Kegiatan promosi dan preventif kesehatan sangat diperlukan untuk mengubah perilaku hidup bersih dan sehat. Upaya memaksimalkan dan memanfatkan peran dokter kecil yang dibentuk di Dusun Pendul sebagai motor penggerak untuk memengaruhi dan membiasakan perilaku hidup bersih dan sehat. Program pengabdian kemitraan masyaraklat dilakukan di Dusun Pendul, Argorejo, Sedayu, Bantul dilakukan dengan memanfaatkan dokter gigi kecil sebagai motor penggerak perilaku hidup bersih dan sehat dengan mengajari teman-temannya dan memengaruhi keluarganya. Metode yang dilakukan adalah penyuluhan melalui dokter gigi kecil dengan bahasanya sendiri, bimbingan belajar yang disertai membiasakan perilaku hidup bersih dan sehat seperti cuci tangan, bersih diri, membuang sampah, serta memasang poster-poster promosi kesehatan dan permainan lagu yang bertema kesehatan. Dalam kegiatan ini anak-anak akan didampingi oleh pendamping anak atau orang tua yang sekaligus menjadi sasaran penyuluhan kesehatan gigi serta perilaku hidup bersih dan sehat. Hasil kegiatan ini ternyata dapat memengaruhi kebiasaan hidup bersih dan sehat pada abak-anak dan pendamping anak-anak.

This study examines the composite quality of PP and HDPE plastic waste materials using Microfiber Oil palm empty fruit bunches (OPEFB) as filler, the fiber used is 90 µm. The ratio of matrix: filler used is 60:40 and 70:30 for each type of PP and HDPE polymer. The method used is a melt blending screw extruder, where plastic and fiber materials are dissolved with a compatibilizer and then melt blended in an extruder by providing temperatures of 160 and 170 oC. Tensile tests showed the strength of the PP composite with a filler ratio of 60:40 and 70:30, respectively, of 313.25 N and 336.35 N, while the HDPE composite with a filler ratio of 60:40 and 70:30, respectively are 392.93 N and 187.90 N. The maximum force required to break HDPE composites reaches 21.10 Mpa while for PP composites it reaches 18.56 Mpa. From the morphology of the PP and HDPE composite samples, the overall surface structure of HDPE looks regular with a width from 1 to 13.5 mm. The PP composite shows a uniform and regularly arranged surface structure and the bond between the fibers and the filler looks more compatible but the surface pores are rougher. Heat resistance can be seen from the melting point of PP composites which can reach 163.81oC while HDPE composites only reach 134.21oC.

No abstract

Resin composites are the most commonly used restorative materials and are constantly evolving due to their shortcomings which can affect the restoration results in polymerization shrinkage, leading to the formation of microleakage. Although incremental techniques have been found, this technique has drawbacks regarding the time required and the possibility of contamination. The invention of bulk fill resin composite can solve this problem. Manufacturers of One-Bulkfill (3M ESPE) claim that this material has less polymerization shrinkage than conventional resin composites, which is expected to have less chance of microleakage. This study aims to determine the difference in microleakage between one-bulkfill resin composites and conventional resin composites. 20 extracted premolars without caries and anomalies were utilized as research samples. These teeth were then prepared to form a class 1 cavity, then divided into two groups, namely; (1) One-Bulkfill (3M ESPE) and (2) Z350 XT (3M ESPE). These two samples were immersed in 1% Methylene Blue solution and observed using a Camera with a Macro Lens. Data were analyzed using an independent sample t-test. The results demonstrated a significant difference in microleakage between the two groups (p = 0.014, p0.05). The mean value of microleakage in One-Bukfill composite resin restorations was 0.022, while Z350 XT composite resin restorations had 0.038. It can be concluded that the One-Bulkfill composite resin restoration had a smaller microleakage value than the conventional composite resin restoration (Z350 XT).

Hybrid composite resin is a restorative material that has a filler size ranging from 0.4 to 1.0 µm which is resistant to fracture, has a colour similar to the tooth structure, and resistant to abrasion. Hybrid composite resin has the property of absorbing liquid like robusta coffee. Robusta coffee contains acids that can cause surface roughness in hybrid composite resins. The purpose of this study was to determine the effect of Robusta coffee immersion on the surface roughness of the hybrid composite resin. The research sample amounted to 27 which were printed in the form of a cylinder measuring 10 mm and a thickness of 4 mm. Each sample was immersed in distilled water for 24 h and then tested for surface roughness. Group A was immersed in robusta coffee solution for 3 days. Group B was immersed in robusta coffee solution for 5 days. Group C was immersed in robusta coffee solution for 7 days. Then, the surface roughness of the sample was measured using the Surfcorder SE 1700 brand surface roughness tool and the results were paired t-test and One Way Anova. The results of the paired t-test showed p-value = 0.000 which means that there is a significant difference between the pre-test and post-test scores. The results of the One Way Anova test showed p-value = 0.039, which means that there was a significant difference between the sample groups. There is an effect of robusta coffee immersion on the surface roughness of the composite resin.