet, such as by using a rasp, and fixing superior and inferior implants to the superior and inferior articular facets.