Hasil Pencarian  ::  Simpan CSV :: Kembali

"Aluminum matrix composite (AMC) menjadi material yang sangat potensial bagi aplikasi industri ketika terdapat kebutuhan untuk mendapatkan kombinasi sifat ringan dengan sifat lainnya yang menunjang seperti kekuatan, kekakuan, ketahanan aus, konduktivitas listrik dan termal tinggi, dan koefisien ekspansi termal rendah. Namun material AMC sangat rentan terkena korosi pitting dan galvanik, yang disebabkan oleh pembentukan pasangan galvanik antara matriks dan penguat, serta terbentuknya mikrostruktur pada interface penguat/matrix. Anodisasi merupakan proses modifikasi permukaan yang potensial untuk meningkatkan ketahanan korosi AMC dengan menghasilkan lapisan oksida berpori. Namun, adanya penguat dalam AMC menghalangi pembentukan lapisan oksida protektif dengan mendorong terbentuknya cavity dan retak mikro. Oleh karena itu, metode cerium sealing digunakan untuk memperbaiki cacat pada lapisan oksida hasil anodisasi, sehingga dapat meningkatkan ketahanan korosi pada lingkungan yang sangat agresif.Penelitian ini bertujuan untuk menganalisis pengaruh parameter proses yakni temperatur dan rapat arus anodisasi terhadap pembentukan lapisan anodik berpori. Anodisasi dilakukan pada tiga temperatur yakni 25°C,0°C dan -25°C dengan variasi rapat arus 25,20 dan 15 mA/cm2. Pengujian kekerasan mikro Vickers digunakan untuk mengetahui sifat mekanik lapisan anodik. Pengamatan struktur mikro menggunakan FE-SEM untuk mengetahui morfologi permukaan dan mengukur ketebalan lapisan anodik.Hasil pengujian menunjukkan penurunan temperatur dan rapat arus akan meningkatkan kekerasan permukaan lapisan anodik alumina dimana kekerasan tertinggi adalah 427 HV yang didapat pada temperatur -25°C dengan rapat arus 15mA/cm2. Penurunan temperatur dan rapat arus juga relatif akan meningkatkan kerapatan dan keseragaman permukaan hasil anodisasi. Serta penurunan temperatur hingga 0°C akan meningkatkan ketebalan lapisan oksida dimana ketebalan terbesar adalah 14,13 μm yang yang didapat pada temperatur 0°C dengan rapat arus 25mA/cm2. Namun ketebalan kembali menurun pada saat diturunkan ke temperatur -25°C.

---

Aluminum matrix composites (AMC) become potential materials for transport application where there is an obvious need for combination of weight saving and other properties, i.e. high specific strength, high specific stiffness, electrical and thermal conductivities, low coefficient of thermal expansion and wear resistance. However they are generally susceptible to corrosion in various environments, due to galvanic reactions between the reinforcements and the matrix, and selective corrosion on the interface due to the formation of new compounds. Anodizing has been considered as a potential modification treatment for enhancing corrosion resistant of AMC by forming porous anodic oxide on the surface area.

This study aims to analyze the influence of anodizing process parameters which is temperature and current density on the formation of porous anodic coating, Anodizing process has been done at three different temperatures which are 25°C,0°C and -25°C with variation of current density at 25,20 and 15 mA/cm2. Vickers microhardness testing was used to determine the mechanical properties of anodic layer. Observation of microstructure using FE-SEM to determine surface morphology and to measure anodic layer thickness.

Test results showed that decreasing temperature and current density would increase surface hardness of aluminium anodic layer. The highest surface hardness was 427 HV which was got by anodizing at temperature -25°C with using 15 mA/cm2 of current density. Decreasing temperature and current density would also relatively increasing density and make the surface smoother and looks more uniform. Decreasing temperature until 0°C would increase thickness of the oxide layer where the highest thickness was 14,13 μm which was got by anodizing at temperature 0°C with using 25 mA/cm2 of current density. But the thickness would decrease when the temperature was decreased to -25°C."

"Proses fabrikasi Pertamina PHE ONWJ membutuhkan proses fabrikasi yang selesai tepat waktu. Salah satu tahap fabrikasi adalah proses pengecatan baja karbon agar terhindar dari peristiwa korosi. Penelitian ini menggunakan dua produk cat yang berbeda yaitu produk X (lama) dan produk Y (baru). Produk Y memiliki waktu pengeringan cat yang lebih cepat dibandingan produk X. Proses preparasi permukaan dilakukan dengan tingkat kebersihan Sa 2,5 dan Sa 3 pada temperatur ambient saat mengaplikasikan cat. Tingkat ketahanan korosi diketahui dengan pengujian kabut garam. Kekuatan daya lekat diketahui dengan pengujian adesi. Cacat poros diketahui dengan pengujian holiday. Mikrostruktur lapisan cat dilihat dengan pengujian metalografi. Hasil pengujian kabut garam pada metode scratch dan unscratch didapatkan kedua jenis cat memiliki ketahanan korosi yang sama. Hasil pengujian adesi didapatkan kekuatan adesi produk Y lebih besar dibandingkan produk X. Hasil pengujian metalografi menunjukan adanya poros pada lapisan primer produk X. Waktu fabrikasi produk Y lebih cepat dibandingkan produk X.

---

Fabrication process on Pertamina PHE ONWJ needs fabrication process that finish at the right time. One of fabrication process is painting carbon steel to protect them from corrosion. This research use two paint product, product X (the old product) and product Y (the new product). Product Y has faster fabrication time than product X. This research use surface preparation with cleanliness level Sa 25, and Sa 3 at ambient temperature when painting application. The level of corrosion resistance is known by salt spray test. Paint adhesion is known by adhesion test. Porosity is known by holiday test. Microstructure of paint layer is known by metallography test. The result of salt spray test with scratch and unscratch method is the two products have same corrosion resistance. The result of adhesion test is product Y has higher adhesion than product X. The result of metallography is product X has porous at primer layer. Fabrication time of product Y is faster than product X."

"Latar belakang: Early Childhood Caries (ECC) terjadi apabila terdapat satu atau lebih gigi karies, gigi yang hilang akibat karies atau gigi yang telah ditambal pada anak usia dibawah 71 bulan. Salah satu faktor risiko dari ECC adalah mikroorganisme, yaitu Streptococcus mutans yang merupakan bakteri patogen utama dari karies. Salah satu tindakan pencegahan ECC yang efektif adalah menyikat gigi dengan pasta gigi berfluoride, namun penggunaan fluoride dengan dosis tinggi dapat menyebabkan fluorosis. Berdasarkan hal tersebut, telah dilakukan penelitian untuk menemukan pasta gigi berbahan natural. Telah terbukti bahwa Virgin Coconut Oil (VCO) adalah bahan natural yang memiliki efek antimikroba. Metode Penelitian: Penelitian ini menguji VCO pasta gigi 8% dan 80% terhadap viabilitas biofilm S. mutans dari pasien ECC. Nilai viabilitas biofilm didapatkan dengan melihat perbedaan nilai optical density (OD) biofilm S. mutans sebelum dan sesudah diberi bahan uji VCO pasta gigi. Hasil: Analisis data menggunakan uji independen t-Test menunjukkan nilai viabilitas biofilm S. mutans VCO pasta gigi 8% terhadap kontrol negatif berbeda tidak signifikan, namun VCO pasta gigi 80% terhadap kontrol negatif berbeda signifikan. Kesimpulan: Pada penelitian ini, terdapat kenaikan nilai OD biofilm S. mutans setelah pemberian VCO pasta gigi 8%. Sebaliknya, terdapat penurunan nilai OD biofilm S. mutans setelah pemberian VCO pasta gigi 80%. Berdsarkan hal tersebut dapat disimpulkan bahwa VCO pasta gigi konsentrasi 80% memiliki efek antibakteri terhadap viabilitas biofilm S. mutans secara in vitro.

---

Background: Early Childhood Caries (ECC) is defined as one or more decayed, missing (due to caries), or filled tooth surfaces in children aged 71 months or younger. Microorganism is one of ECCs risk factor with Streptococcus mutans being the main pathogen of caries. ECC can be prevented effectively using fluoridated toothpaste, but too much fluoride exposure can cause dental fluorosis in children. Studies had been done to create toothpaste with natural active ingredient. One of natural products that has been proven to have antimicrobial activity is Virgin Coconut Oil (VCO). Methods: In this study, VCO toothpaste 8 and 80% concentration was tested against S. mutans biofilm viability. Biofilm viability was measured using the difference between optical density (OD) score before and after VCO toothpastes exposure. Results: The data was analyzed using independent t-Test. S. mutans biofilm viability in VCO toothpaste 8% concentration unsignificantly different from negative control. Meanwhile, VCO toothpaste 80% concentration was significantly different from negative control. Conclusion: In this study, S. mutans biofilm that was exposed with VCO toothpaste 8% concentration showed an increase in the OD score. On the contrary, there was a decrease in the OD score of S. mutans biofilm after being exposed with VCO toothpaste 80% concentration. From the results above, it can be concluded that VCO toothpaste 80% concentration exhibits antibacterial effect against S. mutans biofilm viability in vitro"

"Latar Belakang: Penelitian tentang pertumbuhan dan perkembangan gigi M1 bawah pada ras Deutromalayid berdasarkan usia kronologis, jenis kelamin, dan status gizi masih terbatas. Tujuan: Mengetahui frekuensi distribusi tahap pertumbuhan dan perkembangan gigi M1 bawah pada ras Deutromalayid di Indonesia berdasarkan usia kronologis, jenis kelamin, dan status gizi. Metode: Jenis penelitian adalah deskriptif dengan desain potong lintang menggunakan sampel 122 data rekam medik pasien anak laki-laki dan perempuan Klinik Integrsi Anak FKG UI dengan perbandingan yang sama berusia 5-11. Hasil: Penilaian tahap pertumbuhan dan perkembangan gigi M1 bawah dengan reproduksi digital memiliki reproduksibilitas yang baik. Tidak ada perbedaan tahap pertumbuhan dan perkembangan gigi M1 bawah sisi kiri dan kanan. Pertumbuhan dan perkembangan gigi M1 bawah terjadi dengan bertambahnya usia. Pertumbuhan dan perkembangan gigi M1 bawah berbeda terhadap jenis kelamin, yaitu anak perempuan lebih awal, kecuali pada kelompok usia 6, 10, dan 11. Status gizi yang berbeda tidak menunjukkan perbedaan pertumbuhan dan perkembangan gigi M1 bawah, kecuali pada kelompok usia 5 dan 8. Kesimpulan: Subjek penelitian dapat mewakilkan ras Deutromalayid di Indonesia. Perbedaan usia dan jenis kelamin menunjukkan perbedaan proporsi tahap pertumbuhan dan perkembangan gigi M1 bawah, sedangkan status gizi tidak.

---

Background: Researches on growth and develompent of mandibular first permanent molars based on chronological age, sex, and nutritional status are limited in Deutromalayid race group.

Objectives: To know the frequency distribution of growth and development stages of mandibular first permanent molars in the Deutromalayid race group based on chronological age, sex, and nutritional status. 

Method: This is a cross-sectional descriptive study with 122 medical records of patients of Pedodontics Integrated Clinic, Faculty of Dentistry, Universitas Indonesia with the same ratio of both sexes aged 5-11 as samples.

Result: Assessment of growth and development stages with reproduced digital panoramics has a good reproducibility. Theres no difference of growth and development stages on left and right side. The growth and development undergo with the increase of individuals age. The growth and development differs on sex, that girls undergo earlier, except on age groups of 6, 10, and 11. Difference of nutritional status doesnt show difference of the growth and development, except on age groups of 5 and 8.

Conclusion: Subjects of research can represent the Deutromalayid race in Indonesia. Differences of age and sex show differences in growth and development of mandibular first permanent molars, while difference of nutritional status doesnt."

"Karbohidrat merupakan sumber energi terpenting yang dibutuhkan pada masa pertumbuhan anak. Karbohidrat merupakan faktor terpenting pada proses terjadinya karies. Prevalensi karies di Indonesia untuk kelompok usia 5 – 9 tahun berdasarkan RISKESDAS 2018 sebesar 92,6%. Kerentanan gigi untuk terkena karies mencapai titik maksimum setelah 2 – 3 tahun pasca erupsi. Gigi Molar permanen pertama dapat menggambarkan kondisi keparahan karies dalam rongga mulut sebagai gigi permanen yang tumbuh pertama kali. Tujuan: Menganalisis hubungan jenis dan frekuensi konsumsi karbohidrat terhadap karies gigi Molar satu permanen pada anak usia 8 – 9 tahun. Metode: Desain studi cross sectional. Subjek penelitian berjumlah 109 anak yang dipilih menggunakan purposive sampling. Variabel yang digunakan bertujuan untuk menganalisis hubungan antara frekuensi konsumsi karbohidrat dan kudapan dengan karies gigi Molar satu permanen. Food Frequency Questionnaire (FFQ) digunakan untuk mengukur frekuensi konsumsi karbohidrat dan pemeriksaan klinis karies gigi Molar satu permanen menggunakan ICDAS. Kesimpulan: terdapat hubungan tidak bermakna antara frekuensi konsumsi karbohidrat makanan utama dan karbohidrat kudapan terhadap karies gigi Molar satu permanen anak usia 8- 9 tahun

---

Carbohydrates are the most important source of energy needed during a child's growth. Carbohydrates are the most important factor in the process of caries. The prevalence of caries in Indonesia for the 5-9 years age group based on RISKESDAS 2018 is 92.6%. Tooth susceptibility to caries reaches its maximum point after 2 to 3 years after eruption. The first permanent Molars can describe the condition of the severity of caries in the oral cavity as a permanent tooth that grows first. Aim: To analyse the relationship between type and frequency of carbohydrate consumption against caries of permanent first Molar teeth in children aged 8 – 9 years. Method: Cross sectional study design. There were 109 study subjects, selected using purposive sampling. The variable used aims to analyse the relationship between the frequency of carbohydrate consumption and snacks with dental caries for permanent first Molar. food frequency questionnaire (FFQ) used to measure the frequency of carbohydrate consumption and clinical examination of dental permanent first Molar teeth using ICDAS. Conclusion: there is no significant relationship between the frequency of carbohydrate as main course consumption and carbohydrate as snacks on dental caries in permanent first Molar children aged 8- 9 years"

"Background: Protein is one of the nutrients that teeth need during growth, maturation and, after eruption. Protein consists of plantprotein and animal protein. Plantprotein has the highest average percentage of daily protein consumption inIndonesia.Plantprotein is found in nuts, tofu, and tempeh. The content of food sources of plantprotein has many benefits that are good for oral health.At the age of 8-9 years permanent first molar teeth have erupted they can experience caries within 1-2 years after eruption because of their morphological and functional characteristics. In children, dental caries is one of the most frequent chronic infectious diseases occur and have close links with nutrition.While snacks may also contribute to oral health problems.Aim: To determine the relationship between the level of consumption of plant protein and cariogenic food with the occurrence of permanent dental first molar teeth in children aged 8-9 years in Central Jakarta. Methods: This study isa cross-sectional observational analytic study. The subjects of the study were 109 children aged 8-9 years who were studying State Primary School in Central Jakarta. Teeth examined for permanent first molar teeth that have been erupted. The measuring instrument used was a questionnaire and caries assessment using classification (ICDAS). Result:.The results of the study showed the frequency distribution of caries as follows; 1.8% caries free, 63.3% enamel caries, and 34.9% dentin-pulp caries. Meanwhile, consumption of vegetable protein with caries depth and consumption of snack foods with depth of caries both showed very weak correlation results (r = 0.00-0.199) and there was no statistically significant difference (P> 0.05).Conclusion: There is a very weak correlation between consumption of vegetable protein and snack food with the depth of caries in permanent first molars in children aged 8-9 years in Central Jakarta, and there is no statistically significant difference"

"ABSTRAKLatar Belakang: Saat ini, masih banyak ibu yang belum melakukanperawatan pada gigi anaknya yang mengalami trauma gigi. Penelitiansebelumnya menyatakan bahwa kondisi sosiodemografi ibu (pendapatan,jarak tempat tinggal-fasilitas kesehatan, orang yang berpengaruh)mempengaruhi keputusan ibu dalam perawatan kesehatan anak. Tujuan:Untuk mengetahui hubungan antara status sosiodemografi ibu dan keputusanperawatan pada kasus trauma gigi anterior anak. Metode: Studi analitikpotong lintang. Subjek penelitian sebanyak 50 ibu dari anak yang mengalamitrauma gigi permanen anterior usia 8-12 tahun di sekolah dasar negeri diJohar Baru, Jakarta Pusat. Hasil: Terdapat hubungan antara aspeksosiodemografi pendapatan, jarak rumah dan orang yang mempengaruhi ibudengan keputusan perawatan trauma pada gigi permanen anterior anak(p<0,05).

---

ABSTRACTBackground: Nowadays, most mothers have not seek the treatment onchildren’s traumatized permanent anterior teeth. Previous research stated thatmothers’ sociodemographic conditions (income, home-health facilitydistance, influencing person) affect mothers’ decision of children health care.Aim: Determine the relationship between mothers’ sociodemographic statusand treatment decisions on children’s traumatized permanent anterior teeth.Method: Cross-sectional analytic study. Research subjects were 50 mothersof children aged 8-12 years old with traumatized permanent anterior teeth inpublic elementary school at Johar Baru, Central Jakarta. Result: There is arelationship between sociodemographic aspects of income, home-healthfacility distance, and influencing person with trauma care decisions onpermanent anterior teeth of children (p<0.05)."

"ABSTRAKTujuan: mengetahui perbedaan video animasi dan non-animasi dalam meningkatkanketerampilan menyikat gigi anak tunagrahita ringan. Metode: studi eksperimentaldengan mengedukasi 30 anak tunagrahita usia 6-18 tahun menggunakan videoselama 21 hari dan pemeriksaan oleh peneliti setiap minggu. Hasil: setelah 3 mingguterjadi peningkatan (68,75% dan 50%) keterampilan menyikat gigi, penurunan skorindeks plak (68,75% dan 50%) dan kematangan plak (62,5% dan 35,71%) bermaknapada kelompok intervensi A dan intervensi B. Kesimpulan: tidak ada perbedaanantara efektivitas video animasi dan non-animasi dalam meningkatkan keterampilanmenyikat gigi anak tunagrahita. Video efektif meningkatkan keterampilan menyikatgigi anak tunagrahita dengan adanya penurunan plak bermakna.

---

ABSTRACTAim: to know differences between animated and non-animated video in improvingtoothbrushing skill of children with intellectual disability. Method: experimentalstudy by educate 30 children aged 6-18 with intellectual disability using video for 21days and reasearcher evaluating every week. Result: there’s significant improvement(68,75% and 50%) of toothbrushing skill, reduction of plaque index (68,75% and50%) and plaque maturity score (62,5% and 35,71%) in intervention A and B groupafter 3 weeks. Conclusion: no significant differences between animated and nonanimatedvideo’s effectiveness in improving their toothbrushing skills.Video iseffective to improve toothbrushing skill on children with intellectual disability bydecreasing plaque score."

"ABSTRAKTujuan: Mengetahui perbedaan penggunaan video animasi dan video nonanimasi sebagai media pendidikan dalam meningkatkan pengetahuan anak tunagrahita ringan mengenai kesehatan gigi dan mulutnya. Metode: Subjek penelitian adalah 20 siswa SDLB Ar-Rahman diberikan edukasi menggunakan video animasi dan 14 siswa SDLB Mahardika menggunakan video non-animasi. Penelitian ini menggunakan pre and post test design. Hasil: Ada perbedaan bermakna antara peningkatan pengetahuan sebelum dan sesudah edukasi (p=0.000). Namun, tidak ada perbedaan yang bermakna antara peningkatan pengetahuan menggunakan video animasi dengan menggunakan video nonanimasi (p=0.457). Kesimpulan: Video animasi dan non-animasi tidak memiliki perbedaan dalam meningkatkan pengetahuan kesehatan gigi dan mulut pada anaktunagrahita ringan.

---

ABSTRACTObjective: To determine the differences between animated and non-animated video as a medium of education in improving the knowledge of mild mental retardation children about their oral health. Methods: The subjects were 20 students of SLB Ar-Rahman, who were given education using animated video and 14 students of SLB Mahardika who were given education using non-animated video. This study used a pre and post test design. Results: There are significant differences in improvement of knowledge between before and after education (p=0.000). However, there are no significant difference between the increase in knowledge using animated viedo and using non-animated videos (p=0457).Conclusion: animated and non-animated video does not have a difference in improving the oral health knowledge on mild mental retardation children."

"Modelling dan Tell-Show-Do termasuk dalam metode tata laksana perilaku kecemasan dental anak. Video efektif digunakan dalam bidang kesehatan. Penelitian bertujuan mengetahui perbedaan tingkat kecemasan sebelum dan setelah penayangan video restorasi gigi anak yang diujikan pada usia 10-11 tahun. Responden berjumlah 66 anak dengan pengukuran tingkat kecemasan menggunakan Facial Image Scale modifikasi. Penelitian terdiri dari uji kualitatif terhadap kuisioner dan video dan uji kuantitatif terhadap tingkat kecemasan anak. Analisis statistik menggunakan uji Wilcoxon dengan batas kemaknaan 0,05. Hasil penelitian menunjukkan terdapat perbedaan bermakna tingkat kecemasan sebelum dan setelah penayangan video restorasi gigi anak. Video tidak menimbulkan tingkat kecemasan yang lebih buruk.

---

Modelling and Tell Show Do are included as child dental anxiety management. Video is effective to be used in health field. The purpose of this study was to determine the difference of anxiety level before and after video viewing for children aged 10 11 years. The study was divided into qualitative test for validating Modified FIS and video, and quantitative test for anxiety level on 66 children. Statistical analysis was using Wilcoxon test with significance level of 0.05. The results showed significant difference between anxiety level before and after child dental restoration video viewing. The video does not cause worse anxiety level. "