• 한국치위생학회지
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• 제19권1호
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• pp.1-17
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• 2019

This study investigates the overall research trends and related factors affecting the turnover of dental hygienists in Korea during the past 10 years (2007-2017) and analyzed the differences in the results of the research according to the main measurement tools. The literature review focused on turnover of dental hygienists in Korea. Inclusion criteria of selected studies were as follows: the domestic and foreign academic journals and theses published for the past 10 years (between 2007-2017). The most commonly used tool for measuring dental hygienist turnover was a tool developed by Lawler. The most used significant general characteristics is age and income, Job satisfaction (57.1%) and organizational commitment (40.0%) were the most frequently used predictors of turnover. The variables used for each turnover measurement tool were different, showing that the study results was different from according to the variables and significance level. Although there have been many studies related to the turnover of dental hygienists, different results have been shown depending on the measurement tools. When conducting research related to dental hygienist turnover, specific and clear presentation of measurement tool selection or development is needed.

• 한국치위생학회지
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• 제23권1호
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• pp.63-72
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• 2023

Objectives: This study aimed to identify the level of occupational and organizational retention intention and related factors among new dental hygienists. Methods: The participants were 195 dental hygienists employed for less than 24 months. A t-test and one-way analysis of variance were conducted to determine the level of intention to stay according to an individual's major-related characteristics and work environment awareness level. Pearson's correlation analysis was performed for each item, and stepwise multiple regression was performed for factors related to retention intention. Results: In the work environment, the organizational support network had the highest occupational retention intention (β=0.513). Organizational retention intention (β=0.351), working infrastructure (β=0.293), cooperation relationship (β=0.165), and management justice (β=0.151) were factors related to organizational retention intention (p<0.001). Employment at the practice hospital was related to occupational (β=0.167) and organizational retention intention (β=0.138), and satisfaction with clinical practice was related to occupational retention intention (β=0.327). Conclusions: New dental hygienists are expected to be actively utilized for long-term tenure in both occupations and organizations by actively reflecting on the results obtained through this study in the curriculum and working environment of dental hygienists.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1990년도 추계학술대회
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• pp.64-67
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• 1990

Bending strength, bending elastic modulus ,and fracture toughness of different types of dental composite resins were deter mined. The relationship between bending strength, fracture toughness and filler volume fraction of dental composite resin was understood. In Acoustic Emission(AE) behavior during fracture toughness test, characteristic generation patterns of each type were understood. The fracture toughness values, AE generation patterns, and the nature of fracture surface were analyzed to understand fracture behavior of dental composite resin.

• 대한치과기공학회지
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• 제30권1호
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• pp.33-39
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• 2008

Recently natural characteristics and esthetics have been interested increasing in clinical dentistry. Thus the evaluation of the shade of dental porcelain has become an important part in dental research. Noritake Super Porcelain EX-3 Vita shade A2 (Noritake, Japan) Vintage HaLo Vita shade A2 (Shofu, Japan), Vita omega 900 Vitapan 3D-master shade 2M2 (Vita, Germany) were conducted for six times for repeated firing in a way to observe the change of color with respect to the number of firing. The repeated firing was implemented with the vacuum firing and air firing, and by using Shade Eye-EX Chroma meter (Shofu, U.S.A.), the changes in values of shade, value and chroma were compared. With the above results, the change of color was not noticed only in Vita when repeated firing was applied.

• 한국생산제조학회지
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• 제18권6호
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• pp.604-613
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• 2009

Recently, researches to develop phased array ultrasonic examination techniques are proceeded to diagnose dental caries and the status of surgical operation of dental implant. Sound field analysis of phased array ultrasonic transducers were carried out in order to characterizing the ultrasonic phased array beams. The sound field of ultrasonic radiation was calculated for the sample called "gypsum-improved stone" with the similar characteristics of dental materials. Industrial phased array ultrasonic devices were utilized for the insptriion of the artificial flaws machined in the gypsum-improved stone. Dental implants were made at the pig jaw bone and defect images were confirmed for the dental implants.

• 한국학교보건학회지
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• 제12권2호
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• pp.305-319
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• 1999

The objective of this study were to evaluate the relation between post-examination management states of dental caries in elementary school students and a mother's dental health beliefs. We systematically chose 10 elementary school in urban and rural areas of Chungnam Province and determined the first class students of 5 and 6 grade in each school as study subjects. Among 837 participants, 669 students were diagnosed with dental caries after a 1998 periodic dental health examination was answered completely and analysed. The contents of the questionnaire for students were general characteristics, dental health behaviors, notification factors, treatment factors. Their mothers were surveyed by another questionnaire. The contents of the questionnaire for mothers were also general characteristics, dental health behaviors, and dental health beliefs. The result of this study were as follows 1. The prevalence of dental caries was 65.0% and there was no significant difference between urban and rural areas. 2. Meanwhile, 63.8% of students in urban areas knew the examination result through a doctor's explanation, 52.4% of students in rural areas learned through a school notification letter, 82.9% of all the students let their parents know of their dental caries. 3. Among the dental caries group, 36.3% of the students were treated as for treatment, most students in urban areas visited a dental clinic, but those in rural areas visited the dental dept of a public health center as for the treatment time, 35.9% of the students were treated immediately after the examination. 4. 44.9% of those treated answered that they felt they needed treatment; 67.2% of those not treated answered that they considered the treatment as a bother and unnecessary due to no pain. 5. Overall, the scores in the dental health beliefs in mothers were low. Especially among the 5 items of susceptibility and seriousness, the scored were very low but the benefit was high. Logistic regression analysis showed that the treatment of a child's dental caries was significantly associated with low scores of benefit in those untreated and high scores among those treated. Considering these results, health education to stimalate a mother's susceptibility and seriousness in health beliefs and for students to learn the need for treatment, including a more detailed post exam management system at the school level should be considered for a higher treatment rate.

• 한국치위생학회지
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• 제17권6호
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• pp.1013-1024
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• 2017

Objectives: The study investigated health professionals working in the metropolitan area and Jeolla-bukdo, South Korea, from April 30 to May 17, 2017 to understand their views on the issue of including dental hygienists in the scope of medical personnel of South Korea. Methods:A total of 270 surveys were analyzed in this study. The survey consists of 5 questions on general issues; 10 on the awareness of present work of dental hygienist; and 1 on opposition or approval about including dental hygienist in medical personnel. The collected data were analyzed using SPSS for Windows 18.0, as well as frequency analysis, cross analysis and logistic regression analysis. Statistical significance level (${\alpha}$) is 0.05. Results: 1. Broken down by gender, male subjects showed more oppositions against including dental hygienists in the category of medical personnel while female subjects showed more favorable opinions (p<0.05). In terms of academic background, those who had graduated from graduate school or higher showed a higher propensity for opposition while those who had graduated from a 3-year college showed a higher tendency for approval on the idea (p<0.05), In terms of occupational type, health professionals showed more opposing views whereas medical technologists showed more approvals than others (p<0.001). 2. With respect to the awareness of work specialty and proficiency of dental hygienist according to general characteristics, the higher the age, the higher the awareness level was. In terms of the occupational type, medical technologists were found to have higher awareness level than health professionals (p<0.001). 3. With respect to the relationship between general characteristics and view on including dental hygienists in medical personnel, the occupational type of health professional was found to have 6.33 times more oppositions than medical technologists. When the awareness level on proficiency of dental hygienist was low, opposition was 6.52 times more frequent (p<0.05). Conclusions: Based on the findings above, the inclusion of dental hygienists in medical personnel seems necessary in properly establishing the specialty and role of dental hygienist in the dentist medical environment of the country in order to enhance national oral health related preventive dental service and expand the demand. To this end, it is necessary to provide nationwide promotion, work to change the awareness of health professionals in other occupational types, and facilitate public promotion for legal ground establishment.

• 한국추진공학회지
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• 제13권1호
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• pp.34-42
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• 2009

의료용 고속 에어터빈 핸드피스는 치아 절삭 도구로써 지난 50년 동안 치의학분야에서 사용되어왔으나, 그것에 대한 성능 연구가 많이 없었다. 그래서 수치해석을 이용하여 핸드피스 터빈 형상의 성능 특성을 본 논문에서 연구하였다. 정상상태 방법 중 하나인 프로즌 로터 방식을 이용하여 터빈 블레이드의 위치에 따라 5가지의 경우에서 계산하였다. 형상과 반사각에 따른 터빈 블레이드의 특성을 분석하였다. 계산 결과에 따르면, 터빈 블레이드의 반사각이 증가할 때 토크가 증가하였다.

• Tribology and Lubricants
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• 제29권4호
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• pp.235-241
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• 2013

The tribological characteristics of dental metal alloys and zirconia were studied by carrying out a friction and wear performance test. In this study, a pin-on-disk-type tester was used and dead weight was employed as the normal load applied to the test specimen. The friction coefficient of dental metal alloys was investigated in terms of their weight and sliding velocity. Microscopic observations were carried out on worn surfaces of specimens. The results indicated that among all metal alloys, Super-A had the highest friction coefficient. Super-A had the lowest amount of wear among all metal alloys, and the amount of wear increased in the following order: Crown & Bridge, Porcelain, and Partial. Crown & Bridge had the best friction coefficient, but the hardness of Crown & Bridge was lower than that of Porcelain and Partial. Experimental measurement results indicated that the disk weight before and after the experiment was the same.

• 한국치위생학회지
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• 제10권6호
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• pp.1121-1128
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• 2010

Objective : This study was to survey the differences of bone mineral density and oral health-related characteristics according to smoking status. Methods : The data for this study were collected by Oral health-related questionnaire and BMD measurements of 20s adults(205) who were using gym in D college areas from July 5th to 9th, 2010. Results : 1. There were a significant difference of 65.4 % of male in smoker group, 59.8% of women in non smoker group(p=0.000). 2. There were a significant difference in subjective oral symptoms among yellow teeth(p=0.000). 3. There were no difference in the T-score of DMB according to smoking. Conclusion : According to the study on smoking, only subjective oral symptoms were shown while the differences at bone mineral density were insignificant. Above findings suggest that further study about the expanding the number and ages of the subjects, smoking, BMD, and oral health related studies is necessary.