• 대한소아치과학회지
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• 제28권1호
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• pp.12-15
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• 2001

치아만곡은 조직-형태분화기에 나타나는 치아형태의 이상으로 석회화된 부위와 미석회화된 부위간의 장애로 인해서 치관 및 치근 모두에서 발생하는 기형이며, 상악 절치에서 호발하며 매복 가능성이 높다고 보고되었다. 만곡의 원인으로는 유치의 외상 치배의 이소성 발육, 낭종이 있으며 그외에 otodental syndrome, Hurler syndrome, 쇄골두개이골증에서 보고되었다. 본 증례는 치아우식증으로 인해서 발생된 치근단병소가 치아만곡을 유발할 수 있는 원인이 될 수 있다고 생각하였기에 이에 보고하는 바이다.

• 대한치과의사협회지
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• 제55권7호
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• pp.489-496
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• 2017

Oral and maxillofacial cyst is defined as an pathogenic cavity with an lining epithelium and connective tissue wall. Cysts of the jaws and periapical regions vary in histogenesis, treatment and prognosis. Cysts with similar clinical and radiographic can be shown different histopathologic features. Cysts are classified into odontogenic cysts and nonodontogenic cysts. Cysts are also divied into true cysts and pseudocyst. True cysts are lined with an epithelium, however pseudocysts are not lined with epithelium. A periapical cyst, dentigerous cyst and odontogenic keratocyst is clinically common and important lesions at dental clinic.

• Imaging Science in Dentistry
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• 제46권4호
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• pp.229-237
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• 2016

Purpose: The aim of this article is to review a group of lesions associated with periodontal ligament (PDL) widening. Materials and Methods: An electronic search was performed using specialized databases such as Google Scholar, PubMed, PubMed Central, Science Direct, and Scopus to find relevant studies by using keywords such as "periodontium", "periodontal ligament", "periodontal ligament space", "widened periodontal ligament", and "periodontal ligament widening". Results: Out of nearly 200 articles, about 60 were broadly relevant to the topic. Ultimately, 47 articles closely related to the topic of interest were reviewed. When the relevant data were compiled, the following 10 entities were identified: occlusal/orthodontic trauma, periodontal disease/periodontitis, pulpo-periapical lesions, osteosarcoma, chondrosarcoma, non-Hodgkin lymphoma, progressive systemic sclerosis, radiation-induced bone defect, bisphosphonate-related osteonecrosis, and osteomyelitis. Conclusion: Although PDL widening may be encountered by many dentists during their routine daily procedures, the clinician should consider some serious related conditions as well.

• 대한치과보존학회:학술대회논문집
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• 대한치과보존학회 2006년도 Spring Scientific Meeting(the 125th) of Korean Academy of Conservative Dentistry
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• pp.234-234
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• 2006

• Restorative Dentistry and Endodontics
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• 제39권3호
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• pp.230-234
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• 2014

This study describes the treatment of an immature permanent tooth with periapical lesion which was treated with regenerative approach using platelet rich plasma (PRP). The root canal of immature human permanent tooth with periapical lesion was gently debrided of necrotic tissue and disinfected with 2.5% NaOCl, and then medicated with triple antibiotic paste comprised of ciprofloxacin, metronidazole, and tetracycline. When the tooth was asymptomatic, PRP and mineral trioxide aggregate (MTA) were placed into the root canal. Six months after PRP treatment, radiographical examination revealed resolution of the radiolucency and progressive thickening of the root wall and apical closure. Our findings suggest that PRP can be used for the treatment of immature permanent teeth with periapical lesion, as part of a regenerative endodontic treatment procedure.

• Restorative Dentistry and Endodontics
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• 제21권1호
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• pp.121-135
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• 1996

Actinomyces are Gram-positive, non-acid-fast, anaerobic or microaerophilic filamentous bacteria. These organisms are frequently detected from infected root canals and periapical lesion. The purpose of this study was to use indirect immunofluorescence to determine the prescence of select Actinomyces species in a survey of teeth associated with periapical lesion, to clarify the relationship between clinical symptoms of periapical lesions and the Actinomyces species and to study on the cross reaction among Actinomyces. Actinomyces israelii serotype I (ATCC 12102), Actinomyces israelii serotype II (ATCC 29322), Actinomyces viscosus serotype II (ATCC 19246), Actinomyces naslundii serotype I (ATCC 12104) were cultured in anaerobic condition. Rabbit antisera were prepared by intravenous injection of formalized whole cells. Indirect immunofluorescence method was used to achieve the purpose. The following results were obtained. 1. There was a relationship between Actinomyces and periapical disease. 2. A. israelii serotype I, II were frequently identified with Indirect Immunofluorescence and most often assosiated with periapical disease. In culture finding, there was no significant difference between each group. 3. Indirect Immunofluoresence is both more sensitive and more rapid than culture for identification of Actinomyces species in patients with periapical lesion. 4. A. israelii serotype I, II was highly isolated in infected root canals with local swelling, A. naslundii serotype I was highly isolated in those with foul odor, and A. israelii serotype I was found in higher frequncy in those with exudate than other bacteria. 5. In the Indirect Immunofluorescence (1 : 320), A positive cross reaction was obtained between A. israelii serotype I and A. israelii serotype II, also, A. viscosus serotype II and A. naslundii serotype I. There was no cross reaction between A. israelii serotype I, II and A. viscosus serotype II, A. naslundii serotype I.

• Restorative Dentistry and Endodontics
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• 제16권1호
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• pp.41-59
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• 1991

This study was performed to elucidate the distribution and correlation of immunoglobulin G subclasses with the degree of inflammation in the experimentally induced rat pulp and periapical pathoses. The pulp exposures were made in 108 mandibular 1st molars of 54 rats and the teeth were left open to the oral environment The animals were sacrified at 3, 7, 15, 30, 60 and 90 days after pulp exposure, and examined microscopically and radiographically Seventy one specimens were routinely sectioned at the thickness of 4 - $6{\mu}$ and stained with Hematoxylin - eosin for histologic examination, with toluidine blue for mast cells, and with the primary antibodies against rat IgG subclasses by using the Avidin - Biotin complex method. The following results were obtained: 1. As the degree of inflammation of rat pulp and periapeces intensified, the number of IgG subclass containing cells per unit area, especially IgG2a and IgG2c, decresased. 2. The IgG2c cells were most predominantly found in the lesions with slight inflammation, IgG1 cells in mild or severe inflammation, and IgG2a cells in moderate inflammation. 3. IgG subclass containg cells were more predominantly observed in the periapical granuloma than periapical abscess or cyst(p<0.01). 4. IgG2a containing cells were predominant in pulp inflammation, IgG1 containing cells in periapical granuloma, IgG2a cells and IgG1 cells in periapical abscess, and IgG2a cells were significantly predominant in periapical cyst. 5. The number of IgG subclass containing cells and mast cells in periapical tissue decreased with time lapse after pulp exposure. And correlation index between mast cells and IgG1, IgG2a, IgG2b was stastically high.

• Imaging Science in Dentistry
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• 제37권2호
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• pp.83-86
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• 2007

Purpose : To evaluate the efficacy of panoramic radiography by comparing the results of clinical examination with radiographic findings. Materials and Methods: We studied 190 patients (20 men and 170 women; mean age, 40 years; range, 22 to 68 years) who visited the health promotion center of Korea Medical Science Institute and were examined both clinically and by panoramic radiography. We compared results from both examinations. Treatment options by clinical examination were described as "no treatment indicated", "treatment of dental caries", "removal of calculus", "treatment of periodontal disease", "prothodontic treatment" and "extraction of the third molar". Findings taken from the panoramic radiography were: dental caries, periapical lesion, alveolar bone loss, calculus deposition, retained root, impaction of the third molar, disease of maxillary sinus, bony change of mandibular condyle, etc. Results: The prevalence of panoramic findings were: 37.9% of dental caries, 17.4% of periapical lesions, 44.7% of alveolar bone losses, 62.6% of calculi deposition, 7.9% of retained roots, 26.8% of third molar impactions, 6.3% of diseases of maxillary sinus, 2.1 % of bony changes of mandibular condlye and 35.8% of miscellaneous lesions. Abnormal conditions revealed by panoramic radiography which had not been discovered on clinical examination were: 24.2% of the patients had dental caries, 17.4% had periapical lesions, 7.4% had calculi deposition, 5.3% had retained roots, 15.3% had third molar impactions. The opposite cases were: 5.2% had dental caries, 12.6% had calculi deposition, and 9.5% had third molar impactions. Conclusion: The use of panoramic radiography as a supplement to the clinical examination might be a valuable screening technique.

• Restorative Dentistry and Endodontics
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• 제24권2호
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• pp.286-298
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• 1999

The endodontic-periodontic combined lesions have been difficult to get correct diagnosis and predictable treatment. This study was to make the experimental endodontic-periodontic combined defects in dogs for the study of the periodontal regeneration and to evaluate the efficacy of the enamel matrix protein and e-PTFE membrane in the experimental endodontic-periodontic combined defects. 5 mongrel dogs were used. The pulp chambers were opened and the plaque was inserted into the chambers to induce the periapical lesions on the mandibular second, third and fourth premolars of the dogs. 1 month later, the root canal treatments were done with gutta perch a and ZOE sealer. On the day of surgery, the periapical defects were standardized by trephine bur. The buccal dehiscence defects were made by the dental bur and bone chisels. The apicoectomy with retrofilling was done. The prepared roots were randomly selected for test and control groups. In the experimental groups, the enamel matrix derivative and e-PTFE membrane were used. Nothing was placed on the control group. Fluroscent labelling was used to evaluate the bone formation. After 4 and 12 weeks, the dogs were sacrificed and undecalcified sections were prepared and stained with toluidine blue. Those histologic sections were examined by fluorescent microscopy and light microscopy. The results were as follows. 1. In the control group, new bone was formed in the periapical defects and scarcely in the buccal dehiscence defects. New cementum was not detected at 4 and 12 weeks. 2. In the experimental groups, new bone, new cementum and periodontal ligament were found in the periapical and buccal dehiscence defects. The relative amount and the quality of the new bone, new cementum and periodontal ligament tissue that had formed on the experimental groups were superior to those of the control group. 3. The current observation implicated that e-PTFE membrane and enamel matrix protein could be the effective tools for the guided tissue regeneration of the endo-perio combined defects.

• 대한치과보철학회지
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• 제50권3호
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• pp.191-197
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• 2012

상악 전치부는 심미적 회복이 강조되는 부위다. 발치 후 치유될 때까지 기다린다면 치조골 흡수와 치간 유두 수축을 방지할 수 없다. 일단 흡수된 조직을 재생하기 위해서는 추가적인 외과적 술식이 필요하고 치료 기간도 많이 소요된다. 발치 전 치조골과 치은 조직이 건강하다면 치주 조직을 보존 유지하기 위해 발치와 동시에 즉시 임플란트 식립을 고려할 수 있다. 특히 건전한 발치와에서의 즉시 임플란트 식립은 여러 논문에서 성공적인 결과를 보였다. 치근단 병소가 존재하는 치아의 발치 후 즉시 임플란트 식립에 대해서는 부정적인 반응을 보이는 연구가 많았으나, 최근에는 확실한 발치와의 육아조직제거와 전신적 항생제 투여 시 성공률이 높다는 결과도 보고되고 있다. 본 증례는 73세 여환으로 상악 좌측 중절치의 포스트-코어와 금속도재관이 탈락되었으며 임플란트 치료를 받고 싶다는 주소로 내원하였다. 치근단 병소와 수직적 치근 파절이 존재하였으나 치근단 병소가 있는 치아에서도 즉시 임플란트 식립의 성공사례가 여러 차례 보고되어 발치 및 즉시 임플란트 식립을 계획하였다. 발치 후 발치와 육아조직제거와 클로르헥시딘 용액 소독 및 tetracycline 용액으로 soaking을 시행한 후 임플란트를 식립하였으며 식립 전 후로 전신적 항생제를 투여하였다. 임플란트를 식립하면서 인상채득하여 2일 뒤 임시 보철물을 장착하였다. 약 6개월 뒤 치경부 형태를 재연하여 최종 인상 채득하였으며 최종 보철물을 장착하였다. 보철물 장착 후 2년까지 치은선이 인접치아와 조화를 이루고 변연골 흡수없이 심미적으로 만족할만한 결과를 얻었기에 보고하는 바이다.