Dr. Levin's Phi Dental Grid is a phi-based software grid that provides a guide to application of phi, 1.618..., the golden proportion, to cosmetic dental aesthetics. The program provides a transparent overlay to any digital image on your PC's screen, which for dental applications is generally a digital photo of the frontal view of a patient's teeth, mouth, lips and tip of the nose. The overlay incorporates the proportions and principles Dr. Eddy Levin, whose work is compulsory study in many American Dental Schools and is applied in dental cosmetics and surgeries. The grid can be resized to match any photo. Using the central tooth as the base measure, it then quickly and easily reveals the most aesthetically pleasing proportions for the lateral, canine and pre-molar teeth.