• 치과방사선
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• 제23권2호
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• pp.291-299
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• 1993

This study was designed to evaluate the correlationship between radiologic classifications of cysts in oral region and glycosaminoglycan analysis of cystic fluids using cellulose acetate electrophoresis. The materials for this study consisted of 37 cases-8 periapical cysts, 10 dentigerous cysts, 10 primordial cysts, 2 residual cysts, 3 incisive canal cysts, 2 post-operative maxillary cysts, 1 mucocele on maxillary sinus, & 1 unicystic ameloblastoma-diagnosed as cystic lesions radiologically. The obtained results were as follows: 1. At the stepwise discriminant analysis, four variables-low mobility material, heparin, hyaluronic acid, & dermatan sulfate-were used to define diagnostic model for the odotogenic cyst. The model produced a sensitivity of 100% and a specificity of 85%. 2. The intensities of heparin and chondroitin-4-sulfate were greater in dentigerous cyst than periapical cyst(p<0.05). The intensity of chondroitin-4-sulfate was greater in primordial cyst than in periapical cyst(p<0.05). 3. It showed no statistically significant difference in glycosaminoglycan of the cystic fluids between dentigerous cyst and primordial cyst(p>0.05). 4. On the fluids of the cysts originated from maxillary sinus, there were especially high intensities of heparin and dermatan sulfate, and low intensity of chondroitin-4-sulfate. 5. On the fluids of unicystic ameloblastoma, there were high intensity of dermatan sulfate and low intenity of chondroitin-4-sulfate.

• 대한장애인치과학회지
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• 제8권2호
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• pp.134-138
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• 2012

In treatment of dentigerous cyst, complete enucleation, histopathologic examination and postoperative care are important to prevent the potential complications (mural ameloblastoma, squamous cell carcinoma). On the other hand, a maxillary impacted supernumerary anterior tooth are removed surgically, owing to the possibility of the cyst formation in future. After the cyst enucleation and extraction of the involved tooth, the wound area sutured and removable resin plate is then applied. In this operation, the postoperative bleeding and infection is likely to occur owing to postoperative accumulation of hematoma & seroma, psychologic stress and other contaminated factor. So, the authors established the immediate rubber & iodoform gauze drainage into the sutured wound of cyst enucleation & tooth extraction for the prevention of postoperative bleeding and infection. The removable resin splint are not used because of the poor cooperation and economic factor. The results were more favorable without the postoperative bleeding & wound infection in a cerebral palsy patient.

• 대한소아치과학회지
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• 제29권3호
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• pp.463-468
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• 2002

단방성 법랑모세포종(Unicystic ameloblastoma)은 임상적, 방사선적 및 병리학적 소견과 치료방법 등이 법랑모세포종과 구별되어 따로 분류된 질환이다. 임상적, 방사선적으로는 치성낭종의 소견을 보이는 단방정 병소이며 조직학적으로 낭종의 소견과 함께 법랑모세포종의 소견을 보인다. 하악 구치부에 호발하며 악골에 무통성 종창을 야기 할 수 있으나 대개는 무증상인 경우가 많고 대부분 미맹출치 치관을 둘러싼 방사선 투과성 병소로 나타나며 방사선적으로 함치성낭(dentigerous cyst)이나 잔류낭(residual cyst)과 유사하다. 조직학적으로 낭종상피의 법랑모세포종성 변화(luminal type), 낭종강 내 종양결절의 돌출(intraluminal type), 결합조직 내로 법랑모세포종 세포의 증식(mural type) 등의 소견을 보인다. 본 증례는 좌측 안면부 종창을 주소로 내원한 8세 남자 환아에서 임상적, 방사선적 검사 후 낭종의 완전 적출술(enucleation)및 장골이식(iliac bone graft)을 시행하였으며 생검을 통해 단방성 법랑모세포종이라 확진되었고 양호한 치료 결과를 얻었기에 이에 보고하는 바이다.

• 대한치과의사협회지
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• 제18권2호통권131호
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• pp.103-108
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• 1980

The occurrence of odontogenic epithelium in the well of a dentigerous cyst is a well known entity. This epithelium usually remains inactive and does not have clinical significance. However, these small inactive islands of epithelium may be stimulated, resulting in an ameloblastoma. Therefore correct diagnosis and proper treatment are very important. A 15 year-old boy came to the outpatient clinic on August 13, 1979. The Chief complaint was pain, difficulty in mouth opening and swelling of the right mandible of 1 month's durations. With the X-ray filming, it was revealed that dentigerous cyst had been originated from the third molar, occurred in posterior region of the right mandible involving the 1st and the and molar and the portion just beneath the sigmoid notch area. Pus discharged from the gingival sulcus distal to the 2nd molar and it was sure that the cyst had been infected. Enucleation performed with careful excision of all cyst wall was successfully carried out, and recovery and heading were rapid and uncomplicated.

• 대한기관식도과학회:학술대회논문집
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• 대한기관식도과학회 1981년도 제15차 학술대회연제순서 및 초록
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• pp.12.1-12
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• 1981

여포성 치아낭종은 치아여포와 관련되어 발생하는 낭종으로서, 매몰 혹은 미립치아의 치관부가 완전히 형성된 이후에 치관부와 퇴행성 변화를 일으킨 사기질 상피 사이에 액체가 저류되어 낭종으로 발달된 것을 말한다. 여포성 치아 낭종은 전 치성낭종의 약 20%를 차지하며, 영구치에서 잘 생긴다. 하악골에 주로 발생하며, 특히 매몰치아가 흔한 하악골색 제 3 대구치, 상악골의 견치에서 잘 볼 수가 있다. 안면부 기형이 나타날 때까지는 임상증세가 없는 것이 보통이나 종들이 커지면 안면부 기형과 함께 구개부 융기, 종물부위의 이물감, 암통 및 인접치아의 치근 흡수등을 초래하기도 한다. 드물게는 범람종, 상피암 및 점막상피암등의 합병증을 일으킬 수 있으므로 조기적출을 하는 것이 좋다. 진단방법으로는 X-선 촬영이 중요하며 이때에 치관주변부가 투명하게 나타난다. 저자들은 최근 안면부 기형 및 경구개 융기를 초래한 거대 여포성 치아남종이 있던 15세 남자 환자를 치험하였기에 문헌적 고찰과 함께 보고하는 바이다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제40권6호
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• pp.260-265
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• 2014

Objectives: The aim of this study was to verify the clinical effectiveness of decompression in decreasing the size of a cyst. In addition to the different types of cysts, we tried to reveal what effect host factors, such as the initial size of the lesion and the age of the patient, have on the velocity of cyst shrinkage. Materials and Methods: With the aid of a panoramic view, we measured the size of the cysts before and after decompression in 13 dentigerous cysts (DCs), 14 keratocystic odontogenic tumors (KTOCs), and 5 unicystic ameloblastoma (UA) cases. The velocity of shrinkage in the three cystic groups was calculated. Relationships between the age of the patient, the initial size of the cyst, and the shrinkage velocity were investigated. Results: The three types of cysts showed no inter-type differences in their velocity of shrinkage. However, there was a statistically meaningful relationship between the initial size of the lesion and the absolute velocity of shrinkage in the DC group (P=0.02, R=0.65) and the KTOC group (P=0.02, R=0.56). There was also a significant relationship between the age of the patient and the absolute velocity of shrinkage in the KTOC group (P=0.04, R=0.45) and the UA group (P=0.04, R=0.46). Conclusion: There was no difference in the decrease in size due to decompression among the different types of cysts. However, the age of the patient and the initial size of the lesion showed a significant relationship with the velocity of shrinkage.

• Imaging Science in Dentistry
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• 제53권1호
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• pp.27-34
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• 2023

Purpose: The aim of this study was to clarify the influence of training with a different kind of lesion on the performance of a target model. Materials and Methods: A total of 310 patients(211 men, 99 women; average age, 47.9±16.1 years) were selected and their panoramic images were used in this study. We created a source model using panoramic radiographs including mandibular radiolucent cyst-like lesions (radicular cyst, dentigerous cyst, odontogenic keratocyst, and ameloblastoma). The model was simulatively transferred and trained on images of Stafne's bone cavity. A learning model was created using a customized DetectNet built in the Digits version 5.0 (NVIDIA, Santa Clara, CA). Two machines(Machines A and B) with identical specifications were used to simulate transfer learning. A source model was created from the data consisting of ameloblastoma, odontogenic keratocyst, dentigerous cyst, and radicular cyst in Machine A. Thereafter, it was transferred to Machine B and trained on additional data of Stafne's bone cavity to create target models. To investigate the effect of the number of cases, we created several target models with different numbers of Stafne's bone cavity cases. Results: When the Stafne's bone cavity data were added to the training, both the detection and classification performances for this pathology improved. Even for lesions other than Stafne's bone cavity, the detection sensitivities tended to increase with the increase in the number of Stafne's bone cavities. Conclusion: This study showed that using different lesions for transfer learning improves the performance of the model.

• Imaging Science in Dentistry
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• 제49권3호
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• pp.241-249
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• 2019

Ameloblastoma is a benign locally invasive tumor with a high tendency to recur. It is considered rare in the pediatric population, with most cases diagnosed in the third to fifth decades of life. Approximately 80% of ameloblastomas occur in the molar and ramus region of the mandible, while 20% of cases occur in the maxillary posterior region. This report presents a case of plexiform ameloblastoma in an uncommon location in an 8-year-old child. The lesion was initially thought to be a dentigerous cyst, based on its location and radiographic appearance. The clinical and radiographic features, histopathology, and treatment of solid, plexiform, maxillary ameloblastoma are reviewed, with an added emphasis on a literature review of ameloblastoma in children. This report emphasize the importance of long-term follow-up, since recurrence may occur many years after initial tumor removal.

• 치과방사선
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• 제23권2호
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• pp.255-264
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• 1993

The purpose of this study was to obtain some informations for the radiographic differential diagnosis between dentigerous cysts and unicystic ameloblastomas in the mandible. The authors observed and compared the clinico-radiographic features of 38 cases of dentigerous cyst and 32 cases of unicystic ameloblastoma associated with impacted mandibular molar. The obtained results were as follows: Dentigerous cysts occurred the most frequently in the 3rd decade, but unicystic ameloblastomas in the 2nd decade, and both lesions occurred with slight predilection in males. Average of lesional size of unicystic ameloblastomas was larger than that of dentigerous cysts, and lesions of over 25㎠ were only in unicystic ameloblastomas. Cortical thinning and expansion were more frequently observed in unicystic ameloblastomas at 72.9% than in dentigerous cysts at 15.8%. Dentigerous cysts showed smooth border at 89.5%, but unicystic ameloblastomas showed smooth border at 53.1% and scalloped border at 46.9%. Dentigerous cysts showed well-defined outline at 81.6%, but unicystic ameloblastomas showed well-defined outline at 53.1% and moderate-defined outline at 46.9%. In both lesions, the mandibular 3rd molar was the most frequent causative tooth. Average of distance between the cemento-enamel junction and lesional wall attachment of the causative tooth was longer in unicystic ameloblastomas than in dentigerous cysts. Severe displacement of causative tooth was more frequent in unicystic ameloblastomas at 62.5% than in dentigerous cysts at 23.7%. Dentigerous cysts showed homogeneous lesional radiolucency at 89.5%, but unicystic ameloblastomas showed inhomogeneous lesional radiolucency at 53.1%. Root resorption of adjacent tooth and displacement of mandibular canal were more frequent in unicystic ameloblastomas at 65.2% and 61.5% than in dentigerous cysts at 15.8% and 38.1% respectively.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제13권2호
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• pp.160-166
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• 1991

치성낭종과 법랑아세포종과의 조직학적 기준이 모호한 경우에 과거에는 병리학자들이 진단하는데 어려움이 많았으나 1970년 Robinson & Martinez가 조직학적 기준을 제시하면서 unicystic ameloblastoma라 명명하였다. Unicystic ameloblastoma는 conventional ameloblastoma 보다 젊은 연령인 10대, 20대에서, 하악 제3대구치부에서 호발하며 방사선학적으로 단방성 혹은 다방성의 비교적 경계가 뚜렷한 방사선 투과성 병소를 보인다. 이 병소는 적출술만으로 치료하였을 때 solid or multicystic ameloblastoma보다 현저히 낮은 재발율을 보인다. 임상적, 방사선학적으로 unicystic ameloblastoma가 의심되면 병소를 완전히 적출하여 정확한 병리조직학적 진단을 하여 solid or multicystic ameloblastoma일 때는 2차적으로 광범위한 수술 등을 고려하는 것이 타당할 것으로 사료되어 문헌고찰과 함께 3증례의 치료 경험을 보고하는 바이다.