1. Ceramic brackets;Swartz;J Clin Orthod,1988
2. Ceramic brackets;Scott;J Clin Orthod,1987
3. The advent of ceramics;Phillips;J Clin Orthod,1988
4. Direct bonding in orthodontics—Review;Viazis;J Pedod,1986
5. Synthetic sapphire orthodontic bracket base strength;Watanabe;IADR,1988