1. The tooth-whitening revolution;Christensen;JADA,2002
2. Direct restorative materials: what goes where?;Christensen;JADA,2003
3. Has tooth structure been replaced?;Christensen;JADA,2002
4. Porcelain-fused-to-metal vs. non-metal crowns;Christensen;JADA,1999
5. Computerized restorative dentistry: state of the art;Christensen;JADA,2001