Denplan For Denplan patients and anyone interested in dental healthcare. British Dental Health Foundation A charity dedicated to raising public awareness of dental and oral health and promoting good dental health practices. Better Oral Health A useful site for dental health information for the general public. South Durham Tooth Implants A service provided by Simon Allun's Onward House Dental Practice, near Darlington. Britesmile Official web site for the world's leading whitening system.