임플랜트 전산화단층사진에서 하악의 위치와 gantry각의 변화가 임플랜트 매식로 평가에 미치는 영향에 관한 연구

이설미,안창현,최항문,허민석,이삼선,최순철,박태원,Lee Sul-Mi,An Chang-Hyeon,Choi Hang-Moon,Heo Min-Suk,Lee Sam-Sun,Choi Soon-Chul,Park Tae-Won 대한영상치의학회 2002 Imaging Science in Dentistry Vol.32 No.1

Purpose: The altered gantry angle during scanning for some multiplanar reconstruction CT program (CT/MPR) may cause distortion of the image. The aim of this study was to ascertain whether there is a image distortion in a reformatted image when the gantry and the object are equally inclined using ToothPix and DentaScan program. Materials and Methods: A resin block model with four cylindrical holes and a human dry mandible were used. Two MPR software packages, ToothPix and DentaScan program, were used for reformatted panoramic images. The block and the gantry were equally inclined at 0°, 15°, and 30°. Results: With ToothPix program, a resin block model with empty holes and a dry mandible showed inclined images in the reformatted panoramic image. Increasing the gantry angle, the depth and inclination of the holes were increased in the reformatted central panoramic images. However, a resin block model with gutta perch a in its holes and a dry mandible with a wire in its mandibular canal didn't show image distortion. With DentaScan program, image distortion was not seen in any situation. Conclusion: ToothPix program may distort the reformatted image when the gantry angle is not at zero degrees. However, with DentaScan program, the patient may be positioned comfortably and the gantry can be adjusted to the patient positioning.

Exploring Nuruk Aroma; Identification of Volatile Compounds in Commercial Fermentation Starters

이설미,신광진,이승주 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.2

Volatile compounds of 7 commercial fermentation starters, including 4 traditional nuruk, 2 ipguk, and 1 crude amylolytic enzyme, were extracted using solvent-assisted flavor evaporation (SAFE), and extracts were analyzed using GC-MS. A total of 70 volatile compounds, including 4 esters, 10 acids, 16 alcohols, 16 hydrocarbons, 9 ketones, 5 aldehydes, 3 volatiles phenols, and 7 miscellaneous components were identified. Concentrations of volatile compounds, including 4,6-dimethylundecane, methyl 2-hydroxybenzoate, 1-hexanol, 2-phenylethanol, 3-methylbutanoic acid, and hexanoic acid were higher in 4 traditional nuruk starters than in others. The major volatile components in 2 ipguk starters were the hydrocarbones dodecane, heptadecane, octadecane, and nonadecane. Concentrations of 2-methoxy-4-vinylphenol and 3-hydroxy-2-butanone were highest in the crude amylolytic enzyme starter. Compositions and amounts of volatile compounds were different among the 7 commercial fermentation starters.

구외 방사선사진 촬영에 사용되는 기준선의 상호 관계

이설미,최항문 大韓口腔顎顔面 放射線學會 2001 Imaging Science in Dentistry Vol.31 No.4

Purpose : The aim of present study is to estimate the relationship among reference lines used for taking the extraoral radiography and panoramic radiography. Materials and Methods : Lateral cephalographs of 40 adults, aged 22 to 30 years were taken. Angles between reference lines (Frankfort line, canthomeatal line, infraorbitomeatal line, and occlusal plane) were measured. Results : Angles between Frankfort line and canthomeatal line, Frankfort line and infraorbitomeatal line, Frankfort line and occlusal plane, canthomeatal line and infraorbitomeatal line, canthomeatal line and occlusal plane, and infraorbitomeatal line and occlusal plane were 16.1°(±2.2), 5.8°(±2.4), 8.7°(±3.5), 10.3°(±1.3), 24.8°(±4.0), and 14.5°(±4.4), respectively. Conclusion : Angle between frankfort and canthomeatal line is very different with commonly known angle. Frankfort horizontal reference lines used for panoramic radiography need an exact definition and more accurate standard is needed for the taking of panoramic radiograph (Korean J Oral Maxillofac Radiol 2001; 31 : 205-7)

다량의 골양물질을 형성한 중심성 거대세포육아종의 영상진단

이설미,허민석,이삼선,최순철,박태원 대한구강악안면방사선학회 2000 Imaging Science in Dentistry Vol.30 No.2

A 19-year-old man was referred to Seoul National University Dental Hospital for evaluation of a large painless swelling of the left mandibular angle area in August, 1999. The growth had been first noted 6 years ago. He had visited other hospital in 1997. In spite of the treatment given at the hospital, the mass continued to grow rapidly. Conventional radiographs in 1999 showed an expansile, lobulated, and destructive lesion of the left mandibular body. CT scan demonstrated an expansile mass with a corticated margin. Bony septa were seen within the lesion. Internal calcification noted on the bone-setting CT image, and corresponded to the hypointense area in T1-weighted MRI image. MRI clearly delineated the extent of the lesion which had heterogenous intermediate signal intensity in T1-weighted images and heterogenous hyperintense signal intensity in T2-weighted images. The lesion was well-enhanced. Histopathologically, the lesion was well demarcated. Multinucleated giant cells were presented in a fibrous background, demonstrating a storiform pattern. Areas of osteoid rimmed by a few osteoblasts were scattered throughout the lesion. Inflammatory cells, blood vessels, and hemosiderin deposition were also shown. CGCG may show lots of internal calcification foci on the CT, and varied signal intensity in MRI. More cases will be needed to understand the features of the CT & MR fonding of CGCG. (Korean J Oral Maxillofac Radiol 2000 ; 30 : 127-131)

방사선사진과 안모사진을 이용한 하악 비대칭의 평가

이설미 大韓口腔顎顔面 放射線學會 2001 Imaging Science in Dentistry Vol.31 No.4

Purpose : To assess the relationship between soft tissue asymmetry and bone tissue asymmetry using the standardized photographs and the posteroanterior (PA) cephalometric radiographs in mandibular asymmetric patients. And to clarify that the lack of morphologic balance among different skeletal components can often be masked by compensatory soft tissue contributions. Methods : Experimental group consisted of 58 patient whose chief complaints were facial asymmetry, they were taken with standardized facial photographs and PA cephalometric radiographs. Control group consisted of 30 persons in the normal occlusion. The reproducibility of the facial photograph was confirmed by model test. The differences of fractional vertical height and horizontal width from standardized facial photographs and PA cephalometric radiographs were compared and analyzed. Results : The difference of fractional vertical bone height was 0.63 and fractional vertical soft height was 0.58 in control group, 3.10 and 2.01 in asymmetric group, respectively. The difference of fractional horizontal bone width was 0.52 and fractional horizontal soft width was 0.70 in control group, 2.51 and 1.70 in asymmetric group, respectively. Both soft and bone tissue showed significant difference between control and asymmetric group (p<0.05). The difference of bone tissue was greater than that of soft tissue (p<0.05) in the experimental group but, not in control group. Conclusion : Soft tissue components may compensate for underlying skeletal imbalances. (Korean J Oral Maxillofac Radiol 2001; 31 : 199-204)

전산화단층사진을 포함한 Eagle 증후군의 증례보고

이설미,권혁록,최항문,박인우,Lee Sul-Mi,Kwon Hyuk-Rok,Choi Hang-Moon,Park In-Woo 대한영상치의학회 2002 Imaging Science in Dentistry Vol.32 No.2

Two cases of Eagle's syndrome are reported. The first case involved a 31-year-old man who complained of pain in his throat and pain at preauricular area on turning his head. Panoramic and computed tomography (CT) views showed bilateral stylohyoid ligament ossification. The symptoms were relieved after surgical removal. The second case involved a 56-year-old female whose chief complaints were a continuous dull pain and occasional 'shooting' pain on lower left molar area. During the physical examination, an ossified stylohyoid ligament was palpated at the left submandibular area. Panoramic and CT images showed prominent bilateral stylohyoid ligament ossification. CT scans also showed hypertrophy of left medial and lateral pterygoid muscles. The symptoms were relieved after medication. CT is a useful tool for the examination of ossified stylohyoid ligaments and studying the relationship between Eagle's syndrome and adjacent soft tissue.

단면 CT 영상을 이용한 무치악 하악 대구치부 잔존골의 형태 분석

이설미,허경회,이원진,허민석,이삼선,강태인,최순철 대한구강악안면방사선학회 2007 Imaging Science in Dentistry Vol.37 No.3

Purpose : The purpose of this study was to evaluate the morphologic features of posterior edentulous mandible for Korean patients using cross-sectional CT images. Materials and Methods : Computed tomographic cross-sectional views taken in 2004 and 2005 at Seoul National University Dental Hospital were analyzed by an oral and maxillofacial radiologist. Four indices were measured to meet the purpose of this study: 1) the horizontal distance between the alveolar crest and mandibular canal (Type), 2) the angle of the mandibular long axis (Angle), 3) the bucco-lingual location of mandibular canal, and 4) the depth of the submandibular fossa. The averages and standard deviations of the measurements were compared according to the location (the first and second molar area) and sex of the patients. Results : Statistically significant difference was found in Type, Angle, and submandibular fossa depth between the first and second molar area (P<0.05). However, there was no significant difference between men and women in any of the measured indices. Most of the mandibular canals were located in lingual side of posterior mandible. Conclusion : More care should be taken when an implant is installed on the mandibular second molar area.

여고생의 아침식사와 라이프스타일, 외모 가꾸기 관심도 및 아침식사관련 태도의 관련성

이설미(Seolmi Lee),김미현(Mi-Hyun Kim) 한국영양학회 2020 Journal of Nutrition and Health Vol.53 No.3

본 연구는 아침결식률이 높은 청소년기 여고생을 대상으로 아침결식과 관련된 요인을 규명하고자 인천지역에 거주하는 여고생 581명을 대상으로 설문조사를 실시하고, 아침식사 빈도에 따라 주 2회 이하 아침식사를 하는 대상자를 아침결식군 (250명, 43.0%), 주 3회 이상 아침식사를 하는 대상자를 아침식사군 (331명, 57.0%)으로 분류하여 일반적 사항, 라이프스타일, 체중조절과 외모에 대한 관심도, 식행동, 아침결식의 원인 및 증상, 아침식사에 대한 태도를 비교 분석하였다. 연구대상자의 평균 연령은 16.5세였고, 아침결식군과 아침식사군의 평균연령 및 학년의 분포는 유의적 차이가 없었다. 아침결식 여부와 용돈 간에는 유의적인 관련성이 제시되어 아침결식군이 한 달에 사용한 용돈이 10만원 이상인 비율 (36.4%)에서 아침식사군 (22.1%)에 비해 유의하게 높았다. 취침 시간의 분포는 아침결식군과 아침식사군 간에 유의적인 차이가 없었으나, 기상 시간은 아침결식군이 아침식사군에 비하여 6시 이전에 일어나는 비율이 낮았고, 7시 반 이후에 일어나는 비율이 유의적으로 높았다. 등교 전 가장 많은 시간을 소요하는 활동에는 아침결식군의 경우 화장 등 미용이 38.8%로 가장 높은 비율을 보였고, 아침식사군의 경우 아침식사가 42.6%로 가장 높아 두 군 간에 유의적 차이를 보였다. 체중조절 관심도와 외모 가꾸기에 대한 관심도는 유의적인 차이를 보이면서 두 항목 모두 아침결식군이 높았다. 오후 간식과 야식, 편의점 편의식, 가공음료는 아침결식군이 아침식사군에 비하여 더 자주 먹는 것으로 나타난 반면, 저녁식사 섭취는 아침결식군이 아침식사군에 비하여 결식하는 비율이 높았다. 아침결식 이유로 아침결식군과 아침식사군 모두 시간이 없어서가 각각 72.3%, 74.1%로 가장 높았고, 군 간에 유의적인 차이를 보이지 않았다. 아침결식군의 경우 아침결식시 나타나는 증상으로 학습과 관련된 부작용인 수업시간에 졸림, 기억력 감퇴와 같은 증상을 호소한 비율이 아침식사군에 비하여 높은 반면, 아침식사군의 경우는 기운이 없고, 배가 아프거나 속쓰림과 같은 신체 증상을 호소하는 비율이 높았다. 아침식사에 대한 태도는 아침결식군이 아침식사군에 비하여 아침식사가 학습, 기억력, 건강에 미치는 중요성에 대한 인식이 낮았다. 이상과 같이 여고생의 아침결식은 늦은 기상 시간, 외모를 가꾸기를 위한 미용, 다른 식사의 불규칙성 및 간식, 편의식, 가공음료 등의 섭취 증가, 아침식사에 대한 잘못된 태도와 관련되어 있었다. 특히 아침결식률이 높은 여고생들은 바쁜 아침시간에 화장과 같은 외모 가꾸기에 많은 시간을 소요하며, 아침식사의 섭취를 소홀히 하는것으로 나타났다. 따라서 여자 청소년들을 대상으로 아침식사가 학습능률 향상 및 균형적인 영양섭취를 통한 건강증진과 건강을 기반으로 한 신체적 아름다움까지 영향을 줄 수 있음을 인식시키고, 아침식사의 중요성에 대한 인식과 태도를 향상시켜 아침식사 섭취를 능동적으로 실천할 수 있도록 하는 영양교육이 이루어져야 할 것이다. Purpose: This study examined the factors related to skipping breakfast in high school girls. Methods: A survey of a total of 581 high school girls residing in Incheon was conducted. The subjects were classified into 2 groups according to the breakfast frequency: “breakfast skipping” group (eating breakfast ≤ 2 times/week, n = 250) and “breakfast eating” group (eating breakfast ≥ 3 times/week, n = 331). This study compared the general characteristics, lifestyles, interest in weight control and beauty care, food habits, the reasons and symptoms of skipping breakfast, as well as the attitude toward breakfast between the 2 groups. Results: The mean age of the subjects was 16.5 years old. Approximately, 33.9%, 33.6%, and 32.5% of the subjects were in first grade, second grade, and third grade, respectively, with no significant difference between the 2 groups. The breakfast skipping group showed a high interest in weight control, and beauty care than the breakfast eating group. The breakfast skipping group consumed more afternoon snacks and late-night snacks, and ate dinner irregularly. Although the breakfast skipping group experienced the negative effects of skipping breakfast, they showed low recognition for the importance or role of breakfast. The most common reason for skipping breakfast was lack of time, which appears to be related to the late wake-up time and the time spent on make-up or beauty-care. Conclusion: Skipping breakfast by high school girls was related to a high interest in beauty care, irregular meals and low attitude toward the importance of breakfast for health and nutrition. Therefore, it is necessary to conduct nutrition education to change the perceptions and attitudes of female adolescents regarding the importance of breakfast by recognizing that breakfast can affect not only balanced nutrition and health, but also healthy physical beauty.

발효제를 달리하여 제조한 탁주의 휘발성 향기성분 분석

이설미 ( Sul Mee Lee ),한혜영 ( Hye Young Han ),이승주 ( Seung Joo Lee ) 한국산업식품공학회 2014 산업 식품공학 Vol.18 No.4

국내 탁주 제조에 사용되는 시판 발효제 4종을 선정하여 쌀을 원료로 탁주를 제조하고 이들 탁주의 이화학적 특성과 휘발성 향기성분을 분석하였다. 제조한 탁주의 알코올 성분은 발효제의 종류에 따라 차이를 보였는데 조효소제를 사용한 경우 알코올 함량이 15.66%로 가장 높게 나타났다. 총 산도의 경우 입국을 사용한 탁주에서 다른 시료에 비해 유의적으로 높은 수준을 나타내어 백국균을 사용한 입국이 유기산 생성능이 강해 산도가 높아지는 특성을 확인하였다. 탁주 4종에서 총 49개의 향기성분이 동정되었으며, esters 27종, acids 3종, alcohols 10종, 기타성분 11종이 확인되었다. 전통누룩으로 담금한 발효주에서 가장 많은 종류의 향기성분이 동정되었지만, 입국으로 담금한 발효주가 정량적으로 높은 농도의 향기성분을 포함하였다. 화학적 특성에 따른 성분들의 상대적 함량은 ester류 46.85%, alcohol류 49.05%, acid류 0.62%, miscellaneous 3.48%로 alcohol류가 가장 높게 나타났다. 발효과정을 거친 탁주의 향기성분은 극미량의 성분들이 상호 복합적으로 영향을 주고, 함량 및 종류에 따라 발효과정을 거치면서 다양한 변화를 가져올 수 있기에 복합적인 관계에 대한 규명이 필요하다. 향후 발효과정 중의 향기 성분 모니터링을 통해 향기성분의 생성과 변화에 대한 체계적인 연구가 필요하리라 여겨진다. In this study, four types of Takju (rice wine) were developed using different fermentation starters; two traditional nuruk (SS and SJ), one ipguk (JE), and one crude amylolytic enzyme (HK), respectively. Sample rice wines were analyzed for ethanol, titratable acidity, pH, soluable solids, and Hunter colorimeter values. The Takju made with HK showed the highest ethanol level, while the titratable acidity of Takju made with JE was twice that of the other samples. The volatile compounds in the four types of Takju were isolated by headspace-solid phase microextraction (HSSPME) and analyzed by gas chromatography-mass spectrometry (GC-MS). A total of 49 volatile components were identified, including 27 esters, 3 acids, 10 alcohols, and 9 miscellaneous compounds. Ethyl esters and alcohols such as ethyl hexanoate, ethyl octanoate, ethyl decanoate, 2-methyl-1-pentanol, 1-pentanol, isoamyl alcohol, and 2-phenyl ethanol were the largest groups among the quantified volatiles. Although the numbers of detected volatile compounds were similar in the four types of Takju, the amount of quantified volatiles showed a great difference among samples.

Orthopos$\textregistered$ 파노라마방사선촬영기의 각종 프로그램에 따른 흡수선량

최순철,이설미,Choi Soon-Chul,Lee Sul-Mi 대한영상치의학회 2001 Imaging Science in Dentistry Vol.31 No.4

Purpose: The objective of this study was to estimate the radiation absorbed doses in certain critical organs in the head and neck region with 16 imaging programs available on the Orthopos/sup (R)/ panoramic machine. Materials and Methods: A Rando phantom and LiF TLD chips were used for dosimetry. The absorbed doses were measured at the thyroid gland, the submandibular gland, the parotid gland, the mouth floor. the maxillary sinus, the brain, the mandibular body, the mandibular ramus. the 2nd cervical spine and the skin over TMJ area. Results : The overall absorbed doses with imaging programs available on the Orthopos/sup (R)/ panoramic machine were much less than that of standard program (program 1) except program 8, 11, and 16. Generally, the absorbed doses to the bone marrow of the mandibular ramus and the parotid gland were high, but the absorbed doses to the bone marrow in the mandibular body, brain, maxillary sinus, and, especially, the thyroid gland were very low. Conclusion : The modified imaging programs available on the Orthopos/sup (R)/ panoramic machine can be effectively used in aspect of radiation protection.