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"Objective: The aim of this research was to investigate the influence of coffee beverage on hybrid composite resin discoloration. Material and Method: This study used hybrid composite resin with A3 color, and was done by soaking composite resin plates in coffee solution for 1, 3, 5 and 7 days, corresponding to equivalent coffee usage for 6 months, 1, 1.5, and 2 years. The same measurements of reflectance were done before and after soaking into coffee solution. In the measurement, a beam from He-Ne laser is reflected by the sample to a photovoltaic cell of type BPY -47, which provides a voltage signal according to the intensity of reflected light. Results: There was a significant difference between composite resin plates before and after soaking into a coffee solution, suggesting that coffee usage will have a discoloring effect of dental composite resin."

"Latar belakang: Resin komposit bulkfill memiliki tampilan warna yang sewarna gigi dan estetik. Meningkatnya konsumsi minuman seperti red wine, teh, kopi dan coca-cola saat ini dapat menyebabkan terjadinya perubahan warna pada bulkfill. Perubahan warna restorasi merupakan hal penting yang sering dikeluhkan pasien, karena berkaitan dengan estetika. Tujuan: Mengurai pengaruh konsumsi minuman redwine, teh, kopi, dan coca-cola terhadap perubahan warna resin komposit bulkfill. Tinjauan Pustaka: Red wine mengandung flavonoid yaitu tanin dan anthocyanin, serta alkohol yang menyebabkan peningkatan efek degradasi dari permukaan resin komposit, sehingga menyebabkan absorpsi dari pigmen. Teh dan kopi mengandung mengandung Flavonoid hanya tanin yang menyebaban terjadinya diskolorasi. Coca-cola mengandung karamel yang dapat menyebabkan diskolorasi, meskipun tidak sebanyak red wine, kopi dan teh, Karena tidak mengandung flavonoid. Kesimpulan: Red wine memiliki nilai perubahan warna tertinggi pada bulkfill diikuti oleh teh, kopi, dan coca-cola.

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Background: Bulkfill composite resin has a tooth-colored and aesthetic appearance. The increasing comsumption of beverages such as red wine, tea, coffee, coca-cola can cause discoloration in bulkfill. Restoration discoloration is an important thing that patients often coplain, because it relates to aesthetics. Purpose: Analyzing the effect of consumption of red wine, tea, coffee, and coca-cola on bulkfill composite resin discoloration. Theories: Red wine contains flavonoids; tannins and anthocyanins, and alcohol which cause a increase degradation effect on the surface of the composite resin, thereby causing absorption of pigments. Tea and coffee contain flavonoids only tannins that cause discoloration. Coca-cola contains caramel which can cause discoloration, although not as much as res wine, coffee, and tea, because does not contain flavonoids. Conclusion: Red wine has the highest discoloration value in bulkfill, followed by tea, coffee, and coca-cola."

"Latar Belakang: Resin komposit monokromatik cerdas merupakan jenis terbaru dari resin komposit yang menawarkan stabilitas warna yang lebih baik dibandingkan resin komposit konvensional. Kopi, sebagai minuman yang sering dikonsumsi, diklaim dapat menyebabkan perubahan warna pada restorasi gigi. Pasta gigi pemutih dianggap efektif untuk mengembalikan warna restorasi yang mengalami perubahan warna. Tujuan: Tujuan dari penelitian ini adalah untuk mengevaluasi efek dari beberapa pasta gigi pemutih terhadap stabilitas warna resin komposit, serta efektivitas pemutihannya setelah terdiskolorasi oleh larutan kopi. Metode: Spesimen resin komposit supra-nano-filled(Omnichroma; Tokuyama, Tokyo, Jepang) (n=50) disiapkan dan dibagi menjadi lima subkelompok (n=10) : Kelompok 1, Kontrol ; Kelompok 2, Pasta gigi pemutih mengandung komposisi material abrasif (Colgate Total White- Colgate-Palmolive); Kelompok 3, Pasta gigi pemutih mengandung komposisi material kimia (Vussen 28-Osstem Oral Care Company, South Korea); Kelompok 4, Pasta gigi pemutih mengandung komposisi blue covarine (Meridol gentle white-CP-GABA, Germany); dan Kelompok 5, Pasta gigi pemutih mengandung komposisi activated charcoal (Colgate Optic White (Charcoal)-Colgate-Palmolive). Setiap subkelompok sampel disimpan dalam inkubator bersuhu 37°C selama 24 jam, direndam dalam larutan kopi selama 24 jam dan disikat selama 4 menit dengan pasta gigi masing-masing. Pengukuran warna dilakukan sebelum perendaman dalam kopi, setelah perendaman dalam kopi, dan setelah proses penyikatan, dengan membersihkan sampel secara menyeluruh dengan ultrasonic cleaner selama 1 menit sebelum setiap pengukuran. Hasil perubahan warna dianalisis menggunakan Parametric One Way ANOVA dan diikuti dengan uji Post-Hoc Bonferroni untuk menentukan perbedaan signifikan antar kelompok jika data menunjukkan perbedaan yang signifikan.Hasil: Berdasarkan hasil perbandingan antar kelompok penyikatan, terdapat perbedaan ΔE* yang signifikan secara statistik antara kelompok penyikatan dengan pasta gigi pemutih mengandung material kimia, penyikatan dengan pasta gigi pemutih mengandung material blue covarine, dan pasta gigi pemutih mengandung activated charcoal ketika dibandingkan dengan kelompok kontrol, sedangkan antara kelompok pasta gigi pemutih mengandung material abrasif tidak berbeda signifikan ketika dibandingkan dengan kelompok kontrol.Kesimpulan: Pasta gigi pemutih menunjukkan efek pemutihan pada resin komposit. Perubahan warna terbesar diperoleh setelah menggunakan pasta gigi mengandung material kimia (hydrogen peroxide), sementara perubahan warna terkecil diamati setelah menggunakan pasta gigi pemutih mengandung activated charcoal.

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Background: Smart monochromatic composite resin is the latest type of composite resin offering better color stability compared to conventional composite resins. Coffee, as a frequently consumed beverage, is claimed to cause discoloration of dental restorations. Whitening toothpastes are considered effective in restoring the color of discolored restorations.Objective: This study aims to evaluate the effects of several whitening toothpastes on the color stability of composite resin and their whitening effectiveness after being discolored by coffee solution.Methods: Supra-nano-filled composite resin specimens (Omnichroma; Tokuyama, Tokyo, Japan) (n=50) were prepared and divided into five subgroups (n=10): Group 1, Control; Group 2, Whitening toothpaste with abrasive material composition (Colgate Total White-Colgate-Palmolive); Group 3, Whitening toothpaste with chemical material composition (Vussen 28-Osstem Oral Care Company, South Korea); Group 4, Whitening toothpaste with blue covarine composition (Meridol gentle white-CP-GABA, Germany); and Group 5, Whitening toothpaste with activated charcoal composition (Colgate Optic White (Charcoal)-Colgate-Palmolive). Each subgroup sample was stored in an incubator at 37°C for 24 hours, immersed in coffee solution for 24 hours, and brushed for 4 minutes with each respective toothpaste. Color measurements were taken before immersion in coffee, after immersion in coffee, and after the brushing process, with thorough cleaning of the samples using an ultrasonic cleaner for 1 minute before each measurement. The color change results were analyzed using Parametric One-Way ANOVA followed by Bonferroni Post-Hoc test to determine significant differences between groups if the data showed significant variation.Results: Based on the intergroup comparison of brushing, a statistically significant difference in ΔE* values was found between the groups brushed with whitening toothpaste containing chemical material, whitening toothpaste containing blue covarine, and whitening toothpaste containing activated charcoal when compared to the control group. No significant difference was observed between the abrasive whitening toothpaste group and the control group. Conclusion: It can be concluded that whitening toothpastes showed a whitening effect on composite resins. The greatest color change was observed after using whitening toothpaste containing chemical materials (hydrogen peroxide), while the smallest color change was observed after using whitening toothpaste containing activated charcoal."

"Latar Belakang: Agen pemutih biasanya dibagi menjadi dua jenis aplikasi, yaitu teknik pemutihan di rumah dan di kantor. Pemutihan di kantor lebih efektif karena siklus perawatannya yang lebih pendek, kontrol rentang pemutihan yang lebih tepat, dan yang lebih penting, dapat menghasilkan pemutihan warna gigi yang memiliki nilai estetika. Tujuan: Tujuan dari penelitian ini adalah untuk menganalisis efek penerapan agen pemutih di kantor terhadap perubahan warna (ΔE) pada resin komposit mikrohidrid dan semen kaca ionomer modifikasi resin (RMGIC). Metode: Spesimen resin komposit mikrohidrid dan RMGIC (n=20) dibagi menjadi dua kelompok, masing-masing berisi 10 spesimen. Satu kelompok diperlakukan dengan agen pemutih 35% hidrogen peroksida, sedangkan kelompok kontrol direndam dalam air suling selama 24 jam tanpa aplikasi pemutih. Data nilai L*, a*, dan b* dari resin komposit dan RMGIC sebelum dan setelah aplikasi pemutih dianalisis menggunakan uji t berpasangan atau uji Wilcoxon, dan data ΔE dianalisis menggunakan uji t independen tidak berpasangan. Hasil: Terdapat perbedaan yang signifikan (p<0.05) pada perubahan kecerahan (ΔL), kromatik merah-hijau (Δa), dan kromatik kuning-biru (Δb) pada resin komposit mikrohidrid dan RMGIC sebelum dan setelah aplikasi agen pemutih. Perubahan warna (ΔE) pada resin komposit mikrohidrid dan RMGIC setelah aplikasi agen pemutih menunjukkan perbedaan yang signifikan secara statistik (p<0.05), dengan nilai berkisar antara 0.59-1.49. Kesimpulan: Total perubahan warna (ΔE) pada RMGIC setelah aplikasi pemutih lebih besar dibandingkan dengan resin komposit mikrohidrid. Kedua material menunjukkan perubahan warna yang signifikan (ΔE); namun, perubahan warna pada RMGIC terlihat secara visual, dengan nilai ΔE melebihi 1 (ΔE = 1.49).

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Latar Belakang: Agen pemutih biasanya dibagi menjadi dua jenis aplikasi, yaitu teknik pemutihan di rumah dan di kantor. Pemutihan di kantor lebih efektif karena siklus perawatannya yang lebih pendek, kontrol rentang pemutihan yang lebih tepat, dan yang lebih penting, dapat menghasilkan pemutihan warna gigi yang memiliki nilai estetika. Tujuan: Tujuan dari penelitian ini adalah untuk menganalisis efek penerapan agen pemutih di kantor terhadap perubahan warna (ΔE) pada resin komposit mikrohidrid dan semen kaca ionomer modifikasi resin (RMGIC). Metode: Spesimen resin komposit mikrohidrid dan RMGIC (n=20) dibagi menjadi dua kelompok, masing-masing berisi 10 spesimen. Satu kelompok diperlakukan dengan agen pemutih 35% hidrogen peroksida, sedangkan kelompok kontrol direndam dalam air suling selama 24 jam tanpa aplikasi pemutih. Data nilai L*, a*, dan b* dari resin komposit dan RMGIC sebelum dan setelah aplikasi pemutih dianalisis menggunakan uji t berpasangan atau uji Wilcoxon, dan data ΔE dianalisis menggunakan uji t independen tidak berpasangan. Hasil: Terdapat perbedaan yang signifikan (p<0.05) pada perubahan kecerahan (ΔL), kromatik merah-hijau (Δa), dan kromatik kuning-biru (Δb) pada resin komposit mikrohidrid dan RMGIC sebelum dan setelah aplikasi agen pemutih. Perubahan warna (ΔE) pada resin komposit mikrohidrid dan RMGIC setelah aplikasi agen pemutih menunjukkan perbedaan yang signifikan secara statistik (p<0.05), dengan nilai berkisar antara 0.59-1.49. Kesimpulan: Total perubahan warna (ΔE) pada RMGIC setelah aplikasi pemutih lebih besar dibandingkan dengan resin komposit mikrohidrid. Kedua material menunjukkan perubahan warna yang signifikan (ΔE); namun, perubahan warna pada RMGIC terlihat secara visual, dengan nilai ΔE melebihi 1 (ΔE = 1.49)."

"Objectives. The aim of this study was to compare the fracture toughness of a microhybrid and a flowable microhyrid resin composites. Methods. Test specimens (30x15x2)mm made of amicrohybrid and a flowable microhybrid were prepared in a double torsion mould and were then polymerized for 20 seconds using a light-curing device. Taken out from the mould, the specimens were than soaked in disfilled water (37°C) for 1 hour and then fractured in a double-torsion technique. t-Test was used to test significance difference between the microhybrid and flowable microhybrid resin composites. Result. The use of double-torsion technique resulted in crack initition and crack arrest which revealed Klc of 1.14 MN/m3/2 and 1.045 MN/m3/2 for the microhybrid and the flowable microhybrid resin composites, respectively. Both resin composites were insignificantly different in the fracture toughness values showed by t–Test. Conclusions. The present study suggested that there was no significant difference between the microhybrid and the flowable microhybrid resin composites tested. It appreared that filler fraction might not affect the fracture toughness of the resin composties tested."

"Tujuan :Penelitian bertujuan untuk mengetahui pengaruh aplikasi gel acidulatedphosphate fluoride terhadap perubahan warna material restoratif resin komposit bulk-fillflowable yang direndam dalam larutan kopi. Metode penelitian: Dua puluh spesimenresin komposit bulk-fill flowable berbentuk silinder berdiameter 6 mm dengan tebal 2 mmdisiapkan kemudian dibagi menjadi 2 kelompok, dengan salah satu kelompok menerimaaplikasi gel APF dan kelompok lainnya tidak. Setelah diberikan aplikasi gel, spesimenkemudian direndam di dalam larutan kopi (37oC) selama 7 hari. Pengukuran warnadilakukan dengan colorimeter pada saat sebelum perlakuan, setelah aplikasi gel APF dansetelah perendaman di dalam larutan kopi, kemudian dihitung nilai perubahan warnanyasesusai sistem CIE Lab. Analisis data menggunakan uji statistik Independent T-Testuntuk menilai perbedaan perubahan warna antara kelompok dengan dan tanpa aplikasigel APF. Hasil: Hasil menujukkan kelompok yang menerima gel APF mengalamiperubahan warna yang lebih besar (p>0.05) daripada kelompok tanpa gel APF.Kesimpulan : Dari hasil penelitian, disimpulkan bahwa aplikasi gel APF memilikipengaruh terhadap perubahan warna pada resin komposit bulk-fill flowable

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Objective: The aim of this study was to determine the effect of application of

acidulated phosphate fluoride gel on the color change of bulk-fill flowable composite

resin restorative material immersed in coffee. Methods: Twenty specimens of bulk-fill

flowable composite resin in the form of cylinders 6 mm in diameter and 2 mm in thickness

were prepared and then divided into 2 groups, with one group receiving APF gel

application and the other group not. After being given the gel application, the specimens

were then immersed in a coffee solution (37oC) for 7 days. Color measurement was

carried out with a colorimeter before treatment, after application of APF gel and after

immersion in coffee solution, then the value of the color change was calculated according

to the CIE Lab system. Data was analyzed using the independent T-Test statistical test to

assess differences in color change between groups with and without APF gel application.

Results: The results showed that the group that received the APF gel had a greater color

change (p> 0.05) than the group without APF gel application. Conclusion: From the

results of the study, it was concluded that the application of APF gel had an effect on the

color change of the flowable bulk-fill composite resin."

"Latar belakang: Resin komposit nanofill dan bulkfill memiliki tampilan warna yang estetik. Warna resin komposit dapat berubah setelah dilakukan polimerisasi dengan light curing unit. Mode penyinaran pulsa yang memberikan suhu relatif rendah pada jaringan pulpa mulai dikembangkan sebagai alternatif penyinaran konvensional atau kontinu. Tujuan: Mengetahui pengaruh penyinaran mode kontinu dan pulsa terhadap perubahan warna resin komposit nanofill serta bulkfill. Metode: Penelitian eksperimental laboratorik menggunakan 24 spesimen resin komposit yang dibagi menjadi 4 kelompok perlakuan terdiri dari 2 kelompok penyinaran (pulsa dan kontinu) dan 2 kelompok resin komposit (nanofill dan bulkfill). Spesimen berbentuk silindris dengan diameter 6 mm dan tebal 2 mm yang direndam dalam 5 ml akuades serta disimpan dalam inkubator 37˚C selama 24 jam setelah dilakukan penyinaran untuk menyelesaikan polimerisasi. Pengujian warna dilakukan sebelum dan setelah polimerisasi dengan penyinaran pada spesimen menggunakan Colorimeter sebanyak 3 kali pada sisi yang sama namun posisi berbeda lalu diambil rata-rata untuk merepresentasikan seluruh permukaannya. Hasil: ΔL*, Δa*, Δb* dan ΔE hasil penyinaran kontinu baik pada resin komposit nanofill maupun bulkfill berturut-turut berkisar -1,03 – 1,30, 0,98 – 1,78, 1,24 – 2,66, dan 2,05 – 3,37. Sebagai pembanding, resin komposit nanofill dan bulkfill menghasilkan ΔL*, Δa*, Δb*, dan ΔE masing-masing berkisar dari -1,08 – 1,16, 0,97 – 1,69, 1,30 – 2,66, dan 2,04 – 3,34. Uji statistik menggunakan Independent T-Test menunjukkan ΔL*,Δa*, Δb* dan ΔE resin komposit nanofill hasil penyinaran mode kontinu dan pulsa berbeda tidak bermakna (p>0,05). Perbedaan tidak bermakna turut pula ditemui pada ΔL*,Δa*, Δb*, dan ΔE resin komposit bulkfill hasil kedua penyinaran (p>0,05). Kesimpulan: Mode penyinaran kontinu dan pulsa menghasilkan ΔL*, Δa*, Δb*, dan ΔE resin komposit nanofill maupun bulkfill yang tidak berbeda signifikan.

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Background: Nanofill and bulkfill composite resins have an aesthetic color that could changed due to light curing polymerization. Pulse-lighting mode developed as an alternative to conventional or continous one in order to reduce temperature change on dental pulp cells. Aims: To evaluate the influence of continous-lightning and pulse-lightning mode on the discoloration of nanofill and bulkfill composite resins. Methods: Twenty four composite resin specimens devided into 2 groups of lighting mode (continous and pulse) and 2 materials (nanofill and bulkfill), 6 mm in diameter and 2 mm in thick prepared, then immersed in 8mL of aquadest and keep 37˚C incubator for 24 hours post irradiation in order to completion of polymerization. Changes in color parameter were measured using CIEL*a*b* system before and after composite resin polymerization for each specimen. Data were analyzed using Independent T-Test (p<0,05). Result: The ranges of ΔL*, Δa*, Δb* dan ΔE after continous-lighting on nanofill and bulkfill were -1,03 – 1,30, 0,98 – 1,78, 1,24 – 2,66 dan 2,05 – 3,37 respectively. In comparison, ΔL*, Δa*, Δb* dan ΔE after pulse-lighting on nanofill and bulkfill were -1,08 – 1,16, 0,97 – 1,69, 1,30 – 2,66 dan 2,04 – 3,34 respectively. ΔL*,Δa*, Δb* dan ΔE of nanofill composite resin on continous-lighting compared to pulse on nanofill composite resin exhibited no significant difference (p>0,05). The same result also found in bulkfill composite resin cured with continous-lighting compared to the pulse-lighting (p>0,05). Conclusion: Discolorization of nanofill and bulkfill composite resin induced by continous-lighting and pulse-lighting did not exhibit significanct difference.

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"The use of resin composites as posterior restoratives has markedly increased over the past decade. The patients demand for better esthetics, concerns related to possible mercury toxicity from amalgam and improvements in resin composite materials have significantly contributed the popularity of these materials. Early problems related to composites included excessive wear, less of anatomic form, post operative sensitivity, secondary caries and marginal leakage. Marginal adaptation still remains an unavoidable problem for composite restoration, especially at the gingival wall of cervical or Class II restoration. In an attempt to improve marginal sealing, many techniques and lining materials have been designed. To reduce stress generated by polymerization shrinkage, applying and curing of resin composites in layers is often recommended. Using a thick adhesive layer or a low-viscosity resin may, due to its elastic properties, serve as a flexible intermediate layer and compensate for the polymerization stress created in resin composite. Flowable composites were created by retaining the same small practicle size of traditional hybrid composite but reducing the filler content and allowing the increased resin to reduce the viscosity of the mixture. Flowable composites were introduced in 1996 as liners, fissure sealants and also in tunnel preparations. They have been suggested for Class I, II, III and V cavity restorations, preventive resin restorations and composite, porcelain and amalgam repairing. Their usage as a liner under high filled resins in posterior restorations has been shown to improve the adaptation of composites and effectively achieve clinically acceptable results. This article attempts to give a broad characteristics of different types of flowable composites. "

"Composite resin are restorative materials having color similar to teeth and have been widely used in dentistry. The successful application of composite resin influences the duration of the restoration in the oral cavity. The aim of this research is to describe the influence of artificial saliva contamination and the application of re-conditioning on tensile bond strength of composite resin to dentin. In the control group, the dentin were etched, bonding were applied and composite resin were restored on the dentin. In the group with artificial saliva contamination without re-conditioning, the dentin were etched, bonding were applied and then contaminated with artificial saliva, dried and then restired with composite resin. While the group with artificial saliva contamination with re-conditioning, the dentin were etched, bonding were applied and contaminated with artificial saliva, and then etched and applied bonding agent and restored composite resin.Bond strength test used “Universal testing machine, AG 5000. The results showed that highest value of tensile bond strength of composite resin to dentin was at the control group. It can be concluded that artificial saliva contamination decreased tensile bond strength while re-conditioning application increased it."

"Latar Belakang: Bleaching merupakan prosedur mencerahkan warna gigi dengan bantuan bahan kimia yang memiliki efek samping berupa perubahan pada permukaan material resin komposit. Sementara itu, kekasaran permukaan memainkan peran penting dalam penentuan interaksi material restorasi dengan lingkungan rongga mulut karena tekstur permukaan yang tidak baik dapat meningkatkan retensi akumulasi plak dan dapat menimbulkan penyakit lainnya. Namun, penelitian mengenai efek bleaching agent pada kekasaran permukaan melaporkan hasil yang kontroversial. Tujuan: Penelitian ini bertujuan untuk menganalisis pengaruh in-home bleaching agent terhadap kekasaran permukaan resin komposit nanofilled dan microhybrid. Metode: Resin komposit nanofilled FiltekTM Z350 XT Universal Restorative (3M ESPE) dan resin komposit microhybrid FiltekTM Z250 Universal Restorative (3M ESPE) digunakan pada penelitian ini. Sebanyak 16 spesimen disiapkan dari masing-masing jenis resin komposit yang dinyatakan oleh kelompok A resin komposit nanohybrid dan kelompok B resin komposit microhybrid (jumlah total spesimen adalah 32). Seluruh spesimen dibuat dengan penumpatan material ke dalam mould dengan diameter 6 mm dan ketebalan 2 mm menggunakan kaca preparat dengan strip seluloid kemudian diberikan beban 500 gram. In-home bleaching agent (Opalescence Tooth Whitening Systems 10% Carbamide Peroxide Concentrations) diaplikasikan selama 8-10 jam/hari. Seluruh perlakuan dilakukan pada suhu 37°C dan in-home bleaching agent dibilas setiap hari selama 1 minggu dan disimpan dalam air saline steril selama periode hiatus. Kemudian, seluruh spesimen diuji dan dicatat nilai kekasaran permukaan (Ra) dalam satuan μm dengan menggunakan alat uji surface roughness tester (Surtronic® S-128) sebelum dan sesudah perlakuan. Data dianalisis secara statistik dengan uji Paired T-Test dan Independent T-Test. Hasil: Terdapat perbedaan bermakna antara kekasaran permukaan resin komposit nanofilled dan microhybrid sebelum dan sesudah aplikasi in-home bleaching agent (p<0,005). Terdapat perbedaan bermakna antara resin komposit nanofilled dan microhybrid sesudah aplikasi in-home bleaching agent (p<0,005). Kesimpulan: In- home bleaching agent secara signifikan meningkatkan nilai kekasaran permukaan pada kedua jenis material resin komposit dengan resin komposit nanofilled lebih rendah dari resin komposit microhybrid. Kekasaran permukaan pada kedua jenis resin komposit masih dapat diterima secara klinis karena menunjukkan nilai di bawah ambang batas kritis 0,2 μm.

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Background: Bleaching is a procedure that involves lightening the color of a tooth through the application of a chemical agent, which has a side effect in the form of changes to the surface of the composite resin material. Meanwhile, surface roughness plays a vital role in determining a material’s interaction with the oral environment due to the poor surface texture of dental materials. It has a significant influence on plaque accumulation and causes other diseases. However, studies on the effect of bleaching agents on the surface roughness of dental materials have reported controversial results. Objectives: This study aimed to analyze the effect of in-home bleaching agents on the surface roughness of nanofilled and microhybrid composite resin. Methods: Nanofilled composite resin FiltekTM Z350 XT Universal Restorative (3M ESPE) and microhybrid composite resin FiltekTM Z250 Universal Restorative (3M ESPE) were used in the present study. Sixteen specimens were prepared from each type of composite resin that represented by group A for nanofilled composite resin and group B for microhybrid composite resin (total number of specimens were 32). Each specimen was prepared by compressing a sufficient amount of material into a mold of 6 mm in diameter and 2 mm in thickness using glass slides with celluloid strip, then given a load of 500 grams. In-home bleaching agents (Opalescence Tooth Whitening Systems 10% Carbamide Peroxide Concentrations) were applied 8-10 hours/day. All treatment was conducted at 37°C temperature, and an in-home bleaching agent was applied and rinsed off daily for one week and stored in distilled water during the hiatus period. Then, the surface roughness of all specimens was measured and recorded (Ra) value in μm using a surface roughness tester (Surtronic® S-128) before and after being treated. Data were statistically analyzed with Paired T-Test and Independent T-Test. Result: There was a statistically significant difference between the surface roughness of nanofilled and microhybrid composite resin before and after being bleached with an in-home bleaching agent (p<0,005). There was a statistically significant difference between nanofilled and microhybrid composite resin after being bleached with an in-home bleaching agent (p<0,005). Conclusion: In-home bleaching agent significantly increased the surface roughness value of both types of composite resin with nanofilled composite resin is lower than microhybrid composite resin. Surface roughness for both composite resins is still clinically acceptable because values tested below the critical threshold of 0,2 μm."