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All Journal Dental Journal (Majalah Kedokteran Gigi)
Irfan Dwiandhono
Faculty of Medicine, Universitas Jenderal Soedirman, Purwokerto
Dentistry

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The thickness of odontoblast-like cell layer after induced by propolis extract and calcium hydroxide Irfan Dwiandhono; Ruslan Effendy; Sri Kunarti
Dental Journal (Majalah Kedokteran Gigi) Vol. 49 No. 1 (2016): March 2016
Publisher : Faculty of Dental Medicine, Universitas Airlangga https://fkg.unair.ac.id/en

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (404.702 KB) | DOI: 10.20473/j.djmkg.v49.i1.p17-21

Abstract

Background: Propolis is a substance made from resin collected by bees (Apis mellifera) from variety of plants, mixed with its saliva and various enzymes to build a nest. Propolis has potential antimicrobial and antiinflammatory agents with some advantages over calcium hydroxide (Ca(OH)2). Ca(OH)2 has been considered as the “gold standard” of direct pulp-capping materials, but there are still some weakness of its application. First, it can induce pulp inflammation which last up to 3 months. Second, the tissue response to Ca(OH)2 is not always predictable. Third, the tunnel defect can probably formed in dentinal bridge with possible bacterial invasion in that gap. Purpose: This study was aimed to determine and compare the thickness of odontoblast-like cells layer after induced by propolis extract and Ca(OH)2 in rat’s pulp tissue. Method: Class 1 preparation was done in maxillary first molar tooth of wistar mice until the pulp opened. The Ca(OH)2 and propolis extract was applied to induce the formation of odontoblast-like cells, the cavity was filled with RMGIC. The teeth were extracted (after 14 and 28 days of induction). The samples were then processed for histological evaluation. Result: There were significant differences between the thickness of odontoblast-like cells after induced by propolis extract and Ca(OH)2. Conclusion: The propolis extract as the direct pulp capping agent produces thicker odontoblast-like cell layer compared to Ca(OH)2.
The difference in microleakage levels of nanohybrid composite resin using eighth-generation ethanol and isopropanol solvent bonding materials under moist and dry conditions (in vitro study) Irfan Dwiandhono; Setiadi W. Logamarta; Taura Dhanurdara
Dental Journal (Majalah Kedokteran Gigi) Vol. 52 No. 1 (2019): March 2019
Publisher : Faculty of Dental Medicine, Universitas Airlangga https://fkg.unair.ac.id/en

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (176.164 KB) | DOI: 10.20473/j.djmkg.v52.i1.p41-44

Abstract

Background: Microleakage during restoration causes secondary caries. The shrinkage of nanohybrid composite resin can occur during the polymerization process, affected by both the selection of bonding materials featuring different solvents, such as ethanol and isopropanol, as well as contrasting conditions such as moist and dry. Purpose: This study aimed to determine and analyze the differences of microleakage level of nanohybrid composite resin using the eighth-generation bonding materials made from ethanol and isopropanol solvents under moist and dry conditions. Methods: This research constituted an experimental laboratory study. The samples were divided into four groups. Group I used a bonding material produced from ethanol under dry conditions. Group II used a bonding material produced from ethanol under moist conditions. Group III used a bonding material produced from isopropanol under dry conditions. Group IV used a bonding material produced from isopropanol under moist conditions. The levels of microleakage were subsequently tested using a stereo microscope. Results: Microleakage examination was performed by means of a stereo microscope to observe the methylene blue color penetration with assessment subsequently being performed on a scale of 0 to 3. The statistical results of a Kruskal-Wallis test showed that no significant differences occurred in any of the treatment groups (sig = 0.141, p<0.05). Conclusion: There was no difference in the microleakage levels of nanohybrid composite resin using eighth-generation bonding materials produced from ethanol and isopropanol solvents under moist and dry conditions.
The different effects of preheating and heat treatment on the surface microhardness of nanohybrid resin composite Brelian Elok Septyarini; Irfan Dwiandhono; Dian N. Agus Imam
Dental Journal (Majalah Kedokteran Gigi) Vol. 53 No. 1 (2020): March 2020
Publisher : Faculty of Dental Medicine, Universitas Airlangga https://fkg.unair.ac.id/en

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/j.djmkg.v53.i1.p6-9

Abstract

Background: A composite resin is used as restorative material in dentistry because it has the same colour as dental enamel, is easy to use in an oral cavity and offers good biocompatibility. Based on the size of filler, composite resin is divided into types, one of which is a composite resin nanohybrid. An important mechanical property of restorative material is microhardness. The mechanical properties of restorative material is highly affected by both polymerisation and heating process. There are many methods to improve composite resin’s microhardness, including preheating and heat treatment. Purpose: The purpose of this study was to evaluate different effects of preheating and heat treatment on the microhardness of nanohybrid composite resin. Methods: This study is an experimental laboratory research with post-test-only group design. Samples were divided into six groups: preheating groups at temperatures of 37oC and 60oC, heat treatment groups at temperatures of 120oC and 170oC, a negative control group and a positive control group. Afterwards, the resulting data were analysed using one-way ANOVA. Results: The result based on the one-way ANOVA test indicated that there was a difference in microhardness in each group with a significance of 0.000 (p<0.005) between preheating and heat treatment. Conclusion: The conclusion of this study was the best microhardness of composite resin nanohybrid is the heat treatment group at temperature 170oC.
Pomegranate (Punica granatum L.) gel extract as an antioxidant on the shear bond strength of a resin composite post-bleaching application with 40% hydrogen peroxide Indes Rosmalisa Suratno; Irfan Dwiandhono; Ryana Budi Purnama
Dental Journal (Majalah Kedokteran Gigi) Vol. 54 No. 2 (2021): June 2021
Publisher : Faculty of Dental Medicine, Universitas Airlangga https://fkg.unair.ac.id/en

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/j.djmkg.v54.i2.p87-91

Abstract

Background: Tooth discoloration can be treated with tooth bleaching. Bleaching using 40% hydrogen peroxide can reduce the shear bond strength of resin composite because there are free radicals on the tooth surface, so it can delay the restoration. The application of antioxidants can eliminate free radicals after the bleaching procedure and increase the shear bond strength of the composite resin. The common antioxidants are ascorbic acid and natural ingredients, such as pomegranate (Punica granatum L.). Purpose: To determine the effect of pomegranate extract gel on the shear bond strength of composite resin after 40% hydrogen peroxide bleaching application. Methods: This research used 32 maxillary first premolars that were divided into four groups. The samples were bleached, then the labial was prepared and antioxidant gel was applied: group P1 pomegranate gel extract of 5%, group P2 pomegranate gel extract of 10%, group K1 positive control ascorbic acid gel of 10% and group K2 as the negative control. The samples were restored with a nanohybrid composite resin. The shear bond strength was tested using a universal testing machine. The data were tested using a one-way ANOVA followed by a post-hoc LSD test. Results: The pomegranate gel extract increased the shear bond strength of the composite resin after the bleaching procedure of 40% hydrogen peroxide compared with the ascorbic acid gel group and the negative control group. The one-way ANOVA test showed a significant difference (p<0.05). The post-hoc LSD test showed significant differences between the treatment and negative control groups (p<0.05). Conclusion: The pomegranate gel extract as an antioxidant increased the shear bond strength of the composite resin restoration after the 40% hydrogen peroxide bleaching application.
Co-Authors Brelian Elok Septyarini Dian N. Agus Imam Indes Rosmalisa Suratno Ruslan Effendy Ryana Budi Purnama Setiadi W. Logamarta Sri Kunarti Taura Dhanurdara