• Maxillofacial Plastic and Reconstructive Surgery
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• 제11권1호
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• pp.12-20
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• 1989

This is a retrospective study on 452 patients with maxillofacial bone fracture. The patients were treated at the Dept. of Oral and Maxillofacial Surgery, WON KWANG UNIV. HOSPITAL from Aug. 1, 1984 to Sept. 30, 1988. The results were as follows. 1. The facial bone fractures occured most frequently in the twenties (35.3%)and male were predominant(75%) than female. 2. The most frequent etiologic factor was traffic accident. 3. The most common location of facial bone fracture was mandible(57%). Zygomatic bone & arch(39.9%) were most common on middle 1/3 of the face and symphysis(37.1%) were most common on the mandible. 4. The time from injury to treatment was variable from under the 1 week (65%) to over the 1 week(35%). In most case of the patients were treated beyond the 3 days(51.5%). 5. The relationship of intermaxillary fixation period and treatment method was an intimate relationship. The IMF period was reduced by the use of plate and screw osteosynthesis. 6. The weight loss was proportioned to intermaxillary fixation period.

• 대한두개안면성형외과학회지
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• 제10권1호
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• pp.19-22
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• 2009

Purpose: There are various approaches for open reduction surgery for orbitozygomatic fractures. After the incisions are performed, patients might have various complications. In this point of view, we conducted a retrospective study of the usability of infraorbital incision on elderly patients, generally more vulnerable to scleral show and ectropion. Methods: In this study, 20 patients who are relatively more vulnerable to scleral show and ectropion through snap-back test having infraorbital incision were reviewed. We monitored the duration of the surgery, and complications resulted from the incision. We evaluated the scars with the researcher's observations and with the patient's level of satisfaction on a scale of 1 to 5. Results: On average, 5 minutes was spent between the skin incision and the fracture exposure. No case of scleral show and ectropion occurred. One year follow-up observation revealed 4 cases of visible scars, 9 cases of barely visible scars, and 7 cases of invisible scars. The subjective satisfaction level of the patients' scar is an average of 4.0. Conclusion: Infraorbital incision has many advantages. First, it can reduce the complications such as scleral show and ectropion. Second, it can shorten the operation time. Third, it can diminish incision-related scars.

• 대한방사선기술학회지:방사선기술과학
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• 제40권2호
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• pp.187-195
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• 2017

상안면부 외상(upper facial trauma)의 초기진단에서 standard Water's view (S-Water's)는 여러 구조물의 중첩과 얇은 뼈의 해부학적 특성 때문에 검사 시 적절한 노출조건, 정확한 환자위치잡이, 환자의 도움, 촬영자의 전문성과 숙련도가 필요하다. 본 연구는 엎드린 자세가 불가능한 경우 안와 골절에 대한 진단적 가치를 높이고 자 reverse Water's view (R-Water's)의 적절한 각도를 찾고자 하였다. 인체모형 팬텀를 사용하였고, 촬영조건은 75 kVp, 400 mA, 45 ms, 1 mAs, SID 100 cm였다. 검사방법은 팬텀을 테이블에 똑바로 누운 자세에서 orbito-meatal line (OML)의 각도를 $0^{\circ}$에서 $50^{\circ}$ 범위에서 촬영 각도를 조절하여 영상을 얻었다. R-Water's 영상 평가는 자체 개발한 평가항목을 토대로 분석하였다. 세부항목으로는 상악동(maxillary sinus), 관골궁(zygomatic arch), 추체부(petrous ridge)와 영상왜곡(image distortion)이었다. 통계분석은 Kippendorff's alpha와 kappa를 확장한 Fleiss' kappa를 적용하였다. 각 항목별 총 세 명의 평가자에 대한 일치도는 상악동, 0.957 (0.903, 0.995); 관골궁, 0.939 (0.866, 0.987); 추체부, 0.972 (0.897, 1.000); 영상 왜곡, 0.949 (0.830, 1.000)로 모두 높았다. 측정별 각도 구간을 분석에 대한 high-quality (HI)와 perfect agreement (PA)로 정의하여 각 항목별로 점수화한 결과, 상악동 ($36^{\circ}-44^{\circ}$), 관골궁 ($33^{\circ}-40^{\circ}$), 추체능선 ($32^{\circ}-50^{\circ}$), 영상왜곡 ($44^{\circ}-50^{\circ}$)구간에서 높았다. 본 연구결과 상안면부 외상환자에 있어 똑바로 누운 자세에서의 R-Water's의 적정 각도는 $36^{\circ}-40^{\circ}$로 판단된다. 본 연구결과는 단순촬영을 통한 안면부 골절의 신속한 진단에 도움을 줄 것으로 사료된다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제21권1호
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• pp.54-59
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• 1999

1992년 1월 1일부터 1996년 12월 31일까지 본과에 입원하여 치료받은 환자중 추적이 가능한 관골 골절 환자 164명을 대상으로 후향적, 임상통계학적으로 비교 분석하여 다음과 같은 결과를 얻었다. 관골 골절 환자의 연령 분포의 범위는 8세부터 78세까지로 평균연령은 35.6세였고, 성별 분포는 7:1로 남성에서 호발하였다. 월별로는 10월(14.0%)과 8월(11.6%)에 많았고 계절별로는 가을(31.1%), 여름(25.6%), 겨울(23.2%), 봄(20.1%)의 순이었다. 발생시각별 분포는 21~24시 (34.2%)와 1~4시 (21.3%)에 많았고, 원인별로는 교통사고(53.7%)가 가장 많은 분포를 보였다. 관골 골절의 분류에 따른 분포는 class IV(33.5%)와 class III(25.6%)가 많았고, 동반된 안면부 골절은 164명중 114명(69.5%)에서 147례가 발생하였으며, 그중 상악골 골절이 52.4%로 가장 많았다. 내원 방법은 응급실을 통해 내원한 경우가 72.3%, 외래를 통해 내원한 경우가 26.8%였으며, 타과와의 연관 손상이 있는 경우는 37.2%였다. 수상후 수술을 받을때까지 경과된 시간은 5 일 이내가 36.6%로 가장 많았으며, 접근방법으로는 구내절개법(57.1%)과 눈썹절개법(38.4%)이 많이 사용되었다. 술후 합병증으로는 안구 함몰증(7.3%), 안모 비대칭 (6.7%), 감각저하(6.1%), 복시 (2.4%) 등이 발생하였다. 이상의 결과에서 관골 골절시에는 골절의 정도와 동반 골절 및 연관 손상에 대한 정확한 진단과 치료가 필요하고 타과와의 유기적인 협조하에 적절한 처치를 해줌으로써 술후 합병증을 줄일 수 있으리라 사료된다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제16권1호
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• pp.99-103
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• 1994

협골체 골절시 접근방법은 안와하연에 대해 섬모하절개, 하안검절개, 안와하연절개 및 결막절개등이 사용되고 안와측벽, frontozygomatic suture에 대해서는 lateral brow incision, 상안검절개등이 사용되며 관상절개술은 frontozygomatic suture와 협골궁에 접근할 수 있다. 관상절개술을 제외한 접근방법은 한가지 절개술로 단지 한부위의 정복과 고정술이 가능하므로 결국 협골체 골절시 2점이상 고정을 할 경우 2가지 이상의 절개가 필요하게 된다. 이에 저자들은 관상절개술의 적응증이 아닌 협골체 골절에 lateral-canthotomy-conjunctival incision을 사용하여 안와하연 및 측벽의 골절부에 대한 정복술과 고정술을 시행하여 양호한 결과를 관찰하여 이에 보고하는 바이다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제17권3호
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• pp.264-276
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• 1995

This is a clinical and retrospective study on the patients with oral and maxillofacial trauma. This study was based on a series of 917 patients were treated as in-patients, at Chon-buk National University Hospital, during the period of Jan., 1989 through Dec., 1993. The results obtained were as follows : 1. The ratio of men to women were 3.59 : 1 in oral and maxillofacial injuries, 3.92 : 1 in facial bone fractures, and 3.18 : 1 in soft tissue injuries. 2. The oral and maxillofacial injuries occurred most frequently in the third decade(32.2%), and fourth, second, fifth decade in orders. 3. The major etiologic factors were traffic accident(57.4%) and fall-down(17.1%), interpersonal accident(16.6%), and industrial accident were next in order of frequency. 4. The incidence of facial bone fracture was 72.1%, soft tissue injury 58.8%, and dental injury 40.5%. 5. The most common site of fracture were mandible(62.9%) and maxilla(19.9%), zygoma and zygomatic arch(18.7%), and nasal bone(4.7%) were next in order of frequency. 6. The most common type of soft tissue injury was laceration(51.0%). The lesion of soft tissue injuries were mostly 1 or 2 lesions and deep.

• 대한방사선기술학회지:방사선기술과학
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• 제46권4호
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• pp.315-323
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• 2023

Post-mortem computed tomography (PMCT) is commonly employed in the field of forensic pathology. PMCT was mainly performed using a whole-body scan with a wide field of view (FOV), which lead to a decrease in spatial resolution due to the increased pixel size. This study aims to evaluate the potential for developing a super-resolution model based on conditional generative adversarial networks (CGAN) to enhance the image quality of CT. 1761 low-resolution images were obtained using a whole-body scan with a wide FOV of the head phantom, and 341 high-resolution images were obtained using the appropriate FOV for the head phantom. Of the 150 paired images in the total dataset, which were divided into training set (96 paired images) and validation set (54 paired images). Data augmentation was perform to improve the effectiveness of training by implementing rotations and flips. To evaluate the performance of the proposed model, we used the Peak Signal-to-Noise Ratio (PSNR), Structural Similarity Index Measure (SSIM) and Deep Image Structure and Texture Similarity (DISTS). Obtained the PSNR, SSIM, and DISTS values of the entire image and the Medial orbital wall, the zygomatic arch, and the temporal bone, where fractures often occur during head trauma. The proposed method demonstrated improvements in values of PSNR by 13.14%, SSIM by 13.10% and DISTS by 45.45% when compared to low-resolution images. The image quality of the three areas where fractures commonly occur during head trauma has also improved compared to low-resolution images.