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2014, Vol.14, No.5

  • 1.

    Review on International Caries Detection and Assess-ment System

    김희은 | 2014, 14(5) | pp.609~615 | number of Cited : 1
    Abstract PDF
    Objectives : In most developed countries there has been a substantial decrease in the prevalence of dental caries in children of 12 years old over the past 40 years. This change in epidemiology highlights the importance of preventive management in dentistry. For successful management of early caries lesions, it is essential to detect and assess the pathological changes of dental caries. Therefore, the purpose of this study was to investigate the overview of International Caries Detection and Assessment System(ICDAS) criteria for the detection and assessment of early caries lesions by literature reviews. Methods : The author reviewed the MEDLINE search by the key words of ‘caries assessment’, ‘caries detection’, ‘caries measurement’, and ‘ICDAS’Results : This literature review provided an overview of International Caries Detection and Assessment System(ICDAS) criteria for the detection and assessment of early caries lesions. This article showed the principles, concept, and primary caries detection criteria of the ICDAS. The ICDAS can macroscopically measure the enamel surface changes and potential histological depth of caries lesions by the surface characteristics of the teeth. The ICDAS criteria allow researchers and clinicians to choose the stage of dental caries and characteristics for assessment. Conclusions : ICDAS can be an adjunct method to clinical decision making and preventive treatment planning.
  • 2.

    Understanding and trends of esthetic treatment in prosthodontics:part 2. Zirconia

    강정인 | Heo, Yuri | 이명선 and 1other persons | 2014, 14(5) | pp.617~622 | number of Cited : 2
    Abstract PDF
    With the explosive increase of esthetic demands by patients, many dental materials for the esthetic restoration have been introduced. Recently, zirconia based restorations are using for the cases of single crown, bridges, implant prostheses etc. Zirconia have superior mechanical properties and biocompatibility. Owing to the properties of high strength, zirconia has to be manufactured by CAD/CAM system. Dental CAD/CAM system is a futuristic treatment and technical system which makes it possible to produce the precision and uniform prosthesis and also standardize the treatments. This article introduces the characteristics of zirconia, fabrication procedure using CAD/CAM system and procedure for the cementation of zirconia based restoration.
  • 3.

    Needs and perception of medical communication course in the dental hygiene students

    Ryu da young | HyunSuk Yang | Choi YongKeum | 2014, 14(5) | pp.623~630 | number of Cited : 6
    Abstract PDF
    Objectives : The aim of this study was to investigate the perception and needs for medical communication course in the dental hygiene students. Methods : A self-reported questionnaire was filled out by 700 dental hygiene students after receiving informed consent from October 30 to December 20, 2013. Results : A total of 652 completely answered questionnaires were analyzed. The medical communication course proved to be very important necessary that 46.6% of the students said ‘probably needed.’ Only 5.1% of the students answered the course is not necessary. Conclusions : The majority of the students want the medical communication course. It is desirable that we need to set up a medical communication training and systemic course.
  • 4.

    The recognition on English interests and anxiety in dental hygiene students

    천세희 | Gyu-Yil Choi | 2014, 14(5) | pp.631~639 | number of Cited : 1
    Abstract PDF
    Objectives : The purpose of the study is to investigate the influencing factors on English interest and anxiety in dental hygiene students. Methods : A self-reported questionnaire was filled out by 1,040 dental hygiene students in six universities in Busan and Gyeongnam from April 1 to 30, 2013. The questionnaire consisted of general characteristics, foreign language performance anxiety scale, and English interest. The data were analyzed using descriptive statistics, independent t-tests, one-way ANOVA, and multiple regressions. Results : Those who travelled abroad tended to have a liking for English. English credits significantly influenced on English interest. and employment. The period of English study was proportional to interest and grade of English. Conclusions : The interest and anxiety for English was the major factor to improve the mastery of English. The dental hygienists must try to improve the mastery of language proficiency.
  • 5.

    Attitude toward English learning in the dental hygiene students

    Yu-Ri Choi | Eun-Ji Lee | 유은미 and 2other persons | 2014, 14(5) | pp.641~648 | number of Cited : 1
    Abstract PDF
    Objectives : The purpose of this study is to investigate the attitude toward English learning in the dental hygiene students. Methods : A self-reported questionnaire was filled out by the 498 dental hygiene students in Seoul, Gyeonggi, Gangwon and Chungcheong Province. The questionnaire consisted of motive of English learning, confidence and interest. Data were analyzed by SPSS 19.0 program. Results : Approximately 85 percent of the students had strong motivation for English learning. Test-based English learning generally discouraged the students(61.8%). The students found that listening and speaking was the best way of learning English(44.6%). Most of the students were very interested in English but the cramming method of learning made them tired(p<0.05). Conclusions : Self-directed learning is the best way of learning English to the students. The curriculum should consist of actual listening and speaking practices instead of test-based study.
  • 6.

    The relationship between the satisfaction levels of education and clinical practice in the dental hygiene students

    Mi-Sook Cho | Kim, Chang-suk | 2014, 14(5) | pp.649~657 | number of Cited : 14
    Abstract PDF
    Objectives : The purpose of the study is to investigate the relationship between the satisfaction levels of education and clinical practice in the dental hygiene students and to provide the basic data for the improvement of satisfaction with major. Methods : A self-reported questionnaire was filled out by 487 dental hygiene students in Busan, Gyeongnam, and Ulsan. Data were analyzed by SPSS 19.0 program. Results : Those who chose the dental hygiene by themselves tended to have higher satisfaction(p<0.05). Those who chose the major by teacher’s advice tended to have higher satisfaction for the clinical practice(p<0.05). The satisfaction level between the education and clinical practice was equally proportional to each other. Multiple regression test showed that the influencing factors on satisfaction level included major satisfaction and lecture satisfaction(p<0.05). Conclusions : Satisfaction with the major influenced on the clinical practice performance. More systematic approach for the better curricula can bestow the students satisfaction with the major in the future.
  • 7.

    The relationship among self-esteem, life-satisfaction and stress coping style of dental hygiene students

    Lee, Ga-ryoung | 2014, 14(5) | pp.659~665 | number of Cited : 3
    Abstract PDF
    Objectives : This study aimed to determine the effects of stress coping type on self-esteem and satisfaction with life in dental hygiene students. In particular, an attempt is made to determine the effects of sub-factors of stress coping type on self-esteem and satisfaction with life, get a better understanding of self-esteem and satisfaction with life for dental hygiene students, and provide basic data in developing a program that can identify, prevent, and control the problems with stress for dental hygiene students. Methods : This is descriptive correlation research to determine the relations between self-esteem and stress coping type in dental hygiene students. 212 dental hygiene students at colleges in Ulsan Metropolitan City were asked to complete a self-administered questionnaire from June 10 to 20, 2013; then, 209 copies were used in analysis, with the exception of 3 copies which were excluded from recording. Results : Self-esteem and satisfaction with life were positively affected by active stress coping but were negatively affected by passive stress coping. As for such sub-factors of stress coping type as problem-focused coping, pursuit of social support, emotional relief coping, and hopeful thinking, the sub-factors of active coping type also positively affected self-esteem and satisfaction with life. Self-esteem interacted with the sub-factors of stress coping type and satisfaction with life. Conclusions : Since stress coping type was found to be a factor affecting self-esteem and satisfaction with life for students, the results of this study are expected to be used as basic data in developing a program that can help them cope actively with stress.
  • 8.

    Problem-solving ability of dental hygiene students in accordance by meta-cognition level

    JUN SOO KYUNG | Lee, Seong-Sook | Kim Dong Ae | 2014, 14(5) | pp.667~672 | number of Cited : 4
    Abstract PDF
    Objectives : The purpose of this study was to examine classifying the level and accuracy of the meta-cognitive level of students and dental hygiene, and to understand the impact on the process of problem solving and accordingly, it is intended to provide a basis for learning strategies. Methods : A self-reported questionnaire was filled out by 328 dental hygiene students in 3 colleges in Gyeonggi-do and Chungnam. Data were analyzed by the frequency analysis, one-way ANOVA, Scheffe‘s post-hoc test, Pearson‘s correlation coefficient using SPSS 12.0. Results : Meta-cognitive level of the subject was on average 4.43 points and problem solving level was lower at 2.82 points. Showed a significant difference in satisfaction with the major motives meta-cognitive level in accordance with the general characteristics of the subjects(p<0.05). Results of this study showed that no statistically significant differences in both the sub-areas of the level of problem solving according to the general characteristics of the subject(p>0.05). There was no correlation between the ability to solve problems and meta-cognitive level of the subjects(p>0.05). Conclusions : The finding of the study showed that meta-perception of dental hygiene students are lower the level of problem-solving that is compared to meta-cognition. It is suggested that development of a variety of learning methods for improving meta-cognitive thinking and problem-solving skills required in dental hygiene school curriculum.
  • 9.

    The awareness and performance towards the dental radiation protection behaviors in Busan and Gyeong-nam

    나현희 | 진혜정 | 이민경 | 2014, 14(5) | pp.673~680 | number of Cited : 6
    Abstract PDF
    Objectives : The purpose of this study is to investigate the awareness and performance towards the dental radiation protection behaviors in dental institutions in Busan and Gyeongnam. Methods : Two hundred and one dental medical institutions in Busan and Gyeongnam participated in the survey from March 10 to April 4, 2014. The data were analyzed using SPSS 19.0 for χ2 test, t-test, ANOVA, and multiple regression analysis. Results : There were significant differences in the awareness and performance towards the radiation protection behaviors according to age, monthly income, and type of hospital(p<0.05). Protective equipment influenced on the awareness and performance of dental staff and patients(p<0.001). The important variables on dental radiation protection included protection facility and education of protective equipment. It is found the variable to affect the performance of dental radiation protection was protection facility, wearing of protective device staff and patients, education on RSM. Conclusions : These results can provide the basic data for the effective dental radiation safety management and improvement for the dental institutions.
  • 10.

    Recognition of single tied system in dental hygiene education among dental hygienists

    Sun-Mi Lee | Kyungmi Kim | 2014, 14(5) | pp.681~687 | number of Cited : 1
    Abstract PDF
    Objectives : The purpose of the study is to investigate the recognition of the single tied system in dental hygiene education. Methods : A self-reported questionnaire was filled out by 302 dental hygienists in Seoul and Gyeonggi Province from May 1 to 30, 2013. The questionnaire included general characteristics, recognition of single tied education system, and duration of the bachelor course. The data were analyzed using SPSS(PASW statistics) 18.0 program for frequency analysis, t-test, and ANOVA. Results : The majority of the respondents agreed the necessity of the single tied system of curricula. The expectation of acquisition of bachelor and continuous education showed 3.23 points of 5 points. Pros and cons for the single tied curriculum system accounted for 50 percents respectively. The majority of the respondents(74.3%) agreed that there was no difference between the 3 year curricula and 4 year curricula. Conclusions : It is necessary to unite the opinion debate for the single tied curriculum system in the dental hygiene department through analysis and review for the curricula.
  • 11.

    A study on the relationship between personality type and sense of vocation of clinical dental hygienist

    Mi-Sook Cho | 천세희 | Kim, Chang-suk | 2014, 14(5) | pp.689~694 | number of Cited : 3
    Abstract PDF
    Objectives : The study aims to verify the relationship between personality type and sense of vocation of the clinical dental hygienist. Methods : The study data was collected from 221 dental hygienists working in the City of Changwon(unified), BusanㆍGyeongsangnam-do. Data analysis was conducted using IBM SPSS Statistics 19.0 program. Results : The relationship between the general characteristics of the study population and a sense of vocation was higher for the dental hygienists with a higher level of education attainment, higher monthly salary, higher job satisfaction level, extroverted personality, and the dental hygienists in a low neurotic group(p<0.001). According to the correlation results among job satisfaction, personality type and the sense of vocation, a sense of vocation and job satisfaction have a positive correlation while the sense of vocation and neurotic tendency have a negative correlation(p<0.01). The results of logistic-regression analysis on the factors influencing the sense of vocation are as follows: education attainment(p<0.001), salary(p<0.05), extroversion(p<0.001) and neurotic tendency(p<0.05). Conclusions : Nature of consciousness, depending on the type of professional vocation was to determine the difference.
  • 12.

    Relationship of resilience and organizational commitment in dental hygienists

    Jo Myeong Suk | Lee, Seong-Sook | 김진희 | 2014, 14(5) | pp.695~701 | number of Cited : 9
    Abstract PDF
    Objectives : The purpose of this study was to investigate the relationship between the resilience and organizational commitment of dental hygienists for the improvement of organizational performance. Methods : A self-reported questionnaire was filled out by 323 dental hygienists from May 2 to June 5, 2014. The collected data were analyzed by a statistical package SPSS WIN 12.0. Results : The dental hygienists had the highest score in relationship(4.09), and had the lowest score in communicative competence(3.29). In organizational commitment, they had the highest score in affective commitment(3.20). There were statistically significant differences in that regard according to age(p<0.001), marital status(p<0.05) and career(p<0.001). The organizational commitment varied significantly with age(p<0.05) and career(p<0.01), and normative commitment significantly varied with the number of work days(p<0.05) and career(p<0.05). There was a significant correlation between the resilience and organizational commitment of the dental hygienists(p<0.001). Conclusions : The organizational commitment of the dental hygienists was better when they had a better resilience, and that resilience made a contribution to the improvement of organizational commitment in the clinical dental hygienists.
  • 13.

    Knowledge and attitude toward cardiopulmonary resuscita-tion in dental hygienists

    Jeong Kyung Yi | Ha,Myung-Ok | 2014, 14(5) | pp.703~713 | number of Cited : 12
    Abstract PDF
    Objectives : The purpose of this study is to investigate the knowledge and attitude toward cardiopulmonary resuscitation(CPR) in some dental hygienists. Methods : A self-reported questionnaire was filled out by 207 dental hygienists in Gwangju from February to March, 2014. The questionnaire consisted of knowledge and attitude toward CPR dental hygienists. The data were analyzed using IBM SPSS 19.0 program for chi-square test, independent t-test, one-way ANOVA and multiple regression analysis. Results : Dental hygienists having basic life support(BLS) provider accounted for 16.9%. CPR knowledge was 8.40 and attitude was 3.59 points. There were positive correlations between CPR knowledge and attitude including education, performance, and confidence(r=.231, r=.207, r=.377). In the regression analysis, attitude toward CPR confidence were positively associated with BLS provider certificate within two years. Conclusions : Dental hygienists had low level of knowledge and confidence toward CPR. It is important to educate BLS provider course to the dental hygienists.
  • 14.

    The Perception of elderly oral health care in the care workers in nursing homes

    Kim, Seol Hee | 김춘희 | Ga-Yeon Son and 3other persons | 2014, 14(5) | pp.715~721 | number of Cited : 10
    Abstract PDF
    Objectives : The purpose of the study is to investigate the perception of elderly oral health care in the care workers in nursing homes. Methods : A self-reported questionnaire was filled out by 200 care workers in nursing homes in Daegu and Busan. Data were analyzed by SPSS 18.0 program. Results : The oral health care was maintained by innately healthy mouth(49.5%), dentists(48.5%), public health centers including institution and dentistry(46.5%), regular visit to dentistry(44.0%), and ingestion of healthy food(38.5%). Fifty eight percent of the respondents(116 persons) agreed that regular and proper toothbrushing is the most important behavior to maintain the healthy teeth. The regular visit to dental clinics(Wald=7.076, p=0.008) and an oral care by specialist (Wald=5.210, p=0.022) influenced on elderly oral health status(p<0.05). Conclusions : The oral health care education is very important for the workers in the nursing homes that the education can improve the perception toward the elderly oral health.
  • 15.

    Oral health knowledge level on oral care and elder oral hygiene care of the nursing home staff in long-term care facilities

    김경민 | Park Young Nam | Lee Min Kyung and 4other persons | 2014, 14(5) | pp.723~730 | number of Cited : 11
    Abstract PDF
    Objectives : This research was conducted to investigate geriatric care workers' oral care, and the oral care conditions of residents of elder care facilities in relation to workers' knowledge of oral care. Methods : A survey was conducted from November 2011 to February 2012 with geriatric-care workers in elder care facilities located in Busan and other areas of Gyeongsangnam-do. Results : With regard to their oral self-care practices, 52.5% of the geriatric workers "brushed their teeth from top to bottom" and 58.1% brushed their teeth 3 times a day. Further, 52.0% did not use any oral care products, while 36.5% used Mouthrinese. The workers who brushed their teeth in their own ways or from top to bottom had significantly higher oral care knowledge scores than those who brushed from left to right (p< .05). Concerning oral hygiene care for residents, 72.6% of the geriatric workers recommended that elders visit dentists for oral care, 96.6% helped elders oral wash their teeth every day, and 54.7% used oral care products for the elders. The workers who did not recommend visits to dental clinics scored slightly higher than those who did (p< .05). Additionally, those who did not help elders oral wash their teeth scored significantly higher than those who did (p< .05). Except for oral wash to recuperated old man and recommendation of visiting the dentist, relation between oral care and knowledge about oral health and oral hygiene care is plus mutual relation. Conclusions : To manage the accuracy and quality of oral care work performed by geriatric care workers in elder care facilities, enhancing standard training and education on oral care is necessary. Providing systematic, regular education on such knowledge and practices would also be essential.
  • 16.

    Knowledge, practice, and awareness toward oral health in the special school teachers

    Kim Jung Hee | Yoo Jahea | 2014, 14(5) | pp.731~738 | number of Cited : 2
    Abstract PDF
    Objectives : The purpose of this study is to investigate the knowledge, practice, and awareness toward oral health in the special school teachers. Methods : A self-reported questionnaire was filled out by 133 teachers in special education schools in Seoul, Gyeonggi-do, Chungbuk, and Jeonbuk. Data were analyzed using the statistical package SPSS WIN 12.0 for frequency, t-test, one-way ANOVA, Scheffe test(post hoc test), and Pearson´s correlation coefficient. Results : In oral health knowledge, the average score of female teachers was 8.31 in comparison to 7.75 in male teachers(p<.05). In oral health practice, the average score of female teachers was 3.71 and that of male teachers was 3.69. In oral health awareness, the average score of female teachers was 4.12 and male teachers had 3.93. The teachers in special schools had a close positive correlation between oral health awareness and practice(r=.448, p<.05). Conclusions : The teachers tended to have better knowledge of oral health but they did not practice the oral health behavior. The teachers have the important role in oral health management for the disabled children by providing the right toothbrushing method.
  • 17.

    Relationship of Stress, Oral Habits and TMJ Symptoms in 20-30 ages Adults

    MINHEE HONG | 2014, 14(5) | pp.739~746 | number of Cited : 12
    Abstract PDF
    Objectives : The purpose of this study was to examine the relationship of stress symptoms, oral habits and temporomanbibular joint symptom among 20-30 ages adults. And it's also meant to investigate the direct and indirect influence of these factors by using a path model to determine their causal relationship. Methods : The subjects in this study were 287 selected 20-30 ages adults, on whom a survey was conducted from June 15 to July 10, 2014. The data were analyzed using SPSS 18.0(SPSS 18.0 K for window, SPSS Inc USA) and IBM SPSS Amos 18.0(SPSS Inc, Chicago, IL, USA). Results : There were significant differences in oral habits, TMJ symptoms and stress according to gender. There were significant differences in oral habits, TMJ symptoms, physical and psycho-emotional symptoms according to Systemic disease. And stress, physical, psycho-emotional symptoms, oral habits and TMJ symptoms were correlated to one another. Stress exerted a direct influence on physical, psycho-emotional symptoms, and psycho-emotional symptoms had a direct impact on physical symptoms, oral habits and TMJ symptoms. Physical symptoms exercised a direct influence on oral habits and TMJ symptoms, and oral habits affected TMJ symptoms in a direct way. physical, psycho-emotional symptoms and oral habits served as parameters that produced partial mediation effects, and the two factors had an indirect impact on TMJ symptoms. Conclusions : It's found that stress exerted direct and indirect influence on oral parafunction and TMJ symptoms. Like other diseases, oral habits and TMJ symptom that stem from stress is likely to lead to chronic diseases if the two are not noticed at the right time. Therefore individual people should try to get rid of stress in a manner to be appropriate for their own characteristics in order to maintain their oral health.
  • 18.

    The subjective recognition of halitosis in the elderly in some areas

    Young-soo LEE | 박화순 | 정정옥 | 2014, 14(5) | pp.747~755 | number of Cited : 1
    Abstract PDF
    Objectives : The purpose of the study is to investigate the appropriate prevention and management of halitosis and management for the elderly. Methods : A self-reported questionnaire was filled out by 320 elderly over 65 years old in Seoul and Gyeonggi from June to October, 2013. Except 28 incomplete answers, 292 copies were used for the analysis. Results : The correlation coefficient was 0.702 which was the degree of present halitosis and everyday halitosis. Elderly within 65-69 years old felt the halitosis very seriously. the level of halitosis felt everyday was also highest in those within 65-69 years old with mean 2.00±0.862 points. Conclusions : The dissemination of correct knowledge of halitosis management can improve the subjective perception of the elderly oral health care.
  • 19.

    The effect of subjective perception and attitude of oral health on the oral health impact profile in industrial accident injury patients

    Lee, Hea Shoon | kyung Hee Lee | 2014, 14(5) | pp.757~764 | number of Cited : 1
    Abstract PDF
    Objectives : The purpose of this study was to investigate the oral health impact profile (OHIP) in the industrial accident injury patients, and the effect of subjective perception and attitude of oral health on the oral health-related quality of life in industrial injury patients. Methods : A self-reported questionnaire was filled out by 496 industrial accident injury patients from October 29 to November 30, 2013. Data were analyzed using SPSS ver 20.0 program for chi-square test, t-test, ANOVA, Scheffe test, and Pearson’s correlation coefficient. Results : The OHIP-14 was higher oral health-related quality of life in young people, women, highly educated persons, and those having high income and frequent scaling service. The subjective perception and attitude of oral health was closely correlated to the OHIP-14. The factors influencing on the oral health-related quality of life were the subjective perception and attitude toward oral health. Conclusions : It is necessary to emphasize the oral health promotion program for industrial injury patients. The government should pay more attention to the policy for the improvement of the oral health of industrial accident injury patients in the future.
  • 20.

    Relationship between satisfaction of dental service, value quality, and reuse intention

    전지현 | Min Hee-Hong | Young-Suk Kim | 2014, 14(5) | pp.765~773 | number of Cited : 8
    Abstract PDF
    Objectives : The objective of study is to investigate the relationship between the satisfaction of dental service, value quality, and reuse intention among dental implant patients. Methods : A self-reported questionnaire was filled out by 316 dental implant patients in 4 dental clinics in Daejeon from December, 2013 to March, 2014. Results : The average of dental service satisfaction was 4.14(SD=.562). The average of value satisfaction was 3.88(SD=.648), and that of reuse intention was 3.98(SD=.662). The tangibility was defined as the influence of the quality of medical service on the value satisfaction(t=4.042, p<0.001) and the confidence(t=2.997, p<0.01). The influence of the service value on the intention to reuse was 0.486(t=10.796, p<.001) of path coefficient. Conclusions : The quality of medical service is decided by the value satisfaction and the intention to reuse including the value satisfaction.
  • 21.

    The protective effect of coenzyme Q10 on cytotoxicity of regin monomer of odontoblast caused by TEGDMA

    Ahreum Lee | 박소영 | kyung Hee Lee | 2014, 14(5) | pp.775~781 | number of Cited : 2
    Abstract PDF
    Objectives : The purpose of the study is to investigate the protective effect of coenzyme Q10 on cytotoxicity effect of dental monomers in odontoblast(MDPC-23). Methods : MDPC-23 was incubated with the(co)monomers triethylene glycol dimethacrylate (TEGDMA) with and without addition of coenzyme Q10. The cell proliferation and survival was determined using WST-1 assay. The level of reactive oxygen species(ROS) was measured by immunofluorescent staining for DCF-DA. Results : TEGDMA treatment decreased the cell proliferation by dose dependently(0.1, 1, 2.5, 5, 10 mM) on the growth of MDPC-23 cells. Coenzyme Q10 showed cell proliferation from 5 to 500 µM by WST-1 assay. Pre-treatment coenzyme Q10 showed the antioxidant effect on proliferation and viability of MDPC-23 after 48h(p<0.05). The positive cells were observed in non-coenyme Q10 treatment group(group 2) in comparison with coenyme Q10 pre-treatment group(group 1) by DCF-DA. The fluorescence positive cells showed 14.715(group 1) and 19.788(group 2) using image J system. Conclusions : TEGDMA induced cytotoxicity. The MDPC-23 cell death was associated with the increasing ROS. Coenyme Q10 showed the antioxidant effects by decreasing ROS. This effects may contribute to the treatment of periodontal disease induced by TEGDMA after operation.
  • 22.

    Effect of non-thermal atmospheric pressure nitrogen and air plasma on the surface properties and the disinfection of denture base resin

    서혜연 | 유은미 | Yu-Ri Choi and 3other persons | 2014, 14(5) | pp.783~788 | number of Cited : 4
    Abstract PDF
    Objectives : The purpose of this study was to investigate the effect of non-thermal atmospheric pressure plasma jet(NTAPPJ) on surface properties and Streptococcus mutans disinfection of denture base resin. Methods : Self-cured denture base resin (Jet denture repair resin, Lang dental Mfg, co., USA) was used to make specimen(12 mm × 2 mm). To observe surface change before and after plasma process, surface roughness and contact angle were measured. For sterilization experiments, the surfaces of specimens were treated with nitrogen and air NTAPPJ for 1 minute after S. mutans was inoculated on the material surfaces. Results : Before plasma process, surface roughness of denture base resin was 0.21 ㎛ ± 0.02 ㎛. After air and nitrogen NTAPPJ process, surface roughness was 0.19 ㎛ ± 0.03 ㎛ and 0.18 ㎛ ± 0.01 ㎛ respectively. There was no significant difference(p>0.05). Contact angle of control group without plasma process was 83.81゚ ± 3.14゚, while after plasma treatment, contact angles of air NTAPPJ and nitrogen NTAPPJ groups were 63.29゚ ± 2.27゚ and 46.68゚ ± 5.82゚ respectively. The result showed a significant decrease in contact angle after plasma process(p<0.05). Compared to the control group 6020.33(CFU/mL) without plasma process, CFU decreased significantly after air NTAPPJ 90.75(CFU/mL) and nitrogen NTAPPJ 80.25(CFU/mL) treatment(p<0.05). Conclusions : It was considered that NTAPPJ can be used for denture disinfection without changing surface properties of materials.