Dr. Marc Lowenberg, Dr. Gregg Lituchy, and Dr. Brian Kantor are top cosmetic dentists who have transformed the smiles of many of the world's best-known actors, models, rock stars, authors, and other public figures. Since the 1980's, Dr. Lowenberg and Dr. Lituchy have been at the forefront of the field, with Dr. Kantor joining the practice in 2002.