• Imaging Science in Dentistry
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• 제43권4호
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• pp.219-225
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• 2013

Purpose: The purpose of this study was to determine the prevalence of missing and impacted third molars in people aged 25 years and above. Materials and Methods: The study sample of 3,799 patients was chosen randomly from patients who visited Pusan National University Dental Hospital and had panoramic radiographs taken. The data collected included presence and impaction state, angulation, and depth of impaction of third molars, and radiographically detected lesions of third molars and adjacent second molars. Results: A greater percentage of men than women retained at least one third molar. The incidence of third molars decreased with increasing age. The incidence of partially impacted third molars greatly declined after the age of 30. Vertically impacted maxillary third molars and horizontally impacted mandibular third molars were most frequent in all age groups. Among the maxillary third molars, those impacted below the cervical line of the second molar were most frequent in all age groups, and among the mandibular third molars, deeply impacted third molars were most frequent in those aged over 40. Dental caries was the most common radiographic lesion of the third molars. Mesioangularly impacted third molars showed radiographic lesions in 13 (9.5%) adjacent maxillary second molars and 117 (27.4%) mandibular second molars. Conclusion: The number of remaining third molars decreased and the percentage of Class C depth increased with age. Caries was the most frequent lesion in third molars. Partially impacted mesioangular third molars showed a high incidence of caries or periodontal bone loss of the adjacent second molar. Regular oral examination will be essential to keep asymptomatic third molars in good health.

• 대한소아치과학회지
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• 제29권3호
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• pp.318-327
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• 2002

뇌성마비인의 구강위생상태에 관한 조사를 위하여 $3{\sim}48$세의 뇌성마비인 총264명(남153명, 여111명)과 비교군으로 비슷한 연령대의 비뇌성마비인 220명(남125명, 여95명)을 대상으로 구강검사를 시행하고, 우식경험유치율(dft rate), 우식경험유치지수(dft index), 우식경험영구치율(DMFT rate), 우식경험영구치지수(DMFT index), 치태지수(plaque index)를 산출하여 비뇌성마비인과 비교하였으며, 지적, 행동, 언어장애의 정도, 유형 및 이환 부위, 거주형태, 보호자의 직업에 따라 분류, 비교하여 다음과 같은 결과를 얻었다. 1. DMFT rate, DMFT index, dft index에서 뇌성마비군과 비뇌성마비군의 유의한 차이가 없었고, dft rate는 유의한 차이로 뇌성마비군이 높게 나타났다. 2. 뇌성마비군의 성별, 유형 및 이환 부위별 비교에서 우식경험도의 유의한 차이를 보이지 않았다. 3. DMFT rate와 DMFT index는 각각의 장애의 정도가 심할수록 유의성 있는 차이로 감소하였으며, 거주형태에서는 수용군이 비수용군에 비해 낮았고, 보호자 직업에서는 자영업이 낮게 나타났다. 4. 치태지수에서 뇌성마비군이 비뇌성마비군보다 유의성 있게 높았고, 거주형태에서는 비수용군이, 보호자 직업에서는 스스로 벌어서 생활하는 경우가 유의성 있는 차이를 보이며 높게 나타났다. 5. 치태지수에서 뇌성마비군의 성별, 유형 및 이환 부위, 각각의 장애의 정도에 대해서는 유의한 차이를 보이고 있지 않았다.

• 한국식품위생안전성학회지
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• 제14권1호
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• pp.22-26
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• 1999

The purpose of this experiment was to examine the antimicrobial effect of the natural flavonoid hesperidin on dental caries and alveolar bone resorption in the albinorats. Twenty five day old male rats were fed with the experimental diets for 42 days. At the end of the 42 day experimental period, the molar tooth occlusal surface was examined by a dissecting microscope. The sulcular caries lesions were recorded: the first molar caries incidence was higher than that of the second molar and the third molar. Alvelolar bone resorption was measured on the buccal and lingual aspects of each molars. Three measurements were taken on the first molar (mesialpoint, midpoint, distalpoint). The results of this experiments, showed that hesperidin is effective in reducing dental caries and alveolar bone resorption.

• 치위생과학회지
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• 제12권2호
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• pp.79-84
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• 2012

본 연구는 일부 치위생과 학생들의 식생활일지를 통한 우식성식품의 섭취빈도 및 청정식품 등의 식이섭취 실태를 조사하여 식이섭취 요인과 치아우식증과의 관련성을 연구하여 구강보건향상 및 교육지침 개발에 유용한 기초 자료로 활용하고자 2011년 6월 경기도에 소재한 S대학 치위생과 여대생을 대상으로 5일간의 식생활일지를 기록하게 하여 기록의 누락이 없는 66명의 식생활 일지를 선정하여 본 연구에 사용하여 다음과 같은 결론을 얻었다. 1. 식품섭취실태 조사 결과 우식성식품 섭취횟수는 12.82회, 우식발생가능시간은 256.36분, 청정식품 섭취횟수는 8.32회, 총간식 섭취횟수는 14.21회, 우식성간식 섭취횟수 8.70회, 1일 평균 우식간식 섭취횟수 1.74회로 나타났다. 2. 구강내 치아우식증 존재 여부에 따라 우식성식품 섭취횟수, 청정식품 섭취횟수, 우식성간식 섭취횟수는 우식집단이 비우식집단보다 높게 나타났으나 통계적으로 유의한 차이를 보이지 않았다. 3. 식이섭취실태와 우식치아의 상관관계에서는 우식성식품 섭취횟수가 증가할수록 청정식품의 섭취 횟수와 총간식 섭취횟수도 증가하는 것으로 나타났으나 우식치아와의 상관성은 나타나지 않았다. 이상의 결과로 보아 식이섭취 조사를 통한 방법으로만 치아우식증의 발생정도와 원인을 찾고 해석하는 것은 치아우식증이 다인성 질환이라는 점을 볼 때 많은 제한점이 나타나지만, 우식성식품의 섭취횟수와 청정식품의 섭취횟수, 총간식 섭취횟수는 서로 관련성을 가지고 있는 것으로 음식의 섭취횟수의 증가는 치아우식이 생길 가능성이 있음을 예측할 수 있었고 추후 더 많은 대상자를 이용한 연구가 시행되어 식이요인과 다른 여러 요인에 의한 치아우식의 영향요인을 연구할 필요가 있다고 사료된다.

• 대한치과의사협회지
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• 제11권10호
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• pp.643-647
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• 1973

The auther has made the oral examination of 523 pregnant women-such as calculus, gingival disease, periodontal disease, and dental caries-who visit the dental department and obstetric department in National Medical Center in Seoul. After the above studies, results of the changes of the pregnant women's oral condition are following. 1. In creasing of calculus deposition due to the changes of saliva components. 2. Increasing of incidence of gingival and periodontal and pathological changes followed by calculus deposition. 3. Incidence of new cavities are not related to the pregnancy, but old cavities have become more progressive in dental caries.

• 대한치과의사협회지
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• 제23권7호통권194호
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• pp.617-624
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• 1985

• 한국산학기술학회논문지
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• 제17권2호
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• pp.233-239
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• 2016

본 연구는 국민건강영양조사 제6기 원시자료에서 검진조사로 실시된 구강검진 항목의 치아우식증과 건강 설문조사로 실시된 칫솔질 시기를 묻는 문항을 활용하여, 치아가 나기 시작해서 영구치가 완성되는 1-13세의 유아동을 대상으로 하루 중 칫솔질 시기와 치아우식증 상태를 비교 분석하였다. 연구결과로 우식경험영구치가 많을수록, 영구치우식경험을 한 경우일수록 칫솔질 시기 전반적으로 칫솔질 실천율이 높게 나타났고, 통계적으로 유의한 차이를 보였다. 또한 점심식사 후 칫솔질 실천율이 낮은 집단에서 전반적으로 치아우식증이 높게 나타났다. 이는 과거의 우식경험으로 인한 경험적 산물로 칫솔질에 강한 동기부여를 준 것으로 나타났다.

• 대한소아치과학회지
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• 제23권2호
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• pp.389-400
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• 1996

In Class II amalgam restoration in deciduous molar, failure rate and incidence of recurrent caries are high as children become older. In order to preserve deciduous molars till the physiologic exfoliation time, stainless steel crown is a choice of the treatment. As a result of a careless treatment, such as overhanging margin, poor marginal adaptation, poor proximal contour and inadequate mesiodistal width give rise to interfering eruption of the adjacent teeth, recurrent caries and chronic gingival irritation and insufficient arch length respectively. In this study, 252 s.s. crowned teeth extracted due to physiologic exfoliation or periapical lesion. The purpose of this study is to analyze the marginal adaptation of stainless steel crown to the deciduous molar in order to obtain better clinical result. The results were as follows : 1. Between the length of s.s. crown and the marginal gap of crown, positive correlations were shown. 2. Largest amount of marginal gap was shown at buccal side in upper deciduous molars and lower first deciduous molar, lingual side in lower second deciduous molar. But no significant diffrence were found statistically compared to second most largest one. 3. Incidence of exposed restoration and recurrent caries were higher in proximal surface than buccal/lingual surface. And extension of restoration below the margin of s.s. crown gives rise to higher rate of recurrent caries. 4. Defect of contour was found in 34%, frequently found in lower 1st deciduous molar and upper 1st deciduous molar. 5. Marginal polishing defects were found in 23%. 6. Ledge was formed in 10% especially in lower 1st deciduous molar and lower 2nd deciduous molar. 7. 16% of the teeth had wear facet due to traumatic occlusion, 7% of them had occlusal perforation.

• Journal of Korean Academy of Oral Health
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• 제42권4호
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• pp.136-144
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• 2018

Objectives: The aim of this study is to analyze the differences in factors related to the incidence of dental caries between children in fluoridated and non-fluoridated areas and compared the DMFT and DMFS scores to confirm the effect of water fluoridation program (WFP) in Geoje and Changwon. Methods: The oral health examination and questionnaire survey were conducted in fluoridated and non-fluoridated areas. The number of surveyed children aged 8, 10, and 12 years in the fluoridated and non-fluoridated area of two cities was 1,524 and 1,383, respectively. Self-recorded questionnaires included self-perception of their own dental health, daily toothbrushing frequency, intake frequency of cariogenic sweet snacks and beverages, experience of gingival bleeding, experience of unmet dental treatment, and use of oral hygiene device except for toothbrush and toothpaste. The prevalence of caries and fissure-sealant status were surveyed. The logistic regression analysis was used to analyze the difference in children's self-rated oral health status between the fluoridated and non-fluoridated area. The mean number of sealed teeth and surfaces, marginal means of the DMFT and DMFS scores adjusted for the difference in the samples' sex distribution, and region were compared between the fluoridated and non-fluoridated areas. Results: In the fluoridated area, the experience rate of unmet dental treatments was higher among children aged 10 years, intake frequency of cariogenic sweet snacks and beverages were higher among the whole sample, and experience rate of professional fluoride application were lower than in the non-fluoridated area. The DMFT score for permanent dentition adjusted for differences in sex, region, and mean number of fissure-sealed teeth in the fluoridated area was significantly lower among whole samples and 8-, 10-, and 12-year-olds alone than in the non-fluoridated area. Conclusions: WFP can alleviate oral health inequality because it is effective in reducing the incidence of caries among children is disadvantaged demographic, socioeconomic, and cultural contexts.

• 한국치위생학회지
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• 제15권1호
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• pp.119-127
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• 2015

Objectives: The purpose of the study is to investigate the relationship between dental caries and oral health behaviors in middle and high school students by web-based survey of the ninth(2013) Korean youth risk behavior. Methods: The subjects were 75,149 students from 400 middle schools and 400 high schools. Finally, the survey participation rate was 96.4%(72,435 students from 799 schools) by complex sample design. The questionnaire consisted of general characteristics of the subjects, oral health behaviors, and oral health status. General characteristics included gender, types of schools, economic condition, and residential types. Oral health behaviors included subjective oral health condition, frequency of tooth brushing, tooth brushing after meal within recent 7 days, sealant within 12 months, fluoride application within 12 months, scaling within 12 months, and oral health education experience within 12 months. Oral health condition included dental caries incidence within 12 months. Results: Oral health behavior influenced on dental caries in the middle and high school students in Korea. This study showed the relationship between the sociodemographic characteristics, tooth brushing frequency, sealant experience, dental caries and halitosis experience, and scaling within 12 months. Scaling is the best prevention method for dental caries and halitosis in the students. Conclusions: The study showed the necessity for practical oral health education and the effect of fluoride application for dental caries prevention.