Garuda - Garba Rujukan Digital

p-Index From 2020 - 2025

1.704

P-Index

This Author published in this journals

All Journal Jurnal Kedokteran Gigi Universitas Padjadjaran Padjadjaran Journal of Dentistry Journal of Dentomaxillofacial Science B-Dent, Jurnal Kedokteran Gigi Universitas Baiturrahmah Padjadjaran Journal of Dental Researchers and Students PREPOTIF : Jurnal Kesehatan Masyarakat Jurnal Material Kedokteran Gigi

Renny Febrida

Laboratory Of Material Processing, Department Of Engineering Physics, Institute Of Technology Bandung, Bandung 40132, Jawa Barat

Author-ID : 2541317

Biochemistry, Genetics & Molecular Biology Dentistry Health Professions Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Public Health

Published : 30 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3

The effect of light source distance on diametral tensile strength of nano particle composite Febrida, Renny; Herda, Ellyza; Soufyan, Andi
Padjadjaran Journal of Dentistry Vol 20, No 3 (2008): November
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

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.

Comparison of bond strength between self-adhered and conventional composites Putra, Adria Permana; Karlina, Elin; Febrida, Renny
Padjadjaran Journal of Dentistry Vol 22, No 3 (2010): November
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Bond strength towards dentine is a critical factor for composite restoration success. The purpose of this research was to obtain data on self-adhered composite bond strength to tooth dentine. This research was an experimental laboratory research that used 10 third molar teeth as samples. The teeth were prepared by thinning its mesial part until it reaches dentine layer. The sample was divided into two groups, each consisting of 5 teeth. In group I was applied self-adhered composite with FusioÂ® Liquid Dentine brand, whereas group II was applied conventional composite with Ivoclar Te-Econom FlowÂ®. The applied composite had a cylindrical shape with 6 mm diameter. The sample was then placed on the test arm. The shear bond strength test method then conducted on Universal Testing Machine (UTM). Obtained data was tested using Two-tails Independent t-Test (Î± = 0,05). The results showed the average of self-adhered composite bond strength to dentine is 1,8878 Â± 0,2859 MPa and conventional composite for 4,43552 Â± 0,49472 MPa. The data showed that the self-adhered composite bond strength to dentine is smaller than conventional composite. From this research can be concluded that there was bond strength difference between the self-adhered composite with conventional composites towards the tooth dentine.

The comparison of color stability between thermoplastic nylon resin and heat-cured acrylic resin after tea-soaking using spectrophotometer Lestari, Lisa Putri; Usri, Kosterman; Febrida, Renny
Padjadjaran Journal of Dentistry Vol 21, No 3 (2009): November
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

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(10Â±0.03)x(2.5Â±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.

Influence of alcohol-containing mouthwash and alcohol-free mouthwash towards the hybrid composite restoration materials surface hardness Munawar, Adlina Hasna; Febrida, Renny; Nurdin, Denny
Padjadjaran Journal of Dentistry Vol 25, No 3 (2013): November
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

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.

The comparison of surface hardness between thermoplastic nylon resin and heat-cured acrylic resin Utami, Marina; Febrida, Renny; Djustiana, Nina
Padjadjaran Journal of Dentistry Vol 21, No 3 (2009): November
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

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(10Â±0.03)x(2.5Â±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 resinâs higher porosity, its different polymer chains, and the plasticizers effect after immersion in water.

The comparison of surface roughness value of microfilled and nano particle composite restoration that polish using rubber cups Retyoningrum, Gita; Amanda, Rizki Yuli; Dharsono, HD Adhita; Febrida, Renny
Padjadjaran Journal of Dentistry Vol 21, No 3 (2009): November
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Surface roughness composite restoration can decrease aesthetic aspect of composite restoration and facilitated bacterial retention. It can affect periodontal disease and recurrent caries. Polishing is a process to obtain a smooth and glossy surface of restoration. Rubber cups is one of polishing instrument that frequently used to get a smooth, glossy and aesthetic surface of restoration. The specimen was micro filled (3M ESPE Z100TM Restorative, St. Paul) and nano particle (3M ESPE Z350TM Restorative, St. Paul) composite resin blocks sized 5x5x2 mm. Each of composite consists of ten specimens that polished with rubber cups for 30 seconds at 3500 rpm. Surface roughness was measured five times for each specimen by using surface roughness tester. Average Ra value of micro filled was 0.22 Î¼m and Ra value of nano particle was 0.25 Î¼m. Data were analyzed by using independent t-test at Î± 0.05 significance level and showed statistically significant differences. The conclusion of this experiment showed that surface roughness value of micro filled composite resin was smaller than nano particle composite resin restoration. A small amount of filler particle (50.6% wt) made micro filled easier to polish and made a smooth surface restoration. Nano particle composition has more filler particle amount (78.5% wt), and hard zirconia filler that difficult to polish than silica colloidal filler in microfilled composite resin.

Setting time evaluation of injectable carbonate apatite cement using various sodium carboxymethylcellulose (Na CMC) concentration Cahyanto, Arief; Permatasari, Indah; Febrida, Renny
Padjadjaran Journal of Dentistry Vol 30, No 2 (2018): July
Publisher : Faculty of Dentistry Universitas Padjadjaran

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 37ÂºC 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.

Sintesis partikel zirkonia-alumina-silika (ZrO2-Al2O3-SiO2) dari pasir zirkon alam sebagai bahan pengisi komposit kedokteran gigiSynthesis of zirconia-alumina-silica particles (ZrO2-Al2O3-SiO2) from natural zircon sand as dental composite fillers Febrida, Renny; Joni, I Made; Susra, Silmina; Djustiana, Nina
Jurnal Kedokteran Gigi Universitas Padjadjaran Vol 29, No 1 (2017): April
Publisher : Fakultas Kedokteran Gigi Universitas Padjadjaran

Pendahuluan: Pasir zirkon (ZrSiO4) merupakan mineral alam yang tersusun atas zirkonia (ZrO2) dan silika (SiO2) yang berikatan dengan stabil. Zirkonia adalah salah satu material keramik kedokteran gigi yang banyak digunakan karena memiliki sifat mekanis dan biokompatibilitas yang tinggi. Zirkonia dapat dikombinasikan dengan silika dan alumina untuk membentuk suatu bahan pengisi komposit dengan sifat mekanis dan estetis yang dapat disesuaikan dengan sifat gigi kodrat. Tujuan dari penelitian ini adalah untuk menghasilkan bahan bahan pengisi komposit alternatif di bidang kedokteran gigi yang berasal dari pasir zirkon alam untuk dijadikan bahan bahan pengisi komposit. Metode: Jenis penelitian yang dilakukan adalah eksperimental laboratoris untuk mensintesis dan mengkarakterisasi partikel ZrO2-Al2O3-SiO2 dari bahan baku alam berupa pasir zircon dengan reaksi geopolimerisasi dan proses pemanasan suhu tinggi. Aktivator yang digunakan adalah larutan NaOH 3 mol dengan temperatur pemanasan 1100Â° C pada lama pemanasan 4 jam, 6 jam, dan 8 jam. Â Hasil: Hasil analisis uji X-Ray Diffraction (XRD) menunjukkan jumlah zirkonia berstruktur tetragonal terbesar ada pada sampel pemanasan 8 jam, yaitu 24%. Hasil analisis uji Energy Dispersive Spectroscopy (EDS) menunjukkan rasio komposisi zirkonia-alumina-silika dengan nilai zirkonia tertinggi ada pada sampel pemanasan 8 jam, yaitu 55,7 : 23,6 : 20,6. Hasil analisis mikrograf Scanning Electron Microscope (SEM) menunjukkan morfologi permukaan dan partikel yang tidak beraturan dan beraglomerasi. Simpulan: Sintesis partikel zirkonia-alumina-silika (ZrO2-Al2O3-SiO2) dari pasir zirkon alam dengan pemanasan 8 jam ditinjau dari jumlah zirkonia berstruktur tetragonal memadai digunakan sebagai bahan pengisi komposit berdasarkan uji XRD danEDS, namun pada ujiSEM partikel berbentuk tidak beraturan dan beraglomerasi.Â ABSTRACTIntroduction: Zircon sand (ZrSiO4) is a natural mineral that is composed of zirconia (ZrO2) and silica (SiO2) which binds stable. Zirconia is a dental dentistry material that is widely used because it has high mechanical properties and biocompatibility. Zirconia can be combined with silica and alumina to form a composite filler with mechanical and aesthetic properties that can be adapted to the nature of natural teeth. The purpose of this study was to produce alternative composite fillers in the field of dentistry derived from natural zircon sand to be used as composite fillers. Methods: This type of research was experimental laboratory to synthesize and characterize ZrO2-Al2O3-SiO2 particles from natural raw materials in the form of zircon sand with geopolymerization reaction and high temperature heating process. The activator used is a 3 mol NaOH solution with a heating temperature of 1100 Â° C at a heating time of 4 hours, 6 hours, and 8 hours. Results: The results of the X-Ray Diffraction (XRD) test showed that the largest number of zirconia with a tetragonal structure was on an 8-hour heating sample, which was 24%. The results of the Energy Dispersive Spectroscopy (EDS) test analysis show the highest ratio of zirconia-alumina-silica composition with zirconia values in the 8 hour heating sample, which is 55.7: 23.6: 20.6. The results of the Scanning Electron Microscope (SEM) micrograph analysis showed that the surface morphology and particles were irregular and agglomerated. Conclusion: Synthesis of zirconia-alumina-silica particles (ZrO2-Al2O3-SiO2) from natural zircon sand with 8 hours heating in terms of sufficient tetragonal zirconia amount used as composite filler based on XRD and EDS test, but in SEM test irregularly shaped particles and agglomerated.Keywords:Â Zircon sand, zirconia-alumina-silica, geopolymerisation, composite filler materials

Uji nilai kekuatan tarik serat pelepah pisang (Musa paradisiaca) sebagai bahan alternatif benang gigi biodegradable Alex Kesuma; Nina Djustiana; Yanwar Faza; Renny Febrida; Elin Karlina
Padjadjaran Journal of Dental Researchers and Students Vol 1, No 2 (2017): Oktober 2017
Publisher : Fakultas Kedokteran Gigi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjdrs.v1i1.22126

Pendahuluan: Benang gigi dari bahan sutera dipilih karena bersifat ramah lingkungan dan biodegradable namun pemanfaatanya mendapat pertentangan dari para ahli perlindugan hewan. Penelitian ini bertujuan untuk menghasilkan benang gigi dari bahan serat pisang kepok (Musa paradisiaca) yang diketahui bersifat biodegradable, memiliki kekuatan tarik yang cukup tinggi dan jumlahnya yang banyak di Indonesia. Metode: Jenis peneltiian berupa eksperimental laboratoris. Prosedur peneltiian dimulai dengan ekstraksi pelepah pisang dengan metode manual kemudian dilanjutkan dengan pengelompokan hasil serat berdasarkan jumlah helai serat. Satu kelompok benang gigi sutera (Radius® Organic Silk Floss) dan hasil serat pisang yang telah di kelompokkan sebanyak tiga kelompok (10,15 dan 20 helai) secara berurutan disebut kelompok 1 (kontrol), 2, 3 dan 4. Semua kelompok dilakukan uji kekuatan tarik menggunakan Materials Testing Machine dan data hasil di analisis menggunakan uji statistik One-way Anova Hasil: Hasil kekuatan tarik menunjukkan kelompok 1, 2, 3 dan 4 menghasilkan nilai uji kekuatan tarik secara berurutan sebagai berikut 130.73 MPa, 141.56 MPa, 391.37 MPa dan 307.06 MPa. Hasil statistik memperlihatkan terdapat perbedaan yang signifikan (p < 0,05) antara kelompok 1 dengan kelompok 3 dan 4, kelompok 2 dengan kelompok 3 dan 4 serta antara kelompok 3 dan 4. Sementara itu, tidak terdapat perbedaan yang signifikan antara kelompok 1 dan 2 (p > 0,05). Simpulan: Hasil kekuatan tarik menunjukkan kelompok 3 memiliki nilai kekuatan tarik tertinggi diantara semua kelompok. Nilai kekuatan tarik serat pisang kelompok 2, 3 dan 4 lebih tinggi dari kontrol sehingga memperlihatkan serat pisang berpotensi sebagai alternatif benang gigi biodegradable.Kata kunci: Benang gigi, biodegradable, kekuatan tarik

Sintesis partikel zirkonia-alumina-silika (ZrO2-Al2O3-SiO2) dari pasir zirkon alam sebagai bahan pengisi komposit kedokteran gigiSynthesis of zirconia-alumina-silica particles (ZrO2-Al2O3-SiO2) from natural zircon sand as dental composite fillers Silmina Susra; Nina Djustiana; Renny Febrida; I Made Joni
Jurnal Kedokteran Gigi Universitas Padjadjaran Vol 29, No 1 (2017): April
Publisher : Fakultas Kedokteran Gigi Universitas Padjadjaran

Pendahuluan: Pasir zirkon (ZrSiO4) merupakan mineral alam yang tersusun atas zirkonia (ZrO2) dan silika (SiO2) yang berikatan dengan stabil. Zirkonia adalah salah satu material keramik kedokteran gigi yang banyak digunakan karena memiliki sifat mekanis dan biokompatibilitas yang tinggi. Zirkonia dapat dikombinasikan dengan silika dan alumina untuk membentuk suatu bahan pengisi komposit dengan sifat mekanis dan estetis yang dapat disesuaikan dengan sifat gigi kodrat. Tujuan dari penelitian ini adalah untuk menghasilkan bahan bahan pengisi komposit alternatif di bidang kedokteran gigi yang berasal dari pasir zirkon alam untuk dijadikan bahan bahan pengisi komposit. Metode: Jenis penelitian yang dilakukan adalah eksperimental laboratoris untuk mensintesis dan mengkarakterisasi partikel ZrO2-Al2O3-SiO2 dari bahan baku alam berupa pasir zircon dengan reaksi geopolimerisasi dan proses pemanasan suhu tinggi. Aktivator yang digunakan adalah larutan NaOH 3 mol dengan temperatur pemanasan 1100°C pada lama pemanasan 4 jam, 6 jam, dan 8 jam. Hasil: Hasil analisis uji X-Ray Diffraction (XRD) menunjukkan jumlah zirkonia berstruktur tetragonal terbesar ada pada sampel pemanasan 8 jam, yaitu 24%. Hasil analisis uji Energy Dispersive Spectroscopy (EDS) menunjukkan rasio komposisi zirkonia-alumina-silika dengan nilai zirkonia tertinggi ada pada sampel pemanasan 8 jam, yaitu 55,7; 23,6; 20,6. Hasil analisis mikrograf Scanning Electron Microscope (SEM) menunjukkan morfologi permukaan dan partikel yang tidak beraturan dan beraglomerasi. Simpulan: Sintesis partikel zirkonia-alumina-silika (ZrO2-Al2O3-SiO2) dari pasir zirkon alam dengan pemanasan 8 jam ditinjau dari jumlah zirkonia berstruktur tetragonal memadai digunakan sebagai bahan pengisi komposit berdasarkan uji XRD dan EDS, namun pada uji SEM partikel berbentuk tidak beraturan dan beraglomerasi.Kata kunci: Pasir zirkon, zirkonia-alumina-silika, geopolimerisasi, bahan pengisi komposit ABSTRACTIntroduction: Zircon sand (ZrSiO4) is natural mineral sand which is composed of zirconia (ZrO2) and silica (SiO2) that bind in a stable condition. Zirconia is one of a ceramic that is widely used in dentistry because of its high biocompatibility and good mechanical properties. Zirconia can be combined with silica and alumina to form a bahan pengisi composite material with its esthetics and mechanical properties that can be adjusted to real tooth properties. Methods: This study focuses on a synthesis of zirconia-alumina-silica (ZrO2-Al2O3-SiO2) from natural zircon sand using a geopolymerization method and a heat treatment in high temperature. Activator used in this method is 3 mol NaOH solutions. A temperature that is used to heat is 1100° C for 4 hours, 6 hours, and 8 hours. Results: Analysis result of X-ray Diffraction (XRD) indicates that a sample with 8 hours heating time has a greatest amount of tetragonal zirconia: 24%. An analysis result of Energy Dispersive Spectroscopy (EDS) indicates that a composition ratio of zirconia-alumina-silica with a highest score in zirconia is present in a sample with 8 hours heating time, with a ratio 55,7 : 23,6 : 20,6. Analysis result of Scanning Electron Microscope (SEM) show irregularities in particles and surface morphology, and agglomerated particles. Conclusion: The study concludes that a synthesis of zirconia-alumina-silica (ZrO2-Al2O3-SiO2) particles from natural zircon sand based on the amount of tetragonal structure that is present in zirconia is suitable to be used as composite bahan pengisi materials based on XRD and EDS characterization tests. But in a SEM test, the particles show irregularities and agglomerations.Keywords: Zircon sand, zirconia-alumina-silica, composite bahan pengisi

Co-Authors Akhyar Dyni Zakyah Alex Kesuma Andi Soufyan Andi Soufyan Andiesta, Niekla Survia Arief Cahyanto Azzahra, Fauziah Cahyanto, Arief Camellia Panatarani Denny Nurdin Eddy, Diana Rakhmawati Elin Karlina Elin Karlina Elin Karlina Elin Karlina Ellyza Herda Gema Gempita, Gema Gita Retyoningrum Gita Retyoningrum, Gita HD Adhita Dharsono HD Adhita Dharsono, HD Adhita I Made Joni Idznihaq, Khairina Indah Permatasari Kosterman Usri Kosterman Usri, Kosterman Lisa Putri Lestari Lisa Putri Lestari, Lisa Putri Marina Utami Marina Utami, Marina Munawar, Adlina Hasna Munawar, Adlina Hasna Nabillah Salma, Dinda Jihan Nina Djustiana Nina Djustiana Nina Djustiana Nina Djustiana Pramudiyanti, Nindya Putra, Adria Permana Putra, Adria Permana RAMADHAN, MUHAMMAD FARHAN Rizki Yuli Amanda Rizki Yuli Amanda, Rizki Yuli Sanjaya, Arya Sekar Diva Setyanagari Silmina Susra Solihudin, Solihudin Susra, Silmina Veni Takarini Veni Takarini Viona, Nona Wulanhapsari, Madeiva Yanwar Faza Yanwar Faza

Title

Found 30 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 30 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 30 Documents
Search