Monitoring of demineralized dentin microhardness throughout and after bleaching
Patricia Moreira De Freitas, Cecilia Pedroso Turssi, Anderson Hara, Mônica Campos Serra
Purpose: To evaluate the effect of six bleaching agents: Nite White [NW] 10% and 22% Excel 2Z (Discus Dental), Rembrandt (REM) 10% and 22% (DenMat), Opalescence (OPA) 10% and 20% (Ultradent) and a placebo agent on demineralized dentin microhardness at different time intervals. Methods: 105 human dentin slabs (3×3 mm) were embedded, planed and submitted to cariogenic challenges, composed of de- and remineralization cycles. For 42 days, specimens were exposed to bleaching agents, consisting of applying them daily for 8 hours, removing and storing the specimens in artificial saliva for 16 hours. At the end of the bleaching treatment, specimens were kept in artificial saliva for 14 days. Knoop Microhardness tests were performed on specimens' surface before (baseline), during (8 hours, 7, 14, 21, 28, 35 and 42 days) and after bleaching procedures (7 and 14 days). Results: The ANOVA for split-plot showed significant effect on the interaction between bleaching agent and time (α=0.05). Tukey's test revealed no significant differences on demineralized dentin microhardness exposed to bleaching agents until Day 7. Regression analyses demonstrated that NW 10% and 22% and OPA 10% and 20% increased dentin microhardness in different magnitudes, whereas REM 10% and 22% induced mineral loss during bleaching agent application, followed by microhardness recovery in the post-treatment period.
American Journal of Dentistry
Dentin
Artificial Saliva
Analysis of Variance
Dentistry(all)
De Freitas, P. M., Turssi, C. P., Hara, A., & Serra, M. C. (2004). Monitoring of demineralized dentin microhardness throughout and after bleaching. American Journal of Dentistry, 17(5), 342-346.
Monitoring of demineralized dentin microhardness throughout and after bleaching. / De Freitas, Patricia Moreira; Turssi, Cecilia Pedroso; Hara, Anderson; Serra, Mônica Campos.
In: American Journal of Dentistry, Vol. 17, No. 5, 10.2004, p. 342-346.
De Freitas, PM, Turssi, CP, Hara, A & Serra, MC 2004, 'Monitoring of demineralized dentin microhardness throughout and after bleaching', American Journal of Dentistry, vol. 17, no. 5, pp. 342-346.
De Freitas PM, Turssi CP, Hara A, Serra MC. Monitoring of demineralized dentin microhardness throughout and after bleaching. American Journal of Dentistry. 2004 Oct;17(5):342-346.
De Freitas, Patricia Moreira ; Turssi, Cecilia Pedroso ; Hara, Anderson ; Serra, Mônica Campos. / Monitoring of demineralized dentin microhardness throughout and after bleaching. In: American Journal of Dentistry. 2004 ; Vol. 17, No. 5. pp. 342-346.
@article{60acb25888884735852a2eba51b044e1,
title = "Monitoring of demineralized dentin microhardness throughout and after bleaching",
abstract = "Purpose: To evaluate the effect of six bleaching agents: Nite White [NW] 10{\%} and 22{\%} Excel 2Z (Discus Dental), Rembrandt (REM) 10{\%} and 22{\%} (DenMat), Opalescence (OPA) 10{\%} and 20{\%} (Ultradent) and a placebo agent on demineralized dentin microhardness at different time intervals. Methods: 105 human dentin slabs (3×3 mm) were embedded, planed and submitted to cariogenic challenges, composed of de- and remineralization cycles. For 42 days, specimens were exposed to bleaching agents, consisting of applying them daily for 8 hours, removing and storing the specimens in artificial saliva for 16 hours. At the end of the bleaching treatment, specimens were kept in artificial saliva for 14 days. Knoop Microhardness tests were performed on specimens' surface before (baseline), during (8 hours, 7, 14, 21, 28, 35 and 42 days) and after bleaching procedures (7 and 14 days). Results: The ANOVA for split-plot showed significant effect on the interaction between bleaching agent and time (α=0.05). Tukey's test revealed no significant differences on demineralized dentin microhardness exposed to bleaching agents until Day 7. Regression analyses demonstrated that NW 10{\%} and 22{\%} and OPA 10{\%} and 20{\%} increased dentin microhardness in different magnitudes, whereas REM 10{\%} and 22{\%} induced mineral loss during bleaching agent application, followed by microhardness recovery in the post-treatment period.",
author = "{De Freitas}, {Patricia Moreira} and Turssi, {Cecilia Pedroso} and Anderson Hara and Serra, {M{\^o}nica Campos}",
journal = "American Journal of Dentistry",
publisher = "Mosher and Linder, Inc",
T1 - Monitoring of demineralized dentin microhardness throughout and after bleaching
AU - De Freitas, Patricia Moreira
AU - Turssi, Cecilia Pedroso
AU - Hara, Anderson
AU - Serra, Mônica Campos
N2 - Purpose: To evaluate the effect of six bleaching agents: Nite White [NW] 10% and 22% Excel 2Z (Discus Dental), Rembrandt (REM) 10% and 22% (DenMat), Opalescence (OPA) 10% and 20% (Ultradent) and a placebo agent on demineralized dentin microhardness at different time intervals. Methods: 105 human dentin slabs (3×3 mm) were embedded, planed and submitted to cariogenic challenges, composed of de- and remineralization cycles. For 42 days, specimens were exposed to bleaching agents, consisting of applying them daily for 8 hours, removing and storing the specimens in artificial saliva for 16 hours. At the end of the bleaching treatment, specimens were kept in artificial saliva for 14 days. Knoop Microhardness tests were performed on specimens' surface before (baseline), during (8 hours, 7, 14, 21, 28, 35 and 42 days) and after bleaching procedures (7 and 14 days). Results: The ANOVA for split-plot showed significant effect on the interaction between bleaching agent and time (α=0.05). Tukey's test revealed no significant differences on demineralized dentin microhardness exposed to bleaching agents until Day 7. Regression analyses demonstrated that NW 10% and 22% and OPA 10% and 20% increased dentin microhardness in different magnitudes, whereas REM 10% and 22% induced mineral loss during bleaching agent application, followed by microhardness recovery in the post-treatment period.
AB - Purpose: To evaluate the effect of six bleaching agents: Nite White [NW] 10% and 22% Excel 2Z (Discus Dental), Rembrandt (REM) 10% and 22% (DenMat), Opalescence (OPA) 10% and 20% (Ultradent) and a placebo agent on demineralized dentin microhardness at different time intervals. Methods: 105 human dentin slabs (3×3 mm) were embedded, planed and submitted to cariogenic challenges, composed of de- and remineralization cycles. For 42 days, specimens were exposed to bleaching agents, consisting of applying them daily for 8 hours, removing and storing the specimens in artificial saliva for 16 hours. At the end of the bleaching treatment, specimens were kept in artificial saliva for 14 days. Knoop Microhardness tests were performed on specimens' surface before (baseline), during (8 hours, 7, 14, 21, 28, 35 and 42 days) and after bleaching procedures (7 and 14 days). Results: The ANOVA for split-plot showed significant effect on the interaction between bleaching agent and time (α=0.05). Tukey's test revealed no significant differences on demineralized dentin microhardness exposed to bleaching agents until Day 7. Regression analyses demonstrated that NW 10% and 22% and OPA 10% and 20% increased dentin microhardness in different magnitudes, whereas REM 10% and 22% induced mineral loss during bleaching agent application, followed by microhardness recovery in the post-treatment period.
JO - American Journal of Dentistry
JF - American Journal of Dentistry