• 한국치위생학회지
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• 제14권2호
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• pp.251-259
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• 2014

Objectives : The purpose of the study was to investigate the overall research trend and change in dental fear during 9 years(2004-2012) and to identify the major outcomes and future directions to research. Methods : Descriptive literature review was conducted for dental fear in Korea. The research setting should be elementary, middle, high schools and adults. Results : In this study, the literature review of the most used tools to measure fear was that DFS. The most commonly used instrument was Dental Fear Survey(DFS) in the literature review. The number of dacayed tooth was proportional to subjective fear and anxiety. The indirect experience of dental pain was heard from family and friends. So the fear caused the patients to have negative bias toward dental treatment. The negative reliability towards the dentist increased the dental fear to the patients. Conclusions : Through the literature review, dental hygienists are able to understand the dental fear of the patients.

• 한국치위생학회지
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• 제12권2호
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• pp.285-292
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• 2012

Objectives : This study examined the stress-coping methods used by Dental Hygiene students according to their degree of self-leadership to provide basic data for students' self-leadership training programs. Methods : Dental Hygiene students in Seoul and Gyeonggi-do were surveyed to measure their self-leadership in six categories-self-expectation, rehearsal, goal-setting, self-compensation, self-criticism, and constructive thinking-sand, in four categories-sproblem-centered coping, social support coping, emotional coping, and wishful thinking coping-son a scale of 1 through 5. Results : The findings of the study were as follows: The overall average score of self-leadership was 3.34 and the scores for each subfactor were 3.82 for self-compensation, 3.57 for self-expectation, 3.44 for rehearsal, 3.42 for goal-setting, 3.30 for self-criticism, and 3.12 for constructive thinking. The overall average score of stress-coping was 3.29 out of 5 and the scores for active coping were 3.14 for problem-centered coping and 3.38 for social support coping and for passive coping were 3.69 for wishful thinking coping and 2.95 for emotional coping. Self-leadership showed significant difference in terms of satisfaction with major and motivation for application. The six sub-factors of self-leadership and problem-centered coping and wishful thinking coping, the sub-factors of stress-coping, had significant correlations. Self-compensation and constructive thinking were significant factors of self-leadership that affect stress-coping. Conclusions : Based on the above findings, it was found that Dental Hygiene students' self-leadership is related to the use of efficient stress-coping. Therefore, it would be necessary to develop and apply educational approaches to improve their self-leadership so they can efficiently cope with various stressors that they will face after finding jobs.

• 대한치과기공학회지
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• 제30권1호
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• pp.17-23
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• 2008

Gypsum products are used for the preparation of stone casts of oral and maxillofacial structures and as important adjuncts to dental laboratory operations involved in the production of dental prosthesis. Accuracy and dimensional stability over time are properties of concern in fixed prothodontics. Gypsum products used in denstry are a form calcium sulfate hemihydrate and are classified as 1 of 5 types according to International Standard Organization(ISO) 6873. All die materials exhibit some dimensional change during setting, but expansion and contraction during setting and dimensional changes in response to varations in temperature and the water-powder ratio must be minimal. Although numerous investigators have studied the properties of die materials, several products have been introduced recently with manufacturer claims of superior dimensional stalility. The aim of this study was to determine the surface properties using various separating materials of dental gypsum products The results were as follows 1. In the comparison of first and second plaster distances before separation in different separating agent, there was no significant difference except using Trio separating agent. The interface using Trio separating agent forms like to pores. 2. In the comparison of first and second plaster distances after separation in different separating agent, there was significant difference. The interface of plasters using WD-40, Trio and Vaseline was showed some gaps. Each they were measured at average 7.97 $\pm$ 2.07 ${\mu}m$, 63.09 $\pm$ 23.25 ${\mu}m$, 27.59 $\pm$ 4.19 ${\mu}m$. 3. In the comparison of the surface, the surface of control sample(using none seperating agent) showed irregular properties and the surface using Trio and Vaseline become wrinkled. Specially the surface using Vaseline was showed shiny properties. But the surface using MAGIC SEP, Plaster seperating agent, WD-40 showed regular properties.

• 대한치과의사협회지
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• 제50권7호
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• pp.420-430
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• 2012

Purpose: The purpose of this study was to measure the absorbed dose and to calculate the effective dose for full-mouth periapical radiography using the portable dental x-ray machine and panoramic radiography Material and Method: Thermoluminescent chips were placed at 25sites throughout the layers of the head and neck of a tissue-equivalent human skull phantom. The man phantom was exposed with the portable dental x-ray machine and panoramic unit. During full-mouth periapical radiography the exposure setting was 60 kVp, 2 mA and 0.15 ~ 0.25 seconds, while during panoramic radiography the selected exposure setting was 72 kVp, 8 mA and 18 seconds. Absorbed dose measurements were obtained and equivalent doses to individual organs were summed using ICRP 103 to calculate of effective dose. Result: In the full-mouth periapical radiography, the highest absorbed dose was recorded at the mandible body follow with submandibular glands and cheek. Using panoramic unit, the highest absorbed dose was parotid glands and the following was back of neck and submandibular glands. The effective dose in full-mouth periapical radiography using portable dental x-ray machine was 46 ${\mu}Sv$. In panoramic radiography, the effective dose was 38 ${\mu}pSv$. Conclusion: It was recommended to panoramic radiography for general check in the head and neck area because that the effect dose in the panoramic radiography was lower than the dose in the full-mouth periapical radiography using portable dental x-ray machine.

• Restorative Dentistry and Endodontics
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• 제45권4호
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• pp.50.1-50.11
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• 2020

Objectives: In this study, we investigated the potential of amoxicillin-loaded polymeric microspheres to be delivered to tooth root infection sites via a bioactive reparative cement. Materials and Methods: Amoxicillin-loaded microspheres were synthesized by a spray-dray method and incorporated at 2.5% and 5% into a mineral trioxide aggregate cement clinically used to induce a mineralized barrier at the root tip of young permanent teeth with incomplete root development and necrotic pulp. The formulations were modified in liquid:powder ratios and in composition by the microspheres. The optimized formulations were evaluated in vitro for physical and mechanical eligibility. The morphology of microspheres was observed under scanning electron microscopy. Results: The optimized cement formulation containing microspheres at 5% exhibited a delayed-release response and maintained its fundamental functional properties. When mixed with amoxicillin-loaded microspheres, the setting times of both test materials significantly increased. The diametral tensile strength of cement containing microspheres at 5% was similar to control. However, phytic acid had no effect on this outcome (p > 0.05). When mixed with modified liquid:powder ratio, the setting time was significantly longer than that original liquid:powder ratio (p < 0.05). Conclusions: Lack of optimal concentrations of antibiotics at anatomical sites of the dental tissues is a hallmark of recurrent endodontic infections. Therefore, targeting the controlled release of broad-spectrum antibiotics may improve the therapeutic outcomes of current treatments. Overall, these results indicate that the carry of amoxicillin by microspheres could provide an alternative strategy for the local delivery of antibiotics for the management of tooth infections.

• 대한치과보존학회:학술대회논문집
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• 대한치과보존학회 2001년도 추계학술대회(제116회) 및 13회 Workshop 제3회 한ㆍ일 치과보존학회 공동학술대회 초록집
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• pp.564.2-564
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• 2001

For the purpose of explaining the mechanism of tooth discoloration caused by tetracycline (TC), a study was conducted by setting up the following in vitro system. Being evaluated were the TC concentration to give an optimum reaction state when it acted on hydroxyapatite(HA) granules and the absorbing wavelength of TC that had been irradiated with ultraviolet (UV) rays.(omitted)

• 보건의료산업학회지
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• 제14권2호
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• pp.67-77
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• 2020

Objectives: The Purpose of this study is to investigate the effect of self-leadership on the organizational effectiveness of a dental hygienist who has completed a bachelor's degree of dental hygiene science. Methods: A self-reported questionnaire was completed by 303 dental hygienists in the Jeonbuk area from July 1 to August 31, 2019. Data were analyzed through the chi-square test, t-test, one-way ANOVA, and multiple regression analysis using the SPSS 18.0 program. Results: Subject's age, marital status, and clinical experience had significant effects on self-leadership and organizational effectiveness. It was found that the course completion status of bachelor's degree was related to self-leadership and organizational effectiveness. Conclusions: Completing a bachelor's degree in dental hygiene science impacts self-goal setting and constructive thinking of self-leadership. This also influences job satisfaction and organizational commitment.

• 한국치위생학회지
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• 제21권4호
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• pp.321-336
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• 2021

The aim of this study was to investigate the caries management by risk assessment (CAMBRA) development process and the latest updated caries risk assessment for the domestic settlement of the CAMBRA program and the activation of dental clinics. A system for CAMBRA was published in California Dental Association (CDA) in 2007. To investigate whether CAMBRA can be successfully implemented outside a university setting, a practice-based research network (PBRN) was created in the San Francisco Bay Area. Based on the CAMBRA-PRAN clinical studies, the caries risk assessment (CRA) tool was updated for patients aged 6 through adults in 2019. The CAMBRA system is expected to be widely and actively used in the dental field in Korea to contribute to oral health care.

• 한국치위생학회지
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• 제19권6호
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• pp.907-918
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• 2019

Objectives: This qualitative research was conducted to clearly find and clinically understand dental hygienists' work experience in order to lay the legal foundation for their work range and safe execution. Methods: From March 1 to April 30, 2019, seven study participants were selected and participated in-depth interviews. Phenomenological research methodology was applied for intensive analysis. Results: They performed jobs that required no professionalism, such as dental assistance, except for scaling. Dental hygienists, nurses' aids, and dental technicians performed the same jobs regardless of difficulty level and legal work range. Dental hygienists failed to accurately recognize their legal work range. Since there was the wide gap between their legal work range and actual work range, it was necessary to expand the work range in line with actual conditions. Conclusions: Given the results, it is necessary to conduct in-depth discussions within the dental circle to make dental hygienists' work execution in line with reality by improving and discussing a legal system for job assignment and expansion of workers. Therefore, it is required to form a plan for the many jobs dental hygienists executed in a clinical setting.

• 대한치과기공학회지
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• 제9권1호
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• pp.57-65
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• 1987

In order to ascertain the aspects of the dental technicians training system which require improvement, and also to provide important data for use in setting up dental technicians manpower planning, our country's dental technicians training and employment status has been studied and analyzed. The objects of the survey are 2,315 dental technicians, the total number of persons licensed by The Ministry of Health and Social Affairs from 1965 to 1986. The results were as follows: 1. Education organs for dental technicians are education system such as health junior college and service training systems and 1,706 technicians have come from health junior college in our country. 2. Total number of employment of dental technicians employed in our country are, 1,541 and 406 of them are engaged in Seoul. So unbalanced employment of dental technicians will be troubled in a future. 3. All registrated to government are 4,847 till 1986, and 1,541 of them engaged are that is, we can suppose about employment of dental technicians in a future, 12,231 dental technicians will registrate to Health and Social Administration on 1996 and 3,530 of them will be able to take their job in Korea.