Charles Warren owns Tempus Dental Laboratories Inc. and Wasatch Milling Center in Springville, UT. He has over 30 years of experience and is certified in ceramics, crown and bridge and dentures. He has done extensive research in the science of color and light; helped develop several porcelains and a pressable ceramic system; and serves as a consultant to several manufacturers. He is past president of the California Dental Laboratory Association and is a member of the American Prosthodontics Society, Academy of Esthetic Dentistry, AACD and more. He has lectured extensively across the world and authored several articles.