빅 데이터를 이용한 임플란트에 대한 관심도 분석: 웹 기반 연구

공현준 大韓齒科補綴學會 2021 대한치과보철학회지 Vol.59 No.2

Purpose: The purpose of this study was to analyze the level of interest that common Internet users have in dental implant using a Google Trends, and to compare the level of interest with big data from National Health Insurance Service. Materials and methods: Google Trends provides a relative search volume for search keywords, which is the average data that visualizes the frequency of searches for those keywords over a specific period of time. Implant was selected as the search keyword to evaluate changes in time flows of general Internet users’ interest from 2015 to 2019 with trend line and 6 month moving average. Relative search volume for implant was analyzed with the number of patients who received National Health Insurance coverage for implant. Interest in implant and conventional denture was compared and popular related search keywords were analyzed. Results: Relative search volume for implant has increased gradually and showed a significant positive correlation with the total number of patients (P<.01). Interest in implant was higher than denture for most of the time. Keywords related to implant cost were most frequently observed in all years and related search on implant procedure was increasing. Conclusion: Within the limitations of this study, the public interest in dental implant was gradually increasing and specific areas of interest were changing. Web-based Google Trends data was also compared with traditional data and significant correlation was confirmed. 목적: 본 연구는 구글 트렌드를 이용하여 일반적인 인터넷 사용자들이 치과 임플란트에 대해 가지고 있는 관심도를 분석하고, 관심도의 수준을 국민건강보험공단의 빅 데이터와 비교하기 위함이다. 재료 및 방법: 구글 트렌드는 검색 키워드에 대한 상대적 검색 볼륨을 제공하는데, 이것은 특정 기간 동안의 검색 빈도를 시각화하여 보여주는 평균 데이터이다. 임플란트를 검색어로 선정하여, 2015년에서 2019년까지의 일반적인 인터넷 사용자들의 관심도를 추세선과 6개월 이동평균선을 이용하여 분석하였다. 다음으로, 임플란트에 대한 상대적 검색 볼륨을 국민건강보험의 적용을 받아 임플란트를 식립한 환자 수의 변화와 함께 비교하였다. 임플란트와 전통적인 의치에 대한 상대적 관심도를 비교하였으며, 임플란트와 관련된 주요 연관 검색어를 분석하였다. 결과: 임플란트에 대한 상대적 검색 볼륨은 점진적으로 증가하였으며, 국민건강보험 혜택을 받은 환자 수와 유의한 양의 상관관계를 보였다 (P < .01). 임플란트에 대한 관심도는 모든 기간에 있어서 의치에 비해 높았다. 연관 검색어로는 임플란트 비용이 가장 빈번하게 관찰되었으며, 임플란트 과정에 대한 검색이 증가하였다. 결론: 본 제한된 연구의 결과를 근거로, 임플란트에 대한 대중의 관심은 점진적으로 증가하고 있으며, 관심의 세부 분야는 변하고 있다. 또한 웹 기반의 구글 트렌드 데이터를 전통적인 방식의 데이터와 비교한 결과, 유의한 상관관계를 확인할 수 있었다.

연구논문 - 고분자 : Miniemusion polymerization 과 inverse emulsion polymerization 을 통한 PUD 에멀젼 중합과 안정성

공현준,김주영,서경도 한국공업화학회 1994 한국공업화학회 연구논문 초록집 Vol.1994 No.1

A study on sagittal root position of maxillary anterior teeth in Korean

공현준 대한턱관절교합학회 2020 구강회복응용과학지 Vol.36 No.2

Purpose: The purpose of this study was to analyze the sagittal root position of maxillary anterior teeth and report the frequency of each classification in Korean for immediate implant placement. Materials and Methods: A retrospective review of cone-beam computed tomography (cone-beam CT) images was conducted on 120 patients (60 male and 60 female) who fulfilled the inclusion criteria. After reorientation of the axis, cone-beam CT images were evaluated and the relationship of the sagittal root position (SRP) of the maxillary anterior teeth to its associated osseous housing was recorded. Class I, II, and III were classified respectively when the root was positioned on the labial, central, and palatal aspect of the alveolar bone. Class IV was the position that at least two thirds of the root is engaging both the labial and palatal cortical plates. Then, the angulation of the root axis and the alveolar bone axis was measured. Descriptive statistics and Kruskal-Wallis test were used to compare the angulation according to the root position and SRP class. Results: The frequency distribution of sagittal root position of maxillary anterior teeth indicated that 81.1%, 10.3%, 1.9%, and 6.7% were classified as Class I, II, III, and IV, respectively. The sagittal angulation at approximately 77.5% of central incisor, lateral incisor, and canine was < 20 degrees, but the angle at more than 42.7% of canine was ≥ 20 degrees. Within the class, the angulation was statistically significantly greater in Class I (16.19) compared to Class II (8.72) and Class III (9.93), and smaller in Class IV (3.79). Conclusion: Within the limitation of this study, a majority of the maxillary anterior roots were positioned close to the buccal cortical plate. However, some roots have very thin alveolar bone and sagittal angulation larger than 30 degrees. Therefore, cone-beam CT analyses of the sagittal root position and the sagittal angulation are recommended for the selection of the appropriate dental implant treatment approach. (J Dent Rehabil Appl Sci 2020;36(2):88-94)

Evaluation and Deactivation of Endocrine-Disrupting Chemicals from Plastic Wastes

공현준 한국공업화학회 2021 한국공업화학회 연구논문 초록집 Vol.2021 No.1

The quality and reliability of YouTube videos on All-on-four concept

공현준 대한치과의사협회 2022 대한치과의사협회지 Vol.60 No.10

Purpose. The purpose of this study was to evaluate the quality of popular videos available on YouTube related to the all-on-four implant concept. Materials and Methods. Videos containing information relevant to all-on-four implant were searched on YouTube on July 7, 2020. The videos were listed using the advanced search option ‘sort by view-count’ and the top 60 videos, which met the criteria and with duplications removed, were analyzed. The DISCERN instrument and JAMA benchmarks were used to evaluate selected videos. Statistical analysis was performed to evaluate the DISCERN scores according to the producer groups. Results. Based on DISCERN score, 39 videos were rated as poor and very poor, while only one video rated as good. Videos produced by dentists showed statistically significantly higher DISCERN score than videos produced for commercial use or by unknown. All videos met the criteria for authorship and currency of JAMA benchmark. However, the number of videos with reference and copyright displayed was very small at 16%. Also, the disclosure percentage related to sponsorship and financial support was 53.33%. Conclusion. Within the limitation of this study, YouTube was an inappropriate information source about all-on-four concept. Patients need to be careful not to completely trust dental information that they search on YouTube, and dentists will have to upload relevant and reliable information using evaluation criteria such as DISCERN and JAMA benchmark.

사이코드라마를 통한 성폭력 행위자들의 성경험역사와 아동기외상의 통찰에 관한 현상학 연구

공현준,신동열,Kong, Hyun-jun,Shin, Dong-yeol 산업진흥원 2020 산업진흥연구 Vol.5 No.2

본 연구는 행위자가 성폭력 사건과 연결된 자신의 성적문제를 초기성경험역사를 통해 인지하도록 돕고, 행동과 감정의 표현에 중심을 두는 사이코드라마를 매개체로 성폭력 행위자들의 고착된 감정을 탐색하고 통찰하는 과정을 검증하였다. 연구문제는 행위자들의 성폭력 사건과 인지, 사이코드라마를 통한 실제적인 통찰의 과정으로 나누어서 구성되었으며 행위자들의 사건, 사건과 관련한 과거의 성경험역사와 아동기 외상의 탐색, 사이코드라마를 통한 감정의 통찰과 변화를 다루었다. 연구를 기반으로 도출한 결과는 다음과 같다. 첫째, 성폭력 행위자들의 사건과 관련된 환경에서 낮은 자기이해 수준과 성폭력 사건에 대한 잦은 방어기제 사용을 보였으며, 일상생활의 과정에서 사건에 영향을 주는 문제적 요인을 인지하고 있었지만 심각하게 생각하지 않는 것으로 나타났다. 둘째, 참여자들의 성경험역사와 관련하여 왜곡된 남성성과 성인지가 많이 나타났다. 초기 성행위 경험에서 연인과의 감정적 교류보다는 성적인 대상으로서 보는 경우가 많았으며, 초기 성경험의 내용은 참여자들이 저지른 실제 성폭력 사건과 연결되는 결과를 보였다. 셋째, 사이코드라마를 통한 참여자들의 아동기 외상은 급격히 변화한 가정환경과 아버지에 의한 학대로 연결되었다. 넷째, 사이코드라마의 초기 과정에서 분노로 대변되는 감정의 실제 내용은 슬픔이나 고통, 아쉬움, 떠나는 모친에 대한 그리움은 카타르시스 과정을 통해 감정에 대한 객관적인 통찰로 연결되는 과정을 밝힌 것에 그 의의가 있다. This study has verified the process of helping actors recognize their sexual problems linked to sexual violence cases through early sexual experience history, and exploring and insighting the stuck feelings of sexual violence actors through psychodrama, which focuses on expressing behavior and emotions. The research questions were divided into sexual violence cases and perceptions of actors, actual insights through psychodrama, and dealt with past biblical history related to actors' events and events, exploration of childhood trauma, and insights and changes in emotions through psychodrama. The results from the study are as follows. First, they showed low self-understanding levels and frequent use of defense mechanisms against sexual violence cases in an environment related to cases involving sexual offenders, and were aware of the problematic factors affecting the cases in the course of their daily lives, but did not take them seriously. Second, there were many distorted masculinity and adult sites related to participants' biblical experience history. In the early experience of sexual activity, it was often viewed as a sexual object rather than an emotional exchange with a lover, and the contents of the initial Bible experience were linked to actual sexual violence cases committed by participants. Third, childhood trauma of participants through psychodrama led to rapidly changing family circumstances and abuse by fathers. Fourth, the actual content of emotions represented by anger in the early stages of psychodrama is meaningful in that it revealed the process of sadness, pain, regret and longing for a departing mother leading to objective insight into emotions through the catharsis process.

연구논문 - 고분자 : 개시제의 종류에 따른 Urethane Acrylate Miniemulsion 의 유화중합속도와 안정성에 미치는 영향

공현준,김주영,서경도 한국공업화학회 1994 한국공업화학회 연구논문 초록집 Vol.1990 No.3

Reductive-annealing-induced changes in Mo valence states on the surfaces of MoO3 single crystals and their high temperature transport

공현준,권한솔,김혜경,진광수,이재광,이준혁,허윤석,조진형,진형진 한국물리학회 2019 Current Applied Physics Vol.19 No.12

Reduction of MoO3 in extreme reducing condition is a way to achieve Mo metal. However, effect of less extreme reductive-annealing, where it allows to keep the crystal structure, on physical and chemical properties of MoO3 has not been well-studied. In this work, we studied the evolution of Mo valence state during reductive annealing and its effect on high temperature transport. We found the formation of oxygen vacancies on surface of MoO3 single crystals at the low temperature, which is evidenced by increase of Mo5+ and color change. In addition, formation of Mo4+ was at the elevated temperature. For understanding the relation between bulk conductivity and Mo valence state, real-time impedance spectroscopy is employed. Use of two different gases makes it possible to distinguish impedance responses of MoO3 from those of reduced MoO3-x. Also, from time-dependent impedance measurements, we observed the evolution of transport behaviour by evolution of Mo valence state.

Miniemulsification 을 이용한 polyurethane dimethacrylate 에멀젼 제조와 물성

공현준,김주영,서경도 한국공업화학회 1993 한국공업화학회 연구논문 초록집 Vol.1993 No.0

콘빔형 전산화단층영상을 이용한 한국인의 본윌 삼각에 대한 평가

공현준(Hyun-Jun Kong),오상천(Sang-Chun Oh) 대한턱관절교합학회 2018 구강회복응용과학지 Vol.34 No.2