Pengaruh lama pengetsaan menggunakan asam fosfat 37 persen terhadap kekuatan geser perlekatan porselen dengan resin komposit sinar tampak :: Penelitian eksperimen laboratoris

SUMONO, Agus, Dr.drg. Widowati S., MS

2005 | Tesis | S2 Ilmu Kedokteran Gigi

Memperbaiki restorasi gigi porselen dengan menggunakan resin komposit sinar-tampak membutuhkan perlekatan yang kuat. Tujuan penelitian ini adalah untuk mengetahui pengaruh lamanya pengetsaan dengan asam fosfat 37% terhadap kekuatan geser perlekatan antara porselen dengan resin komposit sinar-tampak. Dua puluh disk porselen (VINTAGE Metalbond Porcelain) tanpa glazing diameter 10 mm, tebal 3 mm di bagi menjadi 4 kelompok. Kelompok A tidak dietsa (kontrol), kelompok B dietsa 30 detik, kelompok C dietsa 40 detik, kelompok D dietsa 50 detik. Resin komposit sinar-tampak (FiltekTM P60, 3M ESPE) dilekatkan pada permukaan porselen yang sudah teretsa dan teraplikasi bahan bonding yang mengandung silan (Rely XTM Ceramic Primer, 3M ESPE), kemudian disinar selama 40 detik. Sebelum dilakukan uji kekuatan geser, spesimen disimpan dalam aquades 370C selama 24 jam. Uji kekuatan geser perlekatan dilakukan me nggunakan alat Pearson Panke Equipment Ltd., dengan kecepatan gaya 0,5 mm/menit sampai resin komposit lepas dari porselen. Hasil penelitian menunjukkan bahwa rerata kekuatan geser perlekatan terkecil didapatkan pada kelompok kontrol (5,962 Mpa), dan terbesar didapatkan pada kelompok yang dietsa 50 detik (18,860Mpa). Hasil uji anava satu jalur menunjukkan adanya perbedaan bermakna nilai kekuatan geser perlekatan pada kelompok A, B, C, dan D (p=0,05). Uji LSD menunujukkan perbedaan kekuatan geser perlekatan pada kelompok yang dietsa 30 detik tidak bermakna terhadap kelompok kontrol (p = 0,05). Kelompok yang dietsa 40 detik dan 50 detik menghasilkan kekuatan geser perlekatan lebih besar secara bermakna dibandingkan kelompok kontrol (p = 0,05). Disimpulkan bahwa lama pengetsaan dengan asam fosfat 37% berpengaruh terhadap kekuatan geser perlekatan porselen dengan resin komposit sinar-tampak, dan kekuatan geser perlekatan terbesar didapatkan pada kelompok yang dietsa selama 50 detik.

To repair porcelain tooth restoration using visible light composite resin needs bond strength. The objective of this study was to evaluate the effect of etching duration using phosphate 37% on the shear bond strength to porcelain of visible light-cured composite resin. There were twenty porcelain disks (VINTAGE metalbond Porcelain) without glazing with 10 mm in diameter and 3 mm in thicks were divided into 4 groups. Group A was not etched (control), group B was etched for 30 seconds, group C was etched for 40 seconds, group D was etched for 50 seconds. The visible light-cured composite resin (FiltekTM P60, 3M ESPE) was attached to etched-and bonding agent contains a silane (Rely XTM Ceramic Primer, 3M ESPE) applied porcelain surface, and then light polymerized for 40 seconds. The specimens were stored in 370 C of aquades for 24 hours before determination of shear bond strength. The shear bond strength was determined by means of a Pearson Panke Equipment Ltd., whith had a speed force of 0.5 mm/minute until the composite resin was break off the porcelain. The result of the research showed that the lowest average of shear bond strength was in control group (5,962 Mpa), and the highest average of shear bond strength was in the group that was etched 50 second (18,860Mpa). According to the one-way Anava Test, there was a significant different of the shear bond strengths among group A, B, C, and D (P< 0.05). The LSD Test showed that the difference of shear bond strengths among the group, which was etched 30 seconds were not significant toward the control group (P>0.05). The group, which etched in 40 seconds and 50 seconds were a significant different of shear bond strengths compared with the control group ((P< 0.05). The conclusion was that the etching duration with 37% phosphate acid affected the porcelain shear bond strength with the visible light-cured composite resin, and the highest average of shear bond strength was in the group that was etched 50 second.

Kata Kunci : Restorasi Gigi Porselen,Resin Komposit Sinar Tampak,Asam Fosfat 37 persen,etching duration, 37% phosphate acid, bonding agent contains a silane, shear bond strength