... techniques involve the use of a customized mouth tray with carbamide peroxide gels as the bleaching medium (Fasanaro 199 2; Haywood 199 2; Haywood 199 2; Kielbassa, Attin, et al., 199 5; Attin, ... contact of H2O2 with tissues (Floyd and Carney, 199 2; Smith, Carney, et al., 199 2; Stadtman, Starke-Reed, et al., 199 2; Li, Yan, et al., 199 8) should be avoided. Care should be taken to minimize ... et al., 2012; Peters, 2 004; Walia, Brantley, Gerstein, 198 8), can create centered preparations more rapidly (Short, Morgan, Baumgartner, 199 7; Glossen, et al., 199 5), and can produce tapered...