Dr. Christopher B. Marchack received a DDS degree from the University of the Pacifi c, School of Dentistry in 1987, and the Certifi cate in Prosthodontics in 1992 from the University of Southern California. He is an Associate Clinical Professor in dentistry at USC, and Adjunct Assistant Professor at the University of Pennsylvania. He is a member of the American College of Prosthodontists, Academy of Prosthodontics, Pacifi c Coast Society of Prosthodontists, and the Academy of Osseointegration. He is a recipient of the Judson Hickey Scientific Writing Award from the Editorial Council of the JPD. He lectures nationally and internationally on restorative dentistry and implant therapy and has a full-time practice, in Pasadena, California.