PERBEDAAN KEBOCORAN MIKRO FIBER REINFORCED COMPOSITE PREFABRICATED DAN FIBER REINFORCED COMPOSITE FABRICATED SEBAGAI PASAK SALURAN AKAR

DIDI MURTIADI, drg. Pribadi Santosa, MS, SpKG

2013 | Tesis | S2 Ilmu Konservasi Gigi

Pasak fiber reinforced composite (FRC) sering menjadi pilihan sebagai bahan restorasi gigi pasca perawatan saluran akar, karena estetik dan kemampuan modulus elastisitas sehingga diharapkan bisa menambah retensi mahkota restorasi akhir pasca perawatan saluran akar. Polimerisasi semen resin yang sering terjadi adalah pengkerutan sehingga menimbulkan celah mikro antara pasak FRC dengan dinding dentin saluran akar. Tujuan penelitian ini bertujuan untuk melihat perbedaan kebocoran mikro pada pasak prefabricated FRC dan pasak fabricated FRC sebagai pasak saluran akar. Pada penelitian ini digunakan 20 gigi premolar mandibula sebagai subjek penelitian yang telah dipotong bagian mahkotanya sehingga didapatkan panjang akar yang seragam 18mm dari apikal. Dilakukan preparasi saluran akar dengan teknik crown down, pengisian dengan single cone, kemudian disimpan dalam inkubator selama 72 jam dengan suhu 37⁰C. Subjek penelitian dibagi menjadi 2 kelompok, yaitu kelompok I di insersikan pasak prefabricated FRC dan kelompok II di insersikan pasak fabricated FRC, selanjutnya gigi-gigi tersebut dilapisi dengan cat kuku dan sticky wax masing-masing satu lapis kecuali 1mm dari cavosurface saluran pasak serta direndam dalam larutan biru metilen 2 % selama 1 minggu. Subjek dibelah menjadi dua bagian arah mesiodistal lalu kebocoran mikro diamati dibawah mikroskop stereo dengan pembesaran 60x. Data dianalisis menggunakan uji t. Hasil penelitian menunjukkan terdapat perbedaan yang bermakna dari kebocoran mikro pada kelompok pasak prefabricated FRC dan pasak fabricated FRC (p<0,05). Tingkat kebocoran mikro pada pasak prefabricated FRC lebih besar daripada pasak fabricated FRC (p= 0,003).

Fiber reinforced composite (FRC) is often used as restorative material after root canal treatment mostly because of its esthetic and mod of elasticity that can be expected retention with crown restoration after endodontic treatment. Polymerization shrinkage of resin cement would cause interfacial gap between FRC post and root canal dentin wall. The aim of this study was to evaluate the microleakage of prefabricated FRC and fabricated FRC used as root canal post. In this study 20 mandibular premolar were used as research subjects where the crown were removed to obtain uniform root length of 18 mm. The root canal was prepared using crown down technique, obturated with guttapercha using single cone technique, which then kept in an incubator for 72 hours at 37⁰C. The subjects were randomly divided into 2 groups of 10, group I was restored with prefabricated FRC post and group II with fabricated FRC post. After the subjects were coated with nail polish followed by sticky wax, the subject were immersed in 2% methylene blue solution for 1 week. After rinsing and cleaning of the subject, they were cut mesio-distally. The penetration of the dye was measured using stereo microscope of 60x magnification. The result was analyzed using t test. The results showed that there was a significant differences on the microleakage of prefabricated FRC post and fabricated FRC post (p<0.05), where the microleakage of prefabricated fRC post was higher than fabricated FRC post (p =0.003).

Kata Kunci : Kebocoran mikro, pasak fiber reinforced composite, pasak prefabricated, pasak fabricated.