PENGARUH DERAJAT KEASAMAN SALIVA TERHADAP MICROHARDNESS PLAT GIGI TIRUAN POLYAMIDE DAN POLYCARBONATE

YUYUS MOHAMMAD ILYAS DJUNAEDI, Drg. Endang Wahyuningtyas, M.S., Sp. Pros.(K)

2014 | Tesis | SP PROSTODONSIA

Bahan gigi tiruan dituntut mampu bertahan dalam lingkungan rongga mulut karena akan berinteraksi dengan berbagai macam substansi eksogen seperti asam dan basa selama proses mastikasi. Penelitian ini bertujuan untuk mengkaji pengaruh derajat keasaman saliva terhadap microhardness plat gigi tiruan thermoplastic resin. Penelitian ini merupakan penelitian eksperimental laboratoris dengan subyek penelitian polyamide dan polycarbonate berbentuk plat berukuran 64mm x 10mm x 2,5 mm sejumlah 80 buah. Perlakuan dibagi menjadi 8 kelompok, masing-masing direndam akuades steril selama 2 hari dan direndam dalam saliva tiruan dengan pH 4, pH 6, pH 8 dan akuades steril sebagai kontrol selama 7 hari dalam inkubator. Pengujian microhardness menggunakan Vickers Tester. Data dianalisis dengan Anava dua jalur dan uji LSD Hasil penelitian dengan uji Anava dua jalur menunjukkan bahwa derajat keasaman saliva berpengaruh signifikan terhadap microhardness polyamide dan polycarbonate (p<0,05). Hasil LSD menunjukkan perbedaan yang signifikan pada kelompok polyamide pH 4, pH 6, dan pH 8 (p<0,05). Kesimpulan penelitian ini adalah derajat keasaman saliva berpengaruh terhadap microhardness polyamide dan polycarbonate sebagai plat gigi tiruan. Penurunan terbesar nilai microhardness polyamide dan polycarbonate terjadi pada perendaman saliva pH 4. Penurunan microhardness setelah perendaman dalam saliva tiruan pada polyamide lebih tinggi dari polycarbonate. Kata kunci: derajat keasaman saliva, microhardness, polyamide, polycarbonate

Denture base material are expected to withstand in the oral environment due to their interaction with acidity and alkalinity from exogenous substances during mastication. The aim of the research was to evaluate the effect of saliva pH level to microhardness of thermoplastic resin as denture base material. The experimental laboratory research was used the subject of 80 plates of polyamide and polycarbonate with dimension of 64mmx10mmx2.5mm. The treatment were divided into 8 groups, each group consisted of 10 plates which were immersed in saliva with pH level 4; 6; 8, and strelized aquades as a control group for 7 days strored in incubator with temperature of 370C. The microhardness measurements were done by the Vickers Tester machine. The datas were analyzed statistically by two way Anova and LSD. The result of the research by two way Anova showed that the saliva pH level significantly influence toward the microhardness of polyamide and polycarbonate (p<0.05). LSD test showed the significant difference in polyamide group immersed in saliva pH 4, pH 6, and pH 8 (p<0.05). In summary, the saliva pH level influenced toward the microhardness of polyamide and polycarbonate. The decreasing saliva pH level would decrease the microhardness of polyamide and polycarbonate. The microhardness decreasing of polyamide after immersed in saliva was higher than polycarbonate Keywords : saliva pH level, microhardness, polyamide, polycarbonate

Kata Kunci : derajat keasaman saliva, microhardness, polyamide, polycarbonate; saliva pH level, microhardness, polyamide, polycarbonate