골격성 Ⅲ급 부정교합자의 정모 두부규격방사선 계측학적 특징

정송우,홍성규,김정기 대한치과교정학회 1999 대한치과교정학회지 Vol.29 No.3

골격성 Ⅲ급 부정교합 환자의 정확한 진단과 분석에 있어서 삼차원적인 골격부조화의 양상이나 안면부조화의 원인을 파악하는 것은 중요하다. 본 연구에서는 정모 두부규격방사선 사진 상에서 나타나는 골격성 Ⅲ급 부정교합자의 계측학정 특성을 파악하기 위하여, 양호한 안모와 교합을 가지는 성인 남녀 정상교합자 60명을 전후방적 부조화가 심한 Ⅲ급 부정교합을 가지는 성인 남녀 60명을 대상으로 측모와 정모 두부규격방사선 사진의 투사도를 작성하여 안면 폭경, 고경, 각각의 비율, 측모계측치에 대응되는 정모계측치의 비율을 구하였고, 각각의 계측치와 비율을 비교, 분석하여 다음과 같은 결론을 얻었다. 1. 골격성 Ⅲ급 부정교합자에서 골격의 전후방적 부조화는 정상군보다 상악골길이(Cd-A)가 짧은 것보다는 하악골길이 (Cd-Gn)가 긴 것에 기인하였다. 2. 골격성 Ⅲ급 부정교합자는 정상교합자보다 긴 안모를 가지는데, 이는 상안면고경(Cg-ANS)보다는 하아면 고경(ANS-Me), 특히 하악골 고경(Cd-Me)의 증가로 인한 것이었다. 3. 골격성 Ⅲ급 부정교합자의 폭경은 단지 여자의 상·하악 대구치간 폭경(U6-U6, L6-L6)과 하악폭경(Ag-Ag)만 정상교합자보다 컸을 뿐, 이외 어떤 폭경항목도 정상과 차이가 없었다. 4. 골격성 Ⅲ급 부정교합자의 하악골 길이의 증가는 안모의 고경 특히 하안면 고경의 증가로 나타나지만, 하아골 폭경에서는 나타나지 않았다. In proper diagnosis of skeletal ClassⅢ malocclusion, it was important to know the pattern of three dimensional skeletal & facial disharmony. The purpose of this study was to obtain P-A cephalometrice characteristics in skeletal ClassⅢ malocclusion comparing with normal occlusion. The samples were consisted of 120 subjects, divided into four groups : Male normal occlusion, Female normal occlusion, Male skeletal ClassⅢ malocclusion, Female skeletal ClassⅢ malocclusion. Posteroanterior and lateral cephalogram were taken from the subjects with a x-ray apparatus(ASHAI CS90SP, Japan) and traced on acetate paper with routine manner. The transverse and vertical values from posteroanterior cephalometry, the sagittal values from lateral cephalometry and their ratio were obtained. The results were as follows : 1. The anteroposterior discrepancy in skeletal ClassⅢ group was not due to short maxillary length(Cd-A), but to longer mandibular length(Cd-Gn) than normal occlusion group. 2. The faces of skeletal ClassⅢ group were longer than normal occlusion group. It was not due to increase of upper face height(Cg-ANS) but to increased of the lower face height(ANS-Me) especially mandibular height(Cd-Me). 3. There was no difference in the facial width values between normal occlusion group and skeletal ClassⅢgroup, except upper molar width(U6-U6), lower molar width(L6-L6) and mandibular width(Ag-Ag) of female skeletal ClassⅢ group which were larger than normal occlusion group. 4. The increase of mandibular length of skeletal ClassⅢ group was reflected in the increase of lower facial height but did not have an effect on the mandibular width.

어휘조직의 자율성에 대하여

정성윤 대구대학교 인문과학연구소 1995 人文科學硏究 Vol.13 No.-

This paper attempts to justify that the organization of a word is independently motivated and it is equipped with sufficient information ready to support its adjacent area(e.g. the sentence level). The theory is based on the assumption that the internal structure of a word comprises three substructures. I claim that these structures should be interpreted by context free methodology-an integrated lexical theory which in other words, means that the internal structure of a word should be elucidated by the Strong Lexicalist Hypothesis(SLH). Structure 1 represents morphological structure of a word, which necessarily bears its own iconicity. I estimate that, on the bases of word-based hypothesis, the applications of Truncation Rule(TR) and Allomorphy Rule(AR) are natural and productive for word derivation in both English and Korean. I propose that the definition of Base From for Word Formation Rule(WFR), stated in Aronoff(1976) as "a single already existing word" should be amended as "a stem bearing lexical category". In principle, I follow the theory that the organization of word structure is nonconcatenative(nonlinear) claimed by McCarthy(1979), Selkirk(1982), etc. The function of Structure 2 is (1) to express the relationship between Structure 1 and Structure 3 by means of association convention which connects Structure 1 to Structure 2 and lastly connects Structure 2 to Structure 3, and (2) to formulate the primary syllable structure. The syllabe in Structure 3 should be represented by binary branching tree advocated by Halle & Vergnaud(1980), Kaye & Lowenstamn(1981), etc. To prove that such structure is universal, I examplified with Korean words. I finally confirm that inflectional and derivational affixations are likely to be explained by a single integrated lexical theory, and in terms of organic functions of three substructures in a word the autonomy of word structure is thus justified.

전압제어 GIC를 이용한 대역 및 고역통과 필터의 특성 비교

송명석,노경호,김왕식,박종연 강원대학교 정보통신연구소 2004 정보통신논문지 Vol.8 No.-

In this paper, we have presented comparative characteristics of band-pass filter and high-pass filter using VCGIC(Voltage Controlled Genenalized Impedance Converter), which are the non-linearized VCR(Voltage Controlled Resistance) and the linearized VCR. We concluded that the linearized VCGIC circuit has the wide dynamic range and the improved linearity.

자질 삼투의 역할

정성윤 檀國大學校英美文化硏究所 1997 英美文化 Vol.6 No.-

In this paper, I firstly, examine the role of X-bar theory(including License Condition proposed by Lieber(1992) and Feature Percolation Convention of Lieber(1898, 1992) and Selkirk(1982), secondly, explore a number of issues in conjunction with feature percolation, and, finally, postulate concomitant convention of feature assignment to ø-affix for ø-affixation in exocentric compound, irregular verb(ablaut), category-changing word, etc. The main function of X-bar theory in morphology is to determine the position of HEAD in word structure(N,A,V) and, eventually, the category of head is percolated up to dominating node in accordance with the convention, These two devices are, therefore, necessary for explication the organization of word structure. However, due to limited function of the devices, it is incapable of projecting every propetry contained in each lexical entry. I argue that the headless words such as exocentric compound, irregular verb(ablaut) and category-changing word, etc., should be treated by means of ø-affixation for feature percolation and, to enhance this transaction, I establish category (and related feature) assignment operation of ø-affix prior to feature percolation.

한국적 영어교육을 위해 우선 정립해야 될 문제들 : 조기교육의 실시에 즈음하여

최승연 檀國大學校英美文化硏究所 1997 英美文化 Vol.6 No.-

고로슬래그-CaSO_4-NaOH 系의 수화반응

宋宗澤 단국대학교 1987 論文集 Vol.21 No.-

The kinetics and mechanism of the hydration of granulated blastfurnace slag-CaSO^4-Na-OH systems were studied by using the conduction calorimetry, XRD, TG-DTA and SEM. It was found that the hydration of granulated blastfurnace slag-CaSO^4-NaOH systems was affected by the amount of NaOH, and also the optimum content of NaOH for activating was found to be about 0.5%. Ettringite and C-S-H appeared to be the main products for up to 3d of hydration. Caso^4 was not only an activator for slag hydration but also a reactant in this hydration.

탄산음료 유발 법랑질 침식에 대한 항우식 제품의 예방 효과

송주현,김영재,김정욱,장기택,김종철,한세현,이상훈 大韓小兒齒科學會 2010 大韓小兒齒科學會誌 Vol.37 No.1

본 연구는 항우식 제품인 Casein phosphopeptide-amorphous calcium phosphate(CPP-ACP)를 포함하는 치아크림, 불소 바니쉬, 저농도 불소 양치액을 치아에 도포하는 것이 단시간 탄산음료에 의한 법랑질의 침식을 예방할 수 있는지 살펴보기 위해 계획되었다. 법랑질 시편에 다음과 같은 항우식 제품을 도포하였고, 인공타액에 24시간 보관한 후, 콜라에 1분 증류수에 1분씩 5회 번갈아 처리하였다. 1군: 대조군(무처치) 2군: CPP-ACP 치아크림군 3군: 불소 바니쉬군(1,000 ppm F) 4군: 저농도 불소 양치액군(227 ppm F) 5군: 불소 바니쉬 + CPP-ACP 치아크림군 6군: 저농도 불소 양치액 + CPP-ACP 치아크림군 미세경도와 침식깊이를 측정하였고, Quantitative light-induced fluorescence(QLF)를 이용하여 안정된 형광 격자에 대한 부피 형광 변화인 ΔQ를 측정하여 무기질 감소량을 평가하였다. 6일 동안 실험을 반복하여 다음과 같은 결과를 얻었다. 1. 미세경도는 1군≤2군≤4군<6군<3군≒5군 순이었다. 2. 평균 침식깊이는 5군≒3군<6군<4군≒2군≒1군 순이었다. 3. ΔQ는 1군≒2군≤4군≤6군≤3군≒5군 순이었다. ΔQ의 감소율은 1군과 2군, 4군과 6군, 3군과 5군이 각각 유사하였다. 4. ΔQ는 미세경도와 강한 양의 상관관계를 나타냈고(r=0.96, p<0.05), 침식깊이와는 강한 음의 상관관계를 보였다(r=-0.96, p<0.05). The aim of this study was to evaluate the preventive effect of commercially available anticariogenic products, specifically, the tooth cream containing Casein phosphopeptide-amorphous calcium phosphate(CPP-ACP), fluoride varnish and low-level fluoride mouthrinse on enamel erosion induced by carbonated beverage in a short period of time. Enamel specimens were treated as follows and were then kept in artificial saliva for 24 hours followed by further processing by alternately soaking them in Cola beverage and in distilled water for 1 minute each five times. Group 1: control group (no treatment) Group 2: tooth cream with CPP-ACP Group 3: fluoride varnish (1,000 ppm F) Group 4: low-level fluoride mouthrinse (227 ppm F) Group 5: fluoride varnish + tooth cream with CPP-ACP Group 6: low-level fluoride mouthrinse + tooth cream with CPP-ACP Microhardness and erosion depth were measured and the mineral loss of each specimen was evaluated by measuring the volumetric fluorescence change(ΔQ) against the stable fluorescent grid using quantitative lightinduced fluorescence(QLF). The experiment lasted for 6 days repeated each day. The results were as follows: 1. The microhardness was increased as follows: Group 1≤2≤4<6<3≒5. 2. The mean erosion depth was increased as follows: Group 5≒3<6<4≒2≒1. 3. The ΔQ was increased as follows: Group 1≒2≤4≤6≤3≒5. The decrement of ΔQ was similar between group 1 and 2, group 4 and 6 and group 3 and 5. 4. The ΔQ showed positive correlation with microhardness (r=0.96, p<0.05), while it was negatively correlated to erosion depth (r=-0.96, p<0.05).

영(Φ)접사의 활용과 자질삼투의 역할

정성윤 대구대학교 인문과학 예술문화연구소 1999 人文科學硏究 Vol.20 No.-

In this paper, I, firstly, examine the role of X-bar theory(including License Condition proposed by Lieber(1992) and Feature Percolation Convention of Lieber(1988, 1992) and Selkirk(1982), secondly, explore a number of issues in conjunction with feature percolation, and, finally, postulate concomitant convention of feature assignment for Φ-affixation in exocentric compound, irregular verb(ablaut), category-changing word, etc. The main function of X-bar theory in morphology is to determine the position of HEAD in word structure (N,A,V) and, eventually, the category of head is percolated up to dominating node in accordance with the convention. These two devices are, therefore, necessary for explicating the organization of word structure. However, due to limited function of the devices, it is incapable of projecting every property contained in each lexical entry. I argue that the headless words such as exocentric compound, irregular verb(ablaut) and category-changing word, etc., should be treated by means of Φ-affixation for feature percolation and, to enhance this transaction, I establish category (and related feature) assignment operating on Φ-affix prior to feature percolation.

아미노산의 라세미화 반응을 이용한 치아상아질로부터의 연령추정

송정화,황적준,김종열 大韓法醫學會 1993 대한법의학회지 Vol.17 No.2

For the estimation of age, the measuring of D/L ratio in racemization of aspartic acid(Asp) in human dentine can be used and it estimates age more accurate than the conventional physiological methods. In the natural state, the optical isomers of amino acid slowly undergo spontaneous, nonenzymatic racemization, so the detectable amount of D-enantiomer will be formed from pure L-isomer in dentine. This fact can be used to determine the age of living human and animals or the age of fossil bones. This study, therefore, was measured D/L ratio of aspartic acid in human dentines to estimate the age of each individual. The correlation of D/L ratio of aspartic acid with actual age was obtained as follows, The correlation value between the D/L ratio and the actual age was 0.9886, the standard estimated deviation(σ) was 2.07 years of age and the k(yr??) was 8.0×10??. The actual and the estimated ages coincided in 23% of the cases. The errors of ±1 year were 15%, that of ±2 years wee 40%, ±3 years 15%, ±4 years 4%, respectively. Errors of exceeding 5 years were not obtained.

Apert syndrome 환자의 제증상에 관한 증례보고 : A CASE REPORT

송수복,김정욱,김종철 大韓小兒齒科學會 2002 大韓小兒齒科學會誌 Vol.29 No.1

Apert syndrome은 첨두합지증(acrocephalosyndactly)중의 하나로, 1906년 Apert에 의해 보고된 증후군이며 관상봉합의 조기유합에 의한 첨두증(acrocephaly)과 합지증이 공존하는 선천성 유전 질환이다. 임상적으로 뾰족한 고깔모양의 머리형태를 하고 있으며, 손과 발이 합지증을 보이는 것이 가장 특징적이다. 상염색체 우성의 유전을 하며 중안면부의 발육부전으로 인한 안구돌출, 경도의 양안이개 및 상악골 발육부전을 나타내고, 고구개, 연구개열을 동반하는 경우가 있으며, 하악 발육은 정상이나 상대적으로 하악 전돌의 양상을 나타내고 좁은 상악과 하악궁에 심한 총생이 나타나고, 골격적 이상에 의한 부정교합과, 전방부의 개교를 유발한다. 본 증례는 성형외과에서 상악과 하악에 대한 교정적 처치의 가능성에 대하여 의뢰된 3세 1개월의 Apert syndrome 남아에 대한 것으로 의학적 기왕력과 향후 치과적 처치방향에 대해 과거의 문헌을 고찰하고, 교정적 진단과 치료계획의 수립과정 중에 다소의 지견을 얻었기에 이에 대해 보고하는 바이다. Apert syndrome is a kind of congenital-acrocephalosyndactyly syndrome which was first reported by Apert in 1906 and characterized b its acrocephaly and syndactyly. Clinical characteristic features are cone-shaped skull morphology due to early fusion of coronal suture, fusion of fingers of hands and toes of feet. It is an autosomal dominant-heritable syndrome. Due to hypo-development of midface region, Apert syndrome patients have a tendency to have ocular proptosis, hypertelorism, maxillary deficiency. High palate and soft palate cleft are common findings in these patients. In general mandibular growth pattern is normal, but relative maxillary deficiency exaggerates mandibular forward position, so relative mandibular prognathism is inevitable. Narrow maxillary and mandibular dental arch worsen teeth alignment and crowding. Skeletal malocclusion and open bite are also common. This is a case report of a Korean 3 year 1 month male Apert syndrome child referred by department of plastic surgeon for the possibility of orthodontic treatment. General features of Apert syndrome, patient's medical history, radiographic evaluation, clinical examination, orthodontic and surgical treatment planning are discussed in this report.