1. Ceramic veneers: state of the art, 1999;Christensen;JADA,1999
2. Why all-ceramic crowns?;Christensen;JADA,1997
3. Porcelain-fused-to-metal vs. non-metal crowns;Christensen;JADA,1999
4. Intracoronal and extra-coronal tooth restorations, 1999;Christensen;JADA,1999
5. The high-speed hand-piece dilemma;Christensen;JADA,1999