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THE EFFECT OF REPETITIVE METAL CASTING ON THE TENSILE STRENGTH OF DENTURES Sri Wiwik Wiyanti; Mujiwati Mujiwati; Adi Wibowo, Sambodo; Marzia M. Tetelepta; Imas Maesaroh
Journal of Vocational Health Studies Vol. 8 No. 2 (2024): November 2024 | JOURNAL OF VOCATIONAL HEALTH STUDIES
Publisher : Faculty of Vocational Studies, Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jvhs.V8.I2.2024.116-122

Abstract

Background: Dentures or prostheses function to replace chewing and dental arch structures. Denture plates used in dentistry are made with acrylic resin, metal, or a combination of acrylic and metal. Metals are shiny, opaque chemical substances and good conductors of heat and can be polished. Recycling or reusing used metal is an option in making prostheses because the price of new metal is increasing, and metal recycling is quite effective. Purpose: To determine the effect of repeated metal casting on the strength of the metal frame denture base. Method: The current research is a laboratory study with a tensile test in the form of dumbbells with iso 22674 with a length of 15 ± 1 mm and a diameter of 3 ± 1 mm. This research used 18 CoCr metal samples divided into three groups, namely 100% new metal group (control), 50% new + 50% repeated composition group, and 100% repeated group. Result: The mean strain of the new 100% CoCr metals group was 0.133%, strain mean of the new 50% CoCr + 50% repeated metals group was 0.1%, and the strain of the 100% repeated CoCr metals group was 0.066%. The average modulus of elasticity (MPa) for the new 100% CoCr metals group is 7866, or 711 MPa, the new 50% CoCr + 50% repeat metals group is 7538, or 833 MPa, the 100% CoCr metals group is 6659, or 336 MPa. Conclusion: The new 100% CoCr metal group has a higher average tensile strength value than the 50% new CoCr metal + 50% repeated group, and the lowest is the 100% repeated CoCr metal group.
FORMULASI SEDIAAN PASTA GIGI KARBON AKTIF DENGAN BASIS Virgin Coconut Oil (VCO) Imas Maesaroh; Silva Silviani
Jurnal Ilmiah Manuntung Vol 5 No 1 (2019): Jurnal Ilmiah Manuntung
Publisher : jurnal ilmiah manuntung sekolah tinggi ilmu kesehatan samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51352/jim.v5i1.183

Abstract

Activated carbon is defined as carbon that has a great absorptive capacity of anions, cations, and molecules in the form of organic and inorganic compounds, either in the form of solutions or gases. Activated carbon has been highly used for various things, mainly to absorb dirt or toxins. The pores formed on this activated carbon will bind the impurities on the tooth surface. Therefore, cleaning the yellowish substances on the teeth will be easier. The aim of this research is to make dentifrice formulation with variety of activated carbon concentrate as the active substance and Virgin Coconut Oil (VCO) as the basis to get best tooth paste formula, or to meet toothpaste quality requirement.The concentrate of activated carbon used was12.5%, 15%, 17.5%, 20% and the Virgin Coconut Oil (VCO) concentrate used was 10%, 12.5%, 15%, 17.5% , 20%. Other additives that were also used were calcium carbonate, sorbitol, glycerol, Na.CMC, saccharin, sodium benzoate, sodium lauryl sulphate, menthol and aquades. The result of research indicated that the nifty basis of VCO was F3 with 15% VCO concentrate and 15% of F1 activated carbon toothpaste formula, which fulfilled toothpaste quality requirement. This formula was used to test gray organoleptic test, delicate texture, and homogeneous. It also had a pH of 8 which was corresponding to the pH value requirement for dentifrice preparations according to SNI 12-3524-1995 ie 4.5 -10.5 and typical menthol odor and fresh taste. The toothpaste does not contain of air bubbles, separated lumps and particles, and foreign objects are not visible.
UJI AKTIVITAS ANTI DIARE SIRUP LIOFILISAT EKSTRAK BUAH HARENDONG (Melastoma affine D. Don) TERHADAP MENCIT (Mus musculus L.) Imas Maesaroh; Marini Marini
Jurnal Ilmiah Manuntung Vol 7 No 1 (2021): Jurnal Ilmiah Manuntung
Publisher : jurnal ilmiah manuntung sekolah tinggi ilmu kesehatan samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51352/jim.v7i1.404

Abstract

Harendong fruit (Melastoma affine D. Don) is empirically used by the community in the Mount Ciremai National Park as an anti-diarrheal medicine. Based on the results of research conducted by Safitri, et al, it is known that the extract of raw harendong fruit contains flavonoid and phenolic compound. Phenolic compound that is commonly found in fruit is tannin. Additionally, based on the literature, tannin has been proven to be useful as anti-diarrheal while flavonoid is useful as anti-bacterial. This study aims at determining the activity of harendong fruit extract syrup as anti-diarrheal in mice (Mus musculus L.). The research method in this study is carried out by giving oleum ricini as an anti-diarrheal inducer compared to positive control (loperamid HCl 11 mg / kg bw suspension) and negative control (Na CMC suspension). The harendong fruit lyophilisate syrup is made with different concentrations, namely 0.5%, 1% and 1.5%. Evaluation of the anti-diarrheal effect includes consistency of slimy / watery stools, soft and normal stools (including water absorption diameter, time of occurrence of diarrhea and stool weight), frequency of diarrhea and duration of diarrhea. The results of the test for the antidiarrheal effect of harendong fruit lyophilisate syrup at a dose of 0.5% has a weaker effect in suppressing the occurrence of diarrhea than the positive control. Then, harendong fruit lyophilisate syrup at a dose of 1% shows almost the same antidiarrheal effect compared to the positive control, while harendong fruit lyophilisate syrup with a dose of 1.5% has a stronger effect in suppressing the occurrence of diarrhea than the positive control.