PENGARUH LAMA APLIKASI BAHAN BLEACHING HIDROGEN PEROKSIDA 40% TERHADAP KEBOCORAN MIKRO RESTORASI RESIN KOMPOSIT HIBRIDA

RISTA PUTRI SOEWANTRIJAYA, drg. Tunjung Nugraheni, M. Kes, Sp. KG.

2014 | Skripsi | PENDIDIKAN DOKTER GIGI

Bleaching merupakan perawatan untuk memutihkan gigi. Salah satu bahan yang digunakan adalah hidrogen peroksida. Resin komposit hibrida merupakan bahan tumpatan yang sering dipakai dalam kedokteran gigi karena estetik dan kekuatannya yang baik. Hidrogen peroksida diketahui memiliki dampak negatif terhadap gigi dan restorasi resin komposit, karena dapat menyebabkan denaturasi protein dan perubahan struktur anorganik gigi. Terdapat residu hidrogen peroksida yang dapat menyebabkan kebocoran mikro restorasi resin komposit. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh lama aplikasi bahan bleaching hidrogen peroksida 40% terhadap kebocoran mikro restorasi resin komposit hibrida. Objek penelitian adalah 34 buah gigi premolar maksila dipreparasi kavitas kelas I pada sisi bukal, diameter 3 mm, kedalaman 2 mm. Kavitas di etsa (Scotchbond asam fosfat 35%, 3M ESPE) dan diaplikasikan bahan bonding (Adper Single bond 2, 3M ESPE) lalu ditumpat resin komposit hibrida (Filtek Z100, 3M ESPE). Objek dibagi 2 kelompok. Kelompok 1 diaplikasikan hidrogen peroksida 40% (Opalescense Boost) selama 20 menit. Kelompok 2 diaplikasikan hidrogen peroksida 40% (Opalescense Boost) selama 60 menit. Kedua kelompok direndam saliva buatan (pH 6,8) dan di inkubasi (suhu 37 0 C) selama 24 jam. Kemudian dilakukan thermocycling dengan suhu 5 0 C dan 55 0 C. Seluruh objek dilapisi cat kuku dan sticky wax, kemudian direndam dalam larutan methylene blue 2% selama 24 jam. Gigi dibelah menjadi 2 dari arah bukal ke palatal dan diamati di bawah mikroskop digital komputer perbesaran 60x. Selanjutnya, data di analisis menggunakan uji U Mann-Whitney (p<0,05) Hasil penelitian menunjukkan kebocoran mikro yang terjadi pada kelompok yang diaplikasikan hidrogen peroksida 40% selama 60 menit lebih besar dibandingkan dengan yang diapliaksikan selama 20 menit. Uji analisis U Mann Whitney menunjukkan perbedaan kebocoran mikro yang signifikan dari kedua kelompok. Maka dapat disimpulkan bahwa lama aplikasi bahan bleaching hidrogen peroksida 40% berpengaruh terhadap besarnya kebocoran mikro restorasi resin komposit hibrida.

Bleaching is a treatment to whiten the teeth. One of bleaching materials is hydrogen peroxide. Hybrid composite resin is a restorative material which commonly used in dentistry due to it’s aesthetic and good strength. Hydrogen peroxide is known to have a negative impact on the tooth and composite resin restoration such as proteins denaturation that may cause inorganic structure alteration of the teeth. There is a residue of hydrogen peroxide which can cause microleakage of composite resin restorations. The aim of this study was to determine the effect of time application 40% hydrogen peroxide bleaching materials towards microleakage of hybrid composite resin restorations. The object of this research were 34 maxillary premolar which were prepared with class I cavity on buccal side with 3mm diameter, and 2mm depth. The cavity were etched (35% Scotchbond phosphoric acid, 3M ESPE) and were applied with bonding materials (Adper Single Bond 2, 3M ESPE) then filled with hybrid composite resin (Filtek Z100, 3M ESPE). The object were divided into two groups. Group 1 was applied with 40% hydrogen peroxide (Opalescense Boost) for 20 minutes. Group 2 was applied with 40% hydrogen peroxide (Opalescense Boost) for 60 minutes. Both groups were immersed with artificial saliva (pH 6.8) and were incubated (37 o C) for 24 hours. Then, both groups were thermocycled with 5 o C and 55 o C. The object were coated with nail polish and sticky wax, then immersed in 2% methylene blue solution for 24 hours. The teeth were split from buccal to palatal and were observed under digital computer microscope with 60 magnification. Furthermore, the data were analyzed with Mann-Whitney U test (p<0.05). The result showed that the microleakage which occurred in the group that was applied to 40% hydrogen peroxide for 60 minutes were greater than the group that was applied for 20 minutes. Mann-Whitney U test showed a significant microleakage difference in both groups. In conclusion, the time application of 40% hydrogen peroxide bleaching materials affect on the amount of hybrid composite resin microleakage.

Kata Kunci : Bleaching, Hidrogen peroksida, resin komposit hibrida, kebocoran mikro