• 한국임상수의학회지
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• 제17권1호
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• pp.298-298
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• 2000

Seven years old male lion in Everland Zoo has three fractured canine tooth. To avoid the risk of a possible fracture with pulp exposure after restroration of largest abration defects, endodontic therapy was performed. The pulp chamber was filled with calcium hydroxide, zinc oxide cement and gutta percha. We also installed the Crown prosthesis was installed in fractured canine tooth to protect the tooth and to improve the cosmetics and function of the tooth. The lion could eat in one day and there were no any signs of dental problem. It is the obvious prophylactic procedure for wild animal is the inclusion of an oral examination at every opportunity to handle the animal. It is considered that crown prosthesis after endodontic therapy was useful for maintaining normal physiological function and for provention of additional fracture or complication.

• 대한치과의사협회지
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• 제18권9호통권136호
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• pp.739-745
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• 1980

The histologic responses of periapical tissues to root canal fillings with Grossman sealer were studied 10 dogs. Root canal fillings were performed on the 20 lower and upper teeth. The animals were sacrificed 1,2,3,4 and 5 weeks after the completion of operation. The following results were based on histopathologic studies; 1) After 1 week, the necrosis of dentin and cementum surrounding root apex was found in the root canal fillings. 2) After 2 weeks, the necrosis of cementum and surrounding alveolar bone were revealed. The resorption of dentin was appeared partially. 3) After 2 weeks, newly formed dentin was appeared surrounding necrotic dentin. 4) After 4-5 weeks, the osteoblastic activity was revealed abundantly surrounding the alveolar bone. 5) Fibrosis was prominantly appeared surrounding over-filled area, and fibrous encapsulation was performed.

• 대한치과보존학회:학술대회논문집
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• 대한치과보존학회 2001년도 추계학술대회(제116회) 및 13회 Workshop 제3회 한ㆍ일 치과보존학회 공동학술대회 초록집
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• pp.586.1-586
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• 2001

Large butt-joint box typed class II cavites with cervical margins 1mm below the cemento-enamel junction were cut into 70 extracted human molars. The cavities(7 groups, n=10) were filled using a closed/open sandwich restoration or total bond restoration technique with materials according to the manufacturer's recommandation using the single-component bonding agent for each system. Teeth were thermocycled 500 times between $5^{\circ}C$ and $55^{\circ}C$ with 30-second dwell times.(omitted)

• 한국치위생학회지
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• 제17권6호
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• pp.1215-1223
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• 2017

Objectives: The purpose of this study was to investigate the correlation between dietary calcium (Ca) and phosphorus (P) intake with DMFT (Decayed Missing Filled Teeth) among Korean schoolchildren. Methods: Data of 1,529 schoolchildren were derived from the Sixth Korean National Health and Nutrition Examination Survey, which was conducted from 2013 to 2015. Sociodemographic, oral health behavior, and dietary factors were collected as independent variables. The DMFT was used as a dependent variable. The chi-square test and logistic regression analysis were performed to identify the correlation between dental caries and the other variables. Results: Multiple logistic regression analysis showed that DMFT was correlated with sex, age, and daily P intake. Conclusions: Adequate intake of phosphorus may have a positive effect in preventing dental caries in schoolchildren. Therefore education on increasing phosphorus intake, including raised awareness through provision of dietary guidelines, will be needed.

• 한국임상수의학회지
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• 제19권2호
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• pp.253-255
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• 2002

A 10-year-old, female mixed breed dog and a 3-year-old, female chihuahua which had swelling below lower eyelid were refered to Veterinary Medical Teaching Hospital, Seoul National University. The plain maxillary oblique view revealed radiolucency at periapical area in maxillary fourth premolar. The 2 cases were diagnosed as periapical abscess by clinical sign and radiographs, and apicoectomies were performed for resetting the lesions and preserving the teeth. Under general anesthesia with isoflurane, periapical abscess was resected by burs and the defect was filled with zinc phosphate cement. Radiograph was perfomed at 1 week and 1 year after apicoectomy and there was no evidence of recurrence.

• Restorative Dentistry and Endodontics
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• 제2권1호
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• pp.7-9
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• 1976

This study was performed to reveal the effect of self-curing acrylic resin to dental pulp when the resin was used directly on the freshly cut dentin. Class V cavity preparations were made on the teeth of dogs with No. 701 carbide bur at a speed of 200,000 rpm and with an air water spray. Petrolatum jelly was coated on the inner surfaces of the cavities. After that, doughs of self-curing acrylic resin were filled in these cavities and before completely set these were removed and cemented with zinc oxide and eugenol cement. The dogs were sacrified between 1 day and 3 weeks at the intervals of one week and routinely processed with hematoxylin and eosin stain for histopathologic interpretation. The results were as followings; 1. The inflammatory changes of the pulp can be seen after the use of self-curing acrylic resin on freshly cut dentin. 2. The inflammatory changes of the pulp were not completely subsided until the end of third experimental week.

• 한국치위생학회지
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• 제14권4호
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• pp.519-526
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• 2014

Objectives : The purpose of the study is to investigate the relationship between employment stress and oral symptoms in health college students. Methods : A self-reported questionnaire was filled out by 275 health college students in Seoul from October 7 to November 29, 2013. The data were analyzed using SPSS WIN 14.0 program. Results : Female students tended to have higher employment stress oral symptoms than male. The higher the employment stress was, the more oral symptoms were. There was a close relationship between personal trait, environmental stress and oral symptoms. Regression analysis showed that tongue, teeth, gum, temporomandibular joint(TMJ) were influenced by the employment stress. Conclusions : It is important to reduce the environmental stress in the students. The students themselves must try to overcome the agonal condition by diverting stress into positive way of living.

• Safety and Health at Work
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• 제5권3호
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• pp.136-139
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• 2014

Background: Occupational injuries cause major health problems, which the developed, developing, and underdeveloped nations worldwide are facing today. The present study aimed to assess dental caries, periodontal health of stone mine workers, and the relationship between wasting diseases and the years of working experience. Methods: The study population comprised 510 men, selected based on the stratified cluster sampling procedure. Clinical oral examinations were carried out, and periodontal disease, dental caries, and wasting diseases were recorded. Results: Workers were in the age group of 17-56 years; the prevalence of dental caries in the workers was found to be 74%, with a mean decayed, missing, filled teeth index of 2.89. A periodontal pocket of more than 6 mm was observed in 6% of the workers. Conclusion: The oral health of mine workers is in a poor state; steps should be taken so as to provide basic medical and dental care facilities.

• 대한소아치과학회지
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• 제29권4호
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• pp.592-599
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• 2002

광중합형 복합레진 및 다양한 레진 접착제는 최근 소아의 유치 수복에 사용이 증가하고 있다. 본 연구는 유치의 복합레진 수복 시 중합방법과 접착제에 따른 미세누출의 차이를 실험적으로 관찰하고자 하였다. 탈락기에 있는 건전한 유전치 150개의 순면에 직경 1.6mm, 깊이 1.6mm의 와동을 형성하였다. 와동의 충전재로써 1종의 복합레진, 1종의 콤포머, 4종의 레진 접착제를 사용하였다. 중합 광원은 3종을 사용하였다. 충전이 완료된 각 시편은 Sof-Lex 폴리싱 디스크로 표면을 연마한 후 $5^{\circ}C$와 $55^{\circ}C$에 각 30초씩 계류시켜 1,000회 열순환하고 2% methylene blue 수용액에 넣어 색소를 침투시킨 후 저속 diamond cutter($Isomet^{TM}$, Buehler, USA)를 이용하여 순면을 근원심으로 절단하였다. 각 재료별 미세누출의 정도를 관찰하여 다음과 같은 결과를 얻었다. 1. 충전재 및 광중합 방법에 따른 미세누출을 측정한 결과, 콤포머를 사용한 5군에서 충전방법과 관계없이 가장 작았고, Clearfil SE bond를 Optilux 501로 중합한 군에서 가장 컸으나 통계적으로 유의한 차이는 아니었다(P>0.05). 2. 충전재에 따른 미세누출을 측정한 결과, 콤포머를 충전한 5군에서 $1{\sim}4$군의 복합레진 충전군에 비해 더 작은 미세누출을 보였다(P<0.05). 3. 광중합 방법에 따른 미세누출을 측정한 결과, Optilux 501을 사용한 군에서 가장 작았고, Flipo를 사용한 군에서 가장 컸으나 통계적으로 유의한 차이는 아니었다(P>0.05).

• 한국치위생학회지
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• 제10권6호
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• pp.1049-1059
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• 2010

Objective : The purpose of this study was to examine the relationship of the general characteristics of parents to their children's oral health care. The subjects in this study were 117 parents and their children who resided in rural communities in the region of K. Methods : A survey was conducted with the consent of the parents from July 1 to 30, 2010. As for the survey on the children, the children who were in the lower grades were interviewed, and the upper graders filled out the questionnaires in person. A frequency analysis was carried out to find out the general characteristics of the parents and children, and x2-test was utilized to grasp the links between the general characteristics of the parents and the children's oral health care. A SPSS WIN 12.0 program was employed to analyze all the collected data. The findings of the study were as follows: Result : 1. As a result of investigating the relationship of the occupation of the parents to the children's regular dental checkup, the 71.8 percent of the entire children didn't get a dental checkup on a regular basis. The biggest percentage of the children of the self-employed parents(100%) got a regular dental checkup, and 90.9 percent of the children of the government workers did that(p<.05). 2. As a result of checking the relationship of the occupation of the parents to the children's dental-caries experiences, 39.3 percent of the whole children had no such experiences. The largest percentage of the children of the company employees(51.9%) had dental-caries experiences(p<.05). 3. Concerning the links between the academic credential of the parents and the children's toothbrushing method, the biggest percentage of the children(40.2%) brushed their teeth up and down. The largest rate of the children whose parents were high-school graduates(41.5%) brushed their teeth in that way(p<.05). 4. Regarding the links between the toothbrushing time of the parents and the children's view, 43.6 percent found their parents to take good care of their teeth to make them clean. 60 percent whose parents brushed their teeth after having breakfast and dinner took the best view(p<.001). 5. As for the oral-health education experiences of the parents and a time for the children's change of toothbrushes, 29.1 percent changed their toothbrushes every two months, and 29.1 percent did that not on a regular basis but when the bristles of their toothbrushes got bent(p<.05). Conclusions : The above-mentioned findings suggest that in order to promote children's oral health in consideration of the characteristics of their parents, children should be urged to get a regular dental checkup, and the development of oral-health education programs in which parents and children can participate together is urgently required.