Acrylic resin denture base has the properties absorbing that affecting physical and mechanical properties. One of the physical properties of acrylic resin is surface roughness. The aim of the study was to find out the roughness effect on heat cured acrylic that was immersed in alkaline peroxide and 75% celery (Apium graveoens L) extract as a disinfectant solution. The study was a true experimental and posttest with control group designed with a rectangular shape size 65 x 10 x 3.3 mm based on the ISO standard 1567, six samples were used for alkaline peroxide, celery extract 75% and aquadest group for 5 and 15 days. A Surface Roughness Tester was used for the surface roughness changes observation. The statistical test used One-way ANOVA and post hoc Bonferroni. The results of this study showed the value of roughness on 5 days for alkaline peroxide (1.51 µm) is greater than celery extract (0.36µm) and aquadest (0.30 µm). The soaking for 15 days in alkaline peroxide (1.52 µm) is greater than 75% celery extracts (0.38 µm) and aquadest (0.34 µm). Alkaline peroxide caused higher roughness value of heat cured acrylic resin than 75% celery extract.

<p>Acrylic resin denture base has the properties absorbing that affecting physical and mechanical properties. One of the physical properties of acrylic resin is surface roughness. The aim of the study was to find out the roughness effect on heat cured acrylic that was immersed in alkaline peroxide and 75% celery (<em>Apium graveoens L</em>)<em> </em>extract as a disinfectant solution. The study was a true experimental and posttest with control group designed with a rectangular shape size 65 x 10 x 3.3 mm based on the ISO standard 1567, six samples were used for alkaline peroxide, celery extract 75% and <em>aquades</em><em>t</em> group for 5 and 15 days. A Surface Roughness Tester was used for the surface roughness changes observation. The statistical test used One-way ANOVA and post hoc Bonferroni. The results of this study showed the value of roughness on 5 days for alkaline peroxide (1.51 µm) is greater than celery extract (0.36µm) and <em>aquades</em><em>t</em> (0.30 µm). The soaking for 15 days in alkaline peroxide (1.52 µm) is greater than 75% celery extracts (0.38 µm) and <em>aquadest </em>(0.34 µm). Alkaline peroxide caused higher roughness value of heat cured acrylic resin than 75% celery extract.</p>

Background: Bioactive resin can release calcium ions when contact with solution media, even in acid condition. In the oral cavity, pH may change into acid condition due to the metabolic results of Streptococcus mutans. The bacteria metabolize carbohydrates into organic acids, one of which is lactic acid. Purpose: Analyze the effect of lactic acid solution and artificial saliva on the number of the release of calcium ions of bioactive resin. Methods: Forty-two specimens (diameter 15 mm x thickness 1 mm; n= 7/group fabricated with Activa™ Bioactive Restorative (Pulpdent). The specimens that meet the criteria were divided into 6 groups. The specimen was immersed for 1 and 7 days in the incubator at 37oC. The number of calcium ion release is measured using titration method. Results: Two Way Anova test and Post Hoc Bonferonni test showed there were significant differences among all group for lactic acid 1 day (4.040 ± 0.360) µg, artificial saliva 1 day (0.640 ± 0.338) µg, distilled water 1 day (1.040 ± 0.504) µg, lactic acid 7 days (5.400 ± 0.312), artificial saliva 7 days (1.640 ± 0.215) µg, distilled water 7 days (3.520± 0.356 µg). Conclusion: There was an influence of lactic acid and artificial saliva on the number of calcium ion releases of bioactive resin. Immersion of bioactive resin in the lactic acid solution increase the calcium ion releases and artificial saliva decrease the calcium ion release compared to distilled water. Keywords: artificial saliva, bioactive resin, calcium ion release, lactic acid

Objectives: This study aimed to determine the value of dentocraniofacial measurements of FKG ULM students from Banjar ethnic in terms of lateral cephalometric radiography using Steiner analysis. Materials and Methods: Cephalometric measurements were performed using the Steiner analysis method on skeletal landmarks: SNA, SNB and ANB; dental: UI-NA, LI-NB, and interincisal angle. Data analysis was performed by descriptive statistical method. Results: The average skeletal and dental value of the FKG ULM students from Banjar ethnic at the SNA angle is 86.31°± 4.49°, the SNB is 81.33°± 4.39°, the ANB is 4.98°± 2.05°, the UI-NA angle is 19.69°± 8.22°, the LI-NB angle is 28.65°± 6.76°, the UI-NA distance is 4.45± 2.86 mm, the LI-NB distance is 8.58± 3.19 mm and the interincisal angle is 126.43°± 10.51°. Conclusion: The dental and skeletal averages showed that the FKG ULM students from Banjar ethnic had more prognathic maxillary and mandibular positions and more protrusive maxillary and mandibular incisor positions than the normal standard of Steiner's analysis.

Bioactive composite resin is the newest restorative resin material which has good mechanical and aesthetic properties. In the oral cavity, the restoration is degraded due to exposure to acids, one of which is exposure to asthma drugs. Properties of composite resins that can be affected by degradation include surface roughness. This study aims to analyze salbutamol sulfate exposure to the surface roughness of bioactive resins. The research method used was pure experimental design with post test-only with control design. The study used 39 specimens of bioactive resin (8 mm in diameter and 2 mm in thickness), divided into 3 treatment groups, namely the 400µg salbutamol sulfate exposure group, the 800µg salbutamol sulfate exposure group and the artificial saliva control group with treatment every 24 hours for 7 days, subsequently the specimens are tested with the surface roughness of the composite resin using a surface roughness tester. The highest surface roughness value was found in the 800µg group (8.23 ± 0.98 µm), followed by 400 µg group (5.43 ± 1.16 µm) and the lowest in the artificial saliva group (2.63 ± 0.82 µm). There were significant differences in all treatment groups. The exposure of salbutamol sulfate affects the surface roughness of the bioactive composite resin, a higher number of exposure doses indicates a higher surface roughness value.Keywords: bioactive composite resins, salbutamol sulfate, surface roughness