교정용 미니임플랜트의 이중 피치와 직경의 차이가 삽입 및 제거 토크에 미치는 영향 평가

김종완,조일식,이신재,김태우,장영일 대한치과교정학회 2006 대한치과교정학회지 Vol.36 No.4

작은 크기의 교정용 미니임플랜트는 교정적 고정원으로 널리 이용되고 있다. 그러나 빈번히 탈락하는 단점이 있어 이를 개선하기 위해 안정성을 향상시키기 위한 다양한 연구가 시도되어 왔다. 이 연구의 목적은 이중 피치와 직경에 관련하여 미니임플랜트의 안정성에 대한 기계적 성질을 비교 분석하는 것이다. 미니임플랜트의 길이는 8 mm였으며, 피치는 단일 피치형과 이중 피치형, 직경은 1.4 mm와 1.6 mm로 단일 피치형 1.4 mm, 단일 피치형 1.6 mm, 이중 피치형 1.4 mm, 이중 피치형 1.6 mm 등 총 4군으로 구성되었다. 각 군은 20개의 미니임플랜트로 구성되었고, 균일한 밀도의 polyurethane foam에 삽입 후 제거하였다. 시간에 따른 삽입 및 제거 토크의 변화와 각각의 최대 토크 등을 측정하여 기계적 성질을 비교 분석하였다. 이중 피치형은 단일 피치형보다 유의성 있게 더 낮은 최대 삽입 토크와 더 큰 최대 제거 토크를 보여주었다. 직경 1.6 mm는 1.4 mm보다 유의성 있게 더 큰 최대 삽입 토크와 최대 제거 토크를 보여주었다. 이중 피치형 1.4 mm군은 삽입 시에는 유의성 있게 가장 낮은 최대 삽입 토크를 보여주었으며 제거 시에는 단일 피치형 1.6 mm군보다 높거나 비슷한 최대 제거 토크를 보여주었다. 특히, 이중 피치형군은 최대 제거 토크 후 지속적으로 높은 제거 토크를 보여주었다. 미니임플랜트의 기계적 안정성은 이중 피치에 의해 향상될 수 있으며, 상부의 미세 나사산은 작은 직경에서도 풀림 토크에 저항하는 기계적 안정성을 향상시킬 수 있을 것으로 보인다 Objective: Small orthodontic mini-implants are useful as anchorage. However they have some weaknesses such as loosening. This study was carried out to analyze the mechanical effects of the dual pitch and diameter on the insertion and removal torque of mini-implants. Methods: The threads of mini-implants were mono and dual pitch. The diameters of mini-implants were 1.4 mm and 1.6 mm. Four groups were tested (mono 1.4 mm, mono 1.6 mm, dual 1.4 mm and dual 1.6 mm). All were inserted and removed on polyurethane foam with the torques being measured. Results: The maximum torque of the dual pitch groups was higher than the mono pitch groups during removal but lower during insertion. The maximum torque of the 1.6 mm diameter groups was higher than the 1.4 mm diameter groups during insertion and removal. The dual pitch 1.4 mm group showed the lowest insertion torque but had similar or superior levels of removal torque to that of the mono pitch 1.6 mm group. Conclusions: The dual pitch especially showed a continuous high removal torque after the peak. Despite the small diameter, the dual pitch might improve the initial mechanical stability.

「敎會新報」를 통해 본 同治年間(1862~1874)의 改新敎

金鍾完 又石大學校 1983 論文集 Vol.5 No.-

This thesis is intended to examine some problems of the Protestant mission in the period from 1862 to 1874 through the Chiao-hui hsin-pao 敎會新報 (The News of Churches). This news paper was founded by American missionary Young John Allen is Shanghai 上海 in 1868. It introduced various problems of Christianity, domestic and foreign news and western civilization to Chinese people. So it proffers us useful research materials of the missionary enterprise, various anti-Christian movement and foreign relation of China. In the first half of the nineteenth century, when the Protestant mission began to be introduced into China, its influence was meager. However, after the 1860 when the Sino-French Treaty of Tientsin guaranteed the freedom to preach and practise Christianity anywhere in the empire, its power largely increase, though its missionary work was localized mainly in open ports and was less active as compared with the Catholic Church. At that time in China there were the presbyterian, Baptist, Methodist. London Church etc. There sects established nation-wide parish organization and their individual effort to expand their own sect contributed largely to extension of the Protestant Mission as a whole. Though somewhat critical in regard to the Rites Controversy, they assumed a concilitory attitude toward the tradional Chinese Confucianism and its social system. Neverthless, Anti-Christian movement accured frequently, and as a result many church buildings were demolished and the missionaries and foreigners were killed. The gentry class led these movements and local official were indifferent to or tacitly approved them. Thus Western powers wished to solve these problems by diplomatic means. However, when they dispatched special envoy and concluded treaties in which they demanded the punishment of criminals and the reparations, they have resorted to the gunboat policy.

시민의 간판의 분위기에 운치가 없어 : 원색이 지나친 사용은 눈에 해롭다(1970 년 5 권 3 호)

김종완 대한지방행정공제회 1970 도시문제 Vol.5 No.3

매스.컴이 지역사회개발에 미친 사회적 기능

김종완 중앙대학교 정경대학 신문방송학회 1971 신문방송연구 Vol.1 No.-

마이코프라즈마 樣微生物(MLO, Mycoplasma Like Organism)에 依한 植物의 疾病

김종완 대구대학교 부설 농업과학연구소 1988 농업기술정보지 - 大邱大學校附設 農業科學硏究所 Vol.2 No.-

재난방송에서의 행위지시표현의 사용실태 -폭우특별경보(大雨特別警報)의 기상청회견 담화의 분석-

김종완 중앙대학교 일본연구소 2025 일본연구 Vol.- No.62

In this study, transcripts from a press conference of the Japan Meteorological Administration announcing a special heavy rainfall warning were used to examine the characteristics of directive expressions that alert and warn residents in an area and instruct them to evacuate and take preventive action. The findings indicate that action-directive expressions using passive terms such as “I hope you avoid it early as usual” and “I hope you avoid it quickly,” which are not used in action-directive expressions that appear in the NHK’s special broadcasts during earthquakes and tsunamis, as specified in previous studies and other evacuation instructions used in the disaster prevention manuals of both the central and local governments, wherein passive expressions, such as “I hope you avoid it soon” and “I hope you avoid it soon” are used. The underlying reason for using these action-directive expressions, such as “お願いします” and other passive expressions, is that by omitting specific actions, you can direct activities indirectly, politely, or concisely while still retaining the strong directiveness of “してください”.

참깨 斑點細菌病 病原細菌 Pseudomonas sesami에 관한 硏究

김종완,김진곤 대구대학교 기초과학연구소 1986 基礎科學硏究 Vol.3 No.-

Incidences of bacterial leaf spot in plant of sesame (sesamum indicum L.) were widely observed at sesame production fields in Gyeongsan area of Gyeongbug province in 1983. To investigate the morphological and physiological characteristics of the causal bacterium, some isolates were obtained from the diseased plants of sesame. On the basis of the bacteriological and biochemical tests of the isolates, the causal bacterium was identified to be Pseudomonas sesami. From the results of present study, the bacterium is considered to be classified into a independent species, Pseudomonas sesami, which is listed in Addendum I of Berger's manual 8th edition.

兩晉·南朝時代의 寧州와 大姓 찬씨

김종완 우석대학교 인문사회과학연구소 1998 인문사회과학논총 Vol.1 No.1

[살며 믿으며] 48일의 지하생활

김종완 새가정사 1995 새가정 Vol.- No.-

사용자 선호도를 반영한 유사도 기반 Skyline Query 기법

김종완 적정기술학회 2025 적정기술학회지(Journal of Appropriate Technology) Vol.11 No.1

This study proposes a similarity-based skyline query method capable of quantitatively reflecting user preferences in multi-attribute recommendation environments. Traditional skyline approaches do not consider the relative importance of user preferences across attributes, and their computational cost increases exponentially as the number of dimensions grows, leading to performance degradation in filtering. To address these limitations, the proposed method applies Min- Max normalization to user-preferred attributes—such as distance, rating, and grade—and calculates the Euclidean distance between these attributes and the user preference vector to obtain a single similarity score. This similarity score is then combined with price, an independent attribute, to form a two-dimensional attribute vector (price, similarity). Based on this vector, the skyline query is executed to select alternative objects that align with user preferences. Experimental results demonstrate that the proposed method reduces the number of recommended objects by approximately 80–90% compared to the traditional approach, while also reducing the total number of operations to less than half, thereby simplifying the comparison structure and lowering computational cost. By integrating user-centric preference modeling with a dimension-reduction-based comparison framework, this study presents a filtering mechanism that is highly applicable to recommendation systems and real-time decision support environments. As a result, it can serve as a competitive solution in user-personalized recommendation scenarios where both precision and real-time processing efficiency are required.