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Effect of 35% sodium ascorbate combined with 0.4% surfactant on resin tag length in composite restorations following intracoronal bleaching Arlini, Rakhmalita; Nugraheni, Tunjung; Mulyawati, Ema
Majalah Kedokteran Gigi Indonesia Vol 11, No 1 (2025): April
Publisher : Faculty of Dentistry, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/majkedgiind.94170

The application of 35% hydrogen peroxide in intracoronal bleaching generates free radicals that shorten resin tags and weaken the bond strength of composite resin restorations. Although 35% sodium ascorbate can neutralize free radical residues, its molecular instability limits its effectiveness. The addition of surfactants may enhance both the penetration ability and stability of sodium ascorbate. This study aimed to investigate the effect of adding 0.4% surfactant to 35% sodium ascorbate on the length of resin tags in composite resin restorations following intracoronal bleaching. Thirty mandibular premolars were prepared with standardized Class I cavities measuring 2.7 mm in diameter and 6 mm in depth. A 35% hydrogen peroxide gel was applied to the cavities for five consecutive days. After bleaching, the samples were randomly assigned to three groups of ten teeth each. The first group was stored in an incubator for seven days before undergoing composite resin restoration. The second group received an application of 35% sodium ascorbate, which was then rinsed off before immediate composite restoration. The third group received an application of 35% sodium ascorbate combined with 0.4% surfactant, followed by rinsing and immediate composite restoration. Histological preparations were made using hematoxylin-eosin staining and observed under a light microscope at 400× magnification. Resin tag lengths were measured using the Image Raster application. The one-way ANOVA test revealed a statistically significant difference among the groups (p = 0.000). Post-hoc LSD analysis showed that resin tag lengths in the third group were significantly greater than those in both the first and second groups (p = 0.000 for both comparisons). These results indicate that the combination of 35% sodium ascorbate with 0.4% surfactant significantly increases resin tag length and may enhance the bonding performance of composite restorations following intracoronal bleaching.

Comparison of Fracture Resistance between Prefabricated and Fabricated Fiber Reinforced Post Systems on Different Post Canal Width Widyastuti, Noor hafida; Hadriyanto, Wignyo; Mulyawati, Ema
Proceeding ISETH (International Summit on Science, Technology, and Humanity) 2016: Proceeding ISETH (International Conference on Science, Technology, and Humanity)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/iseth.2362

Background: Endodontic treated teeth are more susceptible to fracture. Correct restoration can minimize fracture risk, for example crown and post-core systems. Based on its manufacturing, Fiber Reinforced Composite (FRC) Post was divided into prefabricated and fabricated. The objective of this study was to evaluate the differences of fracture resistance between Prefabricated and Fabricated FRC Post systems on different post canal width. Method: The samples of this study were 28 premolars that were cut with 15 mm in length. The samples were treated with conventional endodontic method using gutta percha and resin sealer. The samples were divided into two groups and two sub-groups. The first two group was based on canal width consisting of 14 teeth each group with two different canal width (1.4 mm and 2.1 mm). Then, the first group was divided again into two subgroups based on the dowel use (Prefabricated post and Fabricated Post). Universal Testing machine was used to test the samples resistance. Result: This research showed that there were differences in fracture resistance on different post canal width. However, there were no fracture resistance differences between prefabricated post and fabricated post.

THE EFFECT OF VARIOUS DESENSITIZING AGENT APPLICATION ON IN-OFFICE BLEACHING ON THE NUMBER OF FIBROBLASTS Apriliyani, Nunik Rahayu; Mulyawati, Ema; Kristanti, Yulita
Odonto : Dental Journal Vol 8, No 1 (2021): July 2021
Publisher : Faculty of Dentistry, Universitas Islam Sultan Agung

Background: Reactive Oxygen Species (ROS) released from hydrogen peroxide causes inflammation of the pulp. Remineralization action by fluoride-containing desensitizing agent (Casein Phosphopeptides-Amorphous Calcium Fluoride Phosphate/CPP-ACFP) occluding dentinal tubule, thereby minimizing the penetration of hydrogen peroxide into the pulp and affect the number of fibroblasts. The aim of this study was to determine the effect of fluoride-containing desensitizing agent (CPP-ACFP) application: before, after, and before-after in-office bleaching techniques using 40% hydrogen peroxide on the number of fibroblasts.Method: Twenty-eight maxillary molar teeth were divided into 4 groups, Control Group (bleaching treatment), Group I (CPP-ACFP application before bleaching), Group II (CPP-ACFP application after bleaching), and Group III (CPP-ACFP application before and after bleaching). Rats were sacrificed 5 days after and histological preparations were stained with HE. Fibroblasts counting was performed using a 1000x magnification light microscope.Result: ANOVA test showed that there were significant mean differences in the number of fibroblasts among the groups. The LSD test showed that there were statistically significant differences in almost all of the compared groups except between the Control Group and Group II.Conclusion: The number of fibroblasts in the pulp of rats applied CPP-ACFP before and after in-office bleaching was less than applied CPP-ACFP before or after in-office bleaching.

THE EFFECT OF VARIOUS DESENSITIZING AGENT APPLICATION ON IN-OFFICE BLEACHING ON THE NUMBER OF FIBROBLASTS Apriliyani, Nunik Rahayu; Mulyawati, Ema; Kristanti, Yulita
Odonto : Dental Journal Vol 8, No 1 (2021): July 2021
Publisher : Faculty of Dentistry, Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/odj.8.1.132-140

Background: Reactive Oxygen Species (ROS) released from hydrogen peroxide causes inflammation of the pulp. Remineralization action by fluoride-containing desensitizing agent (Casein Phosphopeptides-Amorphous Calcium Fluoride Phosphate/CPP-ACFP) occluding dentinal tubule, thereby minimizing the penetration of hydrogen peroxide into the pulp and affect the number of fibroblasts. The aim of this study was to determine the effect of fluoride-containing desensitizing agent (CPP-ACFP) application: before, after, and before-after in-office bleaching techniques using 40% hydrogen peroxide on the number of fibroblasts.Method: Twenty-eight maxillary molar teeth were divided into 4 groups, Control Group (bleaching treatment), Group I (CPP-ACFP application before bleaching), Group II (CPP-ACFP application after bleaching), and Group III (CPP-ACFP application before and after bleaching). Rats were sacrificed 5 days after and histological preparations were stained with HE. Fibroblasts counting was performed using a 1000x magnification light microscope.Result: ANOVA test showed that there were significant mean differences in the number of fibroblasts among the groups. The LSD test showed that there were statistically significant differences in almost all of the compared groups except between the Control Group and Group II.Conclusion: The number of fibroblasts in the pulp of rats applied CPP-ACFP before and after in-office bleaching was less than applied CPP-ACFP before or after in-office bleaching.

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