The effect of baking soda when applied to bleached enamel prior to restorative treatment.
This in vitro study evaluated the effect of 10% baking soda solution and sodium bicarbonate powder (applied with jets) when applied to bleached enamel prior to restorative treatment. The surfaces of 40 bovine incisors were flattened and divided into 5 groups (n = 8): Group B (bleached and restored, negative control), Group W (bleached, stored in distilled water for 7 days, and restored), Group BSJ (bleached, abraded with baking soda jet for 1 min, and restored), Group BSS (bleached, application of 10% baking soda solution for 5 min, and restored), and Group R (restored, without bleaching, positive control). The samples were bleached in 1 session with 3 applications of 35% HP-based gel and activated with a LED appliance for 9 min each. Resin composite cylinders (2 mm height and 0.8 mm diameter) were made on the enamel surface after the acid etching and a conventional 1-step single vial adhesive application was performed. After storage in distilled water (37 ± 1°C, 24 hr), the microshear bond test was performed (1 mm/min). ANOVA and Tukey tests were applied to compare the results. The mean results of these tests showed that Groups W, BBS, and R were not statistically different. These groups also indicated a higher bond strength when compared with Groups B and BSJ. The application of 10% baking soda solution for 5 min may be an alternative pre-restorative treatment for bleached enamel, but further studies are needed to consider whether or not this treatment may be effectively used in clinical practice.
Bauru Dental School-USP, Brazil.
Bhenya Ottoni
BO
Tostes
Rafael Francisco Lia
RF
Mondelli
Ynara Bosco de Oliveira
YB
Lima-Arsati
Jose Augusto
JA
Rodrigues
Leonardo Cesar
LC
Costa
D000134:Acid Etching, Dental / Q000379:methods; D000818:Animals; D002021:Buffers; D002417:Cattle; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003743:Dental Enamel / Q000187:drug effects*; D003764:Dental Materials / Q000737:chemistry; D003793:Dental Restoration, Permanent / Q000379:methods*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000494:pharmacology; D054023:Lasers, Semiconductor; D008689:Methacrylates / Q000737:chemistry; D033081:Shear Strength; D017693:Sodium Bicarbonate / Q000494:pharmacology*; D013696:Temperature; D013997:Time Factors; D058205:Tooth Bleaching Agents / Q000494:pharmacology*; D014867:Water / Q000737:chemistry
C103506:Bis-GMA, BPDM, HEMA dental-bonding resin; D002021:Buffers; D003188:Composite Resins; D003764:Dental Materials; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D058205:Tooth Bleaching Agents; D014867:Water; D017693:Sodium Bicarbonate; D006861:Hydrogen Peroxide
baking soda; bovine dental enamel; dental bleaching; shear bond strength