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4 2016 40권 4호

상악골에서 골-섬유조직이 과오종 같은 증식을 보이는 동맥류뼈낭종

저자 이상신, 김연숙, 이석근

초록

Aneurysmal bone cyst (ABC) in maxilla is a rare and benign lesion but shows extensive bony destruction, occasionally accompanied with secondary osseous lesions, i.e., central giant cell granuloma, ossifying fibroma, fibrous dysplasia, etc. As the pathogenesis of ABC has not been clearly defined, ABC is diagnostically challenged due to its variable histological features. A 17-year-old boy showed a huge radiolucent lesion at right anterior maxilla, which was accidentally found in routine dental-radiological examination for orthodontic treatment. He had no medical history of systemic disease, and did not remember any traumatic experience on his right anterior maxilla. The radiolucent lesion involved periapical area from right central incisor to right first premolar, and was clinically diagnosed as odontogenic keratocyst. During surgical operation a cyst-like sac was enucleated with severe hemorrhage. In the histological observation the thick fibrous sac showed no lining epithelium, and its luminal side disclosed multiple aneurysmal spaces which were shrunken and almost obliterated. The fibrous sac itself was hyperplastic with abundant vascular channels, and produced fibromatous thickening associated with ossifying trabecular bones. This fibro-osseous tissue was hamartomatous, which was not directly connected and organized with marrow bone of maxilla. Finally, the present case was diagnosed as secondary type ABC differentially from traumatic bone cyst (TBC), odontogenic cyst, and central reparative granuloma. And it was presumed that the hamartomatous proliferation of fibro-osseous tissue in the cystic sac of ABC could produce the swelling pressure effect in the bone marrow similar to the overgrowth of central giant cell granuloma, ossifying fibroma, fibrous dysplasia, etc., in the secondary type ABC.

3 2016 40권 4호

경구개에 발생한 여포성 림프 과증식

저자 차형석, 유동뢰, 이준, 윤정훈

초록

The follicular lymphoid hyperplasia is a very rare nonneoplastic lymphoproliferative disease in the oral mucosa. Clinically, it usually presents as asymptomatic, non-ulcerated, normal-colored, soft, sessile, unilateral and slow growing mass in the posterior hard palate. Therefore, soft-tissue mass of the hard palate can be a difficult diagnostic challenge for the clinician. Herein, we report a case of follicular lymphoid hyperplasia located in the left posterior hard palate. A 40-year-old male presented a soft, non-ulcerated, painless mass of 1.5 × 1.0cm in size. Radiographically, it was no bony involvement. Histology revealed germinal center surrounding mantle zone of small lymphocytes. Immunohistochemistry showed CD3,CD20 were postive but Bcl-2 and cyclin D1 were negative. The patient underwent surgical excision and 3-year follow-up has not shown any evidence of recurrence.

2 2016 40권 4호

근관치료 중 상악동내로 유출된 칼시펙스 II에 의해 발생한 만성상악동염

저자 Author

초록

Calcipex II, calcium hydroxide paste, is used widely as intracanal dressing material during root canal treatment. When extrusion of calcium hydroxide through root canal occurred, various tissue reactions have been reported. Herein, we report a case of chronic maxillary sinusitis induced by extrusion of Calcipex II. A 20-year-old male was referred our institution during #26 root canal treatment. Radiographically, it was presented radiopaque round mass with sinus mucosal thickening. The mass was excised and analyzed histologically. Histology revealed Calcipex II granules engulfed by macrophages and chronic maxillary sinusitis around Calcipex II granules.

1 2016 40권 4호

OCT 광학기기의 레진 컴파짓 수복평가의 응용

저자 전상미, 이영희, 지형준, 조혜중, 김서진, 김혜은, SUN QIAOCHU, 안규현, 최홍란, 김옥준

초록

Composite resins are developed as restorative materials to improve esthetics and mechanical properties. To improve the physical properties of resin material, resin filler have to be added. However, no imaging method is adopted for resin filler distribution. Optical coherence tomography (OCT) is a optical imaging technique to delineate microscopic structures within biological tissue. The OCT application to dental composites resin and its filler is not described yet. So, this new and advanced optical method is needed for clinical application for evaluation of dental composite resin. To analyze the spatial distribution of dental composite resin and to evaluate the resin restoration in cavity, frequency domain optical coherence tomography (FD-OCT) was used for their analysis. Resin restored tooth was prepared. For morphological observation, serially sectioned teeth, conventional X-ray taking and micro computed-tomography (CT) images were compared with OCT images. The experiment has done to evaluate the success of the resin restoration using 3 dimensional structure OCT image. In this research, OCT is evaluated as a new technique to image resin restoration. The evaluation of resin restored tooth was performed by OCT. Inappropriate restoration such as marginal adaptation, large porosities, internal integrity and poor contour could be detected. Resin filler also could be checked by OCT. The distribution, number, regularity and size of resin filler can be differentiated from several commercial products. Considering the characteristics of the OCT, it can be used to evaluate the defects of resin restoration, resin filler distribution, and internal integrity between resin material and tooth structure. The OCT can be considered to be a new and advanced method for the evaluation of resin restorations.

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