PENGARUH LAMA PENYINARAN TERHADAP KEBOCORAN MIKRO RESTORASI RESIN KOMPOSIT BULK FILL

Intan Dhamayanti, drg. Tunjung Nugraheni, M.Kes., Sp.KG.

2013 | Tesis | S2 Ilmu Konservasi Gigi

Kebocoran mikro terjadi akibat pengerutan resin komposit saat polimerisasi sehingga menimbulkan sensitivitas pasca restorasi, karies sekunder, pewarnaan, dan kegagalan restorasi. Tujuan penelitian ini untuk mengetahui pengaruh lama penyinaran (10, 20, dan 40 detik) terhadap kebocoran mikro restorasi resin komposit bulk fill. Duapuluh satu gigi molar dipreparasi kavitas kelas I dengan diameter 1,8mm dan kedalaman 4mm. Semua sampel diberi self etch adhesive (Tetric N- Bond Self Etch, Ivoclar) dan aplikasi resin komposit bulk fill 4mm (Tetric N- Ceram Bulk Fill, Ivoclar). Sampel dibagi dalam 3 kelom pok, yaitu Kelompok I (diaktivasi sinar 10 detik), kelompok II (20 detik), dan kelompok III (40 detik). Sampel dilapisi cat kuku dan direndam metilen biru 2%, selanjutnya sampel dibelah kemudian kebocoran mikro diamati dengan mikroskop stereo pembesaran 100X dan dinilai dengan skor 0-3. Analisis data menggunakan uji Kruskal-Wallis menunjukkan lama penyinaran berpengaruh terhadap kebocoran mikro restorasi resin komposit bulk fill (p<0,05). Hasil uji U-Mann W hitney menunjukkan Kelom pok I (10 detik) memiliki kebocoran mikro yang lebih rendah secara bermakna dibandingkan Kelompok II (20 detik) dan kelompok III (40 detik) (p< 0,05). Lama penyinaran 20 detik dan 40 detik tidak menunjukkan perbedaan bermakna (p> 0,05). Kesimpulan pada penelitian ini adalah lama penyinaran berpengaruh terhadap kebocoran mikro restorasi resin komposit bulk fill. Kebocoran mikro pada restorasi resin komposit bulk fill dengan lama penyinaran 10 detik memiliki kebocoran terkecil dibanding lama penyinaran 20 detik dan 40 detik.

Mikroleakage occurs due to polymerization shrinkage of resin composite. This would result in post restoration sensitivity, secondary carries, discoloration, and restoration failure. The aim of this study was to investigate the influence of light curing exposure time (10, 20, and 40 sec) on microleakage of bulk fill resin composite Twenty one molar teeth were used in this study. All teeth were made class I cavity preparation with the diameter of 1,8mm and 4mm depth. The application of self etch adhesive and bulk fill resin composite 4mm were used for all samples. Samples were divided into 3 groups of each: group I (activated by the light curing for 10 sec), group II (20 sec), and group III (40 sec). All samples were coated using nail polish and immersed in 2% methylene blue. Afterwards all samples were sectioned and observed for microleakage using stereo microscope at 100X magnification and were evaluated by score 0-3. Data that were analyzed using Kruskal-Wallis test showed that the duration of light curing influence the mikroleakage of bulk fill resin composite (p<0,05). Analysis using U-Mann Whitney test demonstrated that group I (duration of 10 sec) had smaller microleakage significantly than group II (20 se c) as well as group III (40 sec) (p< 0,05). Duration of 20 sec and 40 sec did not reveal a significant difference (p> 0,05). The conclusion of this study, the exposure time of light curing influenced the microleakage of bulk fill resin composite. The exposure time of light curing for 10 sec had smallest microleakage than for 20 sec and 40 sec.

Kata Kunci : Lama penyinaran, kebocoran mikro, resin komposit bulk fill