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2. The advent of ceramics;Phillips;J Clin Orthod,1988
3. Morphology of polycrystalline alumina brackets and its relationship to fracture toughness and strength;Kusy;Angle Orthod,1988
4. Ceramic brackets;Birnie;Br J Orthod,1940
5. Shear bond strength of metal brackets compared with a new ceramic bracket;Odegaard;Am J Orthod Dentofac Orthop,1988