치면열구전색제와 유동성 복합 레진의 미세 경도 및 표면 조도의 비교

양규호,최남기,김선미,최지은 大韓小兒齒科學會 2009 大韓小兒齒科學會誌 Vol.36 No.3

본 연구는 예방적 레진 수복술에 전통적으로 사용되던 소와열구 전색제를 대신하여, 유동성 복합 레진이 사용될 경우의 타당성을 검토하기 위해 시행되었다. 비커스 미세경도를 측정하기 위해 직경 10 mm, 높이 3 mm인 11개의 시편을 제작하여 비커스 미세경도 측정기(FM-7, FUTURE-TEC Inc., Japan)를 이용하여 압입하중 50 gf, 유지시간 15초의 조건 하에서 측정하여 각 군의 평균값을 산출하였다. 표면조도를 측정하기 위해 칫솔마모시험기(Toothbrush abrasive machine K236, Tokyo Machine Co., Japan)로 4개의 시편 표면에 200 rpm의 속도로 4000회의 칫솔질을 시행한 뒤 표면조도형상측정기(Form Tahrsurf series 2, Rank Taylor Hobson Co., England)를 이용해 표면조도를 측정하였다. α=0.05의 유의 수준에서 Kruskal-Wallis rank test와 Mann-Whitney U test를 사용하였다. 또한 주사전자현미경으로 관찰하여 각 군의 마모 양상을 비교하여 다음과 같은 결론을 얻었다. 1. 비커스 미세경도 측정 결과 Filtek Z350 flowable(3M ESPE, U.S.A), Palfique Estelite LV(Tokuyama Dental, Japan), Ultraseal XT plus(Ultradent, U.S.A) 순으로 높게 나타났으며 모든 군 간에 통계적으로 유의한 차이가 있었다(p<0.0001). 2. 표면 조도 측정 결과, Ultraseal^(R), Estelite^(R), Z350^(R) 순으로 높게 나타났으나 통계적으로 유의한 차이는 없었다(p=0.116). 3. 마모되지 않은 표면과 마모가 일어난 표면을 주사전자현미경으로 관찰한 결과, 전색제인 Ultraseal XT plus와 유동성 복합레진인 Palfique Estelite LV, 나노필러를 함유한 유동성 복합레진인 Filtek Z350 flowable이 서로 다른 마모 양상이 나타나는 것을 볼 수 있었다. 이상의 결과를 토대로 할 때, 유동성 복합 레진이 전색제에 비해 물성적 측면에서 더 우수한 것으로 나타났다. This study was performed to compare the wear resistance of sealant and flowable resins for analyzing the effect of flowable resin as a sealant in preventive resin restorations. Specimens were made and Vicker's hardness number and surface roughness were measured. SEM observations of the polished and abraded surfaces were established. Kruskal-Wallis rank test and Mann-Whitney U test at the significant level of α=0.05 were used. The following results were obtained: 1. The microhardness was decreased among groups in following order: Z350(3M ESPE, U.S.A), Estelite(Tokuyama Dental, Japan) and Ultraseal(Ultradent, U.S.A). There were significant differences in all groups(p<0.0001). 2. The surface roughness was decreased among groups in following order: Ultraseal XT plus, Palfique Estelite LV and Filtek Z350 flowable, However, there is no statistically significant differences in roughness among Estellite, Z350 and Ultraseal at the significance level of α=0,05, with p=0.116 3. SEM observation of the unworn and worn surfaces revealed the qualitative differences in the wear appearance among groups. The results in this study indicate that flowable resin is better than sealant in aspect of physical properties.

자질유인이론적 접근에 따른 양화사 인상

김지숙,양선기 순천대학교 어학연구소 1999 어학연구 Vol.10 No.-

This paper aims to examine how to account for the difference between ambiguity and unambiguity of the scope shown in the quantifier structure. To distinguish ambiguity from unambiguity of scope by raising quantifier, we examine the data presented in Aoun & Li (1989), Aoun & Li (1993), and Pica & synder 91994). Finally, we will try to capture scope analysis by the quantifier raising in English under the Attract-F, minimalist framework. The paper is organized as follows. Section Ⅱ discusses the so - called quantifier raising as α-movement. In section Ⅲ we examine Aoun & Li's(1993) approach to the quantifier raising under economy principle. In section Ⅳ we treat the quantifier raising in terms of the Chain and Case assignment. The tentative results emerging from the minimalist framework, Attract-F theory on the quantifier raising are summarized in section Ⅴ and Ⅵ.

전신성 백색증(Oculocutaneous albinism) 환아의 증례 보고

최지은,최남기,김선미,양규호 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.4

백색증(albinism)이란 신체 내 melanin 합성의 부분적,혹은 완전한 결핍에 의해 일어나는 질환이다. Melanin은 신체 내에서 머리카락,눈,피부 등에 분포하기 때문에 백색증 환자는 밝은 금발이나 갈색의 머리카락과 하얀 피부,붉거나 갈색의 홍채를 갖는 특징적인 외모를 지닌다. 백색증 환자는 변이된 유전자 및 임상적 특징에 따라 크게 전신성 백색증,안성 백색증,부분적 백색증으로 나뉘며 그 밖에 많은 하위군이 존재하고 그에 따른 치료법이나 치과적 주의사항도 달라진다. 본 증례는치아의 발육지연 여부평가를 주소로 내원한정신 지체가 동반된 전신성 백색증 환아로서 치아발거 등의 관혈적 시술및 보존수복,공간유지장치 등의 치료를 통해 양호한 결과를 보였기에 이를 보고하는 바이다. Albinism is a disease caused by partial or complete failure of melanin production in the skin,hair and eyes despite the presence of normal number,structure and distribution of melanocytes. Typical aspects are white-colored skin,blonde-brown hair,blue-brown irides and a prominent red reflex. Three main categories of albinism are oculocutaneous,ocular and localized albinism,and also they are divided into many subgroups. Therefore, appropriate treatment plan and dental direction would be differentiated according to them. This case report was about oral conditions and treatment of the oculocutaneous albinism patient with mental retardation who was refered due to developmental delay of teeth and treated with teeth extraction,restoration and space maintenance etc.

건강한 성인에서 발병한 칸디다와 연관된 위궤양 1례

박지훈,이상혁,김희,이재호,박성재,지삼룡,양성연,박은택,이연재,설상영,정정명,강미선 白中央醫療院 2005 仁濟醫學 Vol.26 No.1

Fungus such as Candida albicans is a normal flora that is frequently found in the oral cavity, gastrointestinal tract, genitourinary tract, vaginal mucosa in a normal person. However, candida can cause opportunistic infection in an immune compromised host. Candidiasis has broad spectrum of disease from mucocutaneous infection to invasive or disseminated infection. But, it is rarely reported that candida is associaed with gastrointestinal tract disease in a healthy adult. The case of gastric ulcer associated with candida particularly in a health adult is reported with relevant literature.

영어의 구 강세와 리듬교체에 관한 연구

김지숙,양선기 순천대학교 어학연구소 1997 어학연구 Vol.8 No.-

Metrical theory is mainly concerned with the study of stress and rhythm. The regular repetition of English stressed syllables should be simplified by a rhythm rule. This paper aims to systematize English phrase stress and rhythm through some generalized rules, comparing metrical theory with optimality theory. In this paper, three metrical theories will be introduced to explain why such rhythmic alternation occurs. Relating to this, the bracketed-grid theory proposed by Hayes (1995) gives us the most appropriate explanation with the faithfulness condition and the continuous column constraint which are based on the principle of head-modifier projection. And then we will examine the alternation of English phrase stress applying the movement of English phrase stress to optimality theory.

광주광역시 치매의 유병률과 위험인자의 도시-농촌 지역 비교

신일선,김재민,윤진상,김석재,양수진,김웅장,이승현,강순아,곽지영,이형영 大韓神經精神醫學會 2002 신경정신의학 Vol.41 No.6

연구목적 : 본 연구의 목적은 광주광역시의 도시 및 농촌 지역에 거주하는 노인에서 치매의 유병률과 위험인자를 조사하고자 하였다. 부가적으로 이 두 지역간에 치매의 유병률과 위험인자를 비교하고자 하였다. 방 법 : 광주광역시의 전형적인 도시와 농촌지역의 65세 이상의 노인(N=1,598)을 대상으로, 2단계의 역학연구를 수행하였다. 1차 선별 단계에서는 38명의 훈련된 연구보조원이 대상노인을 면담하여, 사회인구학적 특징을 조사하고 한국판 간이정신상태검사(Korean version of Mini-Mental State Examination ; MMSE-K)로 평가하였다. 2차 임상 진단 단계에서는 1차 단계에서 MMSE-K 점수가 24점 이하인 노인(N=431)을 대상으로, 전문연구팀의 임상적 평가를 통해 치매를 진단하고 원인질환별로 알쯔하이머병(Alzheimer's disease ; AD), 혈관성 치매(vascular dementia ; VaD) 및 기타 치매로 분류하였다. 대상노인에서 치매의 유병률을 측정한 후, 광주광역시 전체 노인의 연령보정 유병률을 산출하였다. 전체 대상에서 AD의 위험인자를 조사한 후, 도시와 농촌군으로 나누어 분석을 다시 시행하였다. 결 과 : 1차 및 2차 단계의 참가율은 각각 71.0%(N=1,134) 및 83.2%(N=410) 였다. 연구 참여 노인(N=1,134)에서 전체 치매, AD 및 VaD의 유병률은 최소 각각 9.7%, 5.2%, 1.8%였다. 광주광역시 전체 노인의 연령 보정 유병률은 각각 10.7%, 5.7%, 1.9%인 것으로 산출되었다. AD의 독립 위험인자는 고령, 여성, 무학이었다. 도시와 농촌에 따른 유병률의 차이는 파악되지 않았다. 그러나 AD의 위험인자는 지역에 따라 차이가 있었다. 도시 노인에게는 무학만이, 농촌 노인에게는 고령과 여성인 경우가 독립 위험인자였다. 결 론 : 광주광역시 노인에서 치매의 유병률은 높았고, 이는 국내 다른 지역에서 수행된 선행연구 결과와 유사하였다. 알쯔하이머형 치매의 위험인자는 도시와 농촌에 따라 다른 결과를 보였다. 본 연구 결과는 한국에서의 치매의 실태를 반영하며, 치매의 적절한 관리와 예방을 위해서는 지역성 특성이 고려되어야 함을 시사한다. Objectives : The purpose of this study was to investigate the prevalence rate and risk factors of dementia in an urban and a rural sample of older persons in the metropolitan Kwangju area, Republic of Korea. In addition, the prevalence rate and risk factors of dementia between the two samples were compared. Methods : A two-phase epidemiological study of residents aged 65 or over(N=1,598) was conducted in a highly developed, urban and a non-contiguous, poorly developed, rural area of metropolitan Kwangju. In the first(screening) phase, 38 trained research assistants collectively peformed in-home interviews for all participants. Detailed sociodemographic characteristics were gathered and the Korean version of Mini-Mental State Examination (MMSE-K) was administered. In the second (diagnosing) phase, diagnosis of dementia was established for those scoring 24 or less on the MMSE-K in the screening phase(N=431), and etiological types of dementia were classified to Alzheimer's disease(AD), vascular dementia(VaD) or miscellanous type by two teams of experts. Prevalence rate of dementia was determined in the participants, and age-standardized prevalence rate adjusted by age distribution in metropolitan Kwangju was estimated. For AD, the risk factors were investigated in all participants, and analyses were repeated for the urban and rural samples separately. Results : The participating rates in the first and second phases were 71.0%(N=1,134) and 83.2%(N=410), respectively. In the participants, the prevalence rates of dementia(all types), AD and VaD were 9.7%, 5.2% and 1.8%, respectively. The age-standardized prevalence rates were 10.7%, 5.7% and 1.9%, respectively. Aging, female gender and no education(complete lack of formal education) were identified as independent risk factors for AD. No difference between the urban and rural samples was observed in the prevalence rates of dementia(all types), AD and YaD. However, risk factors for AD differed between these areas. In the urban sample, no education was the only significant factor ; whereas, aging and female gender were identified as risk factors in the rural sample. Conclusion : A high prevalence rate of dementia was observed among old persons in metropolitan Kwangju, consistent with previous studies conducted in other Korean areas. The risk factor profi1es for AD differed between urban and rural settings. The results of this study reflect the current status of dementia in Korea and suggests that appropriate management and prevention strategies for dementia should be tailored toward the geographic settings.

광주전남지역 정상신생아의 상부 구순 계측치와 형태에 대한 연구

조안영,양정열,이승찬,천지선 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.1

Background and objectives : The face is the one of the most variable parts of the body and characterized not only by separated part but also by interrelation of the parts. Especially, in the case of bilateral cleft lip and palate, compared with unilateral case, it is necessary to establish the facial anthropometry in newborns, because of current trend of early intervention, such as fetal surgery, lip adhesion, and nasoalveolar molding device. Millard presented the concept of rotation advancement for unilateral cleft lip repair, and, thesedays, this method of cleft lip closure is acknowledged as the most optimal principle. However, it can produce a scar that crosses the upper one third of the philtrum obliquely. The purpose of this study is to determine the configuration of the vermillion tubercle, the Cupid's bow, and the philtrum, and to suppose that which anthropometric data and proportional index could be significant to determine the configulation of the philtrum in case of bilateral cleft lip and other deformity, which can't identify the philtral shape. Materials and Methods : 74 newborn infants, who were full-term normal infant In Gwangju-Jeonnam area were examined from April to June 2003. Mean gestational ages were 39 weeks. Mean birth weight was 3.3 Kg. Five anthropometric data, which were base of columella to tubercle, nasal base to Cupid's bow peak, Cupid's bow to commissure, philtrum, peak to peak, and mouth width were measured. And the proportional indexes of each data were evaluated. Morphologic parameter, which were the shape of vermillion tubercle, the Cupid's bow, the philtrum, were analized. Results : Mean values of five anthropometric data were 14.1±2.2, 10.5±2.7, 16.5±2.5, 6.9±1.8, and 26.7±4.9 each. And the one of these, Philtral width, peak to peak, and 7 proportional indexes which were ①/④, ②/④, ③/④, ⑤/④, ④/③, ④/②, ④/① have a significance according to 3 types of the philtral shape. The most common shape of vermillion tubercle is protrusion type (89.2%), and that of Cupid's bow is normal type (52.7) and that of philtrum is parallel from nostril base to vermilion border (70.7%). Conclusion : My study supplies the plastic surgeon and others with specialized interests in the craniofacial surgical area with fundamental normative population data that will help them decide what IS abnormal. And corrective surgery of the face and cranium is becoming so precise that the techniques and data detailed in this paper are essential to its further development.

사무공간의 통합유니트 구축을 위한 조명유니트 도출에 관한 연구

김선숙,신선준,김지현,양인호,김광우 대한건축학회 2005 대한건축학회논문집 Vol.21 No.1

The purpose of this study is to develop the lighting units for workspace and to propose their application method at the architectural design stage The lighting unit is one of the components of a workspace integrated unit, which can be defined as the planning unit satisfying the environmental comfort criteria of workspace According to the survey of current domestic and foreign office buildings, the luminaire layout types could be classified into the line, spot and square type Various simulation cases were set up considering these layout types, architectural modules, and luminaire types Finally, forty-four lighting units were developed by RADIANCE simulation With these lighting units, the designer would be able to easily predict how his decision about architectural modules influences the lighting design, and can consider other alternatives

엄지손가락 과다증을 동반한 수열에서 이엽피판을 이용한 제 1 갈퀴막 공간의 재건

문재원,천지선,양정열 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.2

Cleft hand is a rare disease that is characterized by absence of one or more digits, It was introduced by Abroise Pare in 1575. The cause of this is not identified yet. Polydactyly is defined as normally pentadactylous hand with excess digits, It was reported that the possible cause of polydactyly is increased folding of AER(apical ectodermal ridge). There are so rare cases that cleft hand is accompanied with preaxial polydactyly. We experienced a case of cleft hand with preaxial polydactyly. That case had narrowing of first web space and thumb polydactyly. Untilil now, there have been so many methods of reconstruction of web such as skin graft, z-plasty, dorsal and volar flap, etc. We reconstruct the first web with bilobed flap elevated from polydactylized thumb. As it has good results of functional and cosmetic properties, It's very useful to use accessory tissue from polydactylized finger such as our case.

하악골 골절수술에서 흡수성 골고정장치의 유용성

문재원,천지선,양정열 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.2

Introduction: The mandible is one of frequent facial bone fracture due to anatomic configuration like the nose and zygoma. When the mandible fractures occured, displacement of segments developed by pulling of strong muscles. And so for reduction of fractured mandible, rigid fixation needs for prevention of displacement. Metal plates and screws are most appropriate device to obtain for prevention of displacement in case of mandible fracture. But metal devices are hampered by temperature sensitivity and interference with radio-graphic imaging, leading corrosion, inflammatory response, the effect of atrophy of cortical bone, the need for a subsequent operation for removal. To overcome drawbacks of metal rigid fixation devices, there had been a continuous research on the development of a bioabsorbable skeletal fixation system using polymers of polylactic and polyglycolic acid. Material and Method: One hundred sixty eight fractures of the mandible in 110 patients (84 male patients and 26 female patients) were treated by open reduction and internal fixation using bioabsorbable plates and screws (BiosorbFX^(R), Bionix Implants, Inc., Finland). The average age is 36.5 years old. Total number used absorbable devices and 972 (182 plates and 790 screws). Patients were evaluated during the follow-up period, which ranged from 1 to 30 months. Common fracture sites are para symphysis (26%), body (19%) and angle (18%) which are experienced. Intermaxillary fixation placed before operation but removed after internal fixation of absorbable devices. After 5 days from operation, temporomandibular joint movement are started. We encountered no significant intraoperative difficulties obtaining placement of the devices. Result: None of patients has been experienced any implant-related complication including fracture instability or relapse, or radiographic evidence of osteolysis except one case of delayed osteomyelitis and four cases of intraoral infections. Conclusion: Absorbable devices have many advantage, that are lower infection rates, satisfactory strength, no metallic irritation, no restrictive growth of the neurocranium in pediatric patients, only one surginal procedure. Absorbable devices have some problems, such as slow and expense. But we experienced good results using absorbable devices to mandible fracture, and these results indicate that the use of bioabsorbable implants can be considered routinely for the fixation of mandible fractures.