• The Korean Journal of Zoology
• /
• v.37 no.3
• /
• pp.385-408
• /
• 1994

출생후 0일. 7일. 14일 및 21일 그리고 성체의 흰쥐 전뇌 기저부의 내측중격핵, 수직 및 수평 대각 Broca대 거대세포 시삭전핵 그리고 복부담창구에서 신경성장인자수용체 (nerv-growth 배ctor receptor, NGFr)에 면역반응을 보이는 신경조직과 세포의 분화를 면역조직화학적 및 전자현미경적 방법을 이용하여 조사하였다. 출생후 초기와 성체에서 신경세포 원형질막 뿐만 아니라 세포질에서 NGFr 면역반응이 확인되었다. 그러나 성체에서 신경세포 원형질 막에서의 면역반응은 관찰되지 않았다. 특히 NGFr 면역반응은 골지 부위에서 보였고, 점상의 면역반응물들이 세포체의 세포질과 수상돌기에 소수 분산 분포하였다. 뇌 기저부의 NGFr 면역반응 신경세포들은 뇌 크기의 증대와 뇌 조직의 분화에 따라 점차 수적 증가를 보였다. 이 NGFr 면역반응 신경세포들은 세포의 모양과 세포체의 장 .단축의 비에 따라 6가지 형. 즉 1) 원형. 2) 타원형. 3) 세장형, 4) 방추형, 5) 삼각형, 6) 다각형으로 분류되었다. 전뇌 기저 핵에서 원형과 난형신경세포들의 출현율은 출생후 0일에서 높았으나 성체로 되면서 감소된 반면, 세장형. 방추형, 삼각형 그리고 다각형신경세포들의 출현율은 출생후 0일에서는 낮았으나 성체로 되면서 증가하였다. 모든 핵들에서 NGFr 면역반응 신경세포체의 부피는 출생후 0일에 759-1,640 Um3로 제일 작았으며, 수직 대각 Broca대와 복부담창구에서는 출생후 14일에 각각 5 107 7.385 Um3 그리고 내측중격핵, 수평 대각 Broca대, 거대세포 시삭전핵에서는 출생후 21일에 각각 4,705, 6,061, 6,412 Um3로 최대치를 보였다. 그후 성체로 되면서 모든 핵에서 1,893-3,464 $\mu$m3로 다시 감소하였다. 전자현미경적 관찰에서 출생후 21일된 흰쥐 수평 대각 Broca대에서 NGFr 면역반응은 세포체와 수상돌기의 원형질막 그리고 세포체내에서는 골지체, 다소포성소체 및 조면소포체에서 관찰되었다. 이 결과들로 미루어 NGFr은 출생후 발생단계와 성체의 횐쥐 전뇌 기저부에서 신경세포의 분화와 분포에 관계되는 것으로 생각된다.

• The Journal of the Korean bone and joint tumor society
• /
• v.11 no.1
• /
• pp.94-99
• /
• 2005

Paraganglioma is a neoplasm consisting of sympathetic neuroendocrine cells, which arise from neural ectoderm of extra-adrenal paraganglia. It often occurs in thyroid, carotid body, mediastinum, lung, duodenum, the retroperitoneal area and periaortic area. Malignant paraganglioma is defined not by the histological diagnosis, but by spread to regional lymph nodes or distant metastasis. Rare bone metastasis mostly occurs in the base of skull or spine, and even it rarely metastasizes to pelvis or femur. We would like to report two cases of paraganglioma; one in the subcutaneous fat layer that was mistaken for a vascular tumor, and the other in the retroperitoneal space with early bone metastasis.

• Korean Journal of Ichthyology
• /
• v.10 no.2
• /
• pp.231-240
• /
• 1998

The characteristics of cranium, vertebral column and fin supports of Acanthorhodeus gracilis were examined. The fish did not have a fontanell in cranium nor process of supraethmoid. It had double orbitosphenoids and a basioccipital process developed from anterior portion of basioccipital. It had a high and triangular dorsal process on supraoccipital. In the urohyal, hypohyal attachment was bifurcated and horizontal and vertical plate were in an elongated rhombus shape with posterior edge pointed. It had teeth of 1-rowed, 5/5 and 4 free teeth. The fish did not have a coracoid foramen on shoulder girdle. It does not have a uroneural on ural centrum. It had a long and slender posterior process of pelvic bone. It had a large and flat supraneural. The fish had 14 or 15 interneural spines, of which the 1st, 2nd, 3rd and 4th had single basiosts and the rest had double basiosts. It had 11 or 12 interhemal spines, of which the 1st, 2nd, 3rd and 4th had single basiosts and the rest had double basiosts.

• The Journal of Korean Academy of Prosthodontics
• /
• v.48 no.2
• /
• pp.111-121
• /
• 2010

Purpose: This 3D-FEA study was performed to investigate the influence of marginal bone loss pattern around the implant to the stress distribution. Material and methods: From the right second premolar to the right second molar of the mandible was modeled according to the CT data of a dentate patient. Teeth were removed and an implant ($\Phi\;4.0{\times}10.0mm$) was placed in the first molar area. Twelve bone models were created; Studied bone loss conditions were horizontal bone loss and vertical bone loss, assumed bone loss patterns during biologic width formation, and pathologic vertical bone loss with or without cortification. Axial, buccolingual, and oblique force was applied independently to the center of the implant crown. The Maximum von Mises stress value and stress contour was observed and von Mises stresses at the measuring points were recorded. Results: The stress distribution patterns were similar in the non-resorption and horizontal resorption models, but differed from those in the vertical resorption models. Models assuming biologic width formation showed altered stress distribution, and weak bone to implant at the implant neck area seams accelerates stress generation. In case of vertical bone resorption, contact of cortical bone to the implant may positively affect the stress distribution.

• Korean Journal of Ichthyology
• /
• v.31 no.4
• /
• pp.214-221
• /
• 2019

This study suggests basic data for taxonomic research among similar species by observing osteological development of larvae of Hemibarbus longirostris. Newly hatched yolk-sac larvae were 8.10±0.02 mm (n=5) in mean total length, and frontal, parasphenoid, and basioccipital in the cranium were ossified. On the 6 days after hatching, flexion-larvae were 10.9±0.26 mm (n=5) in mean total length, hyomandibular, sympletic, and ectopterygoid in the cranium were ossified. On the 12 days after hatching, post-larvae were 12.2±0.55 mm (n=5) in mean total length, interopercle in operculum region and postclavicle in shoulder girdle bone were ossified. On the 25 days after hatching, post-larvae were 16.1±0.27 mm (n=5) in mean total length, epihyal and interhyal in hyoid arch, two epural in caudal skeleton, interneural processes, and interhaemal processes were ossified. On the 40 days after hatching, juvenile were 27.9±3.74 mm (n=5) in mean total length, all skeletal development completed with hypural bone in the caudal skeleton region fused in three forms (1, 2+3, 4+5).

• The Journal of the Korean bone and joint tumor society
• /
• v.10 no.2
• /
• pp.138-141
• /
• 2004

Osteochomdromas, which are uncommon in the hand, are encountered most frequently with hereditary multiple exostosis. They can occur away from the epiphyseal plate region at the distal end of the proximal and middle phalanges. But little has been written about exostosis that occur at the distal end of the distal phalnges. We report one case of hereditary multiple exostosis that arose at the distal end of the distal phalnges. Complete excision was done and the patient was disease-free of 4 years follow-up.

• The korean journal of orthodontics
• /
• v.22 no.2 s.37
• /
• pp.413-426
• /
• 1992

In order to analyze the relationship between teeth and basal bone for the maintainance of the good occlusion, the mesiodistal width of teeth, the basal arch width and the basal arch length were measured on the study model of the normal occlusion group and Angle's class I malocclusion group (non-extraction group, extraction group) The Maximum tooth material, the percentage of basal arch width to maximum tooth material, the percentage of basal arch length to maximum tooth material and the percentage of basal arch width plus basal arch length to maximum tooth material were caculated, and then statistical analysis was done. From thie study, the obtained results were as follows; 1. In maxilla, the percentage of basal arch width to maximum tooth material was $46.9{\pm}2.6\%$ in normal occlusion group, $49.4{\pm}3.9\%$ in non-extraction group, and $42.5{\pm}3.3\%$ in extraction group. In mandible, that was $46.6{\pm}2.4\%$ in normal occlusion group, $47.5{\pm}4.0\%$ in non-extraction group, and $42.6{\pm}2.6\%$ in extraction group. 2. In maxilla, the percentage of basal arch length to maximum tooth material was $33.4{\pm}1.9\%$ in normal occlusion group, $33.9{\pm}1.8\%$ in non-extraction group, and $28.7{\pm}2.5\%$ in extraction group. In mandible, that was $34.4{\pm}4.3\%$ in normal occlusion group, $36.5{\pm}1.9\%$ in non-extraction group, and $31.5{\pm}2.5\%$ in extraction group. 3. In maxilla, the percentage of basal arch width plus basal arch length to maximum tooth material was $80.3{\pm}3.4\%$ in normal occlusion group, $83.3{\pm}4.8\%$ in non-extraction group, and $71.2{\pm}4.3\%$ in extraction group. In mandible, that was $81.0{\pm}5.2\%$ in normal occlusion group, $84.0{\pm}5.4\%$ in non-extraction group, and $74.1{\pm}4.1\%$ in extraction group. 4. In Maxilla, the $95\%$ confidence interval of the percentage of basal arch width to maximum tooth material was $46.3-47.5\%$ in normal occlusion group, $48.1-50.7\%$ in non-extraction group, and $41.7-47.2\%$ in extraction group. In mandible, that was $46.1-47.2\%$ in normal occlusion group, $46.1-48.8\%$ in non-extraction group, and $42.0-43.3\%$ in extraction group. 5. In maxilla, the $95\%$ confidence interval of the percentage of basal arch length to maximum tooth material was $32.9-33.9\%$ in normal occlusion group, $33.3-34.5\%$ in non-extraction group, and $28.1-29.2\%$ in extraction group. In mandible, that was $33.4-3.4\%$ in noraml occlusion group, $35.8-37.2\%$ in non-extraction group, and $30.9-33.1\%$ in extraction group. 6. In maxilla, the $95\%$ confidence interval of thepercentage of basel arch width plus basal arch length to maximum tooth material was $79.5-81.0\%$ in normal occlusion group, $81.6-84.9\%$ in non-extraction group, and $70.1-72.2\%$ in extraction group. In mandible, that was $79.8-82.2\%$ in normal occlusion group, $82.1-85.5\%$ in non-extraction group, and $73.1-75.1\%$ in extraction group. 7. There was correlation between maxilla and mandible in the maximum tooth material, the basal arch width, the basal arch length, the percentage of basal arch width to maximum tooth material, the percentage of basal arch length to maximum tooth material and the percentage of basal arch width plus basal arch length to maximum tooth material, but not in the basal arch length of male of the extraction group. * A thesis submitted to the Council of the Graduate School of Kyungpook national University in partial fulfillment of the requirements for the degree of Master of Dental Science in December, 1991.

• The Journal of the Korean bone and joint tumor society
• /
• v.10 no.2
• /
• pp.142-146
• /
• 2004

Bizzare parosteal osteochondromatous proliferation is a rare lesion, tends to frequently recur. It was first described in 1983, when Nora and his colleagues reported 35 examples of a proliferative lesion involving small bones of the hand and the feet. It was regarded as occurring only in the small bones of the hand and the feet initially, but from then on, other authors have been reported cases including those involving long bones, skull and maxilla. We experienced a case of bizzare parosteal osteochondromatous proliferation which affects the humeral shaft in a 14-year-old male patient. Radiographs showed calcified mass measuring $4{\times}3$ cm in size and attached to the underlying cortex, which had a broad stalk base. Histologically, it showed hypercellular cartilage maturation to the trabecular bone and plump amount of fibrous stroma in the spaces around the bony trabeculae. Bizzare parosteal osteochondromatous proliferation is a relatively rare lesion, but has a recurrent behavior and histologically tends to be mistaken for malignancy. It can be treated by excision.

• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.30 no.4
• /
• pp.562-573
• /
• 1997

Comparative osteology of Chromis notata, C. analis and C. fumea was studied based on the samples collected from the Korean waters. The three species are distinguished by the shape of cranium, visceral skeleton, vertebra and caudal skeleton. Chromis notata has a glossohyal which is slightly curved in shape while two other species are deeply curved. C. analis has three spiniform procurrent caudal rays while others have two. C. fumes could be distinguished easily by the shape of preopercle which is serrate in posterior margin. This investigator reveals following bones as new taxonomic criteria for the genus Chromis in Korea. In cranium, height of supraoccipital, height of process of parasphenoid and anterior margin of basisphenoid, in visceral skeleton, presence of fine papilla-like process at the surface of preopercular sensory canal, in orbital bone, width of preorbital, in hyoid arch, shape of glossohyal, union state between lower hypohyal and ceratohyal and union state between ceratohyal and epihyal, in shoulder girdle bone, dorsal margin of posttemporal, width of upper postclavicle, posterior end of lower postclavicle and posterior margin of first actinost bone, in vertebrae, beginning point of parapophysis, in caudal skeleton, upper shape of second neural spine of pleural centrum.

• The Journal of the Korean bone and joint tumor society
• /
• v.10 no.1
• /
• pp.45-49
• /
• 2004

Chondroblastoma is a benign chondroid-forming tumor usually originating in the epiphysis. The base of metatarsal bone contains neither an epiphysis nor a secondary ossification center and so is the rare site of chondroblastoma. Here, we present a case of chondroblastoma of the base of fifth metatarsal bone in 34-year-old man. Histologically, the osteoclast-like giant cells were abundant enough to simulate a giant cell tumor. And the chondroid intercellular matrix was intermixed but scanty. However, the background mononuclear cells showed irregular and indented nuclei with longitudinal clefts and positive immunoreactivity for S-100 protein, as the evidence of chondroblasts.