Gyeong-Soon Han ¹, Youn-Soo Shim ², Yu-Ri Choi ³, Sun-Ok Jang ⁴

Affiliations
1 Department of Dental Hygiene, College of Health Science, Gachon University, Yeonsu, Incheon - 21936, KR
2 Department of Dental Hygiene, College of Health Science, Sunmoon University, Asan, Chungnam - 336-708, KR
3 Department of Dental Hygiene, Kyungdong University, Wonju-si, Gangwon-do - 26495, KR
4 Department of Dental Hygiene, Hallym polytechnic University, Chuncheon-si, Gangwon-do - 24210, KR

Abstract

The purpose of this study is to examine viscosity, micro-leakage, water solubility and absorption by using various lines of the resin-based temporary filling materials that have flow-ability. The experimental group included 3 types such as Denkist, Korea), Once-fill flow (Mediclus, Korea), Temp-it flow (Spident, Korea). The control group was used composite resin (Filtek^TM bulk fill, 3M, USA). Four groups by 5 pieces were classified by using the bovine tooth specimens. Viscometer (Wells Brookfield Cone/Plate, USA) was used for measuring viscosity. The measurement of micro-leakage was carried out thermo-cycling (Thermocycling, M.S.I Co., Korea) with giving a change in temperature totally 1000 times at 5℃ and 55℃. The specimen was penetrated the 2% methylene blue dye solution. The water solubility and absorption were gauged by using a precision scale (XS105, Mettler-toledo Inc., Germany). The following results were obtained. The viscosity in Filtek was the highest. Once-fill flow and Temp-it flow showed viscosity at a similar level. The viscosity in Quicks flow was the lowest, thereby having shown significant difference from other materials. Filtek had none with 0 in micro-leakage score, thereby having shown statistically significant difference from 3 groups. As for water absorption, the Temp-it flow group came to 58.96 (μg/mm³ ± 1.63), thereby having indicated the largest water absorption. However, the significant difference wasn't shown in the remaining groups. In terms of solubility, the Quicks flow group amounted to 8.33 μg/mm³ ± 0.32, thereby having shown the largest solubility. The significant difference wasn't shown in the remaining groups. In conclusion, the resin-based temporary filling materials, which were used in the experiment, couldn't be confirmed the material-based difference in viscosity, micro-leakage, water solubility and absorption.

Keywords

Micro Leakage, Viscosity, Water Absorption, Water Solubility.

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So-Youn An ¹, Youn-Soo Shim ², So-Young Park ³

Affiliations
1 Department of Pediatric dentistry, College of Dentistry, Wonkwang University, Dunsan - 302-120, Daejeon, KR
2 Department of Dental Hygiene, College of Health Science, Sunmoon University, Asan - 336-708, Chungnam, KR
3 Department of Dental Hygiene, Vision University College of Jeonju, Jeonju - 560-760, Jeonbuk, KR

Abstract

During the last decade, zirconium dioxide (zirconia, ZrO₂) ceramics, which have superior to mechanical properties and aesthetic advantages, can be used as alternative materials to metal-ceramic systems. The aim of this study was to report zirconia restoration for primary anterior teeth. Patient who took part in had verbal information and was written a consent form. They took radiographic and intraoral assessment for noting a pre-operative status. Tooth was prepared and laboratory procedure had done. Complete zirconia crown was adapt with self-etching adhesive cement. This clinical trial of very young patients provides successful results of aesthetic rehabilitative treatment of both a tooth with early childhood caries and primary anterior teeth. The findings after 6‑, 12‑, and 18-month follow‑up could be useful for improving clinical approaches in subsequent cases. In the result, patient and their care giver were satisfied with zirconia crown as anterior teeth restoration.

Keywords

Anterior Aesthetic Restorations, Customized Zirconia Crown, Deciduous Tooth, Early Childhood Caries, Zirkiz^® Crown.

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Youn-Soo Shim ¹, So-Youn An ², So-Young Park ³

Affiliations
1 Department Dental Hygiene, Sunmoon University, 70, Sunmoon-ro 221beon-gil, Tangjeong-myeon, Asan-si,Chungcheongnam-do - 31460, Korea
2 Department Pediatric Dentistry Wonkwang University, 77, Dunsan-ro, Seo-gu, Daejeon - 35233, Korea
3 Department Dental Hygiene, Vision University College of Jeonju, 235, Cheonjam-ro, Wansan-gu, Jeonju-si, Jeollabuk-do - 55069, Korea

Abstract

Objectives: This study identifies the effects of the health status of elderly living alone on remaining teeth to provide basic data that can be used in exercising proper health management. Methods/Statistical Analysis: The subjects for this study were 1,107 senior citizens living alone in Seoul, Korea. The demographical features and number of remaining teeth of research subjects were reviewed by calculating frequency and percentage. In order to examine the demographical characteristics and the remaining teeth impact factors per health status, multiple regression analysis was carried out. The explanatory power of the model was identified using the multiple Regression coefficients (R2). Findings: By gender, there were 376 (34.40%) male and 731 (66.0%) female senior citizens. For number of remaining teeth of research subjects, 716 (64.7%) had 11 to 15 teeth remaining. This group was followed by those with six to ten teeth at 293 people (26.5%), while 83 (7.5%) had less than five and 15 (1.4%) had 16 or more. Upon analyzing the impact factors of demographical features on remaining teeth, it was found that elderly women, younger age, higher education, and those with monthly incomes had more remaining teeth, and the explanatory power of variables was 84.2. For physical health status, those with good subjective physical health, no diabetes, and no osteoporosis had more remaining teeth. For mental health status, those with good subjective mental health, no depression, did not experience suicidal impulses, and less stress had more remaining teeth. For oral health status, those with good subjective oral health, no periodontal diseases, no dental carriers and no discomforts with mastication had more remaining teeth. Improvements/Applications: It is necessary to develop health care programs in order to help elderlies living alone to accurately perceive their health status, and to share with them the importance of remaining teeth.

Keywords

Elderly, Mental Health, Oral Health, Physical Health, Remaining Tooth.

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Seoul-Hee Nam ¹, Yu-Ri Choi ², Sun-Ok Jang ³, Youn-Soo Shim ⁴, Gyeong-Soon Han ⁵

Affiliations
1 Department of Dental Hygiene, Masan University, Changwon-si, 51217, Gyeongsangnam-do, KR
2 Department of Dental Hygiene, Kyungdong University, Wonju-si, 26495, Gangwon-do, KR
3 Department of Dental Hygiene, Hallym polytechnic University, Chuncheon-si, 24210, Gangwon-do, KR
4 Department of Dental Hygiene, College of Health Science, Sunmoon University, Asan-si, 31460, Chungcheongnam-do, KR
5 Department of Dental Hygiene, College of Health Science, Gachon University, Yeonsu - 21936, Incheon, KR

Abstract

Propolis is a natural substance which is produced from honey bees through collecting and transforming resins and exudates from plants. The propolis can use the medicine field for antibacterial effect. The purpose of our study was to investigate the antibacterial activity for the oral prevention of dental caries. The propolis was from Australia honeybees, diluted 5w% and 10w% in ethanol. The antibacterial activity of the treated propolis against Streptococcus gordonii(S. gordonii), Streptococcus intermedius(S. intermedius) and Streptococcus sanguinis(S. sanguinis) were determined using optical density and colony forming units. All experimental groups were effective against bacteria. Streptococcus intermedius and Streptococcus sanguinis were more effective compared to Streptococcus gordonii. All groups inhibition bacterial growth, but there were no significant differences of different wt% groups. There were significantly low activities treated with propolis. The antibacterial activity indicated propolis against Streptococcus gordonii, Streptococcus intermedius and Streptococcus sanguinis. Propolis possesses several medicinal properties. In this study, the 5 wt% and 10 wt% group of propolis was indicated antibacterial effects, which succeeded in inhibiting the bacteria growth. Our study showed a significant effect related to oral bacteria species. In conclusion, the antibacterial action observed in this study suggests that this propolis substance could be used as an alternative medicine for infectious conditions of the oral disease without causing any major local or systemic adverse effects.

Keywords

Antibacterial Activity, Dental Caries, Microorganisms, Propolis.

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Youn-Soo Shim ¹, So-Young Park ², Myoung-Hee Shim ³

Affiliations
1 Department of Dental Hygiene, College of Health Science, Sunmoon University, Asan-si, KR
2 Department of Preventive and Public Health Dentistry, College of Dentistry, Wonkwang University, Iksan-si, KR
3 Textile and Fashion R&D Center, Korea Textile Trade Association, Seoul, KR

Abstract

The objective of this study was to fabricate superhydrophobic surface with superhydrophobic property using nanoparticles and water-repellent agents for medical textiles. The wettability of the super hydrophobic surface was compared to that of other materials having a variety of roughness and surface energy. Microstructures were fabricated with 100% PET textiles having various yarn thickness and yarn finishing. Nano-sized structures were fabricated by finishing the PET textiles with CNTs nanoparticles using water-repellent agent. Contact angle (CA), contact angle hysteresis and shedding angle analysis were evaluated by Theta Lite contact angle meter (attension, Finland). Also, breathable waterproof properties were measured by water vapor transmission rate (ASTM 96-CaCl2) and air permeability (ISO 9237-1995). The results indicate that the super hydrophobicity was strongly influenced by the binary structure having nano-scaled roughness than by the chemical composition of surface. It was proven that the shedding angle, the angle at which a water droplet rolls off the surface, was reasonable method to analysis the super hydrophobic properties. Also, it was shown that all of the water-repellent agents and nano-particles did not decrease air permeability and water vapor transmission rate noticeably. The DTY sample treated with CNTs exhibited the highest super hydrophobic properties, having static contact angle of 160° and shedding angle of 4.4°. These results indicated that the long nanofiber shape of carbon nano tubes successfully maintained the trapped micro sized air layers like a papillae of lotus leaf.

Keywords

Medical Textile, Nano Particle, Superhydrophobic, Self-Cleaning

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