Efek Samping Lama Aplikasi dari Bleaching Agent Hidrogen Peroksida 40% Terhadap Kekasaran Permukaan Resin Komposit Tipe Nanofill

Bleaching is a dental treatment chemically on the vital and non vital teeth undergoing discoloration. One technique is in office bleaching. Application of bleaching agent is not only touching the healthy tooth tissue, but also potentially touched restorative nanofill dental composite resins. Materials research is resin composite nanofil (Filtek Z350, 3 m, USA) and the bleaching agent 40% hydrogen peroxide (Opalescense Boost, USA). Disc-shaped sample (diameter 10 mm, thickness 2 mm) as many as 12 samples and divided into 3 groups each sample 4. The samples applied with bleaching agent 40% hydrogen peroxide at room temperatures (25 C) and contact time: 30 minutes, 45 minutes, and 60 minutes. Surface roughness was measured before and after application of bleaching. Surface roughness was measured before and after application of bleaching. Statistical analysis using a one way ANOVA and LSD 0,05. The results showed the average delta composite resin nanofil roughness with time sequential contacts 30, 45 and 60 minutes is 0,040 0,016 µm ± 0,045 µm ± 0.025, and 0.025  ± 0.125 µm. ANOVA test showed that there is a sinificant influence of variation of long application of hydrogen peroxide 40% against a nanofill composite resin surface roughness (p< 0.05). Test LSD indicates there is a significant difference between the delta’s average surface roughness on all groups, except the group of 30 and 45 minutes. Conclusion this research is a variation time contacts of 40% hydrogen peroxide application increases the surface roughness of a composite resin nanofil

EFEK SAMPING LAMA APLIKASI DARI BLEACHING AGENT HIDROGEN PEROKSIDA 40% TERHADAP KEKASARAN PERMUKAAN RESIN KOMPOSIT TIPE NANOFIL

Bleaching is a dental treatment uses chemical on discolored vital and nonvital teeth. From many bleaching techniques, there is one name in office bleaching which performed in the dentist's office. Often, the application of bleaching agents does not only touch the healthy tooth tissue, yet it has the potential to touch the tooth tissue that has tooth restoration, for example is the nanofill composite resin. The purpose of this study is to determine the adverse effects of application time of bleaching agent 40% of hydrogen peroxide on the surface roughness of nanofill type composite resin restorations. The study was conducted by an experimental laboratory method. The sample was a nanofill composite resin sample (Filtek Z350, 3M, USA) discshaped with a diameter of 10 mm and a height of 2 mm. Samples were made with a total of 12 samples, which were divided into 3 treatment groups with each group consist of 4 samples. The samples was soaked in aquades and put into incubator for 24 hours at 37OC. The samples applied with bleaching agent 40% hydrogen peroxide (Opalescense Boost, USA) at room temperature (25OC). Each treatment group had a different variation of contact time with bleaching agent, which were: 30 minutes, 45 minutes, and 60 minutes. The surface roughness was measured before and after the application of bleaching agent. Then the data delta (�) of surface roughness were statistically analyzed using One-Way ANOVA followed by LSD0,05 significance test. Results showed the mean and standard deviation of delta (�) of the initial and final surface roughness of nanofill composite resin with 30 minutes of contact time was 0.040 ±0.016 �