Article
Dental bleaching gels do not alter the surface roughness and microhardness of feldspathic porcelain
A rugosidade e a microdureza da superfície de porcelana feldspática não são alteradas pelo clareamento dental
Registro en:
SOUZA, Danyelle Cambraia Franco de et al. Dental bleaching gels do not alter the surface roughness and microhardness of feldspathic porcelain. Revista Gaúcha de Odontologia, Campinas, v. 68, p. 1-5, nov. 2020.
0103-6971
10.1590/1981-863720200004920190053
Autor
Souza, Danyelle Cambraia Franco de
Gonçalves, Lisia Aparecida Costa
Gasque, Kellen Cristina da Silva
Moretti, Ana Beatriz da Silveira
Silva, Bruno Franciel da
Moretti Neto, Rafael Tobias da
Resumen
Objetivo: Avaliar se dois géis clareadores diferentes afetam a microdureza e a rugosidade superficial de corpos de prova de cerâmica
feldspática, in vitro. Métodos: um total de 48 discos de porcelana feldspática IPS In Line (Ivoclar-Vivadent) (16 / grupo de tratamento)
foram imersos em água destilada (Grupo I, Controle não tratado, ONU), ou tratados com os géis clareadores: Opalescence (15 %
peróxido de carbamida; OPA) e Opalescence Xtra Boost (38% peróxido de hidrogênio; OPAXB), por 1h ou 6h diariamente por 14
dias. Medidas de rugosidade superficial (Ra) e microdureza (Knoop, ou KNP) foram regristradas antes e depois do tratamento, e os
dados foram submetidos à análise estatística por teste t de Student pareado (p <0,05). Resultados: Os tratamentos com Opalescence
e Opalescence Xtra Boost não alteraram a rugosidade superficial (p = 0,6199861) ou a microdureza (p = 0,14286744) da porcelana
feldspática testada neste estudo. Conclusão: Os tratamentos clareadores com Opalescence e Opalescence Xtra Boost podem ser
adequados para o tratamento de pacientes submetidos ao tratamento com prótese cerâmica. Objective: To evaluate whether two different bleaching gels affect the microhardness and surface roughness of feldspathic ceramic
specimens, in vitro. Methods: A total of 48 feldspathic porcelain IPS In Line (Ivoclar-Vivadent) discs (16/treatment group) were immersed
in distilled water (Group I, Untreated control, UN), or treated with the bleaching gels: Opalescence (15% carbamide peroxide; OPA) and
Opalescence Xtra Boost (38%hydrogen peroxide; OPAXB), for 1h or 6h daily for 14 days. Surface roughness (Ra) and microhardness
(Knoop, or KNP) measurements were made before and after treatment, and data were subjected to statistical analysis by paired
Student’s t-test (p < 0.05). Results: Treatments using Opalescence and Opalescence Xtra Boost did not altered surface roughness
(p=0.6199861) or microhardness (p=0.14286744) of the feldspathic porcelain tested in this study. Conclusion: Bleaching treatments
using Opalescence and Opalescence Xtra Boost may be suitable for treatment in patients having ceramic prosthodontic treatment.
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