• Journal of the korean academy of Pediatric Dentistry
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• v.27 no.1
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• pp.70-76
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• 2000

Congenital biliary atresia with progressive sclerosis of the intra- and extra-hepatic duct system occurs in 1 : 10,000 live births, and has a poor prognosis with an expected survival of less than 5 years. Etiology of biliary atresia is unclear, however, it is believed a genetic or developmental cause. The clinical characteristics include pronounced jaundice, hepatosplenomegaly, pruritus, steatorrhea, xanthomas, growth retardation, portal hypertension, bleedings, ascites and respiratory infections. Oral manifestations have seldom been reported in patients with biliary atresia, but there may be enamel hypoplasia, delayed tooth eruption, and green teeth. Early diagnosis and surgical intervention have decreased morbidity. returned growth and development to normal and improved the prognosis for survival. Authors report the clinical and radiologic characteristics, proper managements about two cases with biliary atresia.

• Restorative Dentistry and Endodontics
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• v.25 no.2
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• pp.254-261
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• 2000

본 연구에서는 35개의 구치부 2급 와동에 고밀도 구치부 복합레진(Surefil, Caulk, U.S.A.)을 수복하였다. 단일 충전군은 18개 치아의 인접면 와동을 한꺼번에 충전한 후 광중합하였고 분할 충전군은 17개 치아의 인접면 와동을 두 층으로 나누어 충전 및 광중합하였다. 6개월 후의 임상검사 결과 다음과 같은 결론을 얻었다. 1. 기초검사에서 단일 충전군과 분할 충전군 모두 색상조화도(Color match)를 제외한 다른 검사 항목들에서 Alfa로 나타났다. 2. 단일 충전군은 6개월 후 모든 검사(색상 조화도 제외)에서 인접면 접촉도(Proximal contact), 변연부 변색(Marginal discoloration), 술후 과민증(Postoperative sensitivity) 검사에서 소수의 치아가 Bravo, Charlie로 나타났으나 기초 검사와 3개월 후 검사 사이에 통계적으로 유의한 차이는 보이지 않았다. 3. 분할 충전군은 6개월 후 시행된 모든 검사(색상 조화도 제외)에서 인접면 접촉도(Proximal contact), 술후 과민증(Postoperative sensitivity) 검사에서 소수의 치아가 Bravo, Charlie로 나타났으나 기초 검사와 6개월후 검시 사이에 통계적으로 유의한 차이는 보이지 않았다. 4. 모든 검사항목에서 단일 충전군과 분할 충전군을 비교한 결과 통계적으로 유의한 차이는 보이지 않았다. 따라서 고밀도 구치부 복합레진(Surefil, Caulk, U.S.A)은 색상 재현의 어려움을 제외하고는 여러 평가에서 우수하게 나타났으므로 본 연구 결과를 기준으로 보면 이전 복합레진의 단점이 보완되어 구치부 2급 와동에 적절하게 사용될 수 있다고 사료되며 단일 충전군과 분할 충전군 사이에 통계적으로 유의한 차이를 보이지 않으므로 시술 시간을 좀 더 단축시킬 수 있을 것으로 사료된다.

• Journal of the korean academy of Pediatric Dentistry
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• v.24 no.3
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• pp.511-517
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• 1997

Tooth discoloration detracts from one's appearance and influences self-image and it is particularly true in children. Therefore, pediatric dentists are required to treat tooth discoloration manifested in children for the normal development of their psycosocial health. Three treatment modalities are currently availabler for the removal of a variety of intrinsic stains from vital teeth. These are enamel microabrasion technique using hydrochloric acid, office bleaching and home bleaching technique with carbamide. Microabrasion technique has several advantages over bleaching in that it is easy to accomplish and does not require multiple office visits or the expensive instruments and the color change seems to be permanent after treatment. The process relies on decalcification, a softening with HCl and then removal of the enamel containing the stain with rubbing. Due to the mechanism of stain removal, this method is indicated for the removal of superficial enamel stains or disc oloration only. We report four successfully treated cases by enamel microabrasion using 15% HCl and pumice. Entire clinical steps are described in detail with some discussions on the outcome.

• The Journal of Korea Assosiation for Disability and Oral Health
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• v.3 no.1
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• pp.17-21
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• 2007

Alagille syndrome is an autosomal dominant genetic disorder and occurs in approximately 1 in 100,000 live births. Diagnostic criteria was established by Alagille. It is mainly caused by a mutation in the Jagged1 gene. Major clinical features of this syndrome are paucity of intrahepatic bile duct with cholestasis, characteristic facies, cardiac murmur, defects of vertebrae, and embryotoxon. And minor clinical features are mental retardation, renal involvement, growth retardation, other skeletal abnormalities, a high-pitched voice. The surviving prognosis of Alagille syndrome patients depends on the severity of cardiovescular malformation in the early ages of infant. However, with the increasing years, it depends on the severity of the liver disease. Cholestasis causes congenital jaundice, malnutrition and growth retardation. Also, the increase of serum cholesterol level cause xanthoma and pruritus. Even though the severity of these problems are reduce with age, there is cases where there is no way but liver transplantation. For oral features of Alagille syndrome patients, green discoloration of entire dentition, induced by bilirubin infiltration into dentinal tubules, is especially. Also, xanthoma on gingiva and partial hypodontia have been reported. This report is on the oral features of an Alagille syndrome patient who visited to Kyung-Pook University Hospital.

• Journal of Dental Rehabilitation and Applied Science
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• v.32 no.3
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• pp.149-157
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• 2016

Tooth preparation design is essential for successful laminate veneer treatment. Preservative tooth preparation limited on enamel, supra-margin advantageous for plaque control, and maintaining contact points known as a standard concept. However, the tooth preparation design has been the controversial issue. In biomechanical considerations, the incisal coverage should be decided on esthetic needs and necessity for the anterior guidance reconstruction. In occasion for sufficient enamel thickness, preparation can prolong to the palatal side but not recommended at palatal concavity. Elongation to contact point is selective option according to the cases. If an old resin restoration located at contact area, laminate veneer should cover over half area of that after surface treatment. The laminate veneer can be also selected at a partially discolored tooth root canal therapy (RCT) and at this occasion, the fiber-reinforced composite (FRC) posts are recommended.

• Journal of the korean academy of Pediatric Dentistry
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• v.21 no.2
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• pp.593-598
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• 1994

There were two cases of esthetic improvement of discolored teeth. First case was 12-year-old girl whose upper right central incisor was discolored after traumatic injury. She was treated by walking bleaching technique. Endodontic retreatment was done, and then the mixture of Superoxol and sodium perborate was applied and changed every week. After 3 weeks, esthetic result was obtained and fracture site was rcovered with light-curing composite resin. Second cases was 11-year-old girl whose teeth were discolored by fluorosis. She was treated by vital bleaching technique. A resin splint was made and then 30% and 15% carbamide peroxide was applied using this splint. After 4 weeks, a noticeable improvement in the color and the brightness of the teeth was achieved.

• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.7
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• pp.701-706
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• 2016

The difference of oral environment improvement effect of the test dentifrice was examined by applying the Centella Asiatica extract on the oral dentifrice composed by above ingredients. And by using the double blind manner the plaque, gingival index and probing pocket depth were measured and the corresponding changes were set to be verified.

• The Journal of the Korean dental association
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• v.34 no.12 s.331
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• pp.855-860
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• 1996

치과용 복합레진은 bis GMA형의 monomer가 개발되고, 무기 filler가 첨가되어 물리적인 성질이 더욱 향상되었으며, 또한 법랑질에 대한 산부식법을 통하여 치아에 대한 결합력을 높을 수 있는 방법이 도입되면서 치과용 수복물로서 각광을 받아 왔다. 특히 복합레진은 이전까지 이용되었던 silicate cement 이나 acrylic resin에 비하여 변색이 적고, 원래의 형태를 비교적 잘 유지하는 장점을 가져서 전치부의 수복에 유용한 재료로 인식되었다. 복합레진을 이용한 전치부의 수복은 비교적 적은 치질의 삭제만으로도 가능하고, 심미적으로도 우수한 결과를 보이고 있어서 올바른 술식을 통하여 적절히 이용한다면 좋은 임상적인 결과를 얻을 수 있는 것이 사실이지만 재료학적인 한계가 아직 까지는 엄연히 존재한다. 복합레진을 이용한 전치부의 수복에 있어서, 복합레진의 문제점과 이를 줄이기 위한 방법, 임상시의 주의점 등에 관해 살펴보도록 한다.

• Restorative Dentistry and Endodontics
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• v.37 no.2
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• pp.119-122
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• 2012

Regenerative endodontics has a potential to heal a partially necrotic pulp, which can be beneficial for the continued root development and strengthening of immature teeth. For this purpose, triple antibiotic mixture of ciprofloxacin, metronidazole, and minocycline was recommended as intracanal medicament in an attempt to disinfect the root canal system for revascularization of a tooth with a necrotic pulp. However, discoloration of the tooth was reported after applying this. This case shows the idea for preventing the tooth discoloration using a delivery syringe to avoid the contact between the clinical crown and the antibiotics.

• Journal of the korean academy of Pediatric Dentistry
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• v.30 no.3
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• pp.423-430
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• 2003

The teeth bleaching with bleaching agent is widely used at recent times. Until yet the exact mechanism of the bleaching agent isn't known but it is thought that is by the complex reduction-oxidation reaction of the decomposed free radical from bleaching agent through various ways. In other words, it is supposed that the teeth are whitened by agent's changing chemical structures of stain-causing materials. The purpose of this study is to exam the change of the dentinal character by bleaching agent and to evaluate the safety of this agent. For this study, after applying 10% carbamide peroxide to enamel of human premolar for 6 hours a day for 2 weeks we examined changes of surface morphology, microhardness, composition and contents of minirals in human dentin using SEM, microhardness tester, FT-Raman spectrometer and EPMA and got following results. There was no significant difference in surface morphologic change when we examined the effect of 10% carbamide peroxide which penetrated into dentin after applied on enamel surface comparing with result from specimen in distilled water No change was shown on the surface of peritubular and intertubular dentin within the nanometeric range. The microhardness between bleached teeth and teeth stored in distilled water showed no statistically significant difference FT-Raman spectra of dentin exhibited no change of the component in human dentin. Only the least change in peaks of organic and inorganic materials were detected in Raman intencity. The total content of mineral elements in dentin with no treatment, stored only in distilled water and stored in distilled water after bleaching were $98.73{\pm}1.89,\;98.56{\pm}2.11\;and\;97.47{\pm}2.51$ respectively. Also they showed no statistically significant difference. From above results, the effect of 10% carbamide peroxide bleaching on structure of dentin is very low and the results may confirm the safety of this bleaching agent.