Saturação de oxigênio pulpar em incisivos centrais superiores hígidos submetidos ao clareamento dentário: ensaio clínico randomizado

• Ano de defesa: 2018
• Autor(a) principal: Lima, Lorena Ferreira de
• Orientador(a): Alencar, Ana Helena Gonçalves de
• Banca de defesa: Alencar, Ana Helena Gonçalves de, Estrela, Carlos, Baratto Filho, Flares, Silva, Julio Almeida da
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Programa de Pós-graduação em Ciências da Saúde (FM)
• Departamento: Faculdade de Medicina - FM (RG)
• País: Brasil
• Palavras-chave em Português: Oximetria; Clareamento dentário; Polpa dentária
• Palavras-chave em Inglês: Oximetry; Tooth bleaching and pulp
• Área do conhecimento CNPq: CIENCIAS DA SAUDE::ODONTOLOGIA
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tede/8664

Aim: To evaluate the oxygen saturation level (SaO 2 ) of the pulp of the central upper incisors, before, during and after the performance of the combined technique of toothbleaching by means of pulse oximetry. Materials and methods: This was a randomized, triple blind clinical trial, in which the initial sample consisted of 80 patients aged 18 to 27 years, 160 central incisors healthy upper randomly allocated into 4 groups: G1 - Office bleaching with two applications hydrogen peroxide (H 2 O 2 ) at 35% for 20 minutes each, followed by home bleaching with carbamide peroxide 10% for 2 hours a day for 16 days; G2 - Protocol used in G1, with the use of a desensitizer in the dentifrice; G3 - Office bleaching with application of H 2 O 2 at 35% and one placebo gel, both for 20 minutes, followed by application to home bleaching with carbamide peroxide 10% for 2 hours a day for 16 days; G4 - Protocol used in G3, with use of desensitizer in the dentifrice. The measurement at SaO 2 of the pulp was performed on the upper central incisors before (T0) and immediately after (T1) the office bleaching; in the 5 th (T2), 8 th (T3), 12 th (T4) and 16 th day of home bleaching (T5); and after 7 (T6) and 30 (T7) days of completion of procedures. The mean level of SaO 2 pulp was described by mean and standard deviation. times and the average values ​​of saturation in groups by Estimations Generalized Equations model were compared (GEE) and used the Student t test for paired samples for analysis of overall average initial time (T0) and after thirty days after the end of tooth bleaching (T7) (p <0.05). Outcomes: The final sample consisted of 60 patients (n = 120 teeth), G1 (n = 28), G2 (n = 40), G3 (n = 26) and G4 (n = 26). The results showed a mean pulp SaO 2 level at G0 of 84.29%, G2 of 84.38%, G3 of 84.79% and G4 of 85.83%. There was a reduction of T0 for T1, 81.96%, 82.06%, 82.19% and 81.15% for G1, G2, G3 and G4, respectively, with difference in G4 (p = 0.006). During home bleaching, there was returned of the pupal oxygen saturation level in all groups, with mean values in T7 of 86.55%, 86.60%, 85.71%, 87.15% for G1, G2, G3 and G4, respectively, with difference in G2 (p = 0.004). Conclusion: The average level of initial pulp oxygen saturation for central upper incisors was 84.76%, with changes in saturation during the combined technique of tooth bleaching and final mean level, after 30 days, of 86.52%.