교정용 미니 임플랜트 고정원과 SWA en masse sliding retraction 시 전치부 치축 조절 요인에 관한 유한요소해석

정혜심,성상진,문윤식,조영수,임승민 대한치과교정학회 2006 대한치과교정학회지 Vol.36 No.5

교정용 미니 임플랜트 고정원을 이용한 교정 치료가 보편화되며, SWA와 이를 이용한 en masse sliding retraction은 임상에서 흔히 사용하는 치료법이 되었다. 그러나 고정원을 성공적으로 보존하려는 노력에 비해, 발치 공간 폐쇄 시 전치부 치축 조절에 관여하는 요인에 대한 보고는 아직까지 부족한 실정이다. 본 연구에서는 제1소구치를 제거한 상악 치아와 치주 인대 그리고 치조골에 대한 3차원 유한요소 기준모델을 제작하였고, 제1대구치와 제2소구치 사이 주호선 10 mm 상방에 식립된 교정용 미니 임플랜트를 고정원으로 사용할 경우, 측절치-견치 사이의 견인 훅의 높이를 변화시키며 후상방 견인력을 가하거나, 주호선에 보상 만곡을 부여하는 것이 전치부 치축 조절에 어떤 영향을 미치는지 시뮬레이션 하였다. 또한 전치부 치축이 설측 경사된 모델을 같은 실험 조건으로 시뮬레이션 하여 발치 공간 폐쇄 시 설측 경사된 전치부 치축을 유지하거나 개선할 수 있는 요인을 검토하였고, 다음과 같은 연구 결과를 얻었다. 2 mm 높이의 견인 훅에 대하여 후상방으로 견인력을 가할 경우 발생하는 함입력으로 인하여 전치부 설측 경사가 더 감소되지는 않았다. 견인 훅의 높이가 5 mm인 경우 후상방 견인력을 가하면, 측절치의 치관 순측 및 치근 설측 이동이 일어나고, 견치의 비조절성 후방 경사 이동이 심화되었다. 4 mm의 보상 만곡은 측절치의 치관 순측 및 치근 설측 이동을 일으키고, 견치의 비조절성 후방 경사 이동을 감소시켰다. 또한 전치부가 설측 경사된 모델을 기준모델과 같은 실험 조건으로 시뮬레이션 한 경우 치근면의 응력 분포와 25000배 확대된 그래프 상에서의 치아 이동 양상은 매우 유사하였다. 이상의 결과는 미니 임플랜트-SWA sliding 생역학을 구사 시 견인 훅의 위치와 와이어 상의 보상 만곡의 유무에 의해 전치부의 치축 조절이 달라지며 실제 임상에서 가이드라인으로 활용될 수 있을 것이다. Objective: With development of the skeletal anchorage system, orthodontic mini-implant (OMI) assisted en masse sliding retraction has become part of general orthodontic treatment. But compared to the emphasis on successful anchorage preparation, the control of anterior teeth axis has not been emphasized enough. Methods: A 3-D finite element Base model of maxillary dental arch and a Lingual tipping model with lingually inclined anterior teeth were constructed. To evaluate factors influencing the axis of anterior teeth when OMI was used as anchorage, models were simulated with 2 mm or 5 mm retraction hooks and/or by the addition of 4 mm of compensating curve (CC) on the main archwire. The stress distribution on the roots and a 25000 times enlarged axis graph were evaluated. Results: Intrusive component of retraction force directed postero-superiorly from the 2 mm height hook did not reduce the lingual tipping of anterior teeth. When hook height was increased to 5 mm, lateral incisor showed crown-labial and root-lingual torque and uncontrolled tipping of the canine was increased. 4 mm of CC added to the main archwire also induced crown-labial and root-lingual torque of the lateral incisor but uncontrolled tipping of the canine was decreased. Lingual tipping model showed very similar results compared with the Base model. Conclusion: The results of this study showed that height of the hook and compensating curve on the main archwire can influence the axis of anterior teeth. These data can be used as guidelines for clinical application.

무지구근의 운동단위수 추정

정혜심,윤여삼,손민균,김봉옥 大韓再活醫學會 1997 Annals of Rehabilitation Medicine Vol.21 No.6

複合格助詞にしての意味用法の分析

정혜지 대한일어일문학회 2006 일어일문학 Vol.30 No.-

Cavernous Hemangioma of the Uterus in a Postmenopausal Woman - A Case Report -

정혜라,조치흠,권상훈,권선영 대한병리학회 2011 Journal of Pathology and Translational Medicine Vol.45 No.5

Cavernous hemangioma of the uterus is an uncommon mesenchymal tumor. Most cases have been reported in young, pregnant women and the condition is very rare in a postmenopausal patient. An 81-year-old woman presented with a huge pelvic mass. Abdominal computed tomography and magnetic resonance imaging results suggested a leiomyoma with degenerative change and hemorrhage. Microscopically, large, thick-walled and variable-sized vascular channels were evident in the majority part of myometrium; the lining cells were immunohistochemically reactive for CD31. Vascular tumors of the female genital tract should be cautiously excised due to the profuse intra-operative bleeding. The pathological examination of a hysterectomy specimen is the only method to confirm the diagnosis of this tumor.

기관지천식 환자에서 소변내 leukotriene E4 측정의 의의

정혜리(H . L . Chung) 대한천식알레르기학회 2001 천식 및 알레르기 Vol.21 No.4

N/A

혈청 IgE의 임상적 의의

정혜리 대한소아청소년과학회 2007 Clinical and Experimental Pediatrics (CEP) Vol.50 No.5

Many previous studies have proved that human allergic disease resulted from the formation of antibodies belonging to a unique immunoglobulin isotype termed immunoglobulin E (IgE). Most of IgE- producing plasma cells are found in the lymphoid tissue associated with the gastrointestinal and respiratory tracts. IgE may be found free in the mucosal secretions of these tissues, bound to local mast cells, or distributed by the systemic circulation to mast cells and basophils throughout the body. Total serum IgE concentrations tend to be higher in allergic adults and children compared with non-allergic individuals, but the value of total serum IgE as a screening test for allergic disease is limited. Total serum IgE levels are related to the probability of an individual having detectable allergen-specific IgE. Allergen-specific IgE concentrations vary with a person's age, the degree and duration of the recent allergen or cross-reactive allergen exposure. The value of quantitative assays for allergen-specific IgE has been suggested in recent studies. Serum IgE increases in many non-allergic diseases, including infectious and parasitic diseases. The IgE changes appear to be specific to the infectious agents, whereas non-specific in other diseases. The increased serum IgE in some of these conditions probably results from alterations in immune function. This review summarizes the clinical significance of total and allergen-specific IgE examinations in allergic diseases.

Effectiveness of the Use of Standardized Vocabularies on Epilepsy Patient Cohort Generation

정혜실,이호영,유수영,황희,백현영 대한의료정보학회 2022 Healthcare Informatics Research Vol.28 No.3

Objectives: This study investigated the effectiveness of using standardized vocabularies to generate epilepsy patient cohortswith local medical codes, SNOMED Clinical Terms (SNOMED CT), and International Classification of Diseases tenth revision(ICD-10)/Korean Classification of Diseases-7 (KCD-7). Methods: We compared the granularity between SNOMED CTand ICD-10 for epilepsy by counting the number of SNOMED CT concepts mapped to one ICD-10 code. Next, we createdepilepsy patient cohorts by selecting all patients who had at least one code included in the concept sets defined using eachvocabulary. We set patient cohorts generated by local codes as the reference to evaluate the patient cohorts generated usingSNOMED CT and ICD-10/KCD-7. We compared the number of patients, the prevalence of epilepsy, and the age distributionbetween patient cohorts by year. Results: In terms of the cohort size, the match rate with the reference cohort was approximately99.2% for SNOMED CT and 94.0% for ICD-10/KDC7. From 2010 to 2019, the mean prevalence of epilepsy definedusing the local codes, SNOMED CT, and ICD-10/KCD-7 was 0.889%, 0.891% and 0.923%, respectively. The age distributionof epilepsy patients showed no significant difference between the cohorts defined using local codes or SNOMED CT, but theICD-9/KCD-7-generated cohort showed a substantial gap in the age distribution of patients with epilepsy compared to thecohort generated using the local codes. Conclusions: The number and age distribution of patients were substantially differentfrom the reference when we used ICD-10/KCD-7 codes, but not when we used SNOMED CT concepts. Therefore, SNOMEDCT is more suitable for representing clinical ideas and conducting clinical studies than ICD-10/KCD-7.

코로나19로 인한 평생교육 일본어 학습자의 비대면 온라인 화상수업 실태 및 만족도 조사

정혜지 일본어문학회 2022 일본어문학 Vol.97 No.-

The purpose of this study is to investigate status, satisfaction level, and improvements of untact instructions for the learners of Japanese who participated in lifelong education which was converted to non-face-to-face online classes due to the situation of the COVID-19 Pandemic. From the result of this research above, it may be summed up as follows. First, smartphones were the most frequently used devices for online course by the learners, followed by computers, laptops, and tablets in this order. Second, for technical problems that occurred during online untact instructions, the highest opinion was ‘lacking in coping ability’ followed by ‘lacking in internet information search’, ‘the access to the class website is difficult’, and ‘lacking in utilizing capability of a computer or an electronic equipment’ in this order. Third, the rate for overall satisfactions about the online non-face-to- face classes was 44.1%. Lastly, as a result of investigating the improvements for the good quality of online untact instructions, there were opinions such as ‘It needs more smooth interactions with the instructor’, ‘It is necessary to provide various learning materials’, ‘It would be better to develop a curriculum for learners to actively participate in a class’, and ‘When an Internet error occurs, a prompt and appropriate response is required’.

소아 천식에서 측정 기기에 따른 호기 산화질소 농도의 비교

정혜리 대한 소아알레르기 호흡기학회 2011 Allergy Asthma & Respiratory Disease Vol.21 No.1

평생교육에 참여하는 노인 학습자를 위한 일본어 교재개발 방안 연구

정혜지(Jung, Hye-Ji) 일본어문학회 2021 일본어문학 Vol.93 No.-

本研究では、大邱市所在の老人福祉館の生涯学習プログラムである初級日本語講座を受講している高齢学習者を対象にし、使用している教材に関する意見や学習ニーズを中心にアンケート調査をを行った。その結果に基づき、高齢学習者向けの初級日本語教材の開発方策に関するいくつかの提言を提示してみたい。 第一に、高齢学習者の身体的特性を反映して文字の大きさは市販教材より大きく鮮明にする。第二に、教材の内容を簡潔にし、本の厚さを薄くして高齢学習者の教材の携帯を容易にする。第三に、色彩と写真、挿絵を適切に用いて高齡學習者の学習内容の理解と共に興味を図る。第四に、パソコン使用が苦手な高齢学習者のために、MP3よりはオーディオ用CDを聞き取り練習用に提供する。第五に、初級学習者にとって特に難しい領域である日本語の漢字の音読、訓読のような漢字の読み方に関する詳細な説明が必要である。第六に、日本旅行に必要な旅行日本語表現や生活日本語表現など現地での意思疎通に役に立つ日本語のフレーズをシチュエーションごとに紹介して全ての単元に満遍なく構成する。第七に、日本文化の中で高齢学習者における興味の高い分野である日本文学や日本の歌などを教材の構成に含めるようにする。 This study conducted a survey of elderly learners who were taking beginner- level Japanese language courses at the Senior Welfare Centers in Daegu Metropolitan City, focusing on their learning needs, to explore an avenue to develop beginner-level Japanese language textbooks for the elderly learners. The results are summarized as follows. First, letters in the textbooks should be sufficiently large and clear. Second, the contents of the textbooks should be concise, and the textbooks should be thin to enhance their portability. Third, the textbooks should accelerate the learners’ understanding and arouse their learning motivations with appropriate uses of colors, photos, and pictures. Fourth, the textbooks should provide audio CDs for listening exercises for the elderly learners who were not proficient in using computers. Fifth, the textbooks should come with a detailed explanation about how to read Chinese characters, a particularly difficult practice for beginner-level learners. Sixth, the textbooks should be composed of expressions of practical conversation necessary for local communication, such as Travel Japanese expressions needed for a trip to Japan. Seventh, the textbooks should incorporate Japanese literature or songs, among various other Japanese cultures.