이공의 위치 및 형태에 관한 상사선학적 연구

손정익 慶北大學校 齒科大學 1995 慶北齒大論文集 Vol.12 No.2

22세에서 25세의 남녀 각 100명을 대상으로 하악 좌우측 소구치부위의 구내표준방사선사진을 얻어 표준위치에서의 이공의 정상적 형태 및 위치를 분석하고, 다시 남녀 각 50명을 선별하여 조사방향의 변화를 주어 얻은 구내 방사선사진에서 방사선조사방향의 변화에 따른 이공의 형태와 수평 및 수직적 위치의 변화를 평가하여 다음과 같은 결과를 얻었다. .이공의 형태는 elliptical형(34.3%), round또는 oval형(28.0%), unidentified형(25.5%), diffuse형(12.2%)의 순으로 나타났다. .이공의 수평적 위치는 제2소구치 부위(55.3%)와 제1소구치와 제2소구치 사이(39.6%)가 대부분이었으며, 제2소구치와 제1대구치 사이(3.4%), 제1소구치 부위(1.0%), 견치와 제1소구치 사이(0.7%)의 순으로 나타났다. .이공의 수직적 위치는 치근단에 비해 하방(67.1%)에 위치한 경우가 대부분이었으며, 치근단에 접하는 경우(24.8%), 치근단과 겹쳐 나타난 경우(6.4%), 치근단에 비해 상방에 위치하는 경우(1.7%)의 순으로 나타났다. .조사방향의 변화에 따른 방사선사진상의 이공의 형태는 표준위치에 비해 상방으로 이동시킨 경우에서 보다 분명하게 관찰되었으며, 이공의 수평적 및 수직적 표준위치의 방사선사진상과 유사하였다. The purpose of this study was to evaluate the position and shape of mental foramen in periapical radiographs of premolar areas. For this study, periapical radiographs of permolar areas were obtained from the 200 adults and evaluated the positional and shape changes of mental foramen. According to changes of radiation beam direction, the author also obtained periapical radiographs of premolar areas from the 100 adults and then evaluated the positional and shape changes of mental foramen. And the following results were obtained; Shapes of mental foramen were observed elliptical(34.3%), round or oval(28%), unidentified(25.5%) and diffuse(12.2%) type in descending order of frequency. Horizontal position of mental foramen were most frequently observed at the 2nd premolar area(55.3%), and area between the 1st premolar and 2nd premolar(39.6%), area between the 2nd premolar and 1st premolar and 2nd premolar(39.6%), area between the 2nd premolar and 1st molar(3.4%), 1st premolar area(1.0%), area between the canine and 1st premolar(0.7%) in descending order of frequency. Vertical position of mental foramen were most frequently observed at the inferior of apex(67.1%), and at apex(24.8%), overlap with apex(6.4%), superior of apex(1.7%) in descending order of frequency. According to changes of radiation beam direction, shape changes of mental foramen were more obviously observed at the upward 10˚positioned periapical radiographs. And changes of horizontal and vertical position were observed in similar to compared with normal positioned periapical radiographs.

拇指尺側種子骨의 出現과 齒牙發育과의 關係

孫政姬,成在鉉 慶北大學校 齒科大學 1984 慶北齒大論文集 Vol.1 No.1

The relationship between tooth mineralization and early radiographic evidence of the adductor sesamoid was studied with hand-wrist radiographs and Orthopantomographs which were taken in 193 boys and 126 girls aged 9 to 14 years. In addition to this, it was investigated the distribution of the ossification stages of the adductor sesamoid and the age at which the ossification of the adductor sesamoid occurred. The results were as follows: The distribution of the ossification stages of the adductor sesamoid was consistent with the acknowledged sex difference in general developmental progress and the rate of progressive ossification in girls was also found to be faster than that in boys. The ossification of the adductor sesamoid of the thumb occurred at 13-years-0-month in boys and 11-years-2-months in girls. Prior to the stage E of tooth mineralization of upper and lower canines, lower lst and 2nd premolars and lower 2nd molars in boys and girls, there was no evidence of the adductor esamoid ossification. The ossification of the adductor sesamoid was closely related to the stage G of tooth meralization of the mandibular 2nd molar in boys and the stage F of the mandibular 2nd mo??r in girls.

방사선조사에 따른 백서 악하선내 혈관 내피세표 미세구조의 조기변화

손정익,최갑식,류정수,배용철 大韓口腔顎顔面 放射線學會 1995 Imaging Science in Dentistry Vol.25 No.1

The purpose of this study was to investigate the early irradiation changes on the ultrastructure of the capillary endothelial cell in the rat submandibular glands. For the study, 110 Sprague-Dawley strain male rats were singly irradiated to their neck regions with the doses of 2Gy, 5Gy, and 10Gy by 6MV X-irradiation, and sacrificed on the 3 hours, 6 hours, 12 hours, 1 day, 3 days, 7 days, and 14 days after irradiation. The authors observed the histologic and ultrastructural changes of the capillary endothelial cell using the light and electron microscopes. The results were as follows: 1.In the light microscopic examination, the capillary dilation was observed on the 6 hours group and the capillary density was slightly increased on the 12 hours group after 2Gy and 5Gy irradiation. And luminal size and capillary density were decreased on the 3 days and the 7 day groups after irradiation, after then, they were recovered. But capillary density was still decreased on the 14 days group after 10Gy irradiation. 2.In the transmission electron microscopic examination, the mild proliferation of cytoplasmic process of the endothelial cell and reduction in luminal size were observed on the 3 hours group after irradiation. After then, endothelial swelling, marked proliferation of cytoplasmic process, thickened basal lamina, and numerous pinocytotic vesicles were observed after the 1 day group after irradiation. Thickened basal lamina and numerous pinocytotic vesicles were still observed until the 7 days group after irradiation. These changes were recovered to normal on the 14 days group after 2Gy and 5Gy irradiation, but not after 10Gy irradiation. 3.In the scanning electron microscopic examination, the dilation of conduits and constriction, and meandering were observed on the 1 day group after 10Gy irradiation. These changes were observed with increased coarseness of the surface of the vascular resin casting on the 3 days group after irradiation. 4.From the above results, endothelial swelling, proliferation of cytoplasmic process, and thickening of the basal lamina appeared before the 6 hours group after irradiation. And these changes may also induce the increase of the capillary number and luminal size, after then, capillary permeability was increased via the increase of the number of pinocytotic vesicles. The changes were observed earlier and more apparent with the increase of the irradiation doses under the dose of 10Gy irradiation.

이공의 위치 및 형태에 관한 방사선학적 연구

손정익 경북대학교치과대학 1995 慶北齒大論文集 Vol.12 No.2

원판형 압전변압기의 감압특성

손정호 가야대학교 2001 가야대학교 논문집 Vol.10 No.-

고전력 압전특성이 우수한 Pb[(Mn_1/3Sb_2/3)_0 05Zr_0 475Ti_0 475]O_3 조성을 선택하여 합성하고 원판형 감압용 압전변압기를 제작하였다. 그리고 출력 단의 간격을 일정하게 한 후, 입출력전극 면적 비에 따른 감압용 변압기 특성을 조사하였다. 변형 ring/dot 형의 전극구조가 감압용 변압기 특성을 나타내었다. 전압이득은 구동주파수 및 부하저항에 크게 의존하며, 공진주파수에서 전압이득이 최대가 되었다. 입력전압이 증가함에 따라 출력전압은 선형적으로 증가하였다. 출력부에 비하여 입력부의 전극면적이 작을수록 감압특성이 우수하게 나타났다. Disk-type step-down piezoelectric transformer was manufactured by using Pb[(Mn_1/3Sb_2/3)_0 05Zr_0 475Ti0_ 475]O_3 ceramics, which have excellent high power piezoelectric properties. The characteristics of step-down piezoelectric transformer as a function of the ratio of area between input and output electrodes were examined when the area of the output electrode is fixed. Modified ring/dot type electrode configuration showed characteristics of a step down piezoelectric transformer. Voltage gain was greatly dependent on driving frequency and load resistance, and the maximum voltage gain was obtained at the resonance frequency. The output voltage was linearly increased as the input voltage increased. When the area of the input electrode is decreased comparing to the output electrode, enlarged step down characteristics of the piezoelectrictransformer was observed.

결체증식성 법랑모세포증

손정익,최갑식,김동윤 大韓口腔顎顔面 放射線學會 1995 Imaging Science in Dentistry Vol.25 No.1

Desmoplastic variant of ameloblastoma is a new and unusual variant of ameloblastoma with extensive stromal desmoplastic proliferation. The authors experienced a case of desmoplastic variant of ameloblastoma with moderate-defined radiolucency on the right maxillary anterior area in 62-year-old female. As a result of careful analysis of clinical, radiological, histopathological examinations, we diagnosed it as desmoplastic variant of ameloblastoma, and the following results were obtained : 1. Main clinical symptoms were nontender bony swelling with normal intact overlying mucosa on the right maxillary anterior area. 2.Radiographically, moderate-defined, multilocular radiolucency on the right maxillary anterior area were shown, and severe cortical bony thinning and expansion to labial and palatal sides were also observed. And this lesion was shown to be extended to the right nasal cavity. 3.Histopathologically, follicle-like epithelial island with densely abundant collagenous stroma were morphologically compressed.

MPEG-21 표준의 구현을 위한 Testbed 구축

손정화,손현식,조영란,권혁민,김만배 강원대학교 정보통신연구소 2003 정보통신논문지 Vol.7 No.-

1990년대 후반부터 다양한 디지털 통신망을 이용하여 멀티미디어 컨텐츠 서비스가 가능하게 되었다. 하지만, 멀티미디어 컨텐츠의 전달 및 이용을 위한 기반 구조들의 독자적 발전 및 다양한 통합적 관리 체계 시스템으로 인해, 멀티미디어 컨텐츠 표현 방식의 호환성 문제, 혼재하는 네트워크 전달 방식과 단말 방식의 호환성 문제 등의 잠재적인 문제점이 발생한다. 이런 문제의 대안으로 현재 존재하는 기술 및 기반 구조들 사이의 연동을 통한 큰 프레임워크인 MPEG-21이 진행 중이다. 본 논문에서는 현재 표준화 작업이 진행 중인 MPEG-21을 기반으로 하는 Testbed를 제안한다. Testbed는 server, client, DIA(Digital Item Adaptation)의 세 모듈로 구성된다. Server의 역할은 멀티미디어 컨텐츠를 Digital Item(DI)으로 생성하고, client가 DI를 요구할 경우 DIA 모듈을 통해서 변환된 DI를 client에게 제공한다. DIA 모듈은 server에서 동작되며 client로부터 요청된 DI를 분석하고 client로부터 전송된 환경 정보를 이용하여 client 환경에 적합하게 변환된(adapted) DI를 생성하는 것이 주 기능이다. Client는 server에 저장되어 있는 DI를 선택하고 user preference, terminal capability 등의 필요한 정보를 server로 전송한다. Testbed에서는 스포츠 경기의 동영상, 정지 영상, 경기 내용, 역사를 기록한 파일 등의 DI를 이용한다. 표현 언어는 XML이며, HTTP 기반의 Web 환경에서 구동되도록 설계된다.

정신과 폐쇄 병동 환경 평가에 영향을 미치는 임상변인 : 치료의 질적 향성을 위한 예비적 연구 The Preliminary Study for Promoting the Quality of Psychiatric Inpatient Treatment

서정석,류은정,이상미,한미희,최귀순,손인기,남범우 건국대학교 의과학연구소 2003 건국의과학학술지 Vol.13 No.-

Purpose: IS prelminary study was designed to assess the clinical variables influencing on the ward atmosphere in psychiatric closed ward and to promote the quality of psychiatric inpatient treatment. Method: 41 psychiatric inpatients were selected in Chung-ju hospital, Konkuk university. Ward Atmosphere Scale(W AS) was used to evaluate patients' perception of ward milieu. WAS score were compared among subgroups with respect to the clinical variables such as duration of admission, frequency of admission, and diagnosis. Results: Significantly, patients who have hospitalized for 1 month to 2 months reported lower score of WAS and patients who have hospitalized for longer than 2 months reported higher score of WAS. The relationship between educated levels and WAS score was not significant. First admitted patients reported significantly lower score of WAS. Bipolar patients reported significantly higher score of WAS and alcohol related patients reported significantly lower score of WAS. Conclusion: The 1st admitted patients, patients with alcohol problem and educated patients were had less satisfied with psychiatric closed ward. Thus, by considering these factors, more specified therapeutic approach and plan should be conducted.

Na+/H+ exchanger와 HCO-₃Transporter에 의한 흰쥐 타액선 선세포내 pH 조절

서정택,박동범,손흥규,이종갑 大韓小兒齒科學會 1998 大韓小兒齒科學會誌 Vol.25 No.2

Intracellular pH (pHi) plays an important role in the regulation of cellular processes by influencing the activity of various enzymes in cells. Therefore, almost every type of mammalian cell possesses an ability to regulate its pHi. One of the most prominent mechanisms in the regulation of pHi is Na+/H+ exchanger. This exchanger has been known to be activated when cells are stimulated by the binding of agonist to the muscarinic receptors. Therefore, the aims of this study were to compare the rates of H+ extrusion through Na+/H+ exchanger before and during muscarinic stimulation and to investigate the possible existence of HCO-₃ transporter which is responsible for the continuous supply of HCO-₃ ion to saliva. Acinar cells were isolated from the rat mandibular salivary glands and loaded with pH-sensitive fluoroprobe, 2', 7' -bis(2-carboxyethyl)-5(6)-carboxyfluorescein(BCECF), for 30min at room temperature. Cells were attached onto the coverglass in the perfusion chamber and the changes in pHi were measured on the iverted microscope using spectrofluormeter. 1. By switching the perfusate from HCO-₃-free to HCO-₃-buffered solution, pHi decreased by 0.39±0.02 pH units followed by a slow increase at an initial rate of 0.04±0.007 pH units/min. the rate of pHi increase was reduced to 0.01±0.002 pH units/min by the simultaneous addition of 1 mM amilorede and 100μM DIDS. 2. An addition and removal of NH+₄ caused a decrease in pHi which was followed by an increase in pHi. The increase of pHi was almost completely blocked by 1mM amiloride in HCO-₃-free perfusate which implied that the pHi increase was entired dependent on the activation of Na+/H+ exchanger in HCO-₃=free condition. 3. An addition of 10μM carbachol increased the initial rate of pHi recovery from 0.16±0.01 pH units/min to 0.28±0.03pH units/min. 4. The initial rate of pHi decrease induced by 1mM amilorede was also increased by the exposure of the acinar cells 10μM carbachol(0.06±0.008pH unit/min) compared with that obtained before carbachol sitmulation (0.03±0.004pH unit/min). 5. The intracellular buffering capacity β1 was 14.31±1.82 at pHi 7.2-7.4 and β1 increased as pHi decreased. 6. The rate of H+ extrusion through Na+/H+ exchanger was greatly enhanced by the stimulation of the cells with 10μM carbachol and there was an alkaline shift in the activity of the exchanger. 7. An intrusion mechanism of HCO-₃ was identified in rat mandibular salivary acinar cells. Taken all together, I observed 3-ford increased in Na+/H+ exchanger by the stimulation of the acinar cells with 10μM carbachol at pH 7.25. In addition, I have found an additional mechanism for the regulation of pHi which transported HCO-₃ into the cells.

정신보건관련인력의 정신질환자에 대한 태도 연구

사공정규,송창진,손인기 東國大學校 2000 東國論叢 Vol.39 No.-

Attitudes of the health personnel toward the mentally ill affect the development and utilization of the community mental health program and reintegration of the mentally ill into society. Therefore the authors carried out a survey of attitudes toward mentally ill in the health personnel by measuring Community Attitudes to the Mentally Ⅲ Inventory(CAMI). The purpose of this survey was to get basic data to develop plan and strategy of community mental health in Pohang city. The results were as follows : (1) The health personnel of Pohang community showed positive attitude of 'Benevolence' and 'Community mental health ideology' and negative attitude of "Authoritarianism' and 'Social restrictiveness'. Therefore community mental health project in Pohang city will be established and activated easily. (2) The male group had more authoritative, less community mental health oriented attitude. (3) the more aged group had more authoritative, social restrictive attitude. (4) the unmarried group had less authoritative, social restrictive attitude. (5) The lower educated group had more authoritative, social restrictive and less benevolent, community mental health oriented attitude. (6) Monthly income 1-2 million Won group had more authoritative, social restrictive attitude, less community mental health oriented attitude. (7) The respondents who have never met mentally ill had less community mental health oriented attitude. (8) The respondents who themselves had used mental health services more benevolent, less authoritative, social restrictive attitude. From the above results, authors propose that planning of mental health project be necessary containing information and education for negative group and making resource for positive attitude group.