한국 어린이의 골 성숙도와 치아 석회화 단계 간의 상관관계

김성진,송제선,김익환,김성오,최형준,Kim, Seong Jin,Song, Je Seon,Kim, Ik-Hwan,Kim, Seong-Oh,Choi, Hyung-Jun 대한소아치과학회 2021 大韓小兒齒科學會誌 Vol.48 No.3

이 연구의 목적은 한국 아동의 골 성숙 단계와 여러 치아들의 석회화 단계 간의 상관관계를 알아보고자 하는 것이다. 만 6 - 14세의 남아 359명, 여아 384명의 수완부 방사선사진, 측방두부규격 방사선사진, 파노라마 방사선사진을 분석하여 평가하였다. 하악 좌측의 7개 영구치의 치아 석회화 단계는 Demirjian이 제시한 방법에 의해 평가되었다. 골 성숙도 단계를 평가하기 위하여 수완부 방사선 사진은 Fishman이 제시한 skeletal maturity indicators(SMI)에 따라 평가되었고, 측방두부규격 방사선사진은 Baccetti가 제시한 cervical vertebral maturation(CVM) 방법에 따라 평가되었다. Spearman의 순위상관분석을 시행한 결과 치아 석회화 단계와 골 성숙도 간에 유의미하게 높은 상관관계가 나타났다(r = 0.40-0.84, p < 0.001). 7개의 영구치 중에서 하악 제2대구치가 골 성숙도와 가장 높은 상관관계를 보인 반면 중절치가 가장 낮은 상관관계를 나타내었다. 남녀 모두에서 하악 견치의 stage G와 하악 제2대구치의 stage F가 SMI 6단계와 CS 3단계에서 나타날 확률이 가장 높았다. 이 연구의 결과에 따르면 치아 성숙도와 골 성숙도 사이에 높은 상관관계가 있으므로, 파노라마 방사선사진에서의 치아 성숙도 평가는 성장기 아동의 골 성숙도를 평가하는 보조적 수단으로 활용될 수 있다. The aim of this study was to investigate the relationships between the stages of calcification of various teeth and skeletal maturity stages among Korean subjects. The samples were derived from hand-wrist, panoramic radiographs, and lateral cephalograms of 743 subjects (359 males and 384 females) with ages ranging from 6 to 14 years. Calcification of seven permanent mandibular teeth on the left side were rated according to the system of Demirjian. To evaluate the stage of skeletal maturation, hand-wrist radiographs were analyzed by skeletal maturity indicators (SMI) system of Fishman and lateral cephalograms by cervical vertebral maturation (CVM) method of Baccetti. Statistically significant relationships were found between dental calcification and skeletal maturity stages according to Spearman rank-order correlation coefficients (r = 0.40-0.84, p < 0.001). The second molar showed the highest correlation and central incisor showed the lowest correlation for female and male subjects. For both sexes, canine stage G and second molar stage F were related to SMI 6 and CS 3. Because of the high correlation coefficients, this study suggests that tooth calcification stages from panoramic radiographs might be clinically useful as a maturity indicator of the pubertal growth period in Korean patients.

Planetary milling에 의한 $TiN_x$의 제조

김성진,김동식,라노,박성범,권원일,김문협,우흥식,안중호,Kim, Sung-Jin,Kim, Dong-Sik,Rahno, Khamidova,Park, Sung-Bum,Gwon, Won-Il,Kim, Moon-Hyup,Woo, Heung-Sik,Ahn, Joong-Ho 한국결정성장학회 2005 한국결정성장학회지 Vol.15 No.3

[ $TiN_x$ ] powder have been fabrication by making of reaction between titanium powder and $Si_3N_4$ bowl during a planetary milling. Milling times were maintained for 1 hour, 5 hours, and 10 hours, respectively. The XRD result showed existence of non-stoichiometric compound of $TiN_{0.26}$ after 5 hours milling and coexistence of TiN with $TiN_{0.26}$ after 10 hours milling. Particle size distribution was investigated by particle size analyzer and microstructure was analyzed by FE-SEM. The size of titanium was decreased with increasing the milling time and the mean size of $TiN_x$ after 10 hours milling was increased by 200 nm. Planetary milling법을 사용하여 Ti 분말과 $Si_3N_4$ bowl과의 반응을 유도하여 $TiN_x$을 제조하였으며, 이때 milling 시간은 1시간, 5시간, 10시간으로 조정하였다. 시편의 물성평가는 X선 회절분석을 통해 결정상의 변화를 분석한 결과 milling 시간이 5시간이 되면 비화학당량적 화합물인 $TiN_{0.26}$가 먼저 생성되고 10시간의 milling에서는 $TiN_{0.26}$과 TiN이 혼재되어 있는 것으로 확인되었다. 입도분석 및 FE-SEM으로 미세구조 분석을 한 결과, milling 시간이 증가함에 따라 Ti 입자사이즈가 감소하는 것으로 나타났으며, 10시간의 milling에서는 평균사이즈가 200nm의 $TiN_x$를 제조할 수 있었다.

한방의료이용 행태와 이에 영향을 미치는 요인 분석

김성진,남철현,김재돈,김병화,김기열,Kim Sung-Jin,Nam Chul-Hyun,Kim Jae-Don,Kim Byoung-Ha,Kim Gi-Yeol 대한예방한의학회 2004 대한예방한의학회지 Vol.8 No.1

This study was conducted to analyze community residents' behavior of Oriental medicine utilization and its related factors in order to provide basic data for formulation of policies on Oriental medicine. The subjects of this study was 500 residents who lived in big or medium sized cities and towns or villages Data were collected from March, 2002 to June, 2002. The results of this study can be summarized as follows. 1) According to socio-demographic characteristics of the respondents, female was 50.3%; 'over 50 years old' 29.9%, 'over college graduate' 39.7%, 'housewife' 23.0%, 'having spouse' 62.1%, 'Buddhist' 50.8%, 'living in big cities' 59.0%, 'middle economic class' 88.1%. 2) The highest proportion of frequency of Oriental medicine utilization was over 10 times(32.5%). The respondents visited Oriental medicine institutions for taking invigorant(51.1%), treatment of diseases in muscle or bone system(30.8%), treatment of diseases in digestive system(6.3%), etc. 3) According to the reasons of utilizing Oriental medicine, the proportion of good effect was highest(36.3%). 66.8% of the respondents replied that Oriental medical fee was expensive, while 0.8% of them replied that it was not expensive. 33.3% of them thought it was proper. 4) 35.5% of the respondents replied that treatment by Oriental medicine could cause side effect and 40.3% of them replied that the side effect could be caused by taking herb medicine. 5) 62.8% of the respondents replied that they would continuously receive opinions on Oriental medicine. The score of knowledge level of treatment by Oriental medicine $6.25{\pm}2.82$ points on the basis of 14 points. 6) The variables significantly influencing utilization of Oriental medicine includes taking diseases, living in big cities, male, upper (economic class, having religion, and effect of Oriental medicine. 7) The factors affecting effect of herb medicine were effect of treatment by Oriental medicine, marital status, knowledge level of Oriental medicine, having diseases, and frequency of receiving the treatment.

동물성 수산식품 중의 Sterol 조성과 Cholesterol ${\Delta}^7$-dehydrogenase의 존재에 관한 연구

김성진,조용계,Kim, Seong-Jin,Joh, Yong-Goe 한국응용과학기술학회 1993 한국응용과학기술학회지 Vol.10 No.2

Levels of sterols including ${\Delta}^7$-dehydrogenase isolated from the tissues of marine animal products (20 species) were determined on 1.5% OV-17 columm of gas-liquid chromatography. The composition showed that the mussels and clams contained various sterols in their tissues : cholesterol, brassicasterol. 24-methylenecholesterol with some minor components such as 22-trans-norcholesta-5,22-dien-3${\beta}$-ol, 22-cis-dehydrocholesterol, 22-trans-dehydrocholesterol, desmosterol, 7-dehydrocholesterol, campesterol, stigmasterol, ${\beta}$-sitosterol, isofucosterol, and 7-dehydrocholesterol which could be converted into vitamin $D_3$ in the skin tissue of animal was present in the muscle of oyster, Crassostrea gigas. On the other hand, the others including gastropoda were predominantly composed of cholesterol. The minor sterols such as 24-methylenecholesterol, stigmasterol and ${\beta}$-sitosterol in the fish intestines are supposed to be derived from dietary plankton. Cholesterol ${\Delta}^7$-dehydrogenase which could convert cholesterol into ${\Delta}^7$-dehydrogenase was present in the pickles of Tricurus haumela intestine.

청소년기 여아에서 만성적인 좌측 측복부 통증으로 진단된 골반울혈증후군 1례

김성진,심혜선,강성길,손병관,이병익,조순구,이지은,Kim, Sung-Jin,Shim, Hae-Sun,Kang, Sung-Gil,Son, Byong-Kwan,Lee, Byong-Ik,Cho, Soon-Ku,Lee, Ji-Eun 대한소아신장학회 2007 Childhood kidney diseases Vol.11 No.1

측복부 통증은 신, 상부 요로계 질환의 대표적인 척도로 여겨지나 드물게 골반울혈증후군도 감별해야 한다. 골반울혈증후군은 가임기 경산부 여성에서 호발하나 소아청소년기에 원인이 불명확한 측복부 통증을 호소할 때 고려해야 할 질환이다. 저자들은 청소년기 여아에서 만성적인 좌측측복부 통증으로 진단된 골반울혈증후군 1례를 경험하였기에 보고하는 바이다. Flank Pain is a leading indicator of renal and upper urinary tract disease or trauma, and rarely results from pelvic congestion syndrome. Although pelvic congestion syndrome occurs commonly in multi-parous women, pelvic congestion syndrome should also be considered as the cause of flank pain in an adolescent girl. We report the first case of pelvic congestion syndrome presenting with chronic left flank pain in an adolescent girl.

Encapsulation of CdSe Nanoparticles inside Liposome Suspended in Aqueous Solution

김성진,박혁규,Haeng Sub Wi,양호순,김기범,Kyuyong Lee,Sang Min Kim 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III

We studied the encapsulation of CdSe nanoparticles inside liposomes suspended in aqueous solution. A mixed solution of CdSe nanoparticles and asolectin lipid molecules was dried and hydrated with phosphate buffer saline (PBS). We observed large liposomes with CdSe nanoparticles, which exist in two different states. In one state, nanoparticles exist as micelle state inside the liposome. In the other state, nanoparticles are locally encapsulated in the lipid bilayer of the liposome. To our knowledge, the encapsulation of CdSe nanoparticles in the lipid bilayer of a liposome has never been reported so far.

PDMS 기능성 박막을 이용한 적은 게이트 누설 전류 특성을 가지는 유기트랜지스터의 제작

김성진,Kim, Sung-Jin 한국진공학회 2009 Applied Science and Convergence Technology Vol.18 No.2

Polydimethylsiloxane (PDMS) 기능성 박막을 도입하여 적은 게이트 누설 전류 특성을 가지는 유기트랜지스터를 제작하고 평가하였다. UV/ozone 처리를 하여 PDMS 표면에 위치한 소수성의 메틸 그룹의 화학적 결합을 끊어 친수성 실리콘 산화막 성질로 표면을 변화시키고 선택적인 펜타신 증착을 유도하였다. Off 전압상태 ($V_g-V_t>0$)에서 게이트 전압에 의해 기인하는 누설 전류는 선형영역 ($V_d=-5\;V$)과 포화영역 ($V_d=-30\;V$)에서 ${\sim}10^{-10}$ A의 값을 보여주며 기존의 트랜지스터 보다 개선된 누설 전류 특성을 나타내었다. We present a technique for fabricating low leakage organic field-effect transistors by a functional polydimethylsiloxane (PDMS) layer. The technique relies on the photo-chemical process of conversion of the PDMS to a silicon oxide which provides the selective growth of pentacene thin films. The reduced gate leakage current showed ${\sim}10^{-10}$ A in a linear ($V_d=-5\;V$) and saturation ($V_d=-30\;V$) region at $V_g-V_t>0$.

Comparison of the Structural, Magnetic, Electronic, and Optical Properties for ZnCoO and Co-precipitation Samples

김성진,조용찬,김수재,이승훈,정세영,배종성,정일경,Won-Kyung Kim,조채용,박성균 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.56 No.4

In order to investigate the ferromagnetism of Co-doped ZnO, we systematically fabricated Zn1−xCoxO (x = 0, 0.05, 0.1, 0.2, 0.4) thin films on (0001) Al2O3 substrates by rf-sputtering and measured their structural, electronic, optical, and magnetic properties. Below 20 mol% of Co, the Co ion could be successfully substituted at Zn site and showed clear paramagnetism in superconducting quantum interference devices (SQUID) and magnetic circular dichroism (MCD)measurements. However, secondary phases, including Co metal clustering, were found in the ZnO matrix at a 40-mol% Co concentration, showing a strong ferromagnetism due to the contributes of microscopic precipitates of Co ions. Consequently, the clear paramagnetic behaviors of all the fabricated ZnCoO thin films in the magneto-optic MCD results revealed that the spin-polarized band structure, an intrinsic property of ferromagnetism diluted ferromagnetic semiconductors (DMSs),could not be induced by the substituted Co ions themselves. Importantly, these results indicate that any intrinsic ferromagnetism in ZnCoO cannot be induced without the contribution of hydrogen.

플라이 애쉬를 이용한 코디어라이트 세라믹 하니컴 필터 제조 및 물성

김성진,방희곤,박상엽,Kim, Sung-Jin,Bang, Hee-Gon,Park, Sang-Yeup 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.6

The fabrication process of the honeycomb filter was investigated using synthesized cordierite with the addition of pore former and extrusion additives (either organic matter or graphite). Also, the effect of additives on the resultant properties of honeycomb filter such as porosity, thermal expansion coefficient and mechanical strength were investigated. With increasing the organic matter up to 10 wt%, porosity was increased but compressive strength was decreased. With increasing the graphite content, however, both porosity and compressive strength were increased. The specimen with an optimum processing condition (C-17A30G, sintering at $1150^{\circ}C$) was demonstrated 59% in porosity, 69 MPa in compressive strength, and $2.4{\times}10^{-6}/^{\circ}C\;(25{\sim}1000^{\circ}C$) in thermal expansion coefficient, which physical properties are appropriate for the honeycomb filter applications.

플라이 애쉬를 이용한 다공성 코디어라이트의 합성 및 특성

김성진,방희곤,박상엽,Kim, Sung-Jin,Bang, Hee-Gon,Park, Sang-Yeup 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.6

Porous cordierite was synthesized by the mechano-chemical processing using fly ash. The phase evolution of cordierite was investigated as a function of processing variables such as milling time and sintering temperature. In this study, the phase transition path of cordierite from fly ash was followed by sapprine/spinel ${\to}$ mullite/spinel ${\to}{\alpha}$-cordierite. Porous cordierite fabricated after 32 h of milling time and sintering at $1150^{\circ}C$ showed relatively low thermal expansion coefficient ($2.5{\times}10^{-6}/^{\circ}C\;(25{\sim}1000^{\circ}C$)) and high porosity (75%).