PENGARUH TEKNIK AKTIVASI DAN WAKTU PASCA APLIKASI BAHAN GIGI TIRUAN CEKAT SEMENTARA RESIN KOMPOSIT TERHADAP KEKUATAN FLEKSURAL

A.A.A.AGUNG SUBIANTARI DEWI, Prof. Dr. drg. Haryo Mustiko Dipoyono, M.S., Sp.Pros(K).

2015 | Tesis | SP PROSTODONSIA

Gigi tiruan cekat sementara dapat mengalami kerusakan sesaat setelah pemasangan karena langsung menerima tekanan kunyah. Kekuatan fleksural yang cukup tinggi dibutuhkan dari tahap awal sampai protesa definitif dipasang, sehingga diperlukan bahan dan teknik yang menjamin ketahanan restorasi. Tujuan penelitian ini adalah untuk mengetahui pengaruh teknik aktivasi dan waktu pasca aplikasi gigi tiruan cekat resin komposit terhadap kekuatan fleksural. Penelitian ini menggunakan 30 sampel bahan gigi tiruan cekat sementara resin komposit berbentuk plat berukuran (2x2x25 mm), terbagi dalam 10 kelompok yang terdiri dari 3 buah sampel dalam setiap kelompok. Lima kelompok dengan teknik aktivasi chemical-cured dan lima kelompok berikutnya dengan teknik aktivasi dual-cured. Masing-masing kelompok direndam dalam akuades dan disimpan di inkubator suhu 37 ° C dengan lama waktu perendaman yang berbeda yaitu 1 jam, 3 jam, 1 hari, 3 hari, dan 7 hari, kemudian sampel diuji kekuatan fleksuralnya dengan alat Universal Testing Machine (Pearson Panke Equipment Ltd., London). Data dianalisis dengan ANAVA dua jalur dan dilanjutkan uji Least Significant Difference (LSD). Hasil penelitian menunjukkan bahwa terdapat berbedaan bermakna antara teknik aktivasi, waktu pasca aplikasi bahan, dan kombinasi antara teknik aktivasi dan waktu pasca aplikasi bahan gigi tiruan cekat sementara resin komposit terhadap kekuatan fleksural nilai p<0,05. Kesimpulan penelitian ini adalah 1)Teknik aktivasi dual-cured menunjukkan kekuatan fleksural yang lebih tinggi daripada teknik aktivasi chemical-cured 2)Bertambahlamanya waktu pasca aplikasi meningkatkan kekuatan fleksural bahan gigi tiruan cekat sementara resin komposit

Provisional restoration often suffers damage not long after insertion procedure due to immediate occlusal forces. Provisional restoration with high flexural strength must be obtained from initial stage until completion of definitive prosthesis, therefore we have to consider material and fabrication technique that meet the requirements of a provisional restoration to guarantee the restoration's resistance. The aim of this study was to investigate the influence of activation technique and time after application of resin composite provisional restoration towards its flexural strength. This study used thirty rectangular samples (2x2x25mm) of resin composite provisional restoration material. Samples were divided into ten groups, each group consisted of three samples. Five groups were made with chemical-cured activation technique and the other five groups by dual-cured activation technique. Each group was soaked in aquadest solution and incubated at temperature of 37°C with different soaking time which were 1 hour, 3 hours, 1 day, 3 days, and 7 days. Flexural strength of samples then were tested using Universal Testing Machine (Pearson Panke Equipment Ltd., London). The data were analyzed with two-way ANOVA and continued by Least Significant Difference (LSD) test. The results showed that : there was a significant influence between activation technique, time after material application, and combination of both of it in resin composite provisional restoration toward flexural strength(p<0.05). The conclusions of this study were: 1) Dual-cured activation technique showed higher flexural strength than chemical-cured activation technique 2) Increased time after application influenced the increasing flexural strength resin composite provisional restoration.

Kata Kunci : gigi tiruan cekat sementara, resin komposit, teknik aktivasi, waktu pasca aplikasi, kekuatan fleksural