코골이와 폐쇄성 수면무호흡증 환자의 두부규격방사선사진 상의 특징 및 호흡장애지수와의 상관관계

최재갑,최정미,안형준,Choi, Jae-Kap,Choi, Jung-Mi,Ahn, Hyoung-Joon 대한안면통증구강내과학회 2001 Journal of Oral Medicine and Pain Vol.26 No.4

Objectives : The purposes of the study was to evaluate cephalometric characteristics in snorers and patients with obstructive sleep apnea (OSA) and to see any relationships between the cephalometric measurements and respiratory disturbance indices (RDI). Materials and Methods : Twelve snoring patients, 11 patients with OSA, and 10 normal subjects were included for the study. After taking a screening sleep study for a night to obtain RDI, $SaO_2$, and snoring index, a detailed cephalometric analysis was conducted to obtain SNA, SNB, SN-MP, IAS, MAS, SPAS, SAAS, Mn-H, and PNS-P. All the data were compared between groups. For a group including 12 snoring patients and 11 OSA patients, correlation coefficients were calculated between respiratory disturbance index and each item of cephalometric measurements. Results : The mandible and the maxilla are retropositioned. The oropharyngeal and hypopharyngeal airway is reduced in area and is a factor that could produce or enhance OSA symptoms. The hyoid bone is displaced inferiorly. The soft palate is significantly elongated. Conclusions : These data suggest that cephalometric evaluation could be useful to evaluate snoring and OSA patients, and to assist with the planning treatment for improvement of upper airway patency.

하악의 전방 이동이 상부기도의 용적에 미치는 영향

최재갑,기우천,강덕식,Choi, Jae-Kap,Kee, Woo-Cheon,Kang, Duk-Sik 대한안면통증구강내과학회 1999 Journal of Oral Medicine and Pain Vol.24 No.1

OBJECTIVES: This study was designed to measure the minimal cross-sectional areas and volumes of the pharynx in snoring patients and normal subjects and to see if there is an increase in the minimal cross-sectional areas and volumes of the pharynx with advancement of the mandible. METHODS: The pharyngeal computed tomography and 3-dimensional reconstruction were used to measure the cross-sectional areas and volumes of the nasopharynx, oropharynx, and hypopharynx with the jaw in normal position and in protrusive position in 7 patients with snoring and 7 control subjects while they were awake. RESULTS: The oropharynx was revealed to have the most narrow site in the pharynx and there was a tendency for the snorers to have a smaller nasopharyngeal and oropharyngeal cross-sectional area than normal subjects but not statistically significant. There were no significant differences in the volumes of the nasopharynx and oropharynx between the two groups. With advancement of the jaw the minimal cross-sectional area of oropharynx was significantly increased, and the volume was also increased but not significantly. The minimal cross-sectional areas and volumes of nasopharynx as well as hypopharynx were not significantly influenced by the advancement of the mandible. CONCLUSIONS: There was a tendency for snorers to have a smaller oropharynx than normal subjects and the oropharyngeal lumen was increased with the advancement of the mandible in both snorers and normal subjects.

우리나라 쟁기와 Plow의 견인저항(牽引抵抗)에 관(關)한 비교연구(比較硏究)

최재갑 ( Jae Kap Choi ) 한국농공학회 1970 韓國農工學會誌 : 전원과 자원 Vol.12 No.3

Korean Janggi and Western plow to have developed for a long time in the east and west were tested and compared in their draft resistance. The charaderistic of Korean Janggi and plow to be able to make deep plowing, on of the most important factors influeneed the increased yield, were ofserved. This study was undertaken to obtain these basic factors' to device and construct the deep plowing Janggi. The results were as follow; 1. The draft resistance of Korean Janggi far less than that of plow and on the dry field, the influence of soil moisture contant to the draft resi-stance was larger in the Korean Janggi than in the western plow, but on the rice paddy, there was not differences between them. 2. The plow was more stable than that of Janggi in their operation. 3. The relation ship between the specific draft resistance and plowing depth was shown bygthe carved equation. carved equation, K=Ax+B/x+C (K ; specific draft restance, x; plowing depth) A, B, C; Constant controled by soil and instrument factor) 4. Minimam values of the specific draft resistance were as follow; a. On the dry field; Korean Janggi; x = 8~14㎝ K=280~330gr/㎠ Westean plow; x=10~12 ㎝ K=480~490gr/㎠ b. On the rice paddy; Korean Janggi; x=8~12㎝ K=255~280 gr/㎠ Western plow; x=7~10㎝ K=415~420grc/㎡

구강내장치를 이용한 코골이 치료효과의 평가

최재갑(Jae-Kap Choi),기우천(Woo-Cheon Kee) 대한치과의사협회 2000 대한치과의사협회지 Vol.38 No.7

구강내 증상을 동반한 Sturge-Weber Syndrome의 임상 증례

최재갑(Jae-Kap Choi),정양수(Yang-Soo Jung),김선하(Sun-Ha Kim),권영미(Young-Mee Kwon) 대한치과의사협회 1989 대한치과의사협회지 Vol.27 No.6

한국이(韓國?)와 Plow의 발달과정(發達過程) 및 이(?)와 Plow의 각종토양조건하(各種土壤條件下)에서의 경심(耕深)과 견인저항(牽引抵抗)에 관(關)한 연구(硏究)

최재갑 ( Jae Kap Choi ) 한국농공학회 1976 韓國農工學會誌 : 전원과 자원 Vol.18 No.1

本論文은 北海道大學審査學位論文으로 總面數 143面인 英文으로 되어 있고 圖 48, 表 7, 文默 66付圖, 付表 20面이있음. Plow는 옛부터 發達한 農具이기 때문에 많은 硏究가 行하여졌지만 複雜한 物理性을 가준 土壤을 對象으로 하는 機械이기 때문에 未解決의 問題도 적지않다. 이牽引抵抗에 對하여 土壤의 種類 및 條件을 變更하면서 實際의 圃場에서 組織的으로 行한 實驗은 極히 적고, 하물며 우리나라의 쟁기에 關한 硏究는 거의없다. 本論文은 쟁기의 特徵을 究明하고, 그의 改良, 發達에 寄與하기 爲한 基礎資料를 獲得코저 實施한 것이다. 1. 쟁기와 플라우의 構造 및 그의 差異 特徵을 明白히하고 ?體에 걸리는 各種의 抵抗의 內容 또는 그 比率等에 對하여 過去의 硏究成果를 紹介하였다. 2. 發達史 ; 플라우는 B.C. 2000年頃에 鹿角, 木枝의 人力用의 耕耘用具에서 發達하고, 東洋?도 起源은 大體로 같고 發達過程이 다를 뿐이다. 쟁기는 揚子江沿岸에 起源을 가진 支那?가 新羅와 百濟에 導入되여 次次 發達하고, 地域的인 特徵을 가지게 되었다. 3. 本章은 쟁기의 牽引力에 關한 理論的解析을하고, 쟁기의 進行에 依해 層狀으로 剪斷되는 剪斷抵抗을 求하고 쟁기의 表面 및 地測板과 土壤과의 摩擦力, 그리고 土壤의 移動의 慣性力을 쟁기의 牽引抵抗에 關聯되는 主要한 "힘"으로 생각하고 進行方面, 垂直方面의 힘의 成分의 平衡을 考慮하여 式 10. 12를 유도 하였다. 4. 本場에서는 實驗計劃, 方法 供試機, 供試圃場等을 記錄하고, 畜力用의 쟁기와 플라우를 使用하여 田地 4種 畓 2種의 圃場에서 實驗하는데 牽引力計와 自動耕深測定器를 使用하였다. 5. 實驗結果 및 考察; 耕深과 牽引抵抗 Dp와의 關係는 式 10. 12와 갈이 表示되고, 實際의 諸値를 代入하여 理論式을 誘導하였으니 直線에 가까운 關係가 있고, 實驗結果는 조금 曲線에 가까워졌다. 그리고, 土壤의 物理性이 牽引力Dp에의 影響을 細密히 檢討하였다. 쟁기의 牽引比抵抗에 있어서도 式 12에서 K=AT+B/T +C로 表示할수 있기 때문에 最小値를 表示하는 耕深이 存在하고 이값은 쟁기나 플라우幅의 1/2 卽 10m程度이고 쟁기는 比抵抗이 0.llkg/㎠에서 0.39kg/㎠이였다. 그러나 이 比抵抗도 土壤의 物理性이 많은 影響을 미치고 있다. 6. 要約 및 結論 ; 以上의 章에서 檢討 考察한 結果만을 記載하고 플라우는 쟁기에 비해 牽引抵抗 및 比抵抗이 논에서나 밭에서 대로 나타난 것이 特異하다. 以上의 內容을 紙面關係로 3回에 거쳐 요약 發表합니다.

건조기(乾燥機) 고안(考案) 제작(製作)에 관(關)한 연구(硏究)

최재갑 ( Jae Kap Choi ) 한국농공학회 1975 韓國農工學會誌 : 전원과 자원 Vol.17 No.1

A newly devised dryer with heated air for the farm products, especially suited for high water content materials such as red pepper, Beer ground, each Vegetables, and Low water content materials such as Rough rice was tested for its thermal efficiency and drying mechanism, and the optimum conditions for each sample were established. In order to improve the present rural situation of drying farm products which entirely dependent upon natural solar radiation, a study upon an economic multi-parpose dryer was conducted. A series of drying tests were run first with red pepper which is one of the important cash crop in Korean farm. And successive series of tests were also run with such proaucts as garlic, sweet potatoes, green onion, radish, Beer ground and Rough rice. The results from the above experiment in drying system with heat dryer can be summarized as follows. 1. Drying duration could be shortened by the tempering effect in high water content crop such as red pepper and beer ground. 2. The color changes occured in around 20% water content in red pepper. The degree of color change was heavily affected by high temperature and short drying duration. 3. The drying condition of red pepper was most favourable at the temperature of 85℃ in early stage and 80℃ in middle stage and 75℃ at the final stage, and with the air rate of 0.81㎥/sec and with sample amount of 200kg. 4. The drying condition of Rough rice(I.R.667) was most favourable at the templature of 40℃ in early stage and 35℃ in middle stage and final stage and with the air rate of 0.2㎥/sec and with sample amount of 75kg. 5. In order to prevent the color change of red pepper and to assure high efficiency in drying mechanism, it was necessary to lower the temperature as the time passes in drying process. 6. For vege tables, the drying rate were short in early stage and there was also tempering effect. However, for garlics, Constant drying rates through the early and final stages were observed and there were no tempering effects. 7. The drying condition or capability were as follows; Sample drying temp(℃) amount of material(kg) drying time(hr) Red pepper 85 200 9 Garlic 85 150 7 Sweet potato 85 200 6 Green Onion 85 200 4 Carrot 85 200 4 Radish 90 250 4 Rough rice(I.R.667) 35 75 4 Beer ground 90 320 3 Considering the above result of experiments, if this kind of dryers were distributed Korean farm and the optimun process were practiced in rural area, it would certainly help them improving the qualites of their product preventing their undue losses, and thus assuring an increase of Korean farm income and promotion of their living standards.

한국이(韓國?)와 Plow의 발달과정(發達過程) 및 이(?)와 Plow의 각종토양조건하(各種土壤條件下)에서의 경심(耕深)과 견인저항(牽引抵抗)에 관(關)한 연구(硏究) (II)

최재갑 ( Jae Kap Choi ) 한국농공학회 1976 韓國農工學會誌 : 전원과 자원 Vol.18 No.2

측두하악장애의 치료를 위해 사용되는 물리치료의 이해

정재광(Jae-Kwang Jung),김지락(Ji-Rak Kim),변진석(Jin-Seok Byun),최재갑(Jae-Kap Choi) 대한치과의사협회 2021 대한치과의사협회지 Vol.59 No.10

Temporomandibular disorders are a collective term encompassing a variety of pathological conditions in the stomatognathic region, manifesting with the pain and dysfunction. Diverse modalities of physiotherapy are recommended for the relief of pain, the rehabilitation of function and the facilitation of injury recovery, which include the cryotherapy, thermotherapy, electrotherapy and phototherapy according to the physical properties of the applied therapeutic stimuli. Therefore, it is necessary for dental clinicians to understand the characteristics of each modality of physiotherapy for the proper application. This review focused on the clinical considerations for the careful application of physiotherapy, including the underlying mechanisms, the expected effects, indication, contraindication and caution.

Cephalometric Characteristics of the Patients with Developed Anterior Open Bite Following Anterior Disc Dislocation without Reductions

허윤경,최재갑,Hur, Yun-Kyung,Choi, Jae-Kap Korean Academy of Orofacial Pain and Oral Medicine 2006 Journal of Oral Medicine and Pain Vol.31 No.3

임상적으로 비정복성 관절원판전위로 진단된 3명의 환자에서 이들은 모두 물리치료, 약물치료만이 행해진 환자로 내원 중에 갑작스런 교합변화 및 전치부 개교합을 나타내었다. 종래에 알려진 개교합의 발생은 류마티즘 관절염이나 양측과두의 심한 퇴행성 변화가 있는 경우에 상당한 과두지지의 상실로 후방지지를 잃게 되어 구치들이 과도하게 접촉하고 전치 개교합이 발생될 수 있는 것은 이미 잘 알려진 사실이나, 과두지지의 상실이 없는 비정복성 관절원판전위만으로 특정 환자에서는 개교합의 발생이 가능하며 이는 구치부 치아의 증출에 의한 전치부 개교합이라 볼 수 없으며, 하악의 후하방 회전의 결과로 볼 수 있다. 이들 3환자들의 전체적인 골격적 특징은(1)구치부 앵글씨 1급 교합관계와 천피개 교합,(2)높은 하악하연각,(3)높은 하악각 등으로 봐서 상하악의 골격적 형태가 II급과 III급에 관계없이 수직적 성장이 강한 안모형태에서 갑작스런 개교합이 발생될 수 있으리라 생각된다. 앞으로 개교합이 발생되는 관절원판전위 환자에서 하악의 후하방 회전의 원인을 밝히고, 이러한 골격적인 특징이 측두하악장애의 원인 인자가 될 수 있는 지 더 많은 연구가 필요하리라 생각된다.