A Beautiful Smile is Just a Visit Away. Dr. William E. Gonce DDS in Hockessin DE, is a dentist providing dental procedures such as cleanings, dental crowns, teeth whitening, dental implants, and porcelain veneers in Hockessin. Dr. William E. Gonce is licensed as a general dentist in the state of Delaware. When you have cosmetic dentistry needs, you want to turn to a professional who listens and responds; an experienced doctor who knows the field and can effectively diagnose and treat your needs; a friendly dentist who counsels you on the best ways to maintain and improve your health. Our dentist(s) meet all these criteria. Plus, you benefit from a dedicated team of trained professionals who give you the individualized attention you deserve.