Pengaruh Lama Perendaman Fiber Reinforced Composite dengan Fiber Sisal (Agave sisalana) Teralkalisasi dalam Saliva Buatan Terhadap Perubahan Dimensi

DIVA A D WIBOWO, Prof. Dr. drg. Widjijon, S.U ; Prof. Dr. drg. Widowati Siswomihardjo, M.S

2015 | Skripsi | S1 PENDIDIKAN DOKTER GIGI

Fiber reinforced composite (FRC) merupakan bahan yang tersusun atas matriks dan material penguat berupa fiber. Fiber sisal merupakan fiber alami yang menjadi alternatif fiber sintetis yang sedang dikembangkan sebagai bahan kedokteran gigi. Matriks resin komposit memiliki sifat hidrofilik menyebabkan perubahan dimensi. Fiber sisal dialkalisasi sehingga mengurangi kemampuan hidrofilisitas yang mempengaruhi perubahan dimensi. Penelitian ini bertujuan untuk mengetahui pengaruh variansi lama perendaman terhadap perubahan dimensi. Bahan penelitian yang digunakan yaitu FRC dengan matriks berupa resin komposit flowable (Master Flow, Brazil) dan fiber sisal teralkalisasi. Sampel penelitian berbentuk balok ukuran 25x2x2 mm, fiber diletakkan ditengah sampel dengan arah continuous unidirectional, kemudian disinari menggunakan LCU selama 20 detik. Sampel berjumlah 16 buah dibagi menjadi 4 kelompok yaitu perendaman 0 hari, 7 hari, 14 hari dan 21 hari. Perubahan dimensi dihitung dengan dimensi akhir dikurang dimensi awal. Dimensi diukur panjang, lebar dan tinggi menggunakan jangka sorong digital dengan nonius 0,001 mm. Sampel direndam dalam saliva buatan pH 7. Analisis data dilakukan menggunakan one way ANOVA dilanjutkan dengan LSD0,05. Hasil penelitian perubahan dimensi rerata dan simpangan baku lama perendaman 0, 7, 14 dan 21 hari berturut-turut 0,264 ± 0,085 ; 2,886 ± 0,089 ; 4,417 ± 0,115 dan 4,294 ± 0,087 mm3. Hasil nilai F pada uji One way ANOVA adalah 1,640x103 dan nilai probabilitas sebesar 0,00 (p<0,05), artinya terdapat perbedaan yang bermakna. LSD0,05 menunjukkan perbedaan rerata yang bermakna antar semua kelompok, kecuali hari ke 14 dan 21. Kesimpulan penelitian adalah variansi lama perendaman memberikan pengaruh bermakna terhadap perubahan dimensi FRC dengan fiber sisal teralkalisasi.

Fiber reinforced composite (FRC) is a material composed of matrix and reinforced by fiber. Fiber sisal is a natural fiber, an alternatives synthetic fiber developed as dental material. Resin composite matrix is a hydrophilic substance that can cause dimensional change. Alkalization of fiber sisal reduces the ability of hydrophilic sites which affects the dimensional changes. The aim of this study was to determine how different period of immersion affect dimensional change in samples. The samples used in this research were FRC made from flowable resin composite (Master Flow, Brazil) and alkalized fiber sisal. The samples were shaped into cuboid measuring 25x2x2 mm. Fiber was placed in the middle of sample with continuous unidirectional direction and then irradiated for 20 seconds using LCU. A total of 16 samples were divided to 4 groups, each group with the different period of immersion 0, 7, 14 and 21 days respectively. Dimensional changes were measured by the final dimension minus the initial dimension. Dimension was measured by the length, width, and height using digital sliding caliper with 0,001 mm nonius. The samples were immersed in the artificial saliva with pH 7. The data was analyzed using one way ANOVA and followed by LSD0,05. The result shows the mean value and standard deviation of dimensional changes with period of immersion at 0, 7, 14 and 21 days, were 0.264 ± 0.085, 2.856 ± 0.089, 4.417 ± 0.115 and 4.294 ± 0.087 mm3. The F value obtained from one way ANOVA was 1.640 X 103 and the significance was 0.00 (P<0.05), indicated a significance difference. LSD0,05 presented a significance difference of mean to all treatment groups, except for 14th and 21th day. This study concluded that various period of immersion gave significant effect to the dimensional changes of FRC with alkalized fiber sisal.

Kata Kunci : FRC fiber sisal teralkalisasi, lama perendaman, perubahan dimensi