Long-term Stability after Reduction of Mandible Fracture by Keyhole Plate: Evaluation at the Time of Plate Removal

Cheon, Kyeong-Jun,Cho, Seoung-Won,Jang, Won-Seok,Kim, Ju-Won,Yang, Byoung-Eun Korean Association of Maxillofacial Plastic and Re 2020 Maxillofacial Plastic Reconstructive Surgery Vol.42 No.-

Background: Various types of miniplates have been developed and used for the reduction of facial bone fractures. We introduced Yang's Keyhole (YK) plate, and reported on its short-term stability. The purpose of this study was to evaluate the long-term stability of the YK plate, as a follow-up study, by examining the patients who had used the YK plate among the patients with the reduction of mandible fractures and who visited for plate removal. Methods: We reviewed the medical records of 16 patients who underwent mandibular fracture fixation using a YK plate (group I) and 17 patients who underwent mandibular fracture fixation using a conventional plate (group II). Assessment was then made on malunion, occlusal stability, discomfort during the application, and clinical symptoms. Results: From January 2015 to December 2017, a total of 36 patients underwent mandibular fracture surgery using a YK plate. A total of 16 patients received plate removal. Among them, 15 were male and 1 female. The average age was 26 years. The applied surgical sites were the 12 on mandibular angle, 4 on mandibular symphysis, and 2 on subcondyle. The application period of YK plate was an average of 335 days. During the same period, 45 people underwent surgery on the conventional plate. A total of 17 patients received plate removal. Among them, 15 were male and 2 females. The average age was 36 years. The applied surgical sites were the 8 on mandibular angle, 4 on mandibular symphysis, and 2 on subcondyle. The application period of the conventional plate was an average of 349 days. No malocclusion occurred at the time of removal, and occlusion was stable. No patient complained of joint disease or discomfort. Conclusion: The YK plate system, in which the screw was first inserted and the plate was applied, for clinical convenience did not cause any particular problem and no significant difference from the conventional plate.

거대 긴장성 낭종으로 내원한 폐 Langerhans 세포 조직주증

양석철,손장원,윤호주,신동호,박성수,함시영,장세진,박용욱 한양대학교 의과대학 2000 한양의대 학술지 Vol.20 No.1

Pulmonary Langerhans cell histiocytosis is a hetergenous group of conditions of unknown etiology characterized by an abnormal proliferation of antigen presenting cell of bone marrow derivation known as Langerhans cells that invade and destroy distal bronchioles. The outcome is highly variable, ranging from rapid spontaneous resolution to irreversible respiratory failure. We describe a patient with biopsy-confirmed pulmonary Langerhans cell histiocytosis who presented with large tension cyst, treated with pneumothorax tube with Heimlich flutter valve.

日本語 音聲敎育에 있어서의 が行子音 考察

梁元碩 慶尙大學校 1978 論文集 Vol.17 No.2

It is natural that everyone should want to speak and write, using the correct, excellent words, expressions, an dpronounciations so far as he has affection for his native lantguage. Japanese consonant "/g/" among Japanese 50 sounds is pronounced generally as [g] in initial sound, including words of onomatopoeia and foreign origni. But the same consonant is also pronounced as [g] and [?] when it comes between vowels or under the phonological circumstance of /-NgV/. The Japanese standard sound claims it to be pronounced as [?], but the Japanese young generation tends to pronounce as[g]. In this study I put stress upon the problem how we should distinguish such a contradictive tendency of "/g/" pronounciation in our class room. I picked up only /g/, because /g/ has really two kinds of pronounciations as [g] and [?] in the same phonological circuumstance, but that does not cause a semantic opposition. I tried make it clear in this study why we must choose as a standard pronounciation for studying Japanese language in Korean. I also collected the words which are pronounced as [g] between vowels from "Japanese pronounciation dictionary." I hope it will be put into practice in learning Japanese.

레진모형근관에서 엔진구동형 및 수동형 ProTaper 파일로 근관성형 후 근관형태 변화에 대한 비교연구

양인석,강인철,황윤찬,황인남,오원만 大韓齒科保存學會 2005 Restorative Dentistry & Endodontics Vol.30 No.5

본 연구는 형태 및 재질이 동일한 엔진구동형 ProTaper 파일과 수동형 ProTaper 파일을 이용하여 레진모형근관을 성형한 후 근관형태 변화를 비교 분석하고자 시행되었다. 본 연구에서는 레진모형근관으로 총 40개의 J자와 S자의 근관형태가 재현된 ENDO-TRAINING BLOC을 사용하였다. 근관 성형 기구로는 엔진구동형 Ni-Ti 파일로 ProTaper^(TM), 수동형 Ni-Ti 파일로 ProTaper^(®) For Hand Use를 사용하였다. 사용된 레진모형근관과 파일의 종류에 따라 10개씩 4개의 그룹으로 나누어 근관성형을 시행하였다. 근관 성형 전 · 후 이미지를 스캐너 (Color scanner, UMAX Techologies, Inc., USA)를 이용하여 얻은 후, Photoshop 7.0 프로그램 (Adobe System Inc., USA)을 이용하여 이미지를 중첩하였다. 이미지 분석 프로그램 (Image-Pro^(®) Plus, Media Cybernetic, USA)을 이용하여 치근단 쪽에서부터 0, 1, 2, 3, 4, 5, 6 및 7 ㎜ 수준에서 근관 성형에 따른 근관의 내측 및 외측 폭경의 변화량, 근관 총폭경의 변화량, 근관 중심축의 변위량을 측정하였다. 또한 근관 성형 시간을 기록하였다. 두 기구 사이의 유의성 검정을 위해 독립 표본 t-검정을 시행하여, 근관 성형 시 수동형 ProTaper 파일에 엔진구동형 ProTaper 파일에 비해 근관 중심축의 변위가 유의하게 덜 일어나며 근관의 원래 형태를 더욱 잘 유지할 수 있지만, 근관 성형시간은 길어질 수 있다는 결론을 얻었다. The purpose of this study was to compare the canal configuration after shaping by ProTaper rotary files and ProTaper hand files in resin simulated canals. Forty resin simulated canals with a curvature of J-shape and S-shape were divided into four groups by 10 blocks each. Simulated root canals in resin block were prepared by ProTaper rotary files and ProTaper hand files using a crown-down pressureless technique. All simulated canals were prepared up to size #25 file at end-point of preparation. Pre- and post-instrumentation images were recorded with color scanner. Assessment of canal shape was completed with an image analysis program. Measurements were made at 0, 1, 2, 3, 4, 5, 6 and 7 ㎜ from the apex. At each level, outer canal width, inner canal width, total canal width, and amount of transportation from original axis were recorded. Instrumentation time was recorded. The data were analyzed statistically using independent t-test. The result was that ProTaper hand files cause significantly less canal transportation from original axis of canal body and maintain original canal configuration better than ProTaper rotary files, however ProTaper hand files take more shaping time.

韓 ·日 兩國語의 呼稱에 對한 社會言語學的 考察 : 自稱 對稱을 中心으로 Largely on Oneself and the Other Person

梁元碩 慶尙大學校 1979 論文集 Vol.18 No.2

Though it can be said that the difficulties in learning of foreign languages arise from the different linguistic form and grammatical structure, the real factor of the difficulties may be the fact that it is difficult to understand the sociopsychological linguistic consciousness in the linguistic behavior of the people in question. While human thought is expressed in the objective and universal way in such languages as English, it is specifically expressed in the subjective way according to the environment in Korean and Japanese. This is aimed to study the Title of person( I(self) and You(the Prety)) related to the honorific expression in Korean and Japanese form a sociolinguistic point of view. We, first, intented to compare the forms of calling oneself and others in the home environment with the relationship between family members, and further, to examine wether the principle of home behavior hold in the social life. From this study we realized that two nations, Korean and Japan, share a great deal of the similarity in rank sense, especially of the upper and lower, which was caused by the class conciousness of the feudalistic social state and Confucian view of value acquired throgh their history. Another thing we can say is that their ways of expression are together dependent on a particular environment in the relationship between title and honorific expression, though they have a little difference. In addition, sociopsychological approach on linguistic behavior is required for further study.

Profile^(Ⓡ), ProTaper™ 및 K^(3TM) Ni-Ti파일의 과기구 조작이 치근단공 변위에 미치는 영향

양현,양인석,황윤찬,황인남,윤숙자,김원재,오원만 대한치과보존학회 2007 Restorative Dentistry & Endodontics Vol.32 No.2

본 연구는 ProFile, ProTaper 및 K^(3)를 이용하여 과잉 기구 조작에 의해 근관 성형 시 근관의 만곡형태와 Ni-Ti 파일의 종류에 따라 치근단공이 어떻게 변위 되는지를 비교 분석하고자 시행되었다. 본 실험에서는 레진모형근관으로 J자와 S자의 근관 형태가 재현된 ENDO-TRAINING BLOC을 사용하였다. 근관 성형 기구로는 ProFile^(®), ProTaper™, K^(3TM)를 사용하였다. 총 60개의 레진모형근관을 사용하였으며, 사용된 레진모형근관 및 Ni-Ti 파일의 종류에 따라 10개씩 6개의 군으로 나누어 근관성형을 시행하였다. 근관 성형 전·후 이미지를 Image-analyzing microscope 100X를 이용하여 얻고 Photoshop 7.0 프로그램을 이용하여 중첩하였다. 이미지 분석 프로그램을 이용하여 근관 성형 전·후 치근단공의 중심으로부터의 직경 변화량과 면적을 측정한 결과 만곡된 근관의 성형시 치근단공이 주로 만곡의 외측으로 변위됨을 나타내며 ProFile이 ProTaper나 K^(3) 보다 통계적으로 유의성이 있게 작은 변화량을 나타내어 근관성형시 바람직한 기구임을 시사한다. This study was done to evaluate transportation of the apical foramen after 0.5 mm overinstrumentation by ProFile, ProTaper and K^(3) in simulated resin root canal. Sixty simulated resin root canal with a curvature of J and S-shape were divided into two groups. Each group consisted of three subgroups with 10 blocks according to the instruments used: ProFile^(®), ProTaper™, and K^(3TM). Simulated resin root canal was prepared by ProFile, ProTaper and K^(3) with 300 rpm by the crown-down preparation technique. Pre- and post-instrumentation apical foramen images were overlapped and recorded with Image-analyzing microscope 100X (Camcope, Sometech Inc, Korea). The amounts of difference in width and dimension on overlapped images were measured after reference points were determined by Image Analysis program (Image-Pro^(®) Express, Media Cybernetic, USA). Data were analyzed using Kruskal-Wallis and Mann-Whitney U-test. The results suggest that ProFile showed significantly less canal transportation and maintained original apical foramen shape better than K^(3) and ProTaper.

한국 성인에서 이하 두정 방사선 계측사진 분석

남동석,서정훈,양원식,장영일 대한치과교정학회 2000 대한치과교정학회지 Vol.30 No.1

교정 치료계획을 세우기 전에 부정교합에 기여하는 안면 비대칭의 정도를 정확히 평가하는 것은 무엇보다도 중요하다. 안면 비대칭의 진단은 주로 정모, 이하 두정, 두정 이하 방사선 사진이 이용되고 있다. 이중 이하 두정 방사선 사진은 반복재현성이 떨어지고 연구자료와 적절한 분석방법이 없다는 이유로 많이 사용되지 않고 있다. 이에 이 연구의 목적은 교정환자나 악교정 수술을 요하는 환자의 치료를 위하여 임상적으로 이용할 수 있는 이하 두정 방사선 계측사진의 분석방법을 개발하고 한국 성인에서의 정상치를 얻는데 있다. 연구 대상은 조화를 이루고 균형 잡힌 안모를 가진 교정치료 경험이 없는 40명의 성인을 대상으로 하였으며, 이하 두정 방사선 사진을 촬영하여 2개의 각도계측 항목과 9개의 선 계측항목을 측정하였다. 이하 두정 방사선 사진 분석에서 정상인에서 하악체의 길이는 좌, 우측 차이를 발견할 수 없었으나 정모, 측모 방사선사진의 계측 값과는 큰 차이를 보여, 비대칭의 절대적 양의 측정에는 어느 정도 한계가 있다. 기준선에 대한 좌, 우측 비교는 기준선을 설정하는 방법에 따라 큰 차이를 보였다. 과두의 위치 평가는 f. spinosum을 연결한 선의 수직이등분선을 정중선으로 사용하는 것이 가장 작은 편차를 보였으며, 상, 하악의 skeletal midline과 dental midline의 일치 여부 등을 판단할 때는 crista gli와 anterior process of atlas와 같이 midsagittal line상에 위치하는 구조물을 이용하여 정중선을 설정하는 것이 가장 작은 편차를 보였다. 그리고 하악 과두 및 하악체의 형태이상을 관찰하는데는 매우 높은 진단적 가치를 가지고 있다. 그러므로 이하 두정방사선사진의 한계를 정확히 이해하고 정모, 측모 두부방사선사진과 함께 비대칭 분석에 이용한다면 보다 정확하게 비대칭 부위와 정도를 측정하는 데 도움이 될 것이다. It is important that the orthodontist accurately assess the degree to which facial asymmetry contributes to a given malocclusion before treatment planning. P-A, submentovertex and verticosubmental view have been used in the assessment of facial asymmetry. Among them, submentovertex view is rarely used because it has low reproducibility and is short of normal data and proper analysis method. The purpose of this study was to develop a submentovertex cephalometrics and obtain normal data in Korean adults. The subjects consisted of 40 normal adults (male : 22, female : 18) without the experience of orthodontic treatment. We find the 2 angular and 9 linear measurements. Though submentovertex cephalomentrics has the limitation in comparing the absolute length between right and left, it is useful to examine the relationship of skeletal and denial midline, the shape and location of condyle head and the shape of mandibular body in submentovertex view. Therefore, if we understand the limitation of submentovertex cephalomentrics and use lateral, P-A and submentovertex cephalomentrics together, we will measure the location and amount of skeletal disharmony more exactly.

만성기침을 하는 10세 이하의 소아에서 알레르기 요인과 MAST와의 연관성

이원희,양은석 朝鮮大學校 附設 醫學硏究所 2008 The Medical Journal of Chosun University Vol.33 No.3

목적: 최근 알레르기 질환의 증가와 더불어 만성 기침의 원인 중에서 알레르기 질환의 비율도 증가하고 있다. 만성 기침은 환아 부모님들의 걱정을 유발하여 불필요한 항생제 치료를 증가시키고 있다. 따라서 만성 기침을 하는 소아에서 알레르기 질환을 감별하는 것은 정확한 진단뿐 만 아니라 효과적인 예방 및 치료를 가능하게 한다. 본 연구의 목적은 MAST 양성률과 알레르기 요인과의 관계성을 알아보고 또한 연령과의 연관성이 있는지도 알아보고자 하였다. 방법: 2002년 3월 부터 2006년 6월 까지 만성 기침을 주소로 조선대학교 병원 소아과에 입원한 1세에서 10세 사이의 소아를 대상으로 설문 조사와 혈액 검사를 시행한 45명을 대상으로 하였다. 설문 조사를 통해 아토피 피부염의 병력, 세기관지염의 병력, 알레르기 질환의 가족력, 가족 구성원 중 흡연자의 유무, 가정 내 애완동물(개, 고양이)의 유무, 카페트 사용 여부에 대해 조사하였고 MAST와 총 IgE 값과 호산구수를 측정하였다. 결과: MAST 결과 북아메리카 집먼지 진드기에 양성을 보인 경우는 55.5%로 가장 높았고 집먼지가 45.6%, 유럽 집먼지 진드기는 애완동물은 28.8%, 음식물은 26.7%였으며 MAST 결과가 양성인 26명과 음성인 19명을 두군으로 나누어 비교하였을 때 MAST 양성군에서 나이가 7-10세로 많은 경우는 12명이었으며 MAST 음성군은 1명으로 유의한 차이를 보였고(P= 0.009), 아토피 피부염은 19명과 4명으로 유의한 차이를 보였으며(P= 0.022), 알레르기 질환의 가족력도 25명과 6명으로(P= 0.008) 유의한 차이를 보였다. MAST 양성군 29명의 총 IgE 평균값은 896.9 ± 922.4 IU/mL, MAST 음성군 16명의 총 IgE 평균값은 101.4 ± 129.4 IU/mL로 두 군 간에 유의한 차이를 보였으며(P< 0.001), 호산구수는 두 군에서 각각 405.4 ± 349.7 /μl와 240.6 ± 237.2 /μl 로 두 군 사이에 유의한 차이를 보이지 않았다(P= 0.1). 결론: 3주 이상의 만성 기침을 한 환아에서 MAST 양성률은 연령(7-10세), 아토피 피부염의 병력, 알레르기 질환의 가족력과 높은 연관성을 보여 알레르기 질환에 대한 적절한 검사와 치료가 필요할 것으로 생각된다. Purpose: The recent increase in the incidence of allergic diseases coincides with the increased proportion of allergic diseases as the cause of chronic cough. This has led to the anxiousness of parents about their children with the use of antibiotics in the majority of the cases. Therefore, the differentiation of the cause of the chronic cough will lead to the decrease of unnecessary treatment with effective prevention and treatment. The purpose of this study is to identify the correlation between allergic factors and Multiple Allergosorbent Test (MAST). Method: A total of 45 children between the ages of 1 through 10 years with at least 3 weeks of chronic cough were included in the study. MAST, eosinophil count and total IgE were tested. The patient's personal history of atopic dermatitis, bronchiolitis, family history of allergy, smoking by family, pets and floor covering of the home were reviewed extensively. Results: Twenty-six children of 46 children (68.9%) were tested positive for MAST and 19 children were tested negative. The factors that were strongly correlated to the results of the MAST were the age (7-10 years), history of atopic dermatitis, family history of allergy and total IgE. However, smoking by family, pets, floor coverings of the house and eosinophil count were not relevant to the results of the MAST. Conclusion: I could identify significant contributors through MAST in chronically coughing children and it will lead to improve them with good treatment result.

Terfenadine과 Ketoconazole 병용투여에 의해 유발된 Torsade de Pointes1예

오석규,국향,임수빈,정진원,박양규,박옥규 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.3

安城川의 流量變化에 따른 水質 汚染度

安元植,梁祐碩 수원대학교 산업기술연구소 1995 산업기술연구소논문집 Vol.10 No.-

Generally, as the fluid volume increases, the degree of contamination should decreases. However in the target area of this study which involves Anseong River, as the fluid volume increases from the draught vol., degree of contamination has increased also. The results of this study has been found as the following. 1) As the fluid vol., increases from low flow vol., average flow vol., self-purification capacity of the river increases and the degree of contamination shoud decrease. But as the fluid vol. increases, we see that the degree of contamination increases prapartionately and this is assumed to be due to NPS and the phenomenon of flatation of contamination sediments on the bottom of the river. 2) We are able to determine the flow in propotion to quality of load quantity through an anniversary of analysis revealed linear relationship. 3) Using an anniversary of analysis, we were able to predict seasonal amount of floating contaminants per fluid vol. 4) Using this result, we determined the amount of diluting agent (base on the 2nd. degree of water according to Environment preservation directive) to be increasing in linear relation to the fluid vol. of the river and seasonal changes would be expected to have a similar effect.