• Journal of Periodontal and Implant Science
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• v.39 no.4
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• pp.407-412
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• 2009

Purpose: This study was performed to evaluate the effect of powered toothbrush with a wireless remote display on the subjective and objective oral hygiene improvement. Methods: One hundred and fifteen subjects in healthy or mild gingivitis status between the ages of 20 and 90 were recruited and reviewed for study inclusion criteria. At first visit, 115 pre-screened subjects filled in the questionnaire form which consisted of demographic factors, behavioral factors (smoking, alcohol consumption), toothbrushing habits (brushing time and frequency), self-reported oral health status, and self-satisfaction. Baseline clinical indices (Plaque index, Gingival index) were also recorded by a periodontist. Subjects were instructed how to use powered toothbrush with a wireless remote display, and were provided with it. Thirty days after first visit, 90 subjects returned for the second assessment by self-reported questionnaire form and professional clinical checkup. Statistical analysis was performed using paired t-test for the difference between baseline and second visit data. The relationship among variables was examined with chi-square test and Fisher' s exact test. Results: Significant differences were not found on self-reported satisfaction related with sex, smoking, alcohol consumption (P<0.05). Self-reported tooth brushing habit was improved in the aspect of brushing time and frequency. Significant differences were found on the self-reported oral health status, self-satisfaction, and clinical indices between the baseline and second visit data (P<0.01). Clinical indices were significantly reduced after using powered toothbrush with a wireless remote display (P<0.01). No adverse reactions were reported during the study period. Conclusions: Powered toothbrush with a wireless remote display successfully promoted oral hygiene from the subjective and objective viewpoint after 30 days of home usage.

• Journal of dental hygiene science
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• v.17 no.2
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• pp.87-98
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• 2017

The purpose of this study was to understand the effectiveness of oral health education (OHE) or oral hygiene instruction (OHI) involving professional plaque control/removal, as compared to conventional plaque control/removal. By means of a systematic review of the literature, in the review of literature by using systematic method, Korean articles of plaque control including OHE or OHI, were studied in order to analyze and conclude the literature to enhance oral health. We found that self and professional plaque control/removal, in addition to tooth brushing instructions, decreased incidence and prevalence of loss of teeth. Taken together, professional mechanical plaque removals were most effective 4~5 visits every 1~2 weeks. Use of disclosing agent was more effective than oral education or model education. In line with oral hygiene education, professional brushing, oral prophylaxis, scaling and root planing, it was advisable to repeat the training according to the characteristics of the patient. Routine OHE or OHI would be help to increase to oral health. For a quality of life related oral health, reliability and validity of data are needed to develop and its data should be applied to dental health insurance policy.

• Journal of Korean society of Dental Hygiene
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• v.5 no.2
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• pp.297-309
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• 2005

The purpose of this study was to develop a standardized preschool oral health education program as one of educational media and to apply it to preschool education. It's ultimately meant to help improve the oral health education policy of the nation toward young children and to provide multiple information on that. The subjects in this study were 250 young children who were at the age of 7 and attended kindergartens in the city of S. To evaluate an oral health education program prepared in the study, the selected young children were taught by using it, and a survey was conducted twice before offering education and three weeks after it to assess their knowledge. Besides, their patient hygiene performance was tested. For data handling, SPSS program was utilized, and in order to see if there would be any changes in their oral health behaviors, statistical data on percentage were obtained and crosstab was employed. To track any possible additional changes in their relevant knowledge and Simplified Oral Hygiene Index, t-test was implemented. The findings of the study were as follows: 1. As for changes in oral health behaviors, there were significant differences in tooth brushing time(p<0.05), tooth brushing method(p<0.01) and toothbrush keeping method(p<0.001) between before and after the education. 2. Regarding changes in oral health knowledge, there was a significant gap between before and after the education(p<0.001). In detail, their knowledge about the cause of dental caries(p<0.05), the right choice of toothbrush(p<0.001) and toothbrushing after meals(p<0.01) became significantly different. 3. There was no gap in patient hygiene performance index between before and after the education. 4. To boost the effect of oral health education on kindergarteners, it seems necessary to give a lecture on oral health, to demonstrate tooth brushing by using dntiform, and to offer instruction by utilizing disclosing solution. 5. Repeated education should be provided on a regular basis by preparing standardized teaching plans tailored to the characteristics of kindergarteners, and a wide variety of teaching materials that could be easy to understand, authentic and provide motivation to them should be developed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.8
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• pp.265-272
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• 2017

The purpose of this study was to investigate the relationship between the dental screening and health care behaviors for 17810 residents of Gyeongsangnam-do province using the data of the community health survey conducted in 2014. The SPSS ver. 23.0 statistical program was used. The residents were male, aged 30-49 years, city dwellers, their final education level was college or higher, their income was more than 600 KRW monthly, and they had a lot of experience of dental screening. In terms of oral health care, scaling, brushing after eating, brushing before going to bed, and brushing more than 4 times a day were found in the dental screening. In terms of health care, the levels of drinking, without chronic diseases, self-rated health and self-rated oral health were high when the residents had experience of dental screening(p<0.001). Therefore, it is necessary to establish a plan to improve the oral examination rate, because the level of dental screening is related to the levels of subjective health awareness and chronic diseases and lifestyle, and it is necessary to develop an education program to improve the awareness of the need for regular dental screening.

• The Journal of Advanced Prosthodontics
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• v.13 no.3
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• pp.160-171
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• 2021

Purpose. This in-vitro study evaluated and compared the color stability of 3D-printed and conventional heat-polymerized acrylic resins following aging, mechanical brushing, and immersion in staining medium. Materials and methods. Forty disc-shaped specimens (10 mm in diameter and 3 mm thick) were prepared from two 3D-printed [DentaBASE (DB) and Denture 3D+ (D3D)] and one conventional polymethylmethacrylate (PMMA) denture materials. The specimens were thermo-cycled, subjected to mechanical brushing, and were immersed in either coffee, lemon juice, coke, or artificial saliva (AS) to simulate one and two years of oral use. Color measurements of the specimens were recorded by a spectrophotometer at baseline (T0), and after one (T1) and two years (T2) of simulation. The color changes (ΔE) were determined and also quantified according to the National Bureau of Standards (NBS) units. Descriptive statistics, followed by factorial ANOVA and Bonferroni post-hoc test (α=.05), were applied for data analysis. Results. The independent factors, namely material, staining medium, and immersion time, and interaction among these factors significantly influenced ΔE (P<.009). Irrespective of the materials, treatments, and time, the highest and the lowest mean ΔEs were observed for PMMA in lemon juice (4.58 ± 1.30) and DB in AS (0.41 ± 0.18), respectively. Regarding the material type, PMMA demonstrated the highest mean ΔE (2.31 ± 1.37), followed by D3D (1.67 ± 0.66), and DB (0.85 ± 0.52), and the difference in ΔE between the materials were statistically significant (P<.001). All the specimens demonstrated a decreased color changes at T2 compared to T1, and this difference in mean ΔE was statistically significant (P<.001). Conclusion. The color changes of 3D-printed denture resins were low compared to conventional heat polymerized PMMA. All the tested materials, irrespective of the staining medium used, demonstrated a significant decrease in ΔE values over time.

• The Journal of Advanced Prosthodontics
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• v.15 no.5
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• pp.227-237
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• 2023

PURPOSE. This study aimed to assess and compare the color stability, flexural strength (FS), and surface roughness of occlusal splints fabricated from heat-cured acrylic resin, milled polymethyl methacrylate (PMMA)-based resin, and 3D-printed (PMMA) based-resin. MATERIALS AND METHODS. Samples of each type of resin were obtained, and baseline measurements of color and surface roughness were recorded. The specimens were divided into three groups (n = 10) and subjected to distinct aging protocols: thermomechanical cycling (TMC), simulated brushing (SB), and control (without aging). Final assessments of color and surface roughness and three-point bending test (ODM100; Odeme) were conducted, and data were statistically analyzed (2-way ANOVA, Tukey, P <.05). RESULTS. Across all resin types, the most significant increase in surface roughness (Ra) was observed after TMC (P < .05), with the 3D-printed resin exhibiting the lowest Ra (P < .05). After brushing, milled resin displayed the highest Ra (P < .05) and greater color alteration (∆E₀₀) compared to 3D-printed resin. The most substantial ∆E₀₀ was recorded after brushing for all resins, except for heat-cured resin subjected to TMC. Regardless of aging, milled resin exhibited the highest FS (P < .05), except when compared to 3D-printed resin subjected to TMC. Heat-cured resin exposed to TMC demonstrated the lowest FS, different (P < .05) from the control. Under control conditions, milled resin exhibited the highest FS, different (P < .05) from the brushed group. 3D-printed resin subjected to TMC displayed the highest FS (P < .05). CONCLUSION. Among the tested resins, 3D-printed resin demonstrated superior longevity, characterized by minimal surface roughness and color alterations. Aging had a negligible impact on its mechanical properties.

• Journal of Korean Dental Hygiene Science
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• v.6 no.2
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• pp.1-12
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• 2023

Objectives: This study attempted to identify the eating habits and oral health behaviors of Korean teenagers, studying their relationship with oral health status. The findings serve as fundamental data to enhance proper eating habits and oral health-related projects, ultimately improving teenagers' oral health. Methods: It was analyzed through the original data of the 16th (2020) online survey of youth health behavior in Korea, Frequency analysis, complex sample cross-analysis, complex sample logistic regression analysis were conducted using the SPSSwin 21.0 program. Results: As a result of the study, was associated with the consumption of all sweet drinks, fast food intake, and the frequency of daily brushing over the past 7 days Teeth pain is noted with the consumption of soda, sweet drinks, fast food, and the frequency of daily brushing over the past 7 days. Gum bleeding is noted with the consumption of sweetened products, fast food intake, and the frequency of daily brushing over the past 7 days. Conclusions: Eating habits and oral health behaviors should be considered for the oral health management of middle and high school students. Specific measures should be sought to provide proper dietary education and systematic oral health education to improve the oral health of middle and high school students.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2002.11a
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• pp.216-221
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• 2002

물리적 스트레스는 식물의 성장과 형태형성 반응에 커다란 영향을 미치는데 14일 동안의 Brushing은 무의 기근율을 감소시켰고, 그 결과 타원형의 품질의 우수한 Radish root을 생산할 수 있었다(Latimer 1991). 그 외에도 상치, Cauliflower celery 묘의 내서성을 향상시킬 뿐아니라, 감자의 생체중과 건물중을 감소시킨다는 보고도 있다(Akers and Mithchell, 1985). (중략)

• Proceedings of the Korea Contents Association Conference
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• 2014.11a
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• pp.439-440
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• 2014

치과위생사들이 구강보건교육내영의 활용에서가장 많이 시행하는 것은 잇솔질 교육이지만 환자가 올바른 잇솔질을 행하는 실천률이 저조한 것은 환자의 동기유발이 불충분하기 때문이다. 이에 치과위생사의 잇솔질 교육을 녹음하여 환자의 동기를 이끌어내고 행동의 변화를 유지하는데 유용한 것으로 알려진 동기면담의 구성요소를 이용하여 분석하였다.

• Journal of Welding and Joining
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• v.3 no.2
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• pp.27-34
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• 1985

The mechanical properties and bonding mechanism of aluminum, copper and mild steel have been determined in cold pressure welding. The brittle cover layer to be established by scratch-brushing plays an important role in bond strength and has an influence on the threshold of deformation. The cold pressure welding was achieved at 54% of height reduction in A1-A1, 75% in Cu-Cu, 56% in Al-Cu, and 74% in Cu-steel. The height reduction at which the bond strength of weld interface was the same as the tensile strength of base metal should be over 76% in Al-Al, 82% in Cu-Cu, and 78% in Al-Cu.