• Restorative Dentistry and Endodontics
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• 제25권3호
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• pp.321-337
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• 2000

Dental caries, one of the most frequent dental disease, become larger because it can be thought as a simple disease. Further more, it can progress to unexpected root canal therapy with fabrication of crown that needs reduction of tooth structure. Base is required in a large caries and ZOE, ZPC, glass ionomer are used frequently as base material. They, with restorative material, can affect the longevity of the restoration. In this study, we assume that the mandibular 1st molar has deep class I cavity. So, installing the 3 base material, 3 kinds of fillings were restored over the base as follows; 1) amalgam only, 2) amalgam with ZPC, 3) amalgam with ZOE, 4) amalgam with GI cement, 5) gold inlay with ZPC, 6) gold inlay with GI cement, 7) composite resin only, 8) composite resin with GI cement. After develop the 3-dimensional model for finite element analysis, we observe the distribution of stress and temperature with force of 500N to apical direction at 3 point on occlusal surface and temperature of 55 degree, 15 degree on entire surface. The analyzed results were as follow : 1. Principal stress produced at the interface of base, dentin, cavity wall was smallest in case of using GI cement as base material under the amalgam. 2. Principal stress produced at the interface of base, dentin, cavity wall was smaller in case of using GI cement as a base material than ZPC under gold inlay. 3. Composite resin-filled tooth showed stress distributed over entire tooth structure. In other words, there was little concentration of stress. 4. ZOE was the most effective base material against hot stimuli under the amalgam and GI cement was the next. In case of gold inlay, GI cement was more effective than ZPC. 5. Composite resin has the small coefficient of thermal conductivity. So, composite resin filling is the most effective insulating material.

• 대한치과의사협회지
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• 제53권10호
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• pp.688-695
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• 2015

Purpose: The institutionalized elderly have placed the most vulnerable state, and the report about the oral health status of the institutionalized elderly was scarce. The aims of the current study were to investigate the oral health status of institutionalized elderly. Materials and methods: The survey of the oral health status was carried out on 487 institutionalized elderly from 4 longterm care facilities of Seoul metropolitan city, Gyunggi province, and Gangwon province in Korea. Results: The prevalence of dental caries, root caries, and dental calculus of the institutionalized elderly was 19.2%, 15.3%, and 23.7%, respectively. The percentage of edentulism among the institutionalized elderly was 26.2%. Those who had poor oral hygiene and tongue coating were 43.9% and 90.5%, respectively. The percentages wearing complete and removable partial denture on maxilla were 12.8% and 3.3%, respectively. The percentages wearing complete and removable partial denture on mandible were 7.8% and 5.6%, respectively. The percentages of institutionalized elderly needing complete and removable partial denture on maxilla were 29.7% and 27.2%, respectively. The percentages of institutionalized elderly needing complete and removable partial denture on mandible were 24.5% and 30.9%, respectively. Conclusion: The oral health stuatus of institutionalized elderly was poor. For the oral health promotion of elderly in longterm care facilities, it is essential to educate nurses and caregivers about the importance of the oral health and oral hygiene method.

• 대한소아치과학회지
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• 제34권3호
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• pp.370-382
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• 2007

본 연구는 정상인과 정신지체인의 치아우식증과 이와 관련된 다양한 요소들을 비교 평가하고자 정상인 63명과 정신지체장애인 31명을 대상으로 우식경험지수, 치태지수를 조사하고, Dentocult 키트를 이용하여 뮤탄스 연쇄상구균과 유산간균의 분포정도와 타액의 완충능을 측정하고, ELISA(효소면역분석법)를 이용하여 타액의 면역항체 IgA와 뮤탄스 연쇄상구균-특이 IgA 농도를 측정하였다. 우식경험 영구치면지수와 치태지수는 정신지체인에서 정상인에 비해 유의하게 높았다. 타액 항체 IgA 농도는 두 군간에 차이를 나타내지 않았으나 뮤탄스 연쇄상구균 특이-IgA 농도는 정상인에서 유의하게 높았다. 완충능은 정신지체인에서 정상인에 비해 더 낮았으며, 뮤탄스 연쇄상구균 수와 유산간균 수는 두 군간에 유의한 차이는 없었다. 연령별 비교시 우식경험 영구치면지수와 치태지수는 15-18세군에서 정신지체인이 정상인에 비해 높았다. 뮤탄스 연쇄상구균 수와 유산간균 수는 9-11세군에서는 정신지체인보다 정상인에서 더 높았으나 12-14세군부터는 정신지체인에서 더 높은 양상을 보였다. 15-18세군에서 치아우식경험치면수는 완충능과 역상관관계를 보이고, 치태지수, 뮤탄스 연쇄상구균, 유산간균과 상당한 상관성을 보였다. 이상의 연구결과를 통해 정신지체인은 나이가 증가할수록 정상인보다 우식경험치면수가 많았고, 치태가 많았으며, 뮤탄스 연쇄상구균과 유산간균의 수가 많고, 타액의 완충능과 뮤탄스 연쇄상구균 특이-IgA 농도가 낮음을 알 수 있었다.

• Childhood Kidney Diseases
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• 제11권1호
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• pp.100-105
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• 2007

Cockayne 증후군은 지능저하와 발육부전을 특징으로 하며 피부의 광과민성, 색소성의 망막증, 백내장, 신경전도성 귀머거리 외에 다기관 이상을 동반하는 드문 질환이다. 신장학적 이상 소견 또한 드물지 않게 동반되는 합병증 중 하나이며 병리학적으로 사구체의 유리질화, 세뇨관의 위축 및 간질 내 섬유화가 관찰될 수 있다. 저자들은 7세된 남아에서 Cockayne 증후군의 특징적인 외모와 임상양상을 확인하고 동반된 국소 분절성 사구체 경화증을 진단하였기에 문헌 고찰과 함께 보고하는 바이다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제32권2호
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• pp.168-173
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• 2006

The side effects of head and neck radiation therapy include mucositis, xerostomia, loss of taste, radiation caries, oral infection, osteoradionecrosis and trismus. When a patient is arranged to begin head & neck radiotherapy, oral pathologic lesions are examined and managed for the prevention of oral complications. The advanced odontogenic infection should be especially controlled before the radiotherapy and the patient must be instructed for proper oral prophylaxis. Generally the more conservative treatments, such as, scaling, restoration, endodontic treatment, are the care of choice and dental extraction is performed in advanced periapical and periodontal pathologic conditions. If the dental extraction should be done, the radiotherapy consequently will be delayed until there is epithelium covering the extraction socket, leaving no exposed bone. The cancer patient with severe emotional stress pray for the early radiation therapy, in spite of possibility of the recurrent odontogenic infectious lesions. So, the authors attempted to do the early radiation therapy by the conservative endodontic drainage and surgical incision & drainage without extraction of the infected teeth, and resulted in relatively good prognosis without the severe side effects of head and neck radiotherapy.

• Imaging Science in Dentistry
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• 제39권2호
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• pp.61-68
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• 2009

Purpose : The purpose of this study was to develop the radiographic technique for detecting the demineralization which is known as indication of dental caries. Materials and Methods: This technique was based on the comparing of multiple radiographs which was irradiated by multiple X-ray spectra. For the meaningful comparing, the multiple radiographs were reconstructed to the dosimetrically consistent images using a standard material. The difference of resulting images of same target with multiple spectra represents the difference of response of material as regards the spectra. Results : We have found about 10% of demineralization of dental hard tissues particularly in the proximal region through the analyzing of differences. Conclusion: Most intriguing thing in this investigation was that the method to analyze difference shows us to an anatomic structure of dental hard tissues even if absolute values of optical density were excluded during the procedures. (Korean J Oral Maxillofac Radiol2009; 39: 61-8)

• 한국치위생학회지
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• 제14권2호
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• pp.163-171
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• 2014

Objectives : This study aims to improve health and the quality of life of teenagers by identifying an association between the periodontal status and oral health behaviors of Korean teenagers using 2010 Korean National Oral Health Survey data. Methods : Subjects were teenagers aged from 12 to 15 in Korean National Oral Health Survey (KNOHS). The questionnaire consisted of periodontal status, general characteristics, periodontal related factors, and oral health related behaviors. Results : Gingival bleeding was found in 56.9% of teenagers because unhealthy periodontal status and tartars were found. Those who were 15 years old had unhealthier periodontal status than those who aged 12 years old. Those who lived in rural areas tended to have worse periodontal status than those who lived in the big cities. Access to dental floss, mouth rinsing solution and regular dental checkup tended to make the healthier periodontal status. Smokers had the worse periodontal status than the nonsmokers. Conclusions : The oral health care in the teenagers aged from 12 to 15 is very important because the permanent dentition is completed in this stage. It is necessary to lay emphasis on the oral health improvement and dental caries prevention program to the teenagers.

• Journal of Dental Anesthesia and Pain Medicine
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• 제20권1호
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• pp.49-53
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• 2020

Cri-du-chat syndrome (CdCS) is caused by the deletion of the short arm of chromosome 5. Most patients with CdCS develop intellectual disabilities. Therefore, they have poor oral hygiene and a high caries index. However, treating such patients is not an easy task, because of the difficulty in communication. General anesthesia may be a useful option in adult patients with CdCS and intellectual disability. General anesthesia should be administered very carefully, owing to the presence of comorbid diseases, which may need airway management. Infants with CdCS need general anesthesia if they have a concomitant cardiac anomaly. Intubation is reportedly difficult for such patients was, owing to the structural and functional abnormalities in the larynx and vocal cords. The purpose of this study was to report a case of difficult intubation while inducing general anesthesia in a patient with CdCS during dental treatment, due to a narrow larynx and trachea.

• 대한치과의사협회지
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• 제50권6호
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• pp.322-328
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• 2012

Ectopic eruption of the permanent first molar is defined as the eruption of the tooth in an abnormal position or orientation. It may causes distal root resorption and premature exfoliation of the adjacent primary second molar and uncontrolled space loss is followed. Prolonged partial impaction of the permanent molar may also cause undetected caries or abscess formation of the neighbor teeth. The purpose of this paper is to provide a brief review regarding the etiology, classification, and different management techniques for correcting ectopic eruption of permanent first molar.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제41권4호
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• pp.198-202
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• 2015

Proliferative periostitis is a rare form of osteomyelitis that is characterized by new bone formation with periosteal reaction common causes of proliferative periostitis are dental caries, periodontitis, cysts, and trauma. While proliferative periostitis typically presents as a localized lesion, in this study, we describe an extensive form of proliferative periostitis involving the whole mandibular ramus and condyle. Because the radiographic findings were similar to osteogenic sarcoma, an accurate differential diagnosis was important for proper treatment.