Cemento-ossifying fibroma is a benign fibrous lesion with an unknown cause, mostly asymptomatic, painless swelling of the affected jaw. This is a case report on a cystic lesion found on radiographic examination in a patient with an extraction of mandibular left tooth. A 29-year-old female was referred to Pusan National University Dental Hospital due to a radiopaque lesion in the left mandible. On the medical history examination, the left lower mandibular tooth had been extracted 4 years ago, and there were no specific findings in the general medical history. According to histopathologic findings, along with proliferation of spindle cells, cementum-like substances were observed along with irregularly shaped osseous calcified substances containing osteocytes in the cellular fibrous connective tissue. In this study, we report a case that showed cystic changes due to tooth extraction, which made it complicated to determine the differential diagnosis from the existing fibrous-osseous lesion.

The myxoma(odontogenic myxoma, myxofibroma) of the jaws is a benign, usually slow-growing infiltrative tumor of connectice tissue. This article describes a case history of the treatment of recurred odontogenic myxofibroma in the maxilla and further discusses the appropriate management of such cases with reference to the literature review. A 55-year-old male patient presented with a gingival swelling in the right side of maxilla. He had history of second time recurred disease. Microscopically, a high cellularity fibrous tumor with fibroblastic cells was observed. Tumor cells were composed of stellate and spindle shaped fibroblasts. Islands of odontogenic epithelium were seen in the specimen. The final diagnosis was made with odontogenic myxofibroma in consideration of twice-time recurrences and histological characteristics. Because of the high likelihood of recurrence, an accurate differential diagnosis of pathology at the time of initial visit is very important in determining treatment options, and immunohistochemical tests may be helpful. Also close following up is required.(155 words)

본 연구는 유치원에서의「벽화」프로젝트 활동이 유아의 그리기표상능력과 친사회적 행동에 미치는 영향을 알아보기 위한 것이다. 연구대상은 경북 J유치원 만5세 유아 24명을 실험집단으로, H유치원 만5세 유아 24명을 비교집단으로 하였다. 실험집단의 경우 2016년 4월 25일부터 6월 24일까지 9주간 연구자와 교사가 함께 관련문헌과 유아특성 및 상황을 고려하여 계획한「벽화」프로젝트의 각 단계 별 활동을 매주 3-4회를 기준으로, 유아의 흥미와 몰입 정도 및 유치원 상황에 따라 융통성 있게 운영하였다. 비교 집단의 경우 같은 기간 동안 생활주제 중심 미술활동을 실시하였다. 연구도구는 「그리기표상능력 검사」(지성애, 김희정, 김치곤, 2011)와 「친사회적 행동 검사」(이원영, 박찬옥, 노영희, 1993) 결과 도구를 사용하였다. 연구문제를 검증하기 위해 t검증을 실시한 결과, 유치원에서의「벽화」프로젝트 활동은 유아의 그리기표상능력과 친사회적 행동 증진에 긍정적인 영향을 미치는 것으로 나타났다. 이에 본 연구에서 적용한「벽화」프로젝트 활동은 유아의 그리기표상능력과 친사회적 행동을 증진시키기 위한 교수․학습 방법으로 적용 가능함을 시사한다.