1. A system, the system comprising: a computer having instructions that, when executed, cause the computer to: receive a 3D virtual model of a dental site comprising dental surfaces, wherein a portion of the dental site is obscured by a material, and manipulate the 3D virtual model to create an auxiliary 3D virtual model that includes a virtual representation of the portion of the dental site in which the portion is not obscured by the material; and a physical dental model of the dental site, wherein the physical dental model comprises a representation corresponding to the virtual representation of the portion of the dental site in which the portion is not obscured by the material.