ABSTRAK
Latar Belakang: Gel APF yang bersifat asam dapat meningkatkan kekasaranpermukaan bahan restorasi, yang menyebabkan adhesi bakteri dan karies sekunder.Tujuan: Menganalisis pengaruh aplikasi gel APF terhadap kekasaran permukaanresin sealant. Metode: Tiga puluh enam spesimen resin sealant dibagi secara acakke dalam enam kelompok, yaitu aplikasi gel APF dan akuades selama tiga puluhmenit sebanyak satu, dua dan tiga kali. Nilai kekasaran permukaan rerata diukurdengan surface roughness tester Mitutoyo SJ201. Hasil: Kekasaran permukaanmeningkat bermakna setelah satu kali aplikasi, dan menurun bermakna setelah duakali aplikasi. (p<0,05)Kesimpulan: Gel APF menurunkan kekasaran permukaanresin sealant setelah dua kali aplikasi.

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ABSTRACT
Background: Acidity of APF gel could increase restorative material surfaceroughness, leading to increased bacterial adhesion and secondary caries. Aim: Toanalyze the effect of APF gel application on the surface roughness of resin sealant.Method: Thirty six resin sealant specimens were randomly divided into six groups,APF gel and aquadest one, two and three times application for thirty minutes each.Mean roughness was measured by Mitutoyo SJ201 surface roughness tester. Result:Surface roughness was significantly increased after one time gel application, anddecreased significantly after twice gel application. (p<0,05)Conclusion: APF geldecreased resin sealant surface roughness after second application.