Pengaruh pelapisan edible coating dan perendaman larutan teh hijau pada basis gigi tiruan nilon termoplastik terhadap kekasaran permukaanEffect of edible coating and green tea solution immersion on the surface roughness of thermoplastic nylon denture base

Kelompok edible coatin g dan direndam teh hijau (A), tidak dilapisi edible coating dan direndam teh hijau (B) , dan dilapisi edible coating dan direndam aquades (C). Pengukuran nilai kekasaran permukaan basis gigi tiruan nilon termoplastik menggunakan Profilometer. ABSTRACT Introduction: Surface roughness is one of the determinants of clinical resistance of denture base materials. The level of surface roughness can be prevented by applying the edible coating and green tea solution immersion. Green tea contains many catechins, which act as disinfectants and antiseptics, and can inhibit the growth of microorganisms. Edible coating functions as a barrier for mass transfer and as a carrier for food additives. This study aims to analyse the effect of edible coating and green tea solution immersion on the surface roughness of the thermoplastic nylon denture base. Methods: This research was conducted in an experimental laboratory with a sample of thermoplastic nylon square sized 20x20x3 mm (ADA no 16). As many as 27 samples were divided into three treatment groups, each totalling nine. Treatment group: coated with edible coating and soaked in green tea (A), not coated with edible coating and soaked in green tea (B), and coated with edible coating and soaked in distilled water (C). Measurement of the surface roughness value of thermoplastic nylon denture base using a Profilometer. Results: The average surface roughness value in group A was 0.020.008 m, group B was 0.040.009 m, and group C was 0.020.009 m. Based on the one-way ANOVA test, it showed a significant effect with p=0.001, and LSD showed a significant difference between groups A and B (p=0.0001), B and C (p=0.002), but there was no difference between A, B, and C (p=0.533). Conclusion: Edible coating and green tea solution immersion of thermoplastic nylon denture base can reduce surface roughness.