1. Fracture toughness and surface cracks—the key to understanding ceramic brackets;Scott;Angle Orthod,1988
2. Ceramic brackets;Swartz;J Clin Orthod,1988
3. Letter: ceramic bracket survey;Lindquist,1989
4. Brittle fracture behavior of ceramics;Freiman;Ceramic Bull,1988
5. The fracture strength of ceramic brackets: a comparative study;Flores;Angle Orthod,1990