• The Journal of Advanced Prosthodontics
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• 제7권6호
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• pp.468-474
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• 2015

PURPOSE. The aim of this study was to characterize and compare bacterial diversity on the removable partial denture (RPD) framework over time. MATERIALS AND METHODS. This descriptive pilot study included five women who were rehabilitated with free-end mandibular RPD. The biofilm on T-bar clasps were collected 1 week ($t_1$) and 4 months ($t_2$) after the RPD was inserted ($t_0$). Bacterial 16S rDNA was extracted and PCR amplified. Amplicons were cloned; clones were submitted to cycle sequencing, and sequences were compared with GenBank (98% similarity). RESULTS. A total of 180 sequences with more than 499 bp were obtained. Two phylogenetic trees with 84 ($t_1$) and 96 ($t_2$) clones represented the bacteria biofilm at the RPD. About 93% of the obtained phylotypes fell into 25 known species for $t_1$ and 17 for $t_2$, which were grouped in 5 phyla: Firmicutes ($t_1=82%$; $t_2=60%$), Actinobacteria ($t_1=5%$; $t_2=10%$), Bacteroidetes ($t_1=2%$; $t_2=6%$), Proteobacteria ($t_1=10%$; $t_2=15%$) and Fusobacteria ($t_1=1%$; $t_2=8%$). The libraries also include 3 novel phylotypes for $t_1$ and 11 for $t_2$. Library $t_2$ differs from $t_1$ (P=.004); $t_1$ is a subset of the $t_2$ (P=.052). Periodontal pathogens, such as F. nucleatum, were more prevalent in $t_2$. CONCLUSION. The biofilm composition of the RPD metal clasps changed along time after RPD wearing. The RPD framework may act as a reservoir for potentially pathogenic bacteria and the RPD wearers may benefit from regular follow-up visits and strategies on prosthesis-related oral health instructions.

• 한국융합학회논문지
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• 제9권4호
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• pp.99-110
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• 2018

저자들은 2008년부터 2016년까지 고대의료원 구로병원 예방치과 구취클리닉에 내원한 구취 환자 중, 생리적 구취증 환자 171명에 대한 진료기록을 통하여 구취에 영향을 줄 수 있다고 인정되는 11개 독립변수들의 자료를 수집하였다. 이들 11개 독립변수들과 3개 종속변수들 중, 생리적 구취 발생에 융복합적 영향을 미치는 공통요인을 추출하여, 향후 구취 예방을 위한 구강보건교육자료 제작 등에 활용할 목적으로 본 연구를 시작하였다. 생리적 구취 발생과 밀접한 연관성이 있다고 알려진 안정 시 타액량, 타액 완충능, 타액 침전율의 3개 종속변수에 11개 독립변수들이 미치는 영향력을 다중회귀분석과 경로분석을 이용하여 분석하였고, 각 변수들의 기술통계적인 결과 분석과 함께, 3개 종속변수에 통계적으로 유의하게 직접, 간접적으로 영향을 미치는 공통적인 융복합적 독립변수 요인들을 추출한 결과, 성별, 식음규칙성, 성격, 조식섭식습관의 네가지 요인이 추출되었다.

• 치위생과학회지
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• 제6권2호
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• pp.113-117
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• 2006

양산시 초등학교 중 2000년부터 2005년까지 5년간 0.2% 불화나트륨용액으로 매주 1회 불소용액양치를 한 초등학교를 대상으로 구강검사를 하고 전산통계분석으로 각종 구강보건지표를 비교 분석한 후 5년간 불소용액양치사업의 효과를 검토한 결과, 다음과 같은 결과를 얻었다. 1. 2000년 전체아동 영구치우식경험자율은 평균 58.4%이었고, 2005년 전체아동 영구치우식경험자율은 평균 48.3% 이어서 5년간 불소용액양치사업을 실시한 결과 평균 10.1%가 낮았다. 2. 2000년 전체아동 우식영구치지수는 평균 2.46개이었고, 2005년 전체아동 우식영구치지수는 평균 1.70개이어서 0.2% 불화나트륨으로 5년간 불소용액양치사업을 실시한 결과 평균 0.76개가 적었다. 3. 2000년 전체아동 충전영구치지수는 평균 0.55개이었고, 2005년 전체아동 충전영구치지수는 평균 0.37개로 0.2% 불화나트륨으로 5년간 불소용액양치사업을 실시한 결과 평균 0.18개가 적었다. 4. 2000년 우식경험영구치지수는 평균 2.61개이었고, 2005년 우식경험영구치지수는 평균 1.64개이어서 5년간 불소용액 양치사업을 실시한 결과 평균 0.97개가 적었다. 5. 전체아동의 평균 구강위생관리능력지수는 2000년 12.12점이었고, 2005년 5.95점으로 5년간 불소용액양치사업을 실시한 결과 평균 6.17 낮았다. 이상의 결과를 종합하여 볼 때, 수돗물불소농도조정사업을 실시하지 않는 지역에서 치아우식증을 예방을 위해 유치원생부터 중학생까지 모두 불화나트륨용액으로 양치를 하도록 교육청의 적극적인 지원과 관심이 요망되었다.

• 대한치과의사협회지
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• 제50권9호
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• pp.544-551
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• 2012

Dental caries is a biofilm-related oral disease, and continues to afflict the majority of the world's population. Although fluoride, delivered in various modalities, remains the mainstay for the prevention of caries, additional approaches are required to enhance its effectiveness. Natural products have been used as a major source of innovative and effective therapeutic agents throughout human history, and have shown promise as a source of components for the development of new drugs. In addition. studies using natural products to prevent or treat oral diseases such as dental caries have received a great deal of attention. A number of compounds, such as epicatechin, allicin and sanguinarine, isolated from natural products, have also been investigated for their efficacy against oral microbial pathogens. However, the use of natural products as an anti-caries agent in clinical practice was controversial because of inadequate knowledge concerning their mechanisms of action and chemical characterization. This study focuses on the current knowledge of natural products in dental caries prevention and suggests natural products are importance sources for the prevention of dental caries.

• Journal of Periodontal and Implant Science
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• 제23권1호
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• pp.193-200
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• 1993

The purpose of this study is to investigate the relationship between occurrence and inducing factors of herpes labialis developed after periodontal therapy and to suggest prediction model of this lesion. A total of 100 patients were studied. A standard schedule was used for interviews of patients. It included demographic information, patient and familial history of recurrent aphthous ulcer and recurrent herpes labialis, history of systemic disease, religion, and emotional state. In case of female patients, the association of dysmenorrhea and onset of recurrent herpes labialis was also observed. After periodontal therapy, some details about therapy, such as the kind of therapy, location, spending time were recorded. At next appointment, the appearance and location of herpes labialis were examined. The frequency of herpes labialis after periodontal therapy was 8% and the location was predominantly mouth angle. The significant relationship was found between the onset of herpes labialis and the history of recurrent herpes labialis, surgical therapy rather than non-surgical therapy, and spending time. The prediction model of herpes labialis was not apparently established with the results of this study. In conclusion it is suggested that we should minimize traumatic manipulation and treatment time to prevent the onset of herpes labialis after periodontal therapy.

• 보건교육건강증진학회지
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• 제24권4호
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• pp.149-159
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• 2007

This study was intended to provide basic data for developing an oral health management program for diabetic patients by understanding their oral health condition and defining the influence of diabetes on oral health. The following results were obtained through intraoral examination and questionnaire surveys done on one hundred and twenty two diabetic outpatients who visited endocrine department at Yeungnam University in Daegu and internal medicine department at Chungmu hospital in Cheonahn for 4 months from November, 2005 to February, 2006. DMF index according to the gender was significantly higher in females only in Filling index (p <0.05). Missing index increased as the age increased (p <0.001). Papillary bleeding index was significantly higher in females (p <0.05). Several indices which show oral status significantly higher as the duration of diabetes increased and as the blood sugar level before meal was higher (p <0.01, p <0.05). In a group that received oral hygiene education, several indices which show periodontal status were significantly lower than those in a group that didn't have it (p <0.001). According to the results, not only diabetic control but also general oral care should be included in self-management education for diabetic patients and this should be accomplished by appropriate oral health education program and staffs.

• 한국치위생학회지
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• 제14권3호
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• pp.425-430
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• 2014

Objectives : The purpose of this study is to investigate the correlation between amalgam restorations and urinary mercury levels in children for 1 year. Amalgam restoration has been widely used for over 200 years. But released mercury from amalgam can increase the concentration of mercury in the body. Methods : The subjects were 463 elementary school children. Oral examination, urine sampling, and questionnaire survey were performed at baseline and after 1 year. Results : Amalgam restoration increased the urinary mercury level to $0.55{\pm}0.13{\mu}g/g$ creatinine. In the regression analysis, variation of urinary mercury excretion were positively associated with amalgam surfaces and fish consumption. Conclusions : Small amount of mercury release from amalgam restoration was closely associated with increasing urinary mercury level.

• 대한치과의사협회지
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• 제44권10호통권449호
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• pp.647-657
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• 2006

By organizing the results of study questioned 1,620 dentists working nationwide in 2005, we concluded the followings. 1. The smoking rate of dentist is 29.69%. 2. 60.9% of current dentist smokers responded that they started smoking at the age of 20-24, during their dental school ages. 3. 67.41% of respondents have no idea of cyber antismoking campaign launched by Korean Dental Association, and 94.07% of respondents didn t receive formal education about smoking cessation. 4. 59.01% of respondents want to educate patients about smoking cessation in dental clinics but couldn t help putting it off for practical reasons. The reasons include their busy office hour(36.30%), difficulties in collecting proper smoking cessation documents(25.10%), and lack of their own knowledge in renunciation of smoking. (18,83%) 5. As dental healthcare personnels, they agreed with their status and duty of leading role in national renunciation of smoking. (R>80%) 6. 83.34% of dentists agreed that if educational antismoking program is arranged by Korean Dental Association, they should receive the education.

• Asian Pacific Journal of Cancer Prevention
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• 제16권12호
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• pp.4997-4999
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• 2015

Advanced oral squamous cell carcinoma (SCC) is a possible risk factor for myiasis, a parasitic infestation of vital tissue of humans or other mammals by dipterous larvae (maggots). Oral myiasis is a rare entity, and is mostly associated with various medical and anatomical conditions, such as neglected mandibular fracture, lip incompetence, cerebral palsy, poor oral hygiene, suppurative lesions, and cancerous wounds. Larvae cause itching and irritation due to their crawling movements and can destroy vital tissues, inducing serious or even life-threating hemorrhage. The aim of the present article was to highlight the occurrence of oral myiasis in association with squamous cell carcinoma and also to highlight the treatment and preventive approaches for such cases. A literature search was performed using MEDLINE for articles published in English relating to the occurrence of oral myiasis in oral SCC. Our search revealed 6 reports on myiasis associated with oral SCC. The surgical debridement of infected tissue with the removal of maggots is the treatment of choice in most cases of oral myiasis.

• 한국치위생학회지
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• 제16권6호
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• pp.955-968
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• 2016

Objectives: The purpose of the study was to investigate the oral health behavior according to perceived oral symptoms in the elderly. Methods: The data were obtained from the 6th Korean National Health and Nutrition Examination Survey (2013). Data were analyzed by complex sample frequency t test, one-way ANOVA, ${\chi}^2$ test, and general analysis. The questionnaire consisted of general characteristics of the subjects and perceived oral symptoms. Results: Those who had higher education tended to brush teeth regularly. The use of oral hygiene product was also high in higher educated elderly and higher income. Those with good oral health perception showed regular toothbrushing habit. Those with good chewing and mastication used oral hygiene products. Male tended to have regular dental checkup. Those having spouse, higher income, younger age, regular dental checkup had good chewing ability. Poor oral health perception, toothache, and chewing difficulty were the main cause of dental visit (p<0.05). Conclusions: The elderly with poor perceived oral symptoms showed lower level of oral hygiene care. They tended to visit dental clinics only when they had oral symptoms.