OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - Int J Periodontics Restorative Dent JT - International Journal of Periodontics & Restorative Dentistry IS - 1945-3388 (Electronic) IS - 0198-7569 (Print) IP - 5 VI - 42 PST - ppublish DP - 2022 PG - 675-681 LA - en TI - Effects of Two In-Office Bleaching Agents with Different Compositions on the Bond Strength to Enamel LID - 10.11607/prd.5943 [doi] FAU - Marski, Silvia Renata AU - Marski S FAU - Ramos da Silva, Thamires Fortes AU - Ramos da Silva T FAU - Andrade Balduino, Maria Luiza AU - Andrade Balduino M FAU - de Lima, Carolina Oliveira AU - de Lima C FAU - Simão, Renata Antoun AU - Simão R FAU - Prado, Maíra AU - Prado M CN - AB - This study evaluates the effect of two in-office bleaching agents with different compositions on the bond strength to enamel surface. Fifty bovine teeth were divided into five groups (n = 10 teeth per group), according to the bleaching agent used and the time elapsed to perform the restorative procedures: restorative procedures performed without bleaching (control group); bleaching with 35% hydrogen peroxide (HP), with restorative procedures 24 hours or 7 days after bleaching (HP/24h and HP/7d groups, respectively); and bleaching with 35% HP with calcium compost, with restorative procedures 24 hours or 7 days after bleaching (HP AutoMixx/24h and HP AutoMixx/7d groups, respectively). The specimens were stored at 37°C in artificial saliva. Restored teeth were submitted to a micro-shear bond strength test. The specimens were analyzed using a stereoscope to determine the fracture pattern, classified as adhesive, cohesive, or mixed. The results of the bond strength test were evaluated by analysis of variance, with significance set at P < .05. The groups showed similar bond strength values without significant difference among them (P > .05). There was a predominance of the adhesive-type fracture pattern in all groups. The bleaching agents with different compositions showed similar bond strength values when the restoration was performed 24 hours and 7 days after bleaching, and the results were similar to the control group. AID - 3375233