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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.

Mercury releasing from amalgam with disinfectan solution Diansari, Viona; Herda, Ellyza
Padjadjaran Journal of Dentistry Vol 20, No 3 (2008): November
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Amalgam is widely used for posterior restoration because of its strength compare to the other restorative materials. However, the mercury released in amalgam still becomes a controversy and its harmfull effects to human. Researches show that the mercury released occurs when mercury ion is dissolved in acid or oxidizing solutions. In dentistry, a disinfectant that is used for sterilizing instruments, such as hand instrument and handpiece previously used during the replacement process of amalgam restoration can make mercury dissolving from amalgam residue in the instruments. The number of mercury ion dissolving in disinfectant solution depends on disinfectants pH, concentration, contact time, redox potential, and Sn content in amalgam matrix phase Ag-Hg. The process of mercury released from amalgam to disinfectant solutions is caused by the ability of disinfectant in oxidizing mercury metal (elemental) to become the dissolvable mercury ion. Therefore, dentists and clinicians should be carefully certain procedures of disinfectant waste disposal that contain mercury ion, in order to avoid toxic contamination of mercury ion that can be dangerous to the environment.

PERLAKUAN PERMUKAAN PADA REPARASI RESIN KOMPOSIT DAN PENGARUHNYA TERHADAP KUAT REKAT RESIN KOMPOSIT BARUâRESIN KOMPOSIT LAMA Puspitasari, Dewi; Herda, Ellyza
Dentino Vol 1, No 1 (2016)
Publisher : FKG Unlam

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ABSTRACT Composite resin that have been restored in the oral cavity ages over time and can be fail. The total removal of the restoration is the most common procedure that is often done in daily clinical practice. This procedure may be regarded as overtreatment if only small portions of the restoration has damaged, therefore repairing composite resin could be more effective choice. The bond strength of repairing composite resin can be improved by surface treatment. Surface treatment have been categorized in several method such as surface roughening with diamond bur, air abrasion (sand blasting) with aluminum oxide, chemical treatment (etching) with phosphoric acid or hydrofluoric acid, silane coupling agent and intermediate adhesive resin (adhesive system and flowable composite). The objective of this study was to discuss repairing aged composite resin, surface treatment method that have been practiced and the influence to bond strength of repaired composite resin based on published article. Combination between suface treatment methods will result different values in bonding strength. Up to recent there are no practice best methods yet, however combination air abrasion with adhesive system or with flowable composite improving bond strength that compared to composite resin bond strength without reparation.Â ABSTRAK Restorasi resin komposit didalam rongga mulut dapat mengalami kegagalan seiring dengan waktu. Prosedur perawatan yang sering dilakukan adalah mengganti restorasi secara keseluruhan. Prosedur ini dianggap berlebihan bila hanya sedikit bagian restorasi yang rusak, sehingga memperbaiki atau reparasi resin komposit menjadi pilihan yang lebih efektif. Kuat rekat resin komposit yang diperbaiki dapat ditingkatkan dengan perlakuan permukaan antara lain pengasaran permukaan dengan bur intan, abrasi udara (sand blasting) dengan aluminium oksida, perlakuan kimia (etsa) dengan asam fosforik atau dengan asam hidrofluorik, penggunaan silane coupling agent dan intermediate adhesive resin (sistem adhesif dan flowable composite). Tujuan dari penulisan makalah ini adalah untuk menelaah pustaka mengenai reparasi resin komposit, metode perlakuan permukaan yang dilakukan dan pengaruhnya terhadap kuat rekat reparasi komposit resin berdasarkan hasil penelitian yang telah dipublikasikan. Kombinasi antara metode perlakuan permukaan menghasilkan nilai kuat rekat yang berbeda. Hingga saat ini belum ada metode perlakuan permukaan yang terbaik, tetapi kombinasi abrasi udara dengan sistem adhesif atau dengan flowable composite dapat menghasilkan kuat rekat yang sebanding dengan kuat rekat resin komposit tanpa reparasi.

APPLICATION OF GLASS IONOMER CEMENT (GIC) FOR REPAIRING DENTAL PULP BY MEASURING EXPRESSION OF DENTIN MATRIX PROTEIN-1 : APLIKASI SEMEN IONOMER KACA UNTUK PERBAIKAN PULPA GIGI DENGAN MENGUKUR EKSPRESI DENTIN MATRIKS PROTEIN-1 Endang Suprastiwi; Siti Mardewi Soerono Akbar; Narlan Sumawinata; Ellyza Herda
Dentika: Dental Journal Vol. 17 No. 4 (2013): Dentika Dental Journal
Publisher : TALENTA

Glass ionomer cement (GIC) has a potential to improve the pulp by inducing Dentin Matrix Protein-1 (DMP-1) release that can mineralize dentin. This study used three types of glass ionomer cements; Conventional GIC i.e. GC Fuji IX; resin-modified glass ionomer cement (RMGIC) i.e. GC Fuji II LC and Nano particle of RMGIC i.e. Ketacâ„¢ N100 3MEspe. The three materials were applied to the tooth pulp of Macaca nemestrina. Expression of DMP-1 extract-dental pulp of the subjects was investigated by using ELISA. This study was statistically analyzed by using Mann-Whitney test. The result showed that GICs has a potential to induce the expression of DMP-1 and there was no significant differences among the three groups of GIC to induce DMP-1(pâ‰¥ 0,05). In conclucion, all tested materials have a potential in dental pulp repair by expressing DMP-1.

IMPLAN ZIRKONIA TIPE Y-TZP SEBAGAI PIRANTI ALTERNATIF PILIHAN SELAIN IMPLAN TITANIUM : TYPE Y-TZP ZIRCONIA IMPLANT AS AN ALTERNATIVE CHOICE BESIDES TITANIUM IMPLANT Dewi Puspitasari; Ellyza Herda
Dentika: Dental Journal Vol. 17 No. 4 (2013): Dentika Dental Journal
Publisher : TALENTA

Penggunaan implan dalam bidang kedokteran gigi telah berkembang sejak lama saat pertama kali implan berbahan dasar titanium digunakan untuk menggantikan gigi yang hilang. Sejak saat itu titanium menjadi material pilihan untuk penggunaan implan karena biokompatibilitas dan sifat mekaniknya yang baik. Adanya efek yang tidak diinginkan dari implan titanium, menjadikan material lain yaitu zirkonia sebagai material pilihan alternatif selain titanium. Keuntungan zirkonia sebagai implan antara lain biokompatibilitas dan sifat mekaniknya yang baik terutama resistensi terhadap fraktur melalui mekanisme â€œtoughening transformationâ€. Mekanisme â€œtoughening transformationâ€ terjadi pada zirkonia yang telah distabilisasi dengan oksida yttria (Y-TZP), sehingga stress yang terjadi pada permukaan zirkonia akan menghasilkan perubahan volumetrik pada struktur kristal dari fasa tetragonal menjadi fasa monoklinik. Sebagai kesimpulan, material keramik zirkonia terutama Y-TZP (tetragonal zirconia polycrystal) dapat digunakan sebagai material implan kedokteran gigi yang sebanding dengan implan titanium.

Effect of Salivary pH on Water Absorption and Solubility of Enhanced Resin- Modified Glass Ionomer Eriwati, Yosi Kusuma; Dhiaulfikri, Muhammad; Herda, Ellyza
Journal of Dentistry Indonesia Vol. 27, No. 3
Publisher : UI Scholars Hub

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The influence of immersion period and liquid pH on water absorption capacity and solubility of the resin-modified glass ionomer cement (RMGIC) raises the question of whether the critical pH of hydroxyapatite and fluoroapatite influences the water absorption capacity and solubility of enhanced resin-modified glass ionomer (ERMGI). Objective: This study was designed to investigate the effects of immersion periods and various pH levels of artificial saliva on the water absorption and solubility of RMGIC and ERMGI. Methods: Fifty-four disc-shaped specimens (15 mm x 1 mm) of enhanced RMGI (ACTIVATM BioACTIVE-RESTORATIVE, Pulpdent, Watertown, MA, USA) and 54 disc-shaped specimens (15 mm x 1 mm) of RMGIC (Fuji II LC Capsules, GC Corp, Tokyo, Japan) were prepared. Both materials were divided into 9 groups based on artificial saliva pH (pH 7, pH 5.5, and pH 4.5) and immersion time (1, 7, and 14 days). Water absorption and solubility were measured based on ISO 4049: 2009. Data were analyzed statistically using one-way ANOVA. Results: The results showed significant differences in water absorption and solubility value between RMGIC and enhanced RMGI for all the groups. Both materials showed increased water absorption and solubility when immersed in artificial saliva that exhibited a lower pH level and under higher immersion period. Conclusion: Lower pH levels and longer immersion time influence the water absorption and solubility of enhanced RMGI and RMGIC.

PERLAKUAN PERMUKAAN PADA REPARASI RESIN KOMPOSIT DAN PENGARUHNYA TERHADAP KUAT REKAT RESIN KOMPOSIT BARU–RESIN KOMPOSIT LAMA Dewi Puspitasari; Ellyza Herda
Dentino : Jurnal Kedokteran Gigi Vol 1, No 1 (2016)
Publisher : FKG Unlam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/dentino.v1i1.420

ABSTRACT Composite resin that have been restored in the oral cavity ages over time and can be fail. The total removal of the restoration is the most common procedure that is often done in daily clinical practice. This procedure may be regarded as overtreatment if only small portions of the restoration has damaged, therefore repairing composite resin could be more effective choice. The bond strength of repairing composite resin can be improved by surface treatment. Surface treatment have been categorized in several method such as surface roughening with diamond bur, air abrasion (sand blasting) with aluminum oxide, chemical treatment (etching) with phosphoric acid or hydrofluoric acid, silane coupling agent and intermediate adhesive resin (adhesive system and flowable composite). The objective of this study was to discuss repairing aged composite resin, surface treatment method that have been practiced and the influence to bond strength of repaired composite resin based on published article. Combination between suface treatment methods will result different values in bonding strength. Up to recent there are no practice best methods yet, however combination air abrasion with adhesive system or with flowable composite improving bond strength that compared to composite resin bond strength without reparation. ABSTRAK Restorasi resin komposit didalam rongga mulut dapat mengalami kegagalan seiring dengan waktu. Prosedur perawatan yang sering dilakukan adalah mengganti restorasi secara keseluruhan. Prosedur ini dianggap berlebihan bila hanya sedikit bagian restorasi yang rusak, sehingga memperbaiki atau reparasi resin komposit menjadi pilihan yang lebih efektif. Kuat rekat resin komposit yang diperbaiki dapat ditingkatkan dengan perlakuan permukaan antara lain pengasaran permukaan dengan bur intan, abrasi udara (sand blasting) dengan aluminium oksida, perlakuan kimia (etsa) dengan asam fosforik atau dengan asam hidrofluorik, penggunaan silane coupling agent dan intermediate adhesive resin (sistem adhesif dan flowable composite). Tujuan dari penulisan makalah ini adalah untuk menelaah pustaka mengenai reparasi resin komposit, metode perlakuan permukaan yang dilakukan dan pengaruhnya terhadap kuat rekat reparasi komposit resin berdasarkan hasil penelitian yang telah dipublikasikan. Kombinasi antara metode perlakuan permukaan menghasilkan nilai kuat rekat yang berbeda. Hingga saat ini belum ada metode perlakuan permukaan yang terbaik, tetapi kombinasi abrasi udara dengan sistem adhesif atau dengan flowable composite dapat menghasilkan kuat rekat yang sebanding dengan kuat rekat resin komposit tanpa reparasi.

Mercury releasing from amalgam with disinfectan solution Viona Diansari; Ellyza Herda
Padjadjaran Journal of Dentistry Vol 20, No 3 (2008): November 2008
Publisher : Faculty of Dentistry Universitas Padjadjaran

Amalgam is widely used for posterior restoration because of its strength compare to the other restorative materials. However, the mercury released in amalgam still becomes a controversy and its harmfull effects to human. Researches show that the mercury released occurs when mercury ion is dissolved in acid or oxidizing solutions. In dentistry, a disinfectant that is used for sterilizing instruments, such as hand instrument and handpiece previously used during the replacement process of amalgam restoration can make mercury dissolving from amalgam residue in the instruments. The number of mercury ion dissolving in disinfectant solution depends on disinfectants pH, concentration, contact time, redox potential, and Sn content in amalgam matrix phase Ag-Hg. The process of mercury released from amalgam to disinfectant solutions is caused by the ability of disinfectant in oxidizing mercury metal (elemental) to become the dissolvable mercury ion. Therefore, dentists and clinicians should be carefully certain procedures of disinfectant waste disposal that contain mercury ion, in order to avoid toxic contamination of mercury ion that can be dangerous to the environment.

Aplikasi klorheksidin glukonat 2%pada dentin tidak mempengaruhi kuat rekat geserkomposit resinyangmenggunakansistem adesif self etch (2% Chlorhexidine gluconate application on dentine does not affect bond strength of resin composite using self etch adhesive system) Dewi Puspitasari; Andi Soufyan; Ellyza Herda
Journal of Dentomaxillofacial Science Vol. 13 No. 1 (2014): Formerly Jurnal Dentofasial ISSN 1412-8926
Publisher : DiscoverSys Inc.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15562/jdmfs.v13i1.379

Composite resin is a widely used aesthetic restoration. The restoration can fail due to secondary caries. Chlorhexidinegluconate 2% is used as a cavity disinfectant to eliminate microorganisms on the prepared cavity and to prevent thesecondary caries. The purpose of this study was to analyze the effect of chlorhexidine gluconate 2% to the bondstrength of composite resin with self etch system adhesive on dentine. Sixteen specimens of buccal dentine of premolarscrown are divided into 2 different groups. Group I: Clearfil SE Bond self-etch primer was applied for 20 seconds,Clearfil SE Bond bonding was applied for 5 seconds and polymerized for 10 seconds. Composite resin was constructedincrementally and polymerized for 20 seconds. Group II: prior to self etch primer application as in group I,chlorhexidine gluconate 2% was applied for 15 seconds. Shear bond strength was tested using Testing machine andanalyzed with unpaired T test. The highest shear bond strength was obtained by applying chlorhexidine gluconate 2%.The study concludes that chlorhexidine gluconate 2% application to dentine did not affect significantly to the bondstrength composite resin using self etch adhesive systems.

Pengaruh Susu Sapi dan Protein Whey Terhadap Kekerasan Email Gigi Setelah Demineralisasi Liesma Dzulfia; Mia Damiyanti; Ellyza Herda
Jurnal Material Kedokteran Gigi Vol 5 No 2 (2016): JMKG Vol 5 No 2 September 2016
Publisher : Ikatan Peminat Ilmu Material dan Alat Kedokteran Gigi (IPAMAGI)

Caries has high prevalence oral problem in Indonesia. Bovine milk and its product has been proven to have anticariogenic effect. To analyze effect of immersed enamel surface in bovine milk and protein whey after demineralization. Twenty one specimens of human premolar tooth enamel measured its hardness before the treatment, after demineralized with 1% citric acid (pH 2.5), and after immersed in bovine milk, whey protein and aquades for 90 minutes. Enamel hardness number was measured using Knoop Microhardness Tester with 25 g load for 5 seconds. Statistical analysis with Repeated Anova showed significant increased of enamel hardness in bovine milk and protein whey groups (p<0.05). There was no significant differences between group immersed in bovine milk and whey protein (p>0.05). Bovine milk and whey protein could remineralize enamel surface but not be able to restore the original value of email surface hardness.

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