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Effect of Copper (II) Chloride Concentration towards Copper Ions Sorption on Natural Zeolite from Wonosari Irnawati, Dyah; Widjijono, Widjijono; Wijaya, Karna; Asmara, Widya
The Indonesian Journal of Dental Research Proceeding Book
Publisher : The Indonesian Journal of Dental Research

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Copper-containing zeolite has been developed as an antibacterial material. It is obtained by reacting zeolite and salt solution with varied concentration of copper. Natural zeolite is abundant in Wonosari, Yogyakarta. The aim of this research was to investigate the concentration effect of copper (II) chloride solutions towards copper ions sorption on natural zeolite from Wonosari. Copper (II) chloride dihydrate powders, CuCl2. 2H2O, (Merck, Germany) and natural zeolite (Wonosari, Indonesia) were used. Zeolite powder (100 mesh) was washed and dried (200oC/2 hours). Copper (II) chloride solution with different concentrations (0.05 M, 0.10 M, 0.15 M, 0.20 M, and 0.25 M) were prepared. Zeolite and CuCl2 solutions (50 g/250 ml) were reacted at 60oC for 1 hour (n=5). The solutions were filtered, washed, and dried (100oC/24 hours). Copper ions amount were measured by XRF (Canberra Inc., USA). The data were analyzed by one way Anova. Mean values (% weight) of copper ions amount were 0.441 Â± 0.029 % (0.05 M group), 0.588 Â± 0.027 % (0.10 M group), 0.657 Â± 0.014 % (0.15 M group), 0.676 Â± 0.037 % (0.20 M group), and 0.737 Â± 0.039 % (0.25 M group). The Anova showed that CuCl2 concentration influenced copper ions amount significantly (p<0.01). The differences among the groups were significant, except between 0.15 M and 0.20 M groups (p>0.05). Copper (II) chloride concentration influenced the copper ions sorption on natural zeolite from Wonosari. The 0.25M CuCl2 solution gave the highest copper ions amount.

Pengaruh Kombinasi Posisi Fiber Terhadap Kekuatan Fleksural dan Ketangguhan Retak Fiber Reinforced Composite Polyethylene Widyapramana, Widyapramana; Widjijono, Widjijono; Sunarintyas, S.
Insisiva Dental Journal Vol 2, No 2 (2013)
Publisher : Insisiva Dental Journal

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Kehilangan gigi akibat karies, trauma, kondisi sistemik dan penyakit periodontal, dapat menyebabkan gangguanÂ fungsional terutama pada saat digunakan untuk pengunyahan. Restorasi gigi tiruan cekat (GTC) secara directÂ yang menggunakan material komposit dengan penguatan fiber sering disebut sebagai fiber reinforced compositeÂ (FRC). UHMWPE merupakan non-impregnated polyethylene fiber yang mempunyai kekuatan fleksural lebihÂ baik dari Pre-impregnated glass fiber. Penelitian ini bertujuan untuk mengetahui pengaruh kombinasi posisifiber terhadap kekuatan fleksural dan ketangguhan retak (fracture toughness) FRC UHMWPE. Penelitian iniÂ merupakan jenis penelitian eksperimental laboratoris. Bahan penelitian menggunakan fiber PolyethyleneÂ (Construct, Kerr, USA) lebar 2mm, resin komposit flowable (Filtek Z350 XT 3M ESPE, USA), silane (RelyXÂ 3M ESPETMSil, Germany). Sampel dalam penelitian ini adalah batang polyethylene fiber reinforced compositeÂ (FRC) dengan ukuran 2 x 2 x 25 mm terbagi dalam 3 kelompok kombinasi posisi fiber. Kelompok pertamaÂ adalah kombinasi posisi compression â neutral, kelompok kedua posisi neutral â tension dan kelompok ketigaÂ posisi compression â tension dengan jumlah total sampel adalah 18. Sampel FRC diuji dengan menggunakanÂ universal testing machine untuk mengetahui kekuatan fleksural (Mpa) dan ketangguhan retak/fracture toughnessÂ (MPa-m1/2). Perbedaan pengaruh diukur menggunakan analisis data Anova 1 jalur dan LSD (p<0,05). Hasil ujiÂ statistik pada sampel FRC menunjukkan terdapat pengaruh perbedaan yang bermakna pada semua sampel yangdiuji p=0,00. Sampel batang polyethylene fiber reinforced composite (FRC) dengan kombinasi posisiÂ compression â tension memiliki kekuatan fleksural 189 MPa dan ketangguhan retak 91,08 MPa-m1/2 tertinggiÂ dibandingkan dengan kelompok sampel yang lainnya. Terdapat pengaruh perbedaan kombinasi posisi fiberÂ polyethylene pada sampel FRC UHMWPE terhadap kekuatan fleksural dan ketangguhan retak (fractureÂ toughness). Berdasarkan hasil uji sampel tersebut dapat dikatakan bahwa kombinasi posisi fiber compressiontension pada aplikasi gigi tiruan cekat (GTC) dapat memberikan kekuatan fleksural 189 Mpa yang optimal danÂ mendekati rerata tekanan pengunyahan sebesar 193 Mpa.

Pengaruh Penambahan Polyethylene Fiber Dan Serat Sisal Terhadap Kekuatan Fleksural Dan Impak Base Plate Komposit Resin Akrilik Hadianto, Eko; Widjijono, Widjijono; Herliansya, M.K.
Insisiva Dental Journal Vol 2, No 2 (2013)
Publisher : Insisiva Dental Journal

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Resin Akrilik Menjadi Pilihan Untuk Pembuatan Gigi Tiruan Lepasan Karena Harganya Relatif Murah, MudahÂ Direparasi Dan Proses Pembuatan Mudah. Kelemahan Resin Akrilik Adalah Terbatasnya Terhadap KekuatanÂ Fleksural Dan Impak. Tujuan Dari Penelitian Ini Adalah Untuk Mengetahui Pengaruh Penambahan PolyethyleneÂ FiÂ ber Dan Serat Sisal Dengan Konsentrasi 1,6% Berat Terhadap Kekuatan Fleksural Dan Impak Basis Gigi TiruÂ an Resin Akrilik. Penelitian Ini Menggunakan Resin Akrilik Kuring Panas Merek Qc 20 Dengan UkuranÂ 65x10x2,5 Mm Untuk Uji Fleksural Dan 65x10x8 Mm Untuk Uji Impak. Sampel Penelitian Masing-MasingÂ Terbagi Menjadi 3 Kelompok, Setiap Kelompok Terdiri Dari 4 Subyek. Kelompok I Tanpa Penambahan Fiber,Â Kelompok Ii Dengan Penambahan Polyethylene Fiber, Kelompok Iii Dengan Penambahan Serat Sisal. SeluruhÂ Plat Resin Akrilik Direndam Di Dalam Air Destilasi Selama 24 Jam Pada Suhu 370c. Pengujian Kekuatan Fleksural Menggunakan Universal Testing Machine Dan Pengujian Kekuatan Impak Menggunakan Metode Charpy.Â Analisis Data Menggunakan One Way Anova Dengan Tingkat Kepercayaan 95% (Î=0,05) Dan Analisis Lsd.Â Hasil Penelitian Menunjukkan Rerata Kekuatan Fleksural (Mpa) Tanpa Penambahan Fiber (109,79Â±5,93);Penambahan Polyethylene Fiber (134,18 Â±3,80); Serat Sisal (170,15Â±5,50). Pada Kekuatan Impak (Kj/M2)Â Tanpa Penambahan (4,45Â±1,95) Penambahan Polyethylene Fiber (60,79Â±26,49); Penambahan Serat SisalÂ (16,23Â±3,02). Hasil Analisis One Way Anova Menunjukkan Pengaruh Bermakna Akibat Penembahan Fiber Terhadap Kekuatan Fleksural Dan Impak Base Plate Resin Akrilik (P<0,05). Analisis Lsd Menunjukkan PerbedaanÂ Bermakna Rerata Kekuatan Fleksural Antar Kelompok (P<0,05). Pada Hasil Uji Impak Menunjukkan BahwaÂ Rerata Kelompok Tanpa Fiber Berbeda Bermakna Dengan Kelompok Dengan Penambahan Fiber (P<0,05), DanÂ Antara Kelompok Penambahan Polyethylene Fiber Dengan Penambahan Serat Sisal Tidak Berbeda Bermakna.Â Kesimpulan Dari Penelitian Ini Adalah Terdapat Peningkatan Kekuatan Fleksural Dan Impak Base Plate Komposit Resin Akrilik Pada Penambahan Polyethylene Fiber Dan Serat Sisal. Base Plate Dengan Penguat SeratSisal Memiliki Rerata Kekuatan Fleksural Paling Tinggi, Sedangkan Base Plate Dengan Penguat PolyethyleneÂ FiÂ ber Memiliki Rerata Kekuatan Impak Tertinggi.

ADDITIONAL OF CHEMICAL ENHANCER FOR INCREASING THE PENETRATIONAL FLUORIDE MOUSE SKIN: PENAMBAHAN BAHAN KIMIA UNTUK PENINGKATAN DAYA TEMBUS ION FLUORIDA PADA KULIT TIKUS Diyah Fatmasari; Iwan Dwi Prahasto; Akhmad Kharis Nugroho; Widjijono
Dentika: Dental Journal Vol. 17 No. 1 (2012): Dentika Dental Journal
Publisher : TALENTA

Fluoride plays an important roles in reducing dental caries by improving remineralization process and strengthening emailthrough forming fluoroapatite which is more resistant to acid. Fluoride systemic mode without passing metabolism withsmall and controlled dose need to be developed such as Transdermal route. The aims of this research was to find iffluoride solution with and without enhancer solution is able to penetrate to skin. Quasy experimental design with post testonly control group design as research approach was used. Transport test with Franz Like Diffusion cell used as theinstrument in vitro skin permeation test with hairless and full thickness mouse skin as membrane between donor andrecipient cell. Two groups of donor cell was fluoride solution and fluoride added with chemical enhancer: oleic acid andiso propyl alcohol (IPA) solution and recipient solution was CMF PBS 0,1 M pH 7,4. Control group was oleic acidsolution. Sample was taken for time interval of 4, 20 and 24 hours and Fluoride containt was measured by PotensiometerSpesific Ion Fluoride. The results showed that there was an influence of transport test both on NaF solution andNaF+oleat acid and IPA solution (p= 0.00) and (0.00) on fluoride permeation, however there was no significant differenceon control group (p= 0.07). NaF added with chemical enhancer solution and it had higher penetrating power than othersolution. It can be concluded that added chemical enhancer can increase the penetration of fluoride.

C-TELOPEPTIDE PYRIDINOLINE LEVEL IN GINGIVAL CREVICULAR FLUID AS INDICATOR OF ALVEOLAR BONE RESORPTION: KADAR C- TELOPEPTIDA PIRIDINOLIN PADA CAIRAN KREVIKULAR GINGIVA SEBAGAI INDIKATOR ADANYA RESORBSI TULANG ALVEOLAR Agustin Wulan; Widjijono; Suryono
Dentika: Dental Journal Vol. 16 No. 1 (2011): Dentika Dental Journal
Publisher : TALENTA

Periodontal disease is an inflammation and degeneration of chronical dental support tissue, accumulative, and progressive that caused tooth loss. Periodontal disease is caused by bacteria that has an ability to activate host response to produce pro-inflammatory mediator. Pro-inflammatory mediator causes collagen fibers degradation or destruction in periodontal tissue. Collagen cross- link of peri odontal tissue would be broken down and released into serum, and then excreted through urine. Collagen cross-link is called pyridinium cross-link, such as pyridinoline, deoxypyridinoline, N-telopeptide, and C- telopeptide (ICTP). This study was to investiga te the level in gingival crevicular fluid as an indicator of alveolar bone resorption. This study used 24 subjects with periodontal disease and 6 healthy subjects. Dividing of periodontal disease was based on periodontal index and every subject had minimum 20 teeth in mouth. Gingival crevicular fluid was taken at mesial site of maxillary posterior tooth by paperpoint and was measured by ELISA technique. The result showedthat the lowest level of ICTP was in control group, and the highest level was in grade 3 periodontitis group. The level of ICTP increased followed by periodontal disease progression. The result of Kruskal- Wallis-H and Mann-Whitney-U test showed th at was significant difference in ICTP between subject with and without periodontitis (p<0.05). It can be concluded that ICTP level in gingival crevicular fluid can be used as indicator of alveolar bone resorption in periodont al disease subjects.

CORRELATION BETWEEN CALCIUM BENTONITE CONCENTRATION AND PARAFFIN WAX TO THE HARDNESS OF CARVING WAX: HUBUNGAN ANTARA KONSENTRASI KALSIUM BENTONIT DENGAN PARAFIN MALAM TERHADAP KEKERASAN MODEL MALAM Widjijono
Dentika: Dental Journal Vol. 14 No. 1 (2009): Dentika Dental Journal
Publisher : TALENTA

The carving wax composes many natural or synthetic waxes and sometimes filler is added physical and mechanicalproperties. The aim of this study was to determine the correlation of concentration Ca-bentonite carving wax compositionand the hardness. The paraffin, carnauba wax, bees wax, Ca-bentonite, and inlay wax were used in this research. Thecarving wax compositions were made of paraffin, Ca-bentonite, carnauba wax, and bees wax ratio (% weight): 50:20:25:5(KI), 55:15:25:5 (KII), 60:10:25:5 (KIII), 65:5:25:5 (KIV), 70:0:25:5 (KV). All components were melted, then pouredinto hardness moulds (n=5). The carving wax properties were tested of their hardness by penetrometer (Setamatic, UK).Data were analyzed statistically by regression test and linearity by Anova. The results showed that regression linearsignificantly (p<0.05) and the regression of equation was Y = 18.365-50.940 X with coefficient regression of (R) = 0.922(p<0,05) and determinant factor 84.9 percent. The conclusion of this study was the adding of Ca-bentonite on thecomposition of carving wax improved its hardness with the significant linearity (p<0.05).

Pengaruh Lama Perendaman Fiber Reinforced Composite dengan Fiber Sisal (Agave sisalana) Terkalissai dalam Saliva Buatan Terhadap Perubahan Dimensi Wibowo, Diva Agrita Dentisia; Widjijono, Widjijono; Siswomihardjo, Widowati
Jurnal Material Kedokteran Gigi Vol 7 No 1 (2018): JMKG Vol 7 No 1 Maret 2018
Publisher : Ikatan Peminat Ilmu Material dan Alat Kedokteran Gigi (IPAMAGI)

Fiber reinforced composite is a material composed of matrix and reinforced by fiber. Fiber sisal is a natural fiber an alternatives synthetic fiber developed as dental material. Resin composite matrix is a hydrophilic substance that cause dimensional change. Alkalization of sisal fiber reduces the ability of hydrophilic sites which affects the dimensional changes. The aim of this study was to determine how different period of immersion affect dimensional change in samples. The samples used in this research were FRC made from flowable resin composite (Master Flow, Brazil), and alkalized sisal fiber. The samples were shaped into cuboid measuring 25x2x2 mm. Fiber was placed in the middle of sample with continuous unidirectional direction and then irradiated for 20 seconds using LCU. A total of 16 samples were divided to 4 groups, each group with the different period of immersion 0, 7, 14 and 21 days respectively. Dimensional changes were measured by the final dimension minus the initial dimension. Dimensional change was measured by the length, width, and height using digital sliding caliper with 0.001 mm nonius. The samples were immersed in the artificial saliva with pH 7. The data was analyzed using one way Anova and followed by LSD0.05. The result shows the mean value and standard deviation of dimensional changes with period of immersion at 0, 7, 14 and 21 days were 0.264Â±0.085, 2.856Â±0.089, 4.417Â±0.115 and 4.294Â±0.087 mm3. The F value obtained from one way Anova was 1.640Â±103 and the significance was 0.001 (p<0.05), indicated a significance difference. LSD presented a significance difference of mean to all treat,ent except for 14th and 21th day. This study concluded that various period of immersion increase effect to the dimensional changes of FRC with alkalized fiber sisal.

ANALISIS DAN PERANCANGAN SISTEM INFORMASI PERSEDIAAN UNTUK MENINGKATKAN PENGENDALIAN INTERNAL (STUDI KASUS PADA PT LOMAX) Widjijono, Vania Haryanto; Wehartaty, Tineke
Jurnal Akuntansi Kontemporer Vol 9, No 1 (2017)
Publisher : Graduate School, Widya Mandala Catholic University Surabaya

Inventory of raw materials is one of important asset for companies especially for manufacturing company. Therefore, companies require a good information system and internal control for their own inventory. Without an adequate information sys-tem and internal control, the effectiveness and efficiency of the operation will be hard to achieved. Researcherstried to do research of raw material inventory information system at PT Lomax Surabaya. PT Lomax Surabaya is a manufacturing company that pro-duce machines. The research method conducted is a case study using qualitative data. Data analysis techniquesis started from the evaluation of running raw material inventory information systems, evaluation of user requirements for information systems, eval-uation of internal controls, and the computerized design of raw material inventory information system. Result of this research is the design of raw material inventory information systems that can improve not only internal control but also effectiveness and efficiency of operation of the company. A new system will be able to reduce the risk of recording errors, to improve quality of raw material inventory information and to issue an accurate and timely report.

Pengaruh Konsentrasi Natrium Bikarbonat dalam Pasta Gigi Terhadap Streptococcus mutans Nisaa, Khairun; Widjijono, Widjijono
Mutiara Medika: Jurnal Kedokteran dan Kesehatan Vol 8, No 2 (s) (2008): Juli
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/mmjkk.v8i2 (s).9408

Antimicrobial substance into dentifrice is to destroy or inhibit the microorganisms that are associated with oral disease. One of the antimicrobial substances is a sodium bicarbonate. Sodium bicarbonate characterized as antimicrobial agent and buffering solution, the function of a buffer is to stand with change in pH after additional acid or base. This research is carried out to ï¬nd out the effect of sodium bicarbonate concentration dentifrice to the growth of Streptococcus mutans. This research is an experimental laboratory. One millimeter suspension of Streptococcus mutans inoculated in MHA. After wards the agar was divided into 5 sectors and each was made a well and each well was loaded sodium bicarbonate dentifrice with 5 %, 10%, 15%, 20% concentration. The media was incubated for 48 hours in 37Â°C. Potential antimicrobial was measured by sliding caliper with 0. 01 mm in accuracy. This research uses twenty ï¬ve samples. Data analysis was done One-way ANOVA to know the effect variance concentration, and LSDM5 to know mean difference between groups sodium bicarbonate. The result of this research showed that there were significant difference among the concentration sodium bicarbonate within dentifrice to the growth Streptococcus mutans @2 0.05). The result of LSDâ€ 05 showed that there were significant differences between 0% concentration of sodium bicarbonate within dentifrice of 5%, 10%, 15%, and 20%. The conclusion of this research was that effect of sodium bicarbonate concentration within dentifrice to the growth of Streptococcus mutans.

Tingkat Kebersihan Mulut (OHI-S) pada Anak SD Kelas VI Di Desa Wonokromo Purwanti, Sari; Widjijono, Widjijono
Mutiara Medika: Jurnal Kedokteran dan Kesehatan Vol 8, No 1 (S) (2008): Januari
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/mmjkk.v8i1 (S).9421

Oral hygiene is ones of local factor that has a dominant determination in oral disease. In spite of it, the childrens oral health has an inï¬‚uence on good behavior to oral health status. The behavior is a very complex any thing that involves internal or external aspect, even psychological and physical. Elementary at the age of II -1 2 years of school student has already able to think rationally and precisely based on their mperience, along with the family support, in order to keep oral hygiene, but in the village, the reality of oral hygiene is still low.Based on those thoughts the aim of this research is to found the level of children oral hygiene at the age of II-I2 years. The object of this research is Wonokromo village in the border city of Kebulnen conï¬ne between Sawangan village and Kaliputih village. The samples of this research are I13 students that consist of 56 boys and 57 girls from three elementary schools in Wonokromo village. This research uses cross sectional survey to see the level of Oral hygiene in children in the 6"â€™ year of elementary school. The parameter of this research is oral hygiene index. This research is analyzed by descriptive statistic method with SPSS 14. The result of this research showed that 1.0 as the lowest number of OHI-S, and the highest on 5.6. The average from all of the samples was 2.9 :1: 0.835 (moderate criteria). The good criteria of oral hygiene was found in boys, beside the moderate and low criteria was found in girls, the chi-square result showed that p = 0.835, that means there is no difference between boys and girls (p 0.05). The conclusion of the research that the children in 6th years of elementary school in the Wonokromo village are on the moderate criteria of oral hygiene (OHI-S) level

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