Electronic Theses and Dissertation

Resin komposit nanohibrida yang mengandung monomer turunan bpa seperti bis-gma dan bis-ema dapat melepaskan bpa ke dalam lingkungan rongga mulut. senyawa bisphenol-a (bpa) memiliki sifat toksik dan merusak sistem endokrin. semakin banyak jenis monomer turunan bpa yang terkandung dalam resin komposit, semakin besar potensi pelepasan bpa. salah satu faktor yang dapat mendekomposisi bpa dari monomer turunan bpa adalah kondisi lingkungan yang bersifat asam seperti minuman kopi robusta gayo. penelitian ini bertujuan untuk mengetahui pengaruh jumlah jenis monomer turunan bpa dalam resin komposit nanohibrida terhadap pelepasan bpa setelah perendaman dalam kopi robusta gayo. sebanyak 6 spesimen resin komposit nanohibrida berbentuk disk dengan diameter 6 mm dan ketebalan 2 mm disiapkan dan dibagi menjadi dua kelompok, yaitu rk 1 dengan 1 monomer turunan bpa dan rk 2 dengan 2 monomer turunan bpa. setiap spesimen direndam secara siklus, yaitu selama 20 menit dalam larutan kopi robusta gayo, kemudian 23 jam 40 menit dalam aquades. durasi perendaman dilakukan selama 7 hari. konsentrasi bpa yang terlepas dianalisis menggunakan uji kruskal–wallis. hasil penelitian menunjukkan bahwa jumlah jenis monomer turunan bpa menunjukan perbedaan bermakna antara kelompok rk 1 dan rk 2 dimana nilai pelepasan bpa rk 1 lebih rendah dibandingkan rk 2. waktu perendaman juga berpengaruh signifikan terhadap akumulasi pelepasan bpa. jumlah jenis monomer turunan bpa dan durasi perendaman memengaruhi pelepasan bpa dalam kopi robusta gayo. kata kunci : resin komposit nanohibrida, bisphenol a, jumlah jenis monomer turunan bpa, kopi robusta gayo

Nanohybrid resin composites containing BPA-derived monomers such as Bis-GMA and Bis-EMA can release BPA into the oral environment. Bisphenol-A (BPA) is known to be toxic and disruptive to the endocrine system. The greater the number of BPA-derived monomers contained in the resin composite, the higher the potential for BPA release. One of the factors that can decompose BPA from its derivative monomers is an acidic environment, such as that found in Robusta Gayo coffee. This study aimed to determine the effect of the number of BPA-derived monomer types in nanohybrid resin composites on BPA release after immersion in Robusta Gayo coffee. A total of 6 disk-shaped nanohybrid resin composite specimens with a diameter of 6 mm and a thickness of 2 mm were prepared and divided into two groups: RK 1, containing 1 BPA-derived monomer, and RK 2, containing 2 BPA-derived monomers. Each specimen underwent cyclic immersion, consisting of 20 minutes in Robusta Gayo coffee solution followed by 23 hours and 40 minutes in distilled water. The immersion cycle was conducted for 7 days. The concentration of released BPA was analyzed using the Kruskal–Wallis test. The results showed a significant difference between the RK 1 and RK 2 groups, with RK 1 exhibiting lower BPA release compared to RK 2. Immersion duration also had a significant effect on the accumulated BPA release. The number of BPA-derived monomer types and immersion duration influenced BPA release in Robusta Gayo coffee. Keywords: nanohybrid resin composite, Bisphenol-A, BPA-derived monomers, Gayo Robusta coffee