• 치위생과학회지
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• 제7권3호
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• pp.121-127
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• 2007

현 대학생의 구강보건에 관한 기본적인 지식과 관심 및 치위생과 및 비치위생과 학생의 구강건강인식을 비교 분석할 목적으로 2006년 6월부터 2007년 5월까지 조사를 실시하고, 비교 분석하여 다음과 같은 결과를 얻었다. 1. 구강보건에 관한 인식도를 살펴본 결과, 치위생과 학생의 구강보건 지식경로는 학교수업이 80.0%로 가장 많았고, 비치위생과 학생들의 경우에는 TV 또는 라디오의 건강프로그램이 42.7%로 가장 많았다. 구강위생을 유지해야 하는 이유에 대해서는 치위생과 학생들의 경우에는 치아우식증 예방이라고 응답한 경우가 80.9%로 가장 많았고, 비치위생과 학생들의 경우에는 치주질환 예방이 52.4%로 가장 많았으며, 치위생과 학생과 비치위생과 학생 간에 통계적으로 유의한 차이를 보였다(p < 0.001). 2. 치아우식증에 관한 인식도를 살펴본 결과, 치아우식증 예방법에 대해서는 치위생과 학생과 비치위생과 학생들 모두 규칙적인 잇솔질이 가장 많았고, 치아우식증의 발생원인에 대해서는 치위생과 학생과 비치위생과 학생들 모두 불충분한 잇솔질이 가장 높은 빈도를 나타냈으며, 치위생과 학생과 비치위생과 학생 간에 통계적으로 유의한 차이를 보였다(p < 0.001). 3. 불소에 관한 인식도에 대해 살펴본 결과, 불소인지 여부에 대해 치위생과 학생들은 불소를 알고 있는 경우가 93.6%로 나타났고, 비치위생과 학생들은 55.3%로 나타났으며, 불소의 치아우식 예방인지 여부에 대해 치위생과 학생들은 예방할 수 있다고 응답한 경우가 85.5%로 가장 많았고, 비치위생과 학생들은 잘 모르겠다가 51.0%로 가장 많았으며, 치위생과 학생과 비치위생과 학생 간에 통계적으로 유의한 차이를 보였다(p < 0.001). 4. 구강건강상태에 대한 인식도에 대해 살펴본 결과, 본인의 치아 상태에 대하여 치위생과 학생과 비치위생과 학생들 모두에서 보통이라고 응답한 경우가 가장 많았으며, 본인의 치아건강에 대한 관심도에 대해서는 치위생과 학생과 비치위생과 학생들 모두에서 "조금 있다"라고 응답한 경우가 가장 많았고, 치위생과 학생과 비치위생과 학생 간에 통계적으로 유의한 차이를 보였다(p < 0.001). 본인의 치아우식 발생 원인에 대해 치위생과 학생과 비치위생과 학생들 모두에서 불충분한 잇솔질, 당분 과다섭취 순으로 나타났다. 5. 구강진료의 인식도에 대해 살펴본 결과, 진료 시의 동통에 대해서는 치위생과 학생과 비치위생과 학생들 모두에서 견딜만한 정도와 극도로 아프다 순으로 나타났으며, 치과 진료시의 어려움에 대해서는 치위생과 학생들과 비치위생과 학생들 모두에서 비용, 두려움, 시간 순으로 나타났으며, 치위생과 학생과 비치위생과 학생 간에 통계적으로 유의한 차이를 보였다(p < 0.01). 치과방문 시의 느낌에 대해서는 치위생과 학생과 비치위생과 학생들 모두에서 다소걱정이다, 두렵다 순으로 나타났다.

• 치위생과학회지
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• 제11권6호
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• pp.535-542
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• 2011

본 연구는 청소년의 흡연 실태와 흡연 관련 구강건지식 수준을 파악하기 위하여 2011년 6월 14일부터 7월 12일까지 전라북도 익산시에 소재하고 있는 4개 중학교의 1, 2, 3학년 학생을 대상으로 편의표본추출법에 의한 자기기입식의 설문조사를 실시하여 1,219명의 설문지를 최종 분석에 사용하였다. 수집된 자료는 SPSS 12.0 프로그램을 이용하여 통계분석을 실시하였으며, 결과는 다음과 같다. 1. 흡연 학생은 10.6%였으며, 흡연 남학생이 16.0%, 흡연 여학생이 5.4%로 나타났다. 2. 흡연기간은 1년 미만이 51.6%로 가장 많았고, 평균 하루 흡연량은 10개피 미만이 91.9%였으며, 흡연동기로는 호기심이 52.8%로 가장 높았다. 3. 흡연 관련 구강건강지식수준은 평균 평점 0.85점 중 구취(0.95점), 구강암(0.94점), 치주질환(0.93점)에서 평균 이상으로 나타났으며, 충치(0.70점)와 미각 둔화(0.77)는 평균 이하로 나타났다. 4. 흡연구강건강지식수준은 1학년이 5.28점으로 가장 높았으며(p<0.01), 생활만족도가 높을수록 흡연 관련 구강건강지식수준이 높았다(p<0.05). 5. 니코틴의존도는 학년이 높을수록 높았고(P<0.01), 흡연 일수(${\beta}=0.407$, p<0.001)와 흡연기간(${\beta}=0.235$, p<0.01)이 니코틴의존도에 영향을 미치는 것으로 나타났다.

• 한국치위생학회지
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• 제11권3호
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• pp.325-341
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• 2011

Objectives : This research has investigated the reality of the education of the claim and the degree of the education for the claimed of the dentistry recuperation organization in the Daejeon and Chuncheong are for the improvement of the problem in the medical expenses. Methods : It use as a basic data for the vitalizations of the education and performed the survey in the dentistry recuperation organization in the Daejeon and ChungCheong Nam BukDo which are registered in the evaluating organization for judging the health insurance in the present May 2010, and concluded just like the below. Results : 1. The education of the claim in the requirer in the dentistry recuperation organization, and the education of the claim was especially lacking when the dentist was studying in the university, and the dental hygienist had the similar educational experience in the school and the clinic (p<0.05) 2. Most of the requirer in the dental recuperation organization was hoping to get the education related to the claim work, but the dentist and the nurse's aid was relatively low (p<0.05) 3. For fixing the error of the claim, the participation and the extension of the judging standard of the insurance was the highest among the university subordinate dental hospital/dental hospital, but the health center was relatively low (p<0.05). 4. The dentist feels the economic burden in employing the special employee because the raising of the special judging people, compared to others, but the staffs such as the dental hygienist preferred it as one of ways to fix the error of the claim of the dental insurance (p<0.05) 5. Both dentists and the dental hygienist said proper time to teach the insurance was all needed in the school, and the clinic, but other workers relatively believed it should be held in the clinic (p<0.05). 6. The important factors to decide the participation of the lecture was in order of the contents of the lecture, the place of the lecture, the amount for the lecture, the superintendent of the lecture, whether it has gone through the educational score, and whether it has passed the conserving educational score was relatively less important in the university subordinate dentist/dentist, but the medical center was very effective as 4.50 (p<0.05) 7. Health Insurance Review and assessment service was very high as the managing department for supplying the lecture and the information, 70.5%, and the next was the Korean Dental Association/ Korean dental hygiene association, but dentists were preferring the association to manage in than the Health Insurance Review and assessment service to manage (p<0.05) 8. In preferring lecture for the inquiring the insurance, periodontal surgery was the highest as 4.51, the diagnosis standard for injection was high in the university subordinate hospital/dentists, and the more the year of the insurance inquiry, the less the doctor who was hoping for the lecture about the basic treatment. Conclusions : Taken together, it is decided that the inquiry education about the medical expense in the dentist, so the consistent and systematic education should be held to the related people, and from this, it is thought to reduce the problem of the inquiry of the medical expenses by fostering the knowledge and supplying the information which are related to the inquiry of the dentists.

• Journal of Periodontal and Implant Science
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• 제45권6호
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• pp.223-228
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• 2015

Purpose: The goal of this study was to characterize the patterns of antimicrobial resistance and virulence genes in samples of Staphylococcus aureus (S. aureus) isolated from periodontitis patients. Methods: From July 2015 to August 2015, oral saliva was collected from a total of 112 patients diagnosed with periodontitis, including 80 outpatients in dental hospitals and 32 patients in dental clinics located in Seoul and Cheonan. The samples were subjected to a susceptibility test to evaluate the prevalence of antimicrobial resistance, and the pathogenic factors and antimicrobial resistance factors in the DNA of S. aureus were analyzed using polymerase chain reaction. Results: A susceptibility test against 15 antimicrobial agents showed that 88% of cultures were resistant to ampicillin, 88% to penicillin, and 2% to oxacillin. Resistance to at least two drugs was observed in 90% of cultures, and the most common pattern of multidrug resistance was to ampicillin and penicillin. Enterotoxins were detected in 65.9% of samples. The cell hemolysin gene hld was detected in 100% of cultures and hla was detected in 97.6% of samples. All strains resistant to penicillin and ampicillin had the blaZ gene. The aph(3')IIIa gene, which encodes an aminoglycoside modifying enzyme, was detected in 46.3% of samples. Conclusions: In the treatment of oral S. aureus infections, it is important to identify the pathogenic genes and the extent of antimicrobial resistance. Furthermore, it is necessary to study patterns of antimicrobial resistance and cross-infection in the context of periodontological specialties in which antimicrobials are frequently used, such as maxillofacial surgery, where the frequency of antimicrobial use for minor procedures such as implant placement is increasing.

• 대한치과보철학회지
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• 제42권2호
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• pp.125-132
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• 2004

Statements of problem: All ceramic fixed partial denture cores can be made by the slip casting method and the advanced alumina tape method. The fracture resistance of these core connector areas is relatively low. Purpose: The purpose of this study is to standardize the appropriate volumetric figure and location of the connectors in the alumina core fabricated in alumina tape to be used in fixed partial dentures by way of topology optimization. Material and method: A maxillary anterior three-unit bridge alumina core with teeth form and surrounding periodontal apparatus model was used to ultimately design the most structurally rigid form of the connector. Loadings from a $0^{\circ}$, $45^{\circ}$ and $60^{\circ}$ to the axis of each tooth were applied and analyzed with the 3-D finite element analysis method. Using the results from these experiments, the topology optimization was applied and the optimal reinforcement layout of connector was obtained and the detail shape in the fixed partial denture core was designed. Results: The modified prosthesis with the form of a bulk in the lower lingual surface of the connector in the event, reduced the stress concentration up to 20% in the 3-D FEA. Conclusion: The formation of a bulk in the lower lingual connector area of an alumina core for a fixed partial denture decreases the stress to a clinically favorable measure but does not harm the esthetic point of view. This result illustrates the possibility of clinical application of the modified form designed by the topology optimization method.

• Journal of Periodontal and Implant Science
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• 제38권4호
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• pp.595-602
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• 2008

Purpose: Ti-6Al-4V alloy is widely used as an implant material because of its good biocompatibility and good mechanical property compared with commercial pure titanium. Otherwise, toxicity of aluminum and vanadium in vivo has been reported. Ti-8Ta-3Nb alloy is recently developed in the R&D Center for Ti and Special Alloys and it was reported that this alloy has high mechanical strength, no cytotoxicity and similar biocompatibility to commercial pure titanium, but many studies are needed for its clinical use. In these experiment, we carried out different surface treatment on each Ti-8Ta-3Nb alloy disks, then cultured cell on it and assessed biological response. Materials and Methods: cpTi, Ti-6Al-4V, Ti-8Ta-3Nb alloy disks were prepared and carried out sandblasting and acid etching (SLA) or alkali-heat treatment (AH) on the Ti-8Ta-3Nb alloy disks. We cultured primary rat calvarial cells on each surface and assessed early cell attachment and proliferation by scanning electron microscopy, cell proliferation, alkaline phosphatase activity. Result: The rates of cell proliferation on the cpTi, Ti-8Ta-3Nb AH disks were higher than others (p<0.05) and alkaline phosphatase activity was significantly enhanced on the Ti-STa-8Nb AH disks(p<0.05). Conclusion: Most favorable cell response was shown on the Ti-8Ta-3Nb AH surfaces. It is supposed that alkali-heat treatment of the Ti-8Ta-3Nb alloy could be induced earlier bone healing and osseointegration than smooth surface.

• 한국치위생학회지
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• 제4권2호
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• pp.255-263
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• 2004

One of the best way to prevent dental caries and periodontal disease is removing dental plaque. Toothbrushing is also one of the crucial ways to gel rid of dental plaque and improve dental hygiene. The purpose of th is study was to examine how many bacteria were attached to toothbrushes used by dental palque acidogenecity and related behaviors to toothbrush use. Subjects in this study were 30 college students in their twenties, on whom a survey was conducted to find out how they cleansed their toothbrushes, how long they cleaned toothbrushes after brushing, and how to keep them. And then dental palque acidogenecity by caries activity test was implemented and the number of bacteria attached to their toothbrushes was tested. The findings of the study were as follows : 1. Concerning correlations between dental palque acidogenecity and the number of remaining bacteria in the toothbrushes used by students, the number of bacteria was lower in the group of students with no caries activity than in the group with mild caries activity. 2. As for relations between the way of cleansing toothbrushes and the number of bacteria, there was no statistically significant gap between the group of students who wetted their toothbrushes with water and rubbed the heads of them and the group of students who just only wetted their toothbrushes with no further actions. 3. Regarding the relationship of toothbrush cleansing time to the number of bacteria, the number of bacteria was lower in the group of students who cleansed their toothbrushes for 15 seconds or more. 4. As to the influence of the number of toothbrush used by students, there was no significant difference between the group using just one toothbrush and the other group using two or more toothbrushes. 5. As for correlations between the way of keeping toothbrushes and the number of bacteria, no significant gap existed between the group thai kept their toothbrushes separately and the other that didn't.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2009년도 추계학술발표논문집
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• pp.946-948
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• 2009

본 연구는 우리나라 청소년의 치주건강상태와 구강건강인식 및 행태간의 연관성을 파악하여 구강건강향상을 위한 방안을 제시하고자 하며, 청소년 치주질환 예방 프로그램의 기초자료를 제공하는데 목적을 두었다. 연구문제의 검증을 위해 2006년도 국민구강건강실태조사의 원시자료를 활용해이중 구강검진과 학생용 면접기록지를 동시에 수행한 만 12~18세의 청소년 총 5,192명을 대상으로 하였다. 분석결과, 청소년의 치주건강상태를 성별, 연령별로 보면, 남자가 여자에 비해, 또한 연령이 많아질수록 치주건강상태가 나쁜 것으로 나타났다(P<.0001). 성별과 연령을 보정한 후 치주건강상태와 구강건강 인식 및 행태와의 관련성을 보면 주관적 구강건강인식이 좋지 않은 청소년이 좋은 청소년에 비해 불건 강한 치주조직군에 속할 가능성이 1.7배 높았고[Odds Ratio(OR)=1.74; p<0.001], 구강건강행태 변수 중 점심식사 후 잇솔질을 하지 않는 청소년은 잇솔질을 하는 청소년에 비해 불건강한 치주조직군에 속할 가능성이 1.6배 높았다(OR=0.1.59; P<0.001). 한편 구강건강행태 변수 중 1일 간식횟수는 치주조직의 건강상태와 통계적으로 유의하였으나, OR 값이 1보다 낮았다[1일 간식횟수가 4회 이상(OR=0.61; P<0.001), 2~3회(OR=0.58;P<0.001), 1회(OR=0.71;P<0.001)]. 끝으로 청소년의 구강건강 행태 변화를 통해 구강건강을 향상시킬 수 있음은 물론 청소년의 치주질환예방 및 관리프로그램 계획시 올바른 구강건강행태를 가지도록 하는 것의 중요성을 암시하고 있다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 추계학술대회
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• pp.128-128
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• 2018

Nypa fruticans wurmb (NF) has been used as traditional medicinal food in Asian countries. Especially, NF has been used for conventional medicine to treat inflammatory periodontal diseases. Previous studies have been shown that NF has large amount of useful constituents such as phenolic acids, polyphenols and flavonoids. Also, NF is known as having medicinal effects such as anti-oxidant, anti-inflammatory and cholesterol-lowering effects. NF has recently been attracted to use complementary medicinal food on inflammatory diseases in Korea. However, there are no obvious effects in inflammatory and metabolic diseases also mechanisms has been studied yet. The purpose of this study was to investigate the anti-inflammatory effects of NF and steamed-NF (SNF), which recently has been used as health food, using Human keratinocyte cell line (HaCaT) and Human mast cell line (HMC-1). The cytotoxicities of NF and SNF were measured by using MTT assays in HaCaT cells and HMC-1 cell. To evaluate anti-inflammatory effects of NF and SNF, HaCaT cells were stimulated with tumor necrosis factor $(TNF)-{\alpha}$ and Interferon $(IFN)-{\gamma}$. Also, HMC-1 cells were stimulated with phorbol-12-myristate-13-acetate (PMA) and A23187 calcium ionophore (A23187) to induce allergic inflammation. Inflammatory cytokine were measured by enzyme-linked immunosorbent assay (ELISA). In this result, the extract of NF and SNF (0.01 - 1mg/ml) did not show cytotoxicity in HaCaT cells and HMC-1 cells. In addition, the NF and SNF suppressed the production of interleukin (IL)-6 and IL-8 in HaCaT cells at highest concentration. Furthermore, the treatment of SNF significantly inhibited the secretion level of IL-8 in PMA plus A23187-stimulated HMC-1 cells compared with NF treatment group. These results suggest that the extract of NF and SNF may serve as a potential therapy for skin inflammatory diseases.

• 대한치과보철학회지
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• 제32권3호
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• pp.368-377
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• 1994

In order to investigate the oral health status including dental erosion, the authors had surveyed and oral examined 510 male workers, among whom 199 workers were exposed to acids and 311 were not exposed to acids, in a factory using acids during the period from November, 26 to 27 in 1992. The obtained results were as follows ; 1. The positive rate of dental erosion between the acid exposed and non-exposed group didn't show statistical difference. But the positive rate of degree 1 dental erosion by degree was statistically high in the acid exposed group(P<0.05). 2. The acid exposed group showed the higher positive rate of degree 1 dental erosion in lower incisors by site(P<0.01). 3. To the average number of eroded teeth, the acid exposed group showed more degree 1 eroded teeth in lower incisors than the non-exposed(P<0.05). 4. Although the rate of dental erosion was increased according to the increase in tenure in both exposed and non-exposed group(P<0.05), there was no difference in rate of the dental erosion by site among the same tenure group. 5. In the acid exposed group, the rate of dental erosion between protective mask wearer group and non-wearer group was not statistically different, but upper incisors of the protective mask wearer group showed lower rate of dental erosion by site(P<0.05). 6. The positive rate of periodontal diseases was higher in the acid exposed group(P<0.01).