A method for mandibular dental arch superimposition using 3D cone beam CT and orthodontic 3D digital model

박태준,이상현,이기수 대한치과교정학회 2012 대한치과교정학회지 Vol.42 No.4

Objective: The purpose of this study was to develop superimposition method on the lower arch using 3-dimensional (3D) cone beam computed tomography (CBCT) images and orthodontic 3D digital modeling. Methods: Integrated 3D CBCT images were acquired by substituting the dental portion of 3D CBCT images with precise dental images of an orthodontic 3D digital model. Images were acquired before and after treatment. For the superimposition, 2 superimposition methods were designed. Surface superimposition was based on the basal bone structure of the mandible by surface-to-surface matching (best-fit method). Plane superimposition was based on anatomical structures (mental and lingual foramen). For the evaluation, 10 landmarks including teeth and anatomic structures were assigned, and 30 times of superimpositions and measurements were performed to determine the more reproducible and reliable method. Results: All landmarks demonstrated that the surface superimposition method produced relatively more consistent coordinate values. The mean distances of measured landmarks values from the means were statistically significantly lower with the surface superimpositions method. Conclusions: Between the 2 superimposition methods designed for the evaluation of 3D changes in the lower arch, surface superimposition was the simpler, more reproducible, reliable method.

나눔으로 상생하는 지능형로봇 혁신공유대학(SHARE) 사업

박태준 한국공학교육학회 2021 Ingenium(人材니움) Vol.28 No.2

우리나라 직업교육의 진로

박태준,김승보 한반도선진화재단 2015 한반도선진화재단 기타 단행본 Vol.- No.-

Identification of a Copy Number Variation on Chromosome 20q13.12 Associated with Osteoporotic Fractures in the Korean Population

박태준,황미영,문상훈,황주연,고민진,김봉조 한국유전체학회 2016 Genomics & informatics Vol.14 No.4

Osteoporotic fractures (OFs) are critical hard outcomes of osteoporosis and are characterized by decreased bone strength induced by low bone density and microarchitectural deterioration in bone tissue. Most OFs cause acute pain, hospitalization, immobilization, and slow recovery in patients and are associated with increased mortality. A variety of genetic studies have suggested associations of genetic variants with the risk of OF. Genome-wide association studies have reported various single-nucleotide polymorphisms and copy number variations (CNVs) in European and Asian populations. To identify CNV regions associated with OF risk, we conducted a genome-wide CNV study in a Korean population. We performed logistic regression analyses in 1,537 Korean subjects (299 OF cases and 1,238 healthy controls) and identified a total of 8 CNV regions significantly associated with OF (p < 0.05). Then, one CNV region located on chromosome 20q13.12 was selected for experimental validation. The selected CNV region was experimentally validated by quantitative polymerase chain reaction. The CNV region of chromosome 20q13.12 is positioned upstream of a family of long non-coding RNAs, LINC01260. Our findings could provide new information on the genetic factors associated with the risk of OF.

한국 자격제도에 대한 상황적 분석

박태준 한국직업교육학회 2002 職業 敎育 硏究 Vol.21 No.2

The purpose of this study was to analyze the Qualification System in Korea by the method 'contextual analysis' and to explain the Qualification System with relating it to the social and cultural institutions.The opposition between the social security system and the family security system can be one level lying on the basis of the Qualification System, and the middle level can be supposed to lie, performing the mediating role such as the confliction between education-centralism and industry-centralism, the conflict and the agreement between labor and management, the confliction between the guarantee of the right of the individual and the improvement of the productivity, the opposition between learning and the job experience, and the opposition between upward decision and downward control. The question how the three levels have relation with each other in the complex structure with three levels, can be the frame of the question for the analysis and explanation in the process of this study.As the result the Qualification System in Korea can be characterized as following. The Qualification System has not various professional vocation degree system and is centering on education on industry, led by the expert group, not including an academic degree, created and controled by the leading of the government.

2P-648 In situ quantitative analysis of Polymorph control of the high energy material in crystallization process using Raman spectroscopy

박태준,임채호,김광주 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.0

간 이식 예정 환자의 구강건강상태 및 치과치료 요구도에 관한 연구

박태준,고홍섭,Park, Tae-Jun,Kho, Hong-Seop 대한안면통증구강내과학회 2009 Journal of Oral Medicine and Pain Vol.34 No.1

Liver transplantation is definitive treatment for the patients suffering from hepatitis, severe liver cirrhosis and liver cancer. In these patients, systemic infections under immunosuppression may occur easily. Therefore, primary object of dental treatments before liver transplantation is absolute removal of oral infection source. In addition, comprehensive dental management plan is essential for success of liver transplantation. The present study has been performed to investigate decayed, missing and filled permanent teeth index(DMFT index), degree of oral hygiene, past medical history, need of dental treatment, completion of dental treatment need and time interval between dental visit and operation date of liver transplantation in liver transplant candidates. Obtained results were as follows; 1. Decayed teeth of the patients were 2.68, missing teeth were 4.02 and filled teeth were 3.42. DMFT index was 10.12. 2. Twenty percents of patients showed moderate to severe food impactions, 42.2% of patients had moderate to heavy calculus and 37.8% of patients displayed gingival inflammation with swelling. 3. Patients needed periodontal treatments more than any other dental treatments. Periodontal treatments were needed for 88.9% of patients, operative & endodontic treatments were 46.7% of patients and 33.3% of patients needed for oral & maxillofacial surgical treatments. 4. Among 90 patients, time interval between scheduled operation date of liver transplantation and dental visit was within 2 weeks for 32.2% of patients, within 1 week for 20.0% of patients. In conclusion, most liver transplant candidates needed dental treatments for removal of potential infection sources. However because of insufficient interval between dental visit and operation date, they had taken liver transplantation procedures without comprehensive dental management. Development of preventive and comprehensive dental management program is mandatory for these patients. Cooperative interdisciplinary management will play a positive role for successful liver transplantation.

우리나라 직업교육의 진로

박태준,김승보 한반도선진화재단 2016 선진화 정책시리즈 Vol.- No.-

기업의 정기 및 비정기 공시 전후 거래량 반응에 관한 연구

박태준 한국경영컨설팅학회 2017 경영컨설팅연구 Vol.17 No.1

본 연구는 한국거래소 유가증권시장 및 코스닥시장에 상장된 기업을 대상으로 정기공시인 영업실적공시를 애널리스트 영업실적 예측오차(Analysts' Earnings Forecast Errors)를 이용하여 긍정적인 어닝서프라이즈와 부정적인 어닝서프라이즈로, 비정기공시인 애널리스트 투자의견 변경을 상향조정과 하향조정으로 각각 구분하여 공시 전후의 거래량 변동을 분석하였다. 본 연구에서는 정기공시 이전에는 투자자의 거래를 조절할 수 있는 재량으로 인해 거래량이 감소하고 비정기공시 이전에는 정보거래자가 시도한 거래를 대부분 수용하는 관계로 거래량이 증가한다고 가설을 설정하고 실증분석하였다. 본 연구의 구체적인 결과는 다음과 같다. 첫째, 정기공시인 영업실적공시 이전에는 초과거래량이 감소하다가 공시 이후에는 증가한다. 이는 정기공시 이전에 무정보거래자의 정보비대칭에 따른 역선택 비용의 회피로 거래량이 감소하고, 공시 이후에는 역선택 문제가 해소되어 증가한다는 결과로서, 투자자간의 정보비대칭 차이로 인해 초과거래량이 감소한다는 Chae(2005)의 연구결과와 일치한다. 둘째, 초과거래량 감소는 긍정적인 어닝서프라이즈 보다는 부정적인 어닝서프라이즈 공시 이전에 나타났다. 이는 긍정적인 어닝서프라이즈 보다는 부정적인 어닝서프라이즈 공시에서 정보비대칭이 한층 심하다는 것을 의미한다. 표본과 분석기간은 다르지만 정기공시 이전에 초과거래량이 감소한다는 Chae(2005)의 결과는 부정적인 어닝서프라이즈 이전의 정보비대칭에 기인하는 것으로 판단된다. 셋째, 비정기공시인 투자의견 변경 정보는 투자의견 상향조정이나 하향조정에 관계없이 공시 이전이나 이후 모두 초과거래량이 증가하는 것으로 나타났다. 이는 정보 공개시점을 사전에 파악할 수 없는 무정보거래자가 공시 이전에 정보거래자가 시도한 거래를 대부분 수용하였기 때문이며, 공시 이후에는 해당 정보에 대한 반응으로 거래량이 증가하는 것으로 보인다. 본 연구는 기업의 정기공시 및 비정기공시 전후 정보비대칭의 차이로 인해 거래량이 차별적으로 변화하고 있는지를 실증적으로 비교분석하였다는데 의의가 있다. This study analyzes excess trading volume around scheduled and unscheduled announcements using KOSPI and KOSDAQ market. In this study, we hypothesize that trading volume decreases due to the investor's discretion to can control their transactions before the scheduled announcements and increases the trading volume as the uninformed investors accept most of the trading offer by informed traders prior to the unscheduled announcements. We employ earnings announcements as scheduled corporate events, while uses analyst recommendation changes as unscheduled corporate events. The results of this study are as follows. First, excess trading volume decreases before earnings announcements, but it increases after the announcements. This is consistent with the study by Chae (2005), in which the excess trading volume decreases due to the information asymmetry among investors before scheduled announcements. Second, excess trading volume declines before negative earnings surprise announcements rather than positive earnings surprises. This means that the information asymmetry is higher at negative earnings surprises than at positive earnings surprises. This suggests that Chae’s (2005) finding might be derived from excess trading volume decreases before negative earnings surprises. Third, excess trading volume increases before or after analyst recommendation changes regardless of whether the analyst recommendation is upgraded or downgraded. The result indicates that trading volume increases due to many transactions between informed traders and the uninformed traders before the recommendation changes and increases in response to the new information after the changes.

The Blood Blister Like-aneurysm: Usefulness of Sundt Clip

박태준,조재훈,김기홍 대한뇌혈관외과학회 2017 Journal of Cerebrovascular and Endovascular Neuros Vol.19 No.3

Objective:Blood blister-like aneurysm (BBA) is a kind of dorsal wall aneurysm and it is small, sessile, fragile and hazardous because of its high mortality and morbidity. Many challenges tried to establish the management or strategy. But so far, there is no optimal treatment of choice for the BBA. In this article, 17 cases of the ruptured BBA in one institute were analyzed retrospectively. The operative options were correlated with surgical and clinical outcomes. Material and Methods:During 14 years between October, 2002 and October, 2016, 23 patients were treated for subarachnoid hemorrhage with ruptured dorsal wall aneurysms. There were various strategies for treatment and different outcomes revealed. BBA were 17 (74%) cases and 6 (26%) cases were saccular aneurysm. By excluding saccular aneurysm, BBA was sorted and classified with its morphological characteristics, and the outcome of treatment in each case investigated retrospectively. Results:Among 17 BBA-cases, 8 cases get microsurgical operation by Sundt clip. 5 cases get operation by conventional Yasargil clip, 1 case treated by Yasargil clip with wrapping, and 2 cases underwent endovascular management with coiling, and 1 case was managed by endovascular trapping of involved internal cerebral artery. Clinical outcomes were analyzed with modified Rankin Scale, Glasgow outcome scale and post-operative complications. Conclusion:As the optimal management, operation using Sundt clip had much significance in treatment BBA. And, a thorough analysis of the angiography is essential to prepare for the treatment of BBA.