ABSTRAKTujuan: Mengetahui pengaruh gel ekstrak belimbing wuluh terhadap perubahanwarna email gigi. Metode: 30 spesimen gigi sapi dibagi menjadi 6 kelompok, yaitukelompok aplikasi gel ekstrak belimbing wuluh Aceh 70% , 80%, dan 90%, sertaekstrak belimbing wuluh Bogor 70%, 80%, dan 90%. Aplikasi gel dilakukan selama4 jam per hari dalam 14 hari aplikasi. Pengukuran nilai warna dilakukan awal,setelah 7 hari, dan 14 hari aplikasi menggunakan VITA Easyshade® denganperhitungan perubahan warna didapat melalui rumus CIEL*a*b. Hasil: Dari uji tberpasangan, didapatkan terjadi perubahan warna yang bermakna setelah 7 hari dan14 hari aplikasi gel ekstrak belimbing wuluh Aceh dan Bogor konsentrasi 70% dan80%. Kesimpulan: Peningkatan perubahan warna menyebabkan diskolorasipermukaan email setelah aplikasi gel ekstrak belimbing wuluh.

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ABSTRACTObjectives: To investigate the effect of gel containing small starfruit extracts to thecolour change of tooth enamel. Methods: 30 specimens of bovine teeth were dividedinto 6 groups which would be applied with gels with different concentration (withAceh?s small starfruit extracts 70%, 80%, 90%, and Bogor?s small starfruit extracts70%, 80%, 90%). Gel application was done 4 hours per day in 14 days. Themeasurement of the colour change performed before application, 7 days, and 14 daysof application using VITA Easyshade® with calculation of the colour change wasobtained through CIEL*a*b* formula. Results: From dependent t-test, there was asignificant color change after 7 days and 14 days application of gel containing 70%and 80% small starfruit extracts. Conclusion: Increased color changes causesdiscoloration of enamel surface after application of gel starfruit extracts.