• The Journal of Advanced Prosthodontics
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• 제5권4호
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• pp.494-501
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• 2013

PURPOSE. The purpose of this study was to provide an actual guideline in determining the shape, diameter, and position of the implant in immediate implantation by the measurement of the thickness of facial and palatal plate, the thickness of cortical bone on the facial and palatal plate, the diameter of the root, and the distance between the roots in the cadavers. MATERIALS AND METHODS. The horizontal sections of 20 maxillae were measured and analyzed to obtain the average values. Resin blocks were produced and cut serially at 1 mm intervals from the cervical line to the root apex. Images of each section were obtained and the following measurements were performed: The thickness of the facial and palatal residual bone at each root surface, the thickness of the facial and palatal cortical bone at the interdental region, the diameter of all roots of each section on the faciopalatal and mesiodistal diameter, and the interroot distance. Three specimens with measurements close to the average values were chosen and 3-dimensional images were reconstructed. RESULTS. The thickness of the facial and palatal cortical bone at the interdental region in the maxilla, the buccal cortical bone was thicker in the posterior region compared to the anterior region. The interroot distance of the alveolar bone thickness between the roots increased from anterior to posterior region and from coronal to apical in the maxilla. CONCLUSION. In this study, the limited results of the morphometric analysis of the alveolar ridge using the sections of maxilla in the cadavers may offer the useful information when planning and selecting optimal implant for immediate implantation in the maxilla.

• 대한소아치과학회지
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• 제32권1호
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• pp.109-118
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• 2005

소아치과 영역에서 아동의 두부방사선 계측치의 비교분석은 성장과 발육의 평가에 중요하며 부정교합의 조기진단과 치료를 위한 두개 안면부의 형태, 성장 양상을 아는 것에 필수적이다. 이를 위하여 두부방사선 계측학적 표준치가 중요한데 유치열기에 관한 연구는 많지 않으므로 유치열기 정상교합 아동의 표준치를 얻고 과거 연구에서의 계측치와 비교하고자 서울시내 소재의 유아원 아동 중 유치열기의 정상교합을 가진 4세에서 5세 아동으로 본원에 내원한 안모 및 전신 발육 상태가 양호한 아동 46명을 대상으로 측모 두부방사선 계측 사진을 촬영, 분석하여 다음과 같은 결과를 얻었다. 1. 골격성 계측항목에서 각도 계측치는 남녀사이에 유의한 차이가 없고 길이 계측치는 남자가 여자보다 전반적으로 큰 수치를 보였다. 2. SNA는 $81.3^{\circ}$, SNB는 $76.6^{\circ}$, ANB difference는 $4.7^{\circ}$를 나타냈다. 3. Anterior cranial base length에 대한 Mandibular body length의 비율은 남녀모두 0.9:1이었고 Anterior facial height에 대한 Posterior facial height의 백분율은 남자 61.4%, 여자 62.0%를 나타냈다. 4. 치성 계측항목에서는 IMPA는 $84.2^{\circ}$, UA to SN은 $90.8^{\circ}$를 나타냈다. 5. Ricketts의 심미선에 대하여 상순은 2.6mm, 하순은 2.5mm 전방으로 위치하고 있었다.

• 감성과학
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• 제19권1호
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• pp.21-30
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• 2016

본 연구는 성별과 연령, 감성차원(날카롭다/부드럽다, 앳되다/성숙하다)에 따라 얼굴매력에 대한 평가가 달라지는지 알아보고자 하였다. 본 연구는 각 참가자들에게 60개의 여성 얼굴 사진에 대하여 9점 척도로 이루어진 세 차원('날카롭다/부드럽다', '앳되다/성숙하다', '전혀 매력적이지 않다/매력적이다')에 평정하도록 제시하였고, 총 131명이 참가하였다(초등학생: 48명, 중학생: 44명, 대학생: 39명; 남자: 60명, 여자: 71명). 연구 결과를 알아보기 위하여 다층분석을 실시하였다. 성별과 세 연령집단 모두 얼굴이 앳될수록, 부드러울수록 매력적으로 평가하였다. 한편 성별과 연령에 따른 매력 정도의 차이가 있었다. 대학생이 초등학생과 중학생보다 매력을 더 높게 평가하였고 남자보다 여자가 동일한 사진을 더 매력적으로 평가하였다. 또한 대학생과 초등학생 간의 '날카롭다/부드럽다' 차원의 평가가 유의미하게 달랐으며, 이는 대학생보다 초등학생에게 '날카롭다/부드럽다' 차원이 얼굴매력 평정에 더 크게 영향을 미치는 것으로 해석된다. 본 연구 결과는 얼굴이 앳될수록, 부드러울수록 얼굴을 매력적이라고 판단하지만, 감성차원이 매력에 미치는 효과가 성별과 연령에 따라 차이가 있음을 시사한다.

• Journal of Acupuncture Research
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• 제30권4호
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• pp.115-123
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• 2013

Objectives : This study was performed to confirm the usefulness of EMG and early-performed ENoG as predicting factor for facial palsy by clinical outcome. Methods : We gathered patients who visited the Facial Palsy Center in Kyung Hee University Hospital at Gangdong between January 2010 and September 2012. We used inclusion/exclusion criteria and reviewed 231 patients' medical records including gender, age, HB grade and EMG & ENoG axonal loss. We compared the relation between EMG axonal loss and improvement degree at 4 & 6 weeks after treatment, and between ENoG axonal loss at 3-5 & 6-8 days after onset and EMG axnoal loss using regression analysis. Results : Each analysis had statistical significance, but EMG & improvement degree at 6 weeks after treatment showed statistically higher correlation than that at 4 weeks after treatment, and ENoG at 6~8 days after onset & EMG showed statistically higher correlation than that at 3~5 day after onset. Conclusions : We could get the evidence of the validity of EMG and early-performed ENoG as predicting factor for facial palsy based on collaborative treatment between Korean and western medicine.

• 지식경영연구
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• 제23권2호
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• pp.143-168
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• 2022

본 연구는 Herzberg의 동기-위생이론을 이용하여 모바일 안면인식결제서비스의 수용 및 저항에 미치는 영향과, 사용자의 혁신성이 동기요인과 위생요인에서 수용과 저항에 미치는 영향 또한 조사하였다. 모바일 결제서비스 이용 경험이 있는 중국의 사용자를 대상으로 설문조사를 하였으며, 통계 분석은 IBM SPSS Statistics 26과 SmartPLS 3.0을 이용하였다. 분석결과, 모바일 안면인식결제서비스의 동기요인은 수용에 정(+)의 영향을 미치고 있으며, 저항에는 유의한 결과가 나타나지 않았다. 또한 위생요인은 수용에서는 부(-)의 영향을, 저항에는 정(+)의 영향을 미치는 것으로 나타났다. 매개변수인 사용자 혁신성은 동기요인과 수용에서는 완전매개효과를, 위생요인과 저항에서는 부분매개효과가 있었다. 연구결과를 통해 발견된 동기 요인인 신속성, 편재성, 지각된 유용성, 지각된 사용용이성, 비접촉성과 위생 요인인 프라이버시 염려, 보안성, 현상유지관성, 사용장벽, 손실회피성은 모바일 안면인식결제서비스의 활성화를 위한 기초자료로 사용될 수 있을 것으로 판단한다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제38권1호
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• pp.38-43
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• 2012

Introduction: The location of parotid gland tumors in the superficial or deep lobes can affect the time and difficulty of operations. Therefore, accurate preoperative evaluation of the tumor location is important for surgical outcomes. Materials and Methods: A total of 16 patients with parotid gland tumors and who underwent a parotidectomy between April 2003 and March 2011 were retrospectively reviewed in terms of demographic background, tumor location, surgical treatment, and treatment outcomes. Tumor location was estimated by four landmarks on contrast enhanced computerized tomography scans, which were Conn's arc, the facial nerve (FN) line, the Utrecht line, and the retromandibular vein. Tumor location was confirmed by relative position depending on the facial nerve during surgery. It was assumed positive since the tumor lies in the superficial lobe of the parotid gland, the sensitivity, specificity, positive predictive value, negative predictive value, and efficiency of each landmark were evaluated. Results: Our result revealed that the facial nerve line had a sensitivity of 83.3%, specificity of 100%, positive predictive value of 100%, negative predictive value of 71.4%, and efficiency of 87.5%. Some would be more efficient preoperative evaluation methods of the relationship of parotid gland tumors to the facial nerve than others. Conclusion: In our study, the FN line was found to be the most reliable analysis method.

• 대한치과교정학회지
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• 제48권6호
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• pp.357-366
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• 2018

Objective: The purpose of this study was to analyze the transverse dental compensation in reference to the maxillary and mandibular basal bones using cone-beam computed tomography (CBCT) and evaluate the correlations between transverse dental compensation and skeletal asymmetry variables in patients with skeletal Class III malocclusion and facial asymmetry. Methods: Thirty patients with skeletal Class I (control group; 15 men, 15 women) and 30 patients with skeletal Class III with menton deviation (asymmetry group; 16 men, 14 women) were included. Skeletal and dental measurements were acquired from reconstructed CBCT images using OnDemand3D 1.0 software. All measurements were compared between groups and between the deviated and nondeviated sides of the asymmetry group. Correlation coefficients for the association between skeletal and dental measurements were calculated. Results: Differences in the ramus inclination (p < 0.001), maxillary canine and first molar inclinations (p < 0.001), and distances from the canine and first molar cusp tips to the midmaxillary or midmandibular planes (p < 0.01) between the right and left sides were significantly greater in the asymmetry group than in the control group. In the asymmetry group, the ramus inclination difference (p < 0.05) and mandibular canting (p < 0.05) were correlated with the amount of menton deviation. In addition, dental measurements were positively correlated with the amount of menton deviation (p < 0.05). Conclusions: Transverse dental compensation was correlated with the maxillary and mandibular asymmetry patterns. These results would be helpful in understanding the pattern of transverse dental compensation and planning surgical procedure for patients with skeletal Class III malocclusion and facial asymmetry.

• 지능정보연구
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• 제11권1호
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• pp.95-105
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• 2005

얼굴인식을 이용해 출입을 통제하는 보안 시스템에 있어서 얼굴인식성능은 인증 대상의 변화 (표정, 헤어스타일, 나이, 화장)에 커다란 영향을 받는다. 이처럼 수시로 변화하는 환경 변화를 보완하기 위하여 일반적인 얼굴인식 시스템에서는 일정한 보안 임계치를 설정해두고 임계치 내에 포함되는 얼굴을 기존에 등록된 얼굴과 교체하거나 추가적으로 등록하는 업데이트 방식이 사용되고 있다. 그러나 이러한 방식은 부정확한 매칭 결과를 보이거나, 유사한 얼굴에 쉽게 반응할 수 있다. 따라서 우리는 각 얼굴간의 유사도나 인증 대상의 변화를 흡수하며, 잘못된 얼굴 등록을 방지하기 위한 방법으로 학습 성능이 우수한 유전자 알고리즘을 제안하고자 한다. 변화가 심하고 유사한 얼굴영상(한사람 당 10개씩의 변화된 300개의 얼굴 영상)에 대하여 실험을 수행하였고, 얼굴인식기법은 주성분 분석에 기초한 고유얼굴을 이용하였다. 제안된 방식은 기존 얼굴인식 출입통제 시스템에 비해 우성인자의 인식률을 향상뿐만 아니라 유사 얼굴(열성인자)에 반응하는 비율을 감소시키는 효과를 보였다.

• Archives of Plastic Surgery
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• 제38권6호
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• pp.775-782
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• 2011

Purpose: Nasal bone fracture is most common facial bone fracture. The cause of fractures is mainly trauma such as fighting, automobile accident and fall down, and it commonly involves young males. Very frequently nasal bone fractures are associated with other facial injuries such as orbital bone fracture, maxillary bone fracture and nasal septal deformities. Because of various dynamic directions of power are involved, phenomenon of fractures are also various and treatment cannot be simple. Methods: We studied and analyzed retrospectively 452 cases nasal bone fractures from January 2008 to December 2010. Diagnosis were made with physical examination, Nasal bone X-rays, Facial bone CT and 3D facial bone CT. Four surgeons are involved in treatments of these patients and applied different procedure along patient's condition and deformity. We analyzed the cause of nasal bone fractures, deformities, associate injuries and applied surgical technique, and patient's satisfaction rate. In this study, old nasal bone fractures were excluded. Results: Young male group was most commonly sustained nasal bone fracture and physical violence was most common cause of injury. 64 of 452 patient was involved associate injuries of face. Closed reduction were applied 246 cases and C-arm quide reduction were 167 cases and in 20 cases lateral osteotomy were applied. Approximately, more than 80% of the Patients were satisfied with the outcomes. Conclusion: Diagnosis and treatment of nasal bone fractures are considered simple but because of various deformity and associate injuries, treatment is not always simple and universal. Time to time, we face unsatisfied patient after treatment of nasal bone fractures. For obtaining satisfactory result, cause of injury and state of deformities and associate injuries such as nasal septal deformity should be evaluated properly and proper treatment should be applied.

• The Korean Journal of Pain
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• 제14권1호
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• pp.56-60
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• 2001

Background: Conventional thoracoscopic sympathectomy or sympathicotomy is an effective method in treating localized hyperhidrosis; however, this may result in a postoperatively compensatory hyperhidrosis or facial anhidrosis in the treatment of palmar hyperhidrosis. We modified the conventional sympathicotomy by limiting the extent of nerve transection (limited T3 sympathicotomy) since May 1998. However, there are many reports of a good short-term outcome of limited T3 sympathicotomy. Therefore, we reviewed long-term follow-up of limited T3 sympathicotomy based on outcomes analysis using a questionnaire. Methods: Fifty four patients with palmar hyperhidrosis underwent a limited T3 sympathicotomy between May 1998 and March 1999 and had a complete follow-up over two years using a questionnaire (the mean follow-up was 2.6 years). The patients' postoperative satisfaction was determined by their subjective responses to the questionnaires; the degree of compensatory hyperhidrosis, the effects on foot hyperhidrosis, gustatory hyperhidrosis and facial dryness, and recurrence, and patient's satisfaction. Results: Of the total, 87% of patients had a compensatory hyperhidrosis and 3.7% of them were disabled. 31.5% of patients showed improvement in foot hyperhidrosis, while 68.5% of patients demonstrated no change or got worse. 31.5% of patients had gustatory hyperhidrosis and facial dryness and 22.2% of patients showed a mild palmar hyperhidrosis. The postoperative patients' satisfaction was significantly in 96.3% of patients. Conclusions: The limited T3 sympathicotomy is a highly effective treatment of palmar hyperhidrosis and has a low rate of postoperative compensatory hyperhidrosis, gustatory hyperhidrosis, and facial dryness.