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총체적 심미 악안면 성형수술 : I. 상하악 악교정 수술을 위한 새로운 연조직 심미기준선
정필훈,송민석,Choung, Pill-Hoon,Song, Min-Seok 대한악안면성형재건외과학회 1993 Maxillofacial Plastic Reconstructive Surgery Vol.15 No.4
Improvement of orthognathic surgical techniques make it possible to design esthetic surgical correction for total esthetic face. In order to find the esthetic line which guide esthetic surgical correction in patients of orthognathic surgery, cephalometric soft tissue analysis of esthetic faces were performed. In esthetic Korean young adults, 25 males and 25 females who were within 1 S.D. of E-line, ANB, P/A facial height ratio, were analyzed in natural position keeping their face eye level. 1. Sn position is constant in males and females. The Sn-N'-N' Vertical plane angle is $5.3^{\circ}$ in both sexes. Sn is positioned in front of 5 mm in female 7 mm in male from the N' vertical plane. 2. The Sn-Ls line make constant angle to horizontal plane with $72.5^{\circ}$ in both sexes, which is called "upper esthetic line". The Ls-Pg' line makes constant angle to $72.4^{\circ}$ (range $72.2^{\circ}$ in female to $72.6^{\circ}$ in male), which is called "lower esthetic line". 3. When inter-esthetic line angle (the Sn-Ls line to Ls-Pg' line) has $144.9^{\circ}$, lower third face has esthetic upper and lower lip. 4. In treatment planning, Sn is first corrected in proper position, and then upper and lower esthetic line are established with the angle of 144.9. The maxilla is moved to tangent Ls to the upper esthetic line, and mandible is moved to tangent Li and Pg' to the lower esthetic line, according to the "y"-shaped esthetic lines, then lower third face showes esthetics.
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Anatomic Study on the Lacrimal Duct using Computerized Tomograph
정필훈,이의룡,홍종락,Choung Pill-Hoon,Lee Ui-Lyong,Hong Jong-Rak Korean Cleft Lip and Plate Association 2002 대한구순구개열학회지 Vol.5 No.2
구순 구개열 환자의 악교정 성형수술로 구강내 Le Fort II 골절단술이나 비중격 성형술이 많이 이용되는데, 이때 비골의 외측골절단술을 요하며, 이에 대한 술 후 합병증으로 비루관의 폐쇄나 비골의 분쇄골절 등이 발생할 수 있어, 악안면기형 환자를 다루는 구강악안면외과의사에게 비루관의 웅용해부학적 연구는 중요하다. 본 연구의 목적은 교합면을 기준으로 촬영된 컴퓨터 단충 촬영에서 비루관의 위치와 크기를 조사하는데 있다. 2000년 7월부터 2003년 2월까지 서울대학교병원 구강악안면방사선과에서 컴퓨터 단층촬영을 시행한 환자 62명을 대상으로 비상악봉합선에서 비루관까지의 최단거리와 비루관의 최대반경과 최소반경을 측정하였다. 우측비상악 봉합선에서 비루관까지의 거리는 5.68mm이고, 좌측은 5.67mm였다. 좌우 및 성별간의 차이는 없었다. 이의 해부학적 지견은 악기형 수술시의 비루관 폐쇄라는 합병증의 예방책으로 기여하리라 생각된다.
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구순 구개열 환자에서의 새로운 구강내 접근 Le Fort II 골절단술
정필훈,김광호,Choung Pill-Hoon,Kim Kwang-Ho 대한구순구개열학회 2001 대한구순구개열학회지 Vol.4 No.2
Midfacial retrusion is one of characteristics of cleft patients due to underdevelopment of the midface. In this case, Le Fort II advancement is indicated. But there has not been reported on intraoral approach to Le Fort II osteotomy for correction of midface, which traditional technique resulted in facial scar. To overcome the problems, Le Fort II osteotomy via only intraoral approach named 'Intraoral Le Fort IT osteotomy' was developed by Choung in 1994, this technique was applied to cleft patients. A new technique of Intraoral Le Fort IT osteotomy for correction of midface in cleft patients was successfully carried out with good results. This technique showed no noticeable relapse nor complications, which is reported.
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Monte Carlo N-Particle Extended Code를 이용한 연 X선 정전기제거장치의 최적제작에 관한 연구(Ⅱ)
정필훈,이동훈 한국안전학회 2017 한국안전학회지 Vol.32 No.6
In order to solve this sort of electrostatic failure in Display and Semiconductor process, Soft X-ray ionizer is mainly used. Soft X-ray Ionizer does not only generate electrical noise and minute particle but also is efficient to remove electrostatic as it has a wide range of ionization. There exist variable factors such as type of tungsten thickness deposited on target, Anode voltage etc., and it takes a lot of time and financial resource to find optimal performance by manufacturing with actual X-ray tube source. Here, MCNPX (Monte Carlo N-Particle Extended) is used for simulation to solve this kind of problem, and optimum efficiency of X-ray generation is anticipated. In this study, X-ray generation efficiency was compared according to target material thickness using MCNPX and actual X-ray tube source under the conditions that tube voltage is 5 keV, 10 keV, 15 keV and the target Material is Tungsten(W). At the result, In Tube voltage 5 keV and distance 100 mm, optimal target thickness is 0.05 ㎛ and fastest decay time appears + decay time 0.28 sec. − deacy time 0.30 sec. In Tube voltage 10keV and distance 100 mm, optimal target Thickness is 0.16 ㎛ and fastest decay time appears + decay time 0.13 sec. − deacy time 0.12 sec. In the tube voltage 15 keV and distance 100 mm, optimal target Thickness is 0.28 ㎛ and fastest decay time appears + decay time 0.04 sec. − deacy time 0.05 sec.
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난발치 및 안면골 골절 정복술후 동통에 대한 Pranoprofen의 치료 효과
정필훈,채윤필 충남대학교 의과대학 지역사회의학연구소 1987 충남의대잡지 Vol.14 No.2
The authors investigated and evaluated the effects and untoward effect of recently developed non-steroidal anti-inflammatory analgesics "Pranoprofen" in field of oral and maxillofacial surgery. The 19 Cases of examined 30 patients were surgical extractions and the rests of examined 30 patients were facial bone fractures. The results were as follows. 1. Effective analgesic action was obtained in 28 patients (93.3%). 2 The gastrointestinal trouble was occurred in 4 patients (13.3%) but the symptome was not severe and disappeared soon after discontinuation of the drug. 3. So, this drug can be used effectively and safely in minor surgery of oral and maxillofacial area.
ScienceON
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