The prediction of the tooth size in the mixed dentition for Korean

Moon, Sung-Hwan,Kim, Seong-Oh,Yu, Hyung-Seong,Choi, Byung-Jai,Choi, Hyung-Jun,Lee, Jae-Ho 大韓小兒齒科學會 2006 大韓小兒齒科學會誌 Vol.33 No.2

이번 연구의 목적은 혼합치열기 아동에서 미맹출된 견치와 소구치의 크기를 예측하는데 있어서 한국인에 맞는 방정식을 만들기 위함이다. 미맹출 치아의 크기를 예측하는 것은 혼합치열기 교정 진단과 치료계획 수립에 있어서 매우 중요하다. 미맹출된 견치와 소구치 크기를 예측하는 방법은 몇가지가 있지만 그중에서도 가장 흔하게 쓰이는 것이 모이어의 예측표와 다나카와 존스턴의 방정식이 있다. 하지만 그것들은 백인을 위해서 제작된 것이고 치아 크기는 인종에 따라서 다르다고 알려져 있다. 이번 연구에서는 치아크기를 측정하여 하악 영구 절치의 크기 합과 견치 및 소구치의 크기 합 사이의 상관관계를 구하고 회귀방정식을 이용해서 한국인에 맞는 예측표를 만들었다. 연세대학교 치과대학에 재학중인 178명의 한국 학생(남 108명, 여 70명, 평균연령 21.63)을 대상으로 실험하였다. 영구치의 근원심 폭경을 석고모형상에서 calipers를 이용해서 측정하였다. 성별간의 치아 크기는 차이가 있었다(p<0.05). Correlation coefficient는 0.57에서 0.64의 범위였고, standard errors of the estimates 는 여성에서 0.6으로써 남성보다 우수하였다. r^(2)값은 0.27에서 0.41의 범위를 나타내었다. Estimating the size of unerupted teeth is an essential aspect of orthodontic diagnosis and treatment planning in the mixed dentition. Several methods were introduced and used for the prediction. The most common methods among these would be Moyers probability chart and Tanaka and Johnston equations. These are currently used widely, but they were developed for Caucasians. Because there are clear racial differences in teeth size, the objectives of this study were to produce correlation coefficients between the combined mesiodistal widths of the permanent mandibular incisors and those of the canines and premolars for each quadrant, and prediction tables with regression equations, specifically for Korean. 178 young adults (70 women, 108 men, mean age 21.63 years) were selected from the College of Dentistry, Yonsei University, Seoul, Korea. The mesiodistal crown diameters of the permanent teeth were measured with calipers. Significant sexual dimorphism was found in tooth sizes. The correlation coefficients between the total mesiodistal width of the mandibular permanent incisors and those of the maxillary and mandibular canines and premolars were found to be between 0.52 and 0.64. The standard error of the estimatation was better (0.60) for women and the r^(2) values ranged from 0.27 to 0.41 for both sexes, Prediction tables were prepared for Korean. This study showed larger canine and premolar diameters than Tanaka and Johnston's and Moyers' studies which might be due to the racial differences. Further investigations with a larger sample size will be needed for more representative data on the Korean population.

미량원소의 엽면시비가 토마토의 초기 생육에 미치는 영향 : Lycopersicum esculemtum Mill

전하준,최문환,김민 대구대학교 생명과학연구소 2002 생명과학연구 Vol.1 No.2

토마토를 이용하여 미량원소 엽면시비제인 Saponin과 EVA를 각각 1000㎖·ℓ^-1와 3000㎖·ℓ^-1의 농도로 처리하여, 생육초기에 미치는 효과를 조사하였다. 토마토의 초장, 엽수, 경경 그리고 엽면적에 미치는 엽면 시비제의 생육촉진효과의 일정한 경향을 관찰할 수는 없었지만, 생육단계에 따라서 일부 처리에 있어서는 엽면시비에 의한 수치의 증가를 관찰할 수 있었다. 그러나, 각각의 조사항목에 대한 수치의 변화는 서로 연관성이 있을 것으로 생각되며, 이러한 수치의 변화는 미량요소에 의한 효과인지 아니면 성분표시가 되어있지 않은 식물생장조절물질 같은 성분의 효과인지에 대해서는 앞으로도 계속적인 실험을 통하여 확인할 필요가 있을 것으로 생각되었다. 본 실험의 결과에서 생산자의 무분별한 엽면시비제의 사용은 그 효능과 효과에 의문을 제기할 수 있는 가능성이 충분히 있을 수 있으므로, 그 사용에 있어서는 작물에 따라서 성분, 사용량, 사용방법을 충분히 파악하여 사용하는 것이 경제적일 뿐만 아니라 작물생육을 위해서도 유익할 것으로 생각되었다. This study was conducted to investigate the effects of foliar application of microelements on the earlier growth of table variety tomato. There were no significant effects of foliar application on plant height, leaf number, stem diameter, leaf area in tomato, but it seemed that there were some possibility for growth promote effect in leaf number and leaf area by foliar spray of EVA 1000㎖·ℓ^-1 and Saponin 1000㎖·ℓ^-1 treatment at some growth stages. Foliar spray of microelements may have some efficient effects for plant growth or differentiation, they have to confirmed the optimum concentration, treatment times and components with plants.

한국 정상인에서 연령에 따른 뇌혈류분포와 혈류예비능의 변화 : Tc-99m HMPAO SPECT 에 의한 연구

문대혁,이희경,송호천,이재태,범희승,손혜경,정환정,민정준,김지열 대한핵의학회 1999 핵의학 분자영상 Vol.33 No.3

Purpose: The aim of this study was to evaluate the normal values of regional cerebral blood flow (rCBF) and cerebrovascular reserve (CVR) in normal children to aged volunteers using Tc-99m HMPAO. Materials and Methods: Thirty four right-handed normal volunteers (20 males, 14 females, mean age 40.3±24.9 years, range 4 to 82 years) were underwent rest/acetazolamide (ACZ) brain SPECT using Tc-99m HMPAO and the sequential injection and subtraction method. rCBF was estimated on the basis of a semiquantitative approach by means of right/left ratio, region/cerebellum and region to whole brain ratios in frontal, parietal, temporal, and occipital lobes, basal ganglia, thalami, and cerebellum. CVR was measured by means of % perfusion increase calculated as % mean count change compared to rest rCBF in each regions. Results: Mean values of right to left ratios range from 1.004 to 1.018. rCBF was highest in cerebellum and lowest in basal ganglia and thalami. Frontal and temporal rCBF decreased while occipital and thalami rCBF increased according to age. No sexual difference of rCBF was noted. Mean CVR was 29.9±12.9%. Mean CVR significantly increased to late teens, and declined thereafter. After 6th decade, CVR in both frontal lobes, left parietal lobe and right basal ganglia decreased significantly with advancing age. There was no sexual difference of CVR. Conclusion: Quantitative assessment of CVR was possible by ACZ Tc-99m HMPAO brain SPECT. It revealed that rCBF and CVR changed according to age in normal Korean volunteers. There was no sexual difference.

방사선치료 조사영역 내에 발생한 설암 환자에서 입체조형방사선치료 경험 : 증례보고

조문준,장지영,김기환,김병국,송창준,김준상,김재성 충남대학교 암연구소 2003 암연구소 업적집 Vol.3 No.-

Objectives : We report an interim result of conformal radiotherapy in a patient with early stage cancer at the base of the tongue, which developed in a previously irradiated area. Materials and Methods : A 64-year-old male patient was diagnosed with T4NOMO supraglottic cancer. He received 72Gy of radiation therapy from 21 November 1988 to 24 February 1989. He had local failure and underwent a salvage total laryngectomy on 28 August 1989. Subsequently, he did well. In early 1999, he suffered from throat pain. He had a 2.5cm ulcerative mass at the base of his tongue, in the area that had been irradiated previously. Biopsy showed squamous cell carcinoma. After workup, he was diagnosed with base of tongue cancer with T2NOMO. Surgery was not feasible because the morbidity was not acceptable. Since it was difficult to re-irradiate the area with a curable dose using conventional 2D radiation therapy with an acceptable morbidity, we decided to try conformal radiotherapy. We used 7 static beam ports with field sizes from 7×6.4 to 8×8㎠, using 6 and 10MV photons. The fractionation regimen was 1.8Gy, 5 times per week. He received 64.8Gy in 36 fractions from 9 April 1999 to 1 June 1999. Results : In the 21 months since radiotherapy, the patient has not experienced any acute or chronic complications, such as xerostomia. He experienced relief of pain shortly after the start of radiotherapy, showed a complete response, and is still doing well. Conclusion : Conformal radiotherapy can be used to treat cancer that develops within a previously irradiated field, with curative intent.

粉末法을 爲한 多重度 因子

徐日煥,秋錦洪,李珍昊,林星秀,柳保盈,朴晶蘭,金憲俊,成百石,李正秀,金文執 충남대학교 자연과학연구소 1993 忠南科學硏究誌 Vol.20 No.1

The multiplicity factor, which may be defined as the number of different planes in a form having identical interplanar spacing and identical intensity, is tabulated here for eleven Laue groups on the basis of their symmetries.

방사선치료 조사영역 내에 발생한 설암 환자에서 입체조형방사선치료 경험 : 증례보고

조문준,장지영,김기환,김병국,송창준,김준상,김재성 충남대학교 암공동연구소 2003 암공동연구소 업적집 Vol.3 No.

Objectives : We report an interim result of conformal radiotherapy in a patient with early stage cancer at the base of the tongue, which developed in a previously irradiated area. Materials and Methods : A 64-year-old male patient was diagnosed with T4NOMO supraglottic cancer. He received 72Gy of radiation therapy from 21 November 1988 to 24 February 1989. He had local failure and underwent a salvage total laryngectomy on 28 August 1989. Subsequently, he did well. In early 1999, he suffered from throat pain. He had a 2.5cm ulcerative mass at the base of his tongue, in the area that had been irradiated previously. Biopsy showed squamous cell carcinoma. After workup, he was diagnosed with base of tongue cancer with T2NOMO. Surgery was not feasible because the morbidity was not acceptable. Since it was difficult to re-irradiate the area with a curable dose using conventional 2D radiation therapy with an acceptable morbidity, we decided to try conformal radiotherapy. We used 7 static beam ports with field sizes from 7×6.4 to 8×8㎠, using 6 and 10MV photons. The fractionation regimen was 1.8Gy, 5 times per week. He received 64.8Gy in 36 fractions from 9 April 1999 to 1 June 1999. Results : In the 21 months since radiotherapy, the patient has not experienced any acute or chronic complications, such as xerostomia. He experienced relief of pain shortly after the start of radiotherapy, showed a complete response, and is still doing well. Conclusion : Conformal radiotherapy can be used to treat cancer that develops within a previously irradiated field, with curative intent.

진행암 환자에서 Cisplatin 병용화학요법 시 Ondansetron의 오심 구토 조절 효과

조문준,윤환중,전의건,길준영,조덕연,김삼용 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.2

Ondansetron is a novel agent that selectively binds to the 5-hydroxytryptamine_3 receptor, and has been reported to have a prominent effect in the prevention of anti-neoplastic agent induced nausea and vomiting. Twenty solid tumor patients who were scheduled to receive cisplatin containing combination chemotherapy participated in a prospectively open-labeled study to evaluate the antiernetic efficacy and safety of ondansetron. The male to female ratio was 11 : 9 and median age was 49(16-70). The sites of primary neoplasms and number of patients were as following : head and neck 4, metastatic carcinoma of unknown primary site 3, stomach 3, osteosarcoma 2, ovary 2, esophagus 1, melanoma 1, penile 1, bladder 1, cervix 1, and extragonadal germ cell 1. Ondansetron was given as an 8mg loading dose IV before chemotherapy followed by 8mg IV every 8 hours until 24 hours after chemotherapy completion. Complete or major control(0 to 2 emetic episodes) of emesis was achieved in 17 of 20 patients(85%;complete 50%, major 35%) receiving ondansetron during the first 24hrs of chemotherapy. During the period of day 2 through clay 5 of chemotherapy, 14 of 20(75%) patients had complete or major control of emesis(complete 35%, major 35%). No severe side reactions were recorded in ondansetron treated patients, while mild to moderate headache was noted in 20% of patients. These results show that ondansetron is effective in the control of cisplatin induced nausea and emesis, and can be administered safely with minimal side effects.

마이크로 어셈블리용 6자유도 정렬기의 기구학적 분석 및 디자인

유용환,이문구,이수훈,홍민성,송준엽,이창우 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-

This work will develop a 6-DOF precision aligner with small size and high resolution for assembling the micro parts for a mobile electronics. Here, Tiny PicomotorTM actuator that is small and reliable will be applied to this aligner system. The principle of this actuator is PZT that turns a precision thread and then the screw moves linearly. Arrangement of actuators will be a symmetrical based on kinematic design. This paper presents combining two modules of mechanism for the 6-DOF precision aligner. The first is a stage which can control XYθz motion, and the second can control Z motion, in other words, Z tilt motion. According to its specifications, it is expected to satisfy requirement of precision.

Reciprocal Lattice Explorer의 原理와 使用法

徐日煥,李珍昊,秋錦洪,林星秀,柳保盈,朴晶蘭,金文執,趙素羅,金憲俊,李正秀,成百石 충남대학교 자연과학연구소 1993 忠南科學硏究誌 Vol.20 No.2

Reciprocal lattice explorer는 de Jong-Bouman camera와 Buerger precession camera를 合친것이다. 이 explorer를 使用하면 goniometer에 한번 固定한 試料를 使用하여 그 試料의 空間群을 決定하는데 必要한 모든 寫眞을 撮影할 수 있으며 그들은 찌그러지지 않은 逆格子面의 寫眞들이다. 本 論文에서는 de Jong-Bouman 과 Buerger precession 寫眞術의 原理와 使用法을 記述 하였고 또한 de Jong-Bouman의 振動寫眞과 zeroth layer 寫眞으로부터 11個 Laue群의 識別方法도 提示하였다. The reciprocal lattice explorer is an instrument which incorporates the principles of both the Buerger precession and the de Jong-Bouman methods. On the explorer all photographs which are necessary for a space group determination can be taken with a single setting of a crystal and the photographs show undistorted pictures of the reciprocal lattice planes. In this paper, the principles and the usages of the de Jong-Bouman and the Buerger precession photography are described, and a method of 11 Laue group identification using the de Jong-Bouman oscillation and zeroth layer photographs is shown.

척추관 협찬증 환자 진료 프로세스 개발

이환모,김호중,김긍년,안풍기,천자혜,김양수,신혜선,김인숙,정혜경,김영아,채형기,박인영 한국의료QA학회 2009 한국의료질향상학회지 Vol.15 No.2

연구배경: 수술적 치료가 필요한 척추관협착증 환자들은 주로 60세 이상의 고령환자로장기간의 입원 시 기회 감염의 증대와 불필요한 의료비의 증대를 가져오게 되며, 수술후환χ}들의 재원일수의 증가는병원의 병상가 동률을감소시키고, 전공의에게는불필요한 업무를 증가시킨다. 연구목적: 비용·효과면에서 최적화된 진료지침의 개발은 불필요한 의료비의 감소및 Hospital Induced Complication을 줄여 환자만족도를증진시킬 수 있으며, 각 환자에 대한전공의 업무를 줄일 수있다. 의료기관: 서울특별시에 소재한 2,075병상의 종합전문 요양기관 연구방법: 정형외과및 신경외과의 척추관협착증환자 의 처방을 비교하여 최적의 표준진료지침을 개발하고 최종적으로 CP Master Program (EMR 프로그램)에 입력하여 환자에게 적용하였다. 연구결과': CP 적용전, 후비교를통해 재원일수는 3.8일 이 감소하였으며, 이에 따라 병상가동률 및 진료수익이 증가했으리라고 예상되며 현재 비교검토중이다. 또한,CP 개발및 CP Master Program의 사용을 통한 전공의 업무감소에 대해 검토하고 있다.