• Journal of Technologic Dentistry
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• v.46 no.3
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• pp.101-106
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• 2024

Purpose: This study evaluated the potential of a vacuum-brazed dental diamond dresser as an alternative to commercially available electroplated diamond dressers and assess its suitability for clinical use. Methods: Commercially available electroplated diamond dressers were selected as the control group (n=5), whereas vacuum-brazed diamond dressers with 80 grit and 100 grit particles were fabricated as the experimental groups (n=5 each). Prepared specimens were evaluated for surface roughness, wear resistance, and abrasiveness against a wear-inducing element (ZrO₂ ball). The results were reported as means and standard deviations. Statistical analyses were performed using one-way ANOVA followed by Tukey's HSD test using SPSS Statistics ver. 23.0 (IBM), with the significance level set at 0.05. Results: Surface roughness was highest in the 80 grit group (23.99±3.62 ㎛) followed by the 100 grit group (20.38±1.79 ㎛) and the control group (17.59±0.56 ㎛). Wear resistance was greatest in the control group (0.0060±0.0009 g) followed by the 80 grit group (0.0018±0.0003 g) and the 100 grit group (0.0013±0.0001 g). Abrasiveness against the ZrO₂ ball was highest in the 80 grit group (0.120±0.007 g) followed by the 100 grit group (0.101±0.007 g) and the control group (0.086±0.004 g). Conclusion: This study offers key insights for enhancing the performance of diamond dressers through vacuum-brazing and is expected to aid in the development of more efficient and durable diamond dressers for future applications.

• Journal of Technologic Dentistry
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• v.46 no.3
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• pp.107-113
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• 2024

Purpose: This study aimed to develop dental alumina ceramic dressers, evaluate their abrasive wear characteristics based on particle size, and identify dental dressers with optimal particle size and performance. Methods: Commercial ceramic dressers (n=5) were selected as the control group, whereas alumina ceramic dressers with 80-grit and 120-grit particles were fabricated as the experimental groups (n=5 each). Prepared specimens were assessed for surface roughness, wear resistance, and abrasiveness against a wear-inducing element (SUS304 stainless steel ball). Means and standard deviations were calculated for each test. Statistical analysis was performed using the Kruskal-Wallis H test with Bonferroni correction (α=0.05) via SPSS Statistics ver. 23.0 (IBM). Results: Surface roughness was highest in the 80-grit group (22.734±1.308 ㎛), followed by 120-grit group (21.804±0.785 ㎛), and lowest in control group (15.782±0.223 ㎛). Wear resistance was greatest in 120-grit group (0.007±0.002 g), followed by the 80-grit group (0.007±0.004 g), and lowest in the control group (0.370±0.010 g). Furthermore, abrasiveness against the wear-inducing element (SUS304 stainless steel ball) was highest in 120-grit group (0.017±0.003 g), followed by the 80-grit group (0.015±0.003 g), and lowest in control group (0.010±0.001 g). Conclusion: Based on the combined results of surface roughness, wear resistance, and abrasiveness against a wear-inducing element, the newly developed alumina ceramic dressers show promise for clinical application.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.35 no.2
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• pp.119-126
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• 2024

Objectives: Non-suicidal self-injury (NSSI) and suicidal behavior, including suicidal ideation (SI) and suicide attempts, are important predictors of suicide in adolescents. This study aimed to investigate the associations between NSSI, SI, NSSI+SI, mental health problems, and family factors in Korean adolescents in Jeju Island, with an emphasis on key findings. Methods: A total of 561 adolescents completed self-report questionnaires regarding demographics, NSSI, SI, suicidal behavior, perceived family functioning, and mental health problems, which were assessed using Center for Epidemiological Studies Depression Scale for Children, Screen for Children Anxiety-Related Disorders (SCARED), and Youth Self-Report (YSR). Data were analyzed using descriptive statistics, one-way analysis of variance, chi-square test, post-hoc analyses, and multivariate logistic regression. Results: In this study, 22.3% of adolescents reported either NSSI or SI, with 5.5% reporting NSSI and 20.7% reporting SI. Combined (NSSI+SI) group showed a significantly higher SCARED score, anxiety/depression, thought problems, attention problem, and rule breaking on YSR than did the SI only group. Higher level of depression and anxiety were significantly associated with NSSI and SI. Female sex and perceived family dissatisfaction were significantly associated factors for SI, but not for NSSI in multivariate logistic regression. Conclusion: This study provides insights into the clinical characteristics and associated factors among adolescents with NSSI, SI, and NSSI+SI in Jeju Island. Identifying these results can inform the development of targeted prevention and intervention strategies to mitigate the negative consequences of these behaviors and contribute to a better understanding of the role of family in this context.

• The Korean journal of internal medicine
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• v.39 no.4
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• pp.625-639
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• 2024

Background/Aims: Intensive care unit (ICU) quality is largely determined by the mortality rate. Therefore, we aimed to develop and validate a novel prognostic model for predicting mortality in Korean ICUs, using national insurance claims data. Methods: Data were obtained from the health insurance claims database maintained by the Health Insurance Review and Assessment Service of South Korea. From patients who underwent the third ICU adequacy evaluation, 42,489 cases were enrolled and randomly divided into the derivation and validation cohorts. Using the models derived from the derivation cohort, we analyzed whether they accurately predicted death in the validation cohort. The models were verified using data from one general and two tertiary hospitals. Results: Two severity correction models were created from the derivation cohort data, by applying variables selected through statistical analysis, through clinical consensus, and from performing multiple logistic regression analysis. Model 1 included six categorical variables (age, sex, Charlson comorbidity index, ventilator use, hemodialysis or continuous renal replacement therapy, and vasopressor use). Model 2 additionally included presence/absence of ICU specialists and nursing grades. In external validation, the performance of models 1 and 2 for predicting in-hospital and ICU mortality was not inferior to that of pre-existing scoring systems. Conclusions: The novel and simple models could predict in-hospital and ICU mortality and were not inferior compared to the pre-existing scoring systems.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.10
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• pp.6158-6167
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• 2014

The aim of this study was to perform comparative analysis of the duties of 7 new roles of HIMs in Malaysian and Korean hospitals of a similar scale. A Malaysian general hospital with a scale of 272 hospital beds was chosen. The researcher visited a Malaysian hospital in person and interviewed the staff in charge over a 2 week period from July 22nd 2013 to August 2nd 2013. For domestic hospitals, 13 general hospitals with 270 hospital beds, similar to the Malaysian general hospital, were chosen. Phone interviews with the department recorded the duty recording work. Regarding 7 new roles of Health Information Manager (HIM), although the role as a Health information manager and Security Officer in Malaysian general hospital was not defined, 30.8% performed their role in Korean general hospitals. The classification of disease & procedure within the role of Clinical data specialist was performed by both countries, and while the tumor registry was done in a Malaysian general hospital, only 15.4% of Korean general hospitals were operating. The statistics of the discharged patients were not measured in the Malaysian general hospital but 76.9% of Korean general hospitals recorded these statistics. Although 22.1% of Korean general hospitals operated registration work of special disease, Malaysian general hospital not only had a total legal contagious disease registration, but also took charge of information registration of hospital births and deceased ones. Other than these, the Patient Information Coordinator, Data Quality Manager, Document and Repository Manager, Research and Decision Support Analyst roles were not done by either country. The new role of HIM is operated in a low percentage in Korean middle and small hospitals. Therefore, to clearly establish the role of HIM in Korea, and have middle and small hospitals to operate such a role, it is essential for the related association to give continuous education and provide support to clarify the role within the hospital working environment. It is desirable to benchmark Malaysian general hospital's registration work on special diseases and others, and expand the work to improve overall.

• The Korean Journal of Nuclear Medicine Technology
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• v.26 no.1
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• pp.27-32
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• 2022

Purpose When performing a whole-body bone scan, many patients are experiencing psychological difficulties due to the close distance to the detector. Recently, in the medical field, there is a report that using virtual reality (VR) equipment can give pain relief to pediatric patients with weak concentration or patients receiving severe treatment through a distraction method. Therefore, in this paper, VR equipment was used to provide psychological stability to patients during nuclear medicine tests, and it is intended to evaluate whether it can be used in clinical practice. Materials and Methods As VR equipment, ALLIP Z6 VR (ALLIP, Korea) was used and the experiment was conducted after connecting to a mobile phone. The subjects were 30 patients who underwent whole-body bone examination from September 1, 2021 to September 30, 2021. After intravenous injection of 99mTc-HDP, 3 to 6 hours later, VR equipment was put on and whole body images were obtained. After the test, a survey was conducted, and a Likert scale of 5 points was used for psychological anxiety and satisfaction with VR equipment. Hypothesis verification and reliability of the survey were analyzed using SPSS Statistics 25 (IBM, Corp., Armonk, NY, USA). Results Anxiety about the existing whole-body bone test was 3.03±1.53, whereas that of anxiety after wearing VR equipment was 2.0±1.21, indicating that anxiety decreased to 34%. When regression analysis of the effect of the patient's concentration on VR equipment on anxiety about the test, the B value was 0.750 (P<0.01) and the t value was 6.181 (P<0.01). decreased and showed an influence of 75%. In addition, overall satisfaction with VR equipment was 3.76±1.28, and the intention to reuse was 66%. The Cronbach α value of the reliability coefficient of the questionnaire was 0.901. Conclusion When using VR equipment, patients' attention was dispersed, anxiety was reduced, and psychological stability was found. In the future, as VR equipment technology develops, it is thought that if the equipment can be miniaturized and the resolution of VR content images is increased, it can be used in various clinical settings if it provides more realistic stability to the patient.

• Journal of dental hygiene science
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• v.16 no.6
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• pp.488-494
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• 2016

The purpose of the present study was to examine dental hygienists' perception of the current national practical examination. This research was performed using 199 self-reported surveys answered by professors of dental hygiene studies and clinical dental hygienist. Frequency analysis, chi-square tests, and analysis of variance were performed by using IBM SPSS Statistics ver. 20.0. The results revealed that many of the respondents consider the current national practical examination to be neutral. They did not think that the current national practical examination questions are useful for assessing occupation-centric integrated clinical practice ability and counseling techniques for patient intervention. The professors of dental hygiene studies believed that among the research tasks required as mentioned in the national practical examination questions, dental polishing and tooth brushing education are of paramount importance, whereas clinical dental hygienists believed that ultrasonic scaling is the most important (p<0.05). Most of the professors of dental hygiene studies reported that they conducted skills education for dental polishing and tooth brushing education, while most of the clinical dental hygienists reported that tasks actually performed in the clinic included impression taking, model fabrication, ultrasonic scaling, and explaining treatment precautions (p<0.05). Therefore, these tasks can be effectively carried out with the improvement of the national dental hygienist practical examination.

• The Journal of KAIRB
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• v.6 no.1
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• pp.5-16
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• 2024

Purpose: The purpose of this study is to investigate the current status of pediatric assent in nationwide hospitals and to assess the children's comprehension for pediatric assent by interviewing pediatricians/pediatric neurologists to determine whether children of the age (elementary and middle school students) can understand the purpose, risks, benefits, and concepts of voluntary participation in clinical research described in the assent form, and to help improve the administrative efficiency of multicenter clinical trials. Methods: The status of pediatric assent was surveyed online using Google Forms at 141 university hospitals with administrative staff who are members of the Institutional Review Board (IRB) administrative staff subcommittee with in Korean Association of Institutional Review Boards (KAIRB). Additionally, face-to-face interviews were conducted with 7 pediatricians/pediatric neurologists. Survey and interview responses were summarized using descriptive statistics. Results: Out of the 141 institutions surveyed, 35 institutions (24.8%) responded. Among them, 30 institutions (85.7%) reported having age criteria for acquiring pediatric assent forms in the case of children. The age range for pediatric assent acquisition have been from 7 years old to 12 years old (15 institutions, 50%), and from 7 years old to 15 years old (7 institutions, 23.3%). Nine institutions (25.7%) have had criteria for obtaining both parents' consent in cases involving the participation of children. Nineteen institutions (54.3%) have had checklists or guidelines available for use by IRB members in study protocols involving vulnerable research subjects. Three pediatricians/pediatric neurologists have believed that upper-grade elementary school students (5th-6th grade) could comprehensively understand informed consent forms. Two have believed that middle school students would be able to understand them if they included personal information. Two pediatricians/pediatric neurologists have believed that even lower-grade elementary school students (1st-4th grade) could understand the explanations if they were made simpler. Conclusion: It is suggested that not only elementary school students (7-12 years old) but also middle school students (13-15 years old) should receive pediatric assent forms, as it would facilitate a comprehensive understanding of the forms. To enhance the comprehension of assent form content, it is necessary to use age-appropriate words, language, and expressions in the forms hospital. It is also recommended to create comics or videos to make the content of the assent forms more accessible for children.

• Journal of agricultural medicine and community health
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• v.27 no.2
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• pp.107-126
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• 2002

Health sub-centers(HSCs) have played an important role in primary health care in rural area in Korea. The unification of neighboring HSCs was a strategy to improve the role of HSCs. This study was conducted to reveal the efficacy of the unified HSC established in Yangbuk-myeon, Gyeongju-si in1997. The utilization patterns of HSC and its related factors, and satisfaction of consumer on HSC were compared before and after unification of two HSCs in Gampo-eup, Yangnam-myeon using questionnaire survey, and also the statistics of medical care services and public health services were compared. Four hundred forty nine subjects were questioned in survey, 156 from Gampo-eup, 147 from Yangbuk-myeon, and 146 from Yangnam-myeon. Following unification, the utilization rates and the frequency of visits in Gampo-eup declined. In all three areas, chronic illness was the common factor influencing the utilization and change in frequency of visits to the unified HSC. Following unification, aspects of consumer satisfaction, for example; accessibility and affordability decreased in Gampo-eup, but increased in both Yangbuk-myeon and Yangnam-myeon. The statistics relating to medical care, X-ray examination, home visiting service, vaccination, and health education showed an increase for the unified HSC when compared to the sum of the statistics for the previous two. The execution rates for other public health services were the same, or a little decreased. Clinical laboratory examinations and the issuing of civil affair documents were new services offered by the unified HSC. It is concluded, the overall consumer satisfaction with the unified HSC was improved. In Gampo-eup, where after unification there was no HSC, it seemed to be a barrier to accessing the unified HSC. The effect of the unified HSC, in the respect of medical care and public health services, was not as significant as expected at the time of being established. Therefore, the strategies to reenforce the unified HSC should be developed to provide all residents with comprehensive primary health care services.

• Journal of Hospice and Palliative Care
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• v.6 no.2
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• pp.172-176
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• 2003

Purpose : This study was designed to evaluate the perception of cancer in the students of Korea University. Methods : 1,000 students of Korea University were surveyed by questionnaire from March 2001 to September 2002. Nine hundred ninety two complete questionnaires were returned. The data were analyzed by descriptive statistics, and Chi-square analysis using the SPSS program. Results : 701 students (76.1%) replied that cancer is a curable disease. However, the degree of satisfaction for cancer treatment with modem clinical medicine was low (37.5%). Moreover, they thought that there was no difference between the efficacy of treatment by chemotherapy, alternative medicine, or dietary modification. But, the positive evaluation for the effectiveness of chemotherapy in the students who had cancer patients in their families was higher than that in the students without the experience of cancer patients in their families. Six hundred ninety four students (75.3%) replied positively for euthanasia in terminal cancer patients. And they thought that the dignity and the right of the patients were the most important point that should be considered in making the decision of euthanasia. Conclusions : The credibility to modem clinical medicine for cancer treatment was relatively low in the students of Korea University who had no cancer patients in their families. So, further studies and trials will be warranted to evaluate the causes of these results and improve the credibility of modem clinical medicine for cancer treatment in the general population.