A surgical drill guide for installing dental implants with predetermined angular alignment and rotational orientation for a dental prosthesis, formed of a base part formed to correspond generally to the shape and contour of a patient's upper or lower mouth, the base part having opposite tissue and mouth sides and at least one drill guide hole extending through the base part from the tissue side to the mouth side, each of the drill guide holes having a central axis at a predetermined angular orientation relative to the mouth side, and a set of rotational position indicators on the tissue and mouth sides respectively of the base part for each of the drill guide holes.