Articles
<![CDATA[Comparison of nanocomposite colour particle stability after immersion in black tea and green tea ]]>
<![CDATA[Pramudiyanti, Nindya]]>;
<![CDATA[Febrida, Renny]]>;
<![CDATA[Usri, Kosterman]]>
<![CDATA[ Padjadjaran Journal of Dentistry Vol 27, No 1 (2015): March 2015 ]]>
Publisher : <![CDATA[Universitas Padjadjaran ]]>
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DOI: 10.24198/pjd.vol27no1.26687
<![CDATA[Introduction: Restorations using composite resins have to meet several requirements, one of which is stable against discoloration. Unfortunately discoloration may happen to this kind of restoration, and one of the causes is the tea habit. This research was to compare the color stability of nano particle composite after soaked in black tea and green tea. Methods: The research method was a laboratory experiment using nano particle composite as samples. It was conducted to 15 samples in cylindrical shape with diameter of 7 mm and thickness of 2 mm. Samples were divided in to 3 groups, each group consists of 5 samples. The first group soaked in black tea, the second group soaked in green tea and the last one soaked in mineral water for 7 days. Color measurements were obtained by using spectrophotometer (CIE lab system) and color differences (∆E) were estimated. For statistical evaluation, analysis of variance (ANOVA) was used with 5% error level. Results: There are differences in color stability of nano composite after soaked in black tea and green tea. The value of color differences after soaked in black tea is 2,669 and green tea is 3,062. Conclusion: The stability of nano particle composite color is better at soaking with black tea compared with immersion with green tea.]]>
<![CDATA[Influence of alcohol-containing mouthwash and alcohol-free mouthwash towards the hybrid composite restoration materials surface hardness ]]>
<![CDATA[Munawar, Adlina Hasna]]>;
<![CDATA[Febrida, Renny]]>;
<![CDATA[Nurdin, Denny]]>
<![CDATA[ Padjadjaran Journal of Dentistry Vol 25, No 3 (2013): November 2013 ]]>
Publisher : <![CDATA[Universitas Padjadjaran ]]>
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DOI: 10.24198/pjd.vol25no3.15574
<![CDATA[Mouthwash is widely used by the community to maintain oral health. Beside the benefit provided, both alcohol-containing mouthwash and alcohol-free mouthwash have negative effects on the composite resin restorative materials, which can affect the surface hardness. One of composite types is hybrid type which is superior in physical and mechanical properties as a restorative material. The aim of this study was to determined the effect of alcohol-containing mouthwash and alcohol-free mouthwash towards the surface hardness of hybrid composite restorative material. This study used 15 disc-shaped specimens of hybrid composite with the size of 6 mm diameter and 4 mm thickness and divided into three treatment groups immersion, in the alcohol-containing mouthwash (A), alcohol-free mouthwash (B), and artificial saliva (C) as control for 12 hours, which surface hardness was further tested using Vickers hardness test. The mean of hardness values of group: A 24.9 VHN; B: 27.2 VHN; and C: 28.4 VHN. The results of statistical tests One-Way ANOVA showed there were significant differences in the hardness values among the three treatment groups (p<0,05). From this study concluded that both alcohol-containing mouthwash and alcohol-free mouthwash were decreasing the surface hardness of hybrid composite restorative material.]]>
<![CDATA[Setting time evaluation of injectable carbonate apatite cement using various sodium carboxymethylcellulose (Na CMC) concentration ]]>
<![CDATA[Cahyanto, Arief]]>;
<![CDATA[Permatasari, Indah]]>;
<![CDATA[Febrida, Renny]]>
<![CDATA[ Padjadjaran Journal of Dentistry Vol 30, No 2 (2018): July 2018 ]]>
Publisher : <![CDATA[Universitas Padjadjaran ]]>
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DOI: 10.24198/pjd.vol30no2.18321
<![CDATA[Introduction: The injectable calcium phosphate cement has the advantage to be used in the bone defect with the limited access which supports a minimally invasive surgical technique. These Injectability properties of calcium phosphate cement can be modified by adding a sodium carboxymethylcellulose (Na CMC). The aim of this present study is to investigate the setting time of injectable bone cement based on CO3Ap using various Na CMC concentration. Methods: Vaterite (a polymorph of CaCO3) and Dicalcium Phosphate Anhydrous (DCPA) as powder phase mixed with 0.2 mol/L Na2HPO4 solution containing 1% polyethylene glycol (PEG) and various concentration of Na CMC as followed 0.5%, 1%, 1.5%, and 2%, respectively. Each concentration groups was consisting of 5 samples from total 20 samples. Powder and liquid phase was mixed with a spatula at a liquid to powder (L/P) ratio of 0.4. The setting time of CO3Ap cement was evaluated according to the modification method standardized by ISO 1566 for dental zinc phosphate cement using a custom fabricated Vicat needle apparatus. The cement was maintained at 37ºC and 100% relative humidity as a standard requirement. Results: The mean value of setting time cement was as followed 0.5% Na CMC 35:06 minutes, 1% Na CMC 38:48 minutes, 1.5% Na CMC 40:06 minutes, and 2% Na CMC 41:30 minutes. The result is statistically significant (p<0.05) with the group of 0.5% Na CMC compared to others group. Conclusion: Increasing the concentration of Na CMC could prolong the setting time of CO3Ap cement.]]>
<![CDATA[Comparison of brittleness and flowability between Cipetir Gutta-Percha and commercial Gutta-Percha ]]>
<![CDATA[Usri, Kosterman]]>;
<![CDATA[Faza, Yanwar]]>;
<![CDATA[Sanjaya, Arya]]>;
<![CDATA[Viona, Nona]]>;
<![CDATA[Djustiana, Nina]]>;
<![CDATA[Karlina, Elin]]>;
<![CDATA[Febrida, Renny]]>;
<![CDATA[Cahyanto, Arief]]>
<![CDATA[ Padjadjaran Journal of Dentistry Vol 34, No 1 (2022): March ]]>
Publisher : <![CDATA[Universitas Padjadjaran ]]>
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DOI: 10.24198/pjd.vol34no1.38869
<![CDATA[Introduction: Gutta-Percha (GP) is a standard endodontic filling material found in pure form in the Cipetir area, Indonesia. However, a study comparing physical properties (brittleness and flowability) between pure GP and commercially used GP has not been found. Therefore, this study aims to test the brittleness and flowability of Cipetir GP compared to commercial GP. Methods: This study was quasi-experimental. Forty samples were prepared for each material and test, according to ANSI/ADA specification-GP cones-no 78 in 2006. The first step began by making a sample of Cipetir GP using moulds from a cuvette, commercial GP (Inline #80), and gypsum stone. The second step was to test the brittleness (Crease Recovery Tester) and flowability (according to ADA No. 78 of 2000) of Cipetir GP and commercial GP. Results: The brittleness test of Cipetir GP showed unbroken samples, and the commercial GP showed four broken samples. The Fisher's Exact test showed a p-value of 0.087, which means there was no significant difference in brittleness between Cipetir GP and commercial GP. At the same time, the average value of flowability of Cipetir GP and commercial GP were 6.46 mm and 0.19 mm, respectively. The unpaired t-test showed a p-value<0.05, which means there was a significant difference in the flowability between Cipetir GP and commercial GP. Conclusions: There is a brittleness similarity between Cipetir GP and commercial GP, while the flowability value of Cipetir GP is higher than commercial GP. Those initial findings showed that the Cipetir GP might become an excellent candidate to be an alternative endodontic filling.]]>
<![CDATA[PENDEKATAN BIOMIMETIK PADA BIDANG KEDOKTERAN GIGI: TINJAUAN PUSTAKA ]]>
<![CDATA[Gempita, Gema]]>;
<![CDATA[Febrida, Renny]]>
<![CDATA[ PREPOTIF : JURNAL KESEHATAN MASYARAKAT Vol. 9 No. 2 (2025): AGUSTUS 2025 ]]>
Publisher : <![CDATA[Universitas Pahlawan ]]>
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DOI: 10.31004/prepotif.v9i2.47522
<![CDATA[Tinjauan pustaka ini membahas pendekatan biomimetik dalam bidang kedokteran gigi yang bertujuan untuk meniru dan menggantikan struktur alami pada area kraniofasial. Penelitian yang intensif selama beberapa dekade telah menghasilkan pengembangan biomaterial dan teknik inovatif untuk mendukung proses tersebut. Temuan menunjukkan bahwa material berbasis alami atau yang menyerupai struktur biologis memiliki hasil klinis yang lebih baik dan potensi lebih tinggi untuk aplikasi klinis. Oleh karena itu, pengembangan biomaterial biomimetik memerlukan pendekatan interdisipliner yang melibatkan kedokteran, bioteknologi, dan ilmu komputasi. Di masa depan, pengembangan jaringan gigi yang sepenuhnya diregenerasi, seperti enamel, dentin, pulpa, dan sementum, dengan karakteristik nanostruktur yang menyerupai jaringan gigi alami, menjadi salah satu harapan utama dalam kemajuan bidang ini.]]>
<![CDATA[The comparison of surface hardness between thermoplastic nylon resin and heat-cured acrylic resin ]]>
<![CDATA[Utami, Marina]]>;
<![CDATA[Febrida, Renny]]>;
<![CDATA[Djustiana, Nina]]>
<![CDATA[ Padjadjaran Journal of Dentistry Vol 21, No 3 (2009): November 2009 ]]>
Publisher : <![CDATA[Universitas Padjadjaran ]]>
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DOI: 10.24198/pjd.vol21no3.14117
<![CDATA[The surface hardness level of a denture base material is related to the resistance to abrasion, scratch, polishing and water sorption. Nowadays, thermoplastic nylon resins and heat-cured acrylic resins are used as denture base materials. Denture base must be immersed in water to maintain its humidity. The objective of this research was to compare the surface hardness level between thermoplastic nylon resins and heat-cured acrylic resins. Materials used for the research were thermoplastic nylon resins from Valplast and heat-cured acrylic resins QC-20, with a sample size of 64x(10±0.03)x(2.5±0.03) mm. Surface hardness is measured with Vickers Microhardness Tester and the data were analyzed by ANOVA method. The results showed that comparison ratio of surface hardness level between thermoplastic nylon resins and heat-cured acrylic resins before immersion is 3.2:7.3 VHN respectively, while the comparison value of both resins after immersion is 2.8:6.6 VHN. In conclusion, the surface hardness level of thermoplastic nylon resins is lower compared to heat-cured acrylic resins. This result is due to thermoplastic nylon resin’s higher porosity, its different polymer chains, and the plasticizers effect after immersion in water.]]>
<![CDATA[The comparison of color stability between thermoplastic nylon resin and heat-cured acrylic resin after tea-soaking using spectrophotometer ]]>
<![CDATA[Lestari, Lisa Putri]]>;
<![CDATA[Usri, Kosterman]]>;
<![CDATA[Febrida, Renny]]>
<![CDATA[ Padjadjaran Journal of Dentistry Vol 21, No 3 (2009): November 2009 ]]>
Publisher : <![CDATA[Universitas Padjadjaran ]]>
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DOI: 10.24198/pjd.vol21no3.14107
<![CDATA[Color stability is one of the denture base material requirement. Nowadays, nylon thermoplastic resin and heat-cured acrylic resin which is used as denture base materials can be changed in colour. One of a colour-changed factor is the tea drinking habit. The objective of this research was to compare the colour stability between nylon thermoplastic resin and heat-cured acrylic resin after soaked in tea. Materials used for the research were nylon thermoplastic resin from Valplast and heat-cured acrylic resin QC-20, with a sample size of 64x(10±0.03)x(2.5±0.03)mm. The sample would be assessed of colour stability after the denture base soaked in tea for 7 days. The colour measurement of each sample was done by spectrophotometer equipment (CIE lab system). Data gathered later on statistically processed with ANOVA testing. The result showed that the comparison ratio of colour stability between nylon thermoplastic resin and heat-cured acrylic resin after soaked in tea was 1.9886:1.1152. The conclusion was that colour stability in the nylon thermoplastic resin was lower than heat-cured acrylic resin after soaked in tea. This result was due to a polymer chain of nylon thermoplastic which was lower than heat-cured acrylic resin and its porosity which was higher, so tea easily soaked into the materials.]]>
<![CDATA[The effect of light source distance on diametral tensile strength of nano particle composite ]]>
<![CDATA[Febrida, Renny]]>;
<![CDATA[Herda, Ellyza]]>;
<![CDATA[Soufyan, Andi]]>
<![CDATA[ Padjadjaran Journal of Dentistry Vol 20, No 3 (2008): November 2008 ]]>
Publisher : <![CDATA[Universitas Padjadjaran ]]>
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DOI: 10.24198/pjd.vol20no3.14120
<![CDATA[The use of nano particle composite in posterior region is somehow difficult due to the limited space to place the light source as close as possible to the restorative material. The distance between the light source and restorative material surface leads to decreased light intensity that causing inadequate polymerization. The inadequate polymerization affects the composite diametral tensile strength. Two types of nano particle composite, i.e. FiltekTM Z-350 and Ceram-XTM were tested for their diametral tensile strength, which is affected by the distance of the light source from the composite material surface. Some cylindrical specimens were exposed to light with various distances from the light source, i.e. 0, 1, 2, 3, 4, and 5 mm from the specimen surface. From the six distance variations tested the diametral tensile strength of Filtek Z-350 is 64.09-58.20 MPa with the significant result in 2, 3, 4 and 5 mm distances; and the diametral strenght of Ceram-X is 47.52-42.20 MPa with the significant result in 2, 3, 4 and 5 mm distances. The results of this study show that the increased distance of the light source from the nano particle composite restorative material leads to decreased diametral strength of the two nano particle composites tested.]]>
<![CDATA[INFLUENCE OF HCL 0.02 M ON PHASE AND SIZE OF CaCO3 VIA FINE BUBBLE DIFFUSER METHOD AS DENTAL BIOMATERIAL ]]>
<![CDATA[Febrida, Renny]]>;
<![CDATA[Setyanagari, Sekar Diva]]>;
<![CDATA[Faza, Yanwar]]>
<![CDATA[ B-Dent: Jurnal Kedokteran Gigi Universitas Baiturrahmah Vol 10, No 2 (2023): Vol 10 No 2, Desember 2023 ]]>
Publisher : <![CDATA[Universitas Baiturrahmah ]]>
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DOI: 10.33854/jbd.v10i2.1512
<![CDATA[Background. Particles of calcium carbonate (CaCO3) have been applied in a number of fields, including as dental biomaterial. Because CaCO3 particles have three distinct polymorphs and complex crystallization behavior, it is difficult to systematically adjust their physical properties for desired applications. Objective. This investigation aims to examine the influence of the addition of the 0.02 M HCl additive on the phase and size of the CaCO3 particles synthesized with the fine bubble diffuser method. Methods. The type of research is descriptive explorative. There were two sample groups in this study, and each group had three replications (n = 3). Group 1 added 0.02 M of HCl as an addition to the as-prepared material, while Group 2 added no HCl at all. The phase of CaCO3 was evaluated by using the FTIR (Thermo Scientific Nicolet iS5), while the particle size was measured via DLS (Horiba Scientifica SZ-100 Nanopartica) Result. The results showed the sample of CaCO3 without any additive posesses Amorphous Calcium Carbonate (ACC) and calcite. Meanwhile, sample of CaCO3 with addition of HCL 0.02 M showed ACC, calcites and vaterite phase. Particle size of CaCO3 without additve is larger than another one. Conclusion. In this study, the addition of the additive HCl 0.02 resulted in a decrease in the pH of the solution resulting in a phase change from clacite to vaterite as well as decreasing the particle size of CaCO3.]]>
<![CDATA[SURFACE MODIFICATION OF ALUMINA-SILICA BY ADDITIVE AGENT USING SOL-GEL METHOD AS FILLER DENTAL COMPOSITE ]]>
<![CDATA[Faza, Yanwar]]>;
<![CDATA[Takarini, Veni]]>;
<![CDATA[Febrida, Renny]]>;
<![CDATA[Karlina, Elin]]>
<![CDATA[ B-Dent: Jurnal Kedokteran Gigi Universitas Baiturrahmah Vol 10, No 2 (2023): Vol 10 No 2, Desember 2023 ]]>
Publisher : <![CDATA[Universitas Baiturrahmah ]]>
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DOI: 10.33854/jbd.v10i2.1506
<![CDATA[Background: Macro-sized and inhomogeneous distribution of ceramic filer particles make it difficult to obtain smooth surfaces of dental composite after polishing. Objective. This study aims to synthesize alumina silica (Al2O3-SiO2) fillers using sol gel method with the additives agent chitosan 5%, 10% and polyethylene glycol (PEG) 5% to produce micro particle size and evenly distributed particle as filler dental composite. Methods. The type of research is descriptive explorative. The sol-gel process was utilized to synthesize filler particles of Al2O3-SiO2. TEOS was dissolved in ethanol and mixed with acetic acid as catalyts. Al2(NO3)3 was added into the solution and mixed homogenously. Subsequently, the additive agents (Chitosan 5%, chitosan 10% and PEG) were mixed into the mixture for 30 minutes. Drying the samples for 48 hours at 60°C in the oven. The Dynamic light scattering (DLS) SZ-1 was used to evaluate the size, particle distribution and zeta potential. Result. The results showed that the addition of chitosan 10% produced a smaller size of Al2O3-SiO2 compared to other samples. A homogeneous particle distribution is shown in the sample with PEG 5%. Meanwhile, zeta potential values of the filler particles Al2O3-SiO2 with the addition of chitosan 10% shows the biggest value. Conclusion: The additive agent of chitosan 10% can modify the surface of filler Al2O3-SiO2 in order to inhibit particle growth more effectively but better particle distribution is shown in samples with PEG 5% due to the lower viscosity than chitosan thus it is easily homogenized in the solution]]>
