• Archives of Plastic Surgery
• /
• 제34권4호
• /
• pp.455-460
• /
• 2007

Purpose: Aging society was realized after persons over 65 was rated above 7% in 2000. It is inevitable fact that society gets older. Few study about facial bone fracture in elderly was reported until now. This study provides a retrospective statistical analysis of facial bone fracture and reports of some demographical information from medical records. Methods: From January 2000 to December 2005, 123 cases of facial bone fracture in above 55 year-old persons were reviewed and analysed. Statistic data was related to distribution, age, sex, causes, occupations, occurrence, time, incidence of facial bone fracture, treatment and it's complications. Results: Facial bone fractures in elderly tend to increase and rated to 4.7%. Facial bone fractures in elderly were most frequently occurred in farmers, cultivator accidents and zygoma fractures. A few minor complications were checked, but easily improved. Conclusion: Facial bone fractures in elderly have small proportion of the whole facial bone fractures, but gradually have been increased. This study was observed trends in changes of facial bone fracture in elderly for 5 years and expected to provide statistical index to prevent facial bone fracture in elderly.

• 대한두개안면성형외과학회지
• /
• 제21권6호
• /
• pp.337-344
• /
• 2020

Facial paralysis is a devastating disease, the treatment of which is challenging. The use of the masseteric nerve in facial reanimation has become increasingly popular and has been applied to an expanded range of clinical scenarios. However, appropriate selection of the motor nerve and reanimation method is vital for successful facial reanimation. In this literature review on facial reanimation and the masseter nerve, we summarize and compare various reanimation methods using the masseter nerve. The masseter nerve can be used for direct coaptation with the paralyzed facial nerve for temporary motor input during cross-facial nerve graft regeneration and for double innervation with the contralateral facial nerve. The masseter nerve is favorable because of its proximity to the facial nerve, limited donor site morbidity, and rapid functional recovery. Masseter nerve transfer usually leads to improved symmetry and oral commissure excursion due to robust motor input. However, the lack of a spontaneous, effortless smile is a significant concern with the use of the masseter nerve. A thorough understanding of the advantages and disadvantages of the use of the masseter nerve, along with careful patient selection, can expand its use in clinical scenarios and improve the outcomes of facial reanimation surgery.

• Annals of Clinical Neurophysiology
• /
• 제13권1호
• /
• pp.44-47
• /
• 2011

Background: Miller-Fisher syndrome (MFS) is characterized by the clinical triad of ophthalmoplegia, ataxia, and areflexia, and is considered a variant form of Guillain-Barre syndrome. Although some cases of delayed-onset facial palsy in MFS have been reported, the characteristics of this facial palsy are poorly described in the literature. Methods: Between 2007 and 2010, six patients with MFS were seen at our hospital. Delayed facial palsy, defined as a facial palsy that developed while the other symptoms of MFS began to improve following intravenous immunoglobulin treatment, was confirmed in four patients. The clinical and electrophysiological characteristics of delayed facial palsy in MFS, as observed in these patients, are described here. Results: Four patients with delayed-onset facial palsy were included. Delayed facial palsy developed 8-16 days after initial symptom onset (5-9 days after treatment). Unilateral facial palsy occurred in three patients and asymmetric facial diplegia in one patient. The House-Brackmann score of facial palsy was grade III in one patient, IV in two patients, and V in one patient. None of the patients complained of posterior auricular pain. Facial nerve conduction studies revealed normal amplitude in all four patients. The blink reflex showed abnormal prolongation in two patients and the absence of action potential formation in two patients. Facial palsy resolved completely in all four patients within 3 months. Conclusions: Delayed facial palsy is a frequent symptom in MFS and resolves completely without additional treatment. Thus, standard treatment and patient reassurance are sufficient in most cases.

• Archives of Plastic Surgery
• /
• 제42권4호
• /
• pp.461-468
• /
• 2015

Background Functional restoration of the facial expression is necessary after facial nerve resection to treat head and neck tumors. This study was conducted to evaluate the functional outcomes of patients who underwent facial nerve cable grafting immediately after tumor resection. Methods Patients who underwent cable grafting from April 2007 to August 2011 were reviewed, in which a harvested branch of the sural nerve was grafted onto each facial nerve division. Twelve patients underwent facial nerve cable grafting after radical parotidectomy, total parotidectomy, or schwannoma resection, and the functional facial expression of each patient was evaluated using the Facial Nerve Grading Scale 2.0. The results were analyzed according to patient age, follow-up duration, and the use of postoperative radiation therapy. Results Among the 12 patients who were evaluated, the mean follow-up duration was 21.8 months, the mean age at the time of surgery was 42.8 years, and the mean facial expression score was 14.6 points, indicating moderate dysfunction. Facial expression scores were not influenced by age at the time of surgery, follow-up duration, or the use of postoperative radiation therapy. Conclusions The results of this study indicate that facial nerve cable grafting using the sural nerve can restore facial expression. Although patients were provided with appropriate treatment, the survival rate for salivary gland cancer was poor. We conclude that immediate facial nerve reconstruction is a worthwhile procedure that improves quality of life by allowing the recovery of facial expression, even in patients who are older or may require radiation therapy.

• 동의생리병리학회지
• /
• 제27권3호
• /
• pp.327-330
• /
• 2013

The purpose of this study is to report a clinical progress of treatment of sequelae caused by removal of facial schwannoma through Korean medicine. A patient was diagnosed with facial schwannoma by MRI on 4th June 2012 in local university hospital, he had right facial palsy, auditory hypersensitivity, dizziness after removal of facial schwannoma. Between 25th July 2012 and 26th January 2013, he was treated with acupuncture, cupping, electro-acupuncture every week and observed by House-Brackmann facial nerve grading system(H-B scale) and MoReSS every month. He had 29 times treatments. At the first of treatment, his state was Grade IV (H-B scale), 4/8(facial nerve grading), 10 points during action 7 points during rest(MoReSS) and he had severe facial palsy, ill-acrimation, auditory hypersensitivity. At the middle of treatment, October 2012, symptoms improved. State was Grade III (H-B scale), 5/8(facial nerve grading), 7 points during action 3 points during rest(MoReSS). Severe facial palsy improved ; Forehead creasing and union motor function recovered, he was able to close his eyes so ill-acrimation improved. At the end of treatment, January 2012, state was Grade II (H-B scale), 7.5/8(facial nerve grading), 3 points during action 1 point during rest(MoReSS). He had only occasional tinnitus and auditory hypersensitivity. Acupuncture and electro-acupuncture are estimated to be good for facial palsy after removal of facial schwannoma. More cases are required to develop treatment of facial palsy.

• Archives of Plastic Surgery
• /
• 제35권5호
• /
• pp.514-520
• /
• 2008

Purpose: Many attempts have been made to describe ideal facial proportions for over two thousands year and constantly lasted till now. Dr. Marquardt has derived supposedly ideal facial proportions from the facial golden mask using golden ratio of 1 : 1.618. On the other hand, facial reducing surgeries such as mandible angle reduction are popularized in Asia because the width of mid and lower face of Korean is recognized to be wider. The purpose is to analyze characters of Korean university students' faces in horizontal plane and establish the objective data for facial width distributions and clinical applications. Methods: We applied the facial golden mask to the photographs in 1000 cases, compared the width of mid and lower face between the facial golden mask and Korean university students' faces. And we first calculated the horizontal ratio(HR) of middle and lower face each for using comparative scale of width, facial golden mask. We divided 1,000 cases into 3 groups by degrees of HR and analyzed data of HR on each groups. Using calculated horizontal ratio, we newly invented the cumulative frequency of distribution graphs in Korean university students' faces. Results: Mean data of HR were over 1.0 in all groups, which means that Korean university students' faces are typically wider than facial golden mask in horizontal planes. And this study was statistically significant(p- value < 0.05). Clinically using the cumulative frequency distributions of Korean university students' face width, we can easily explain changes of facial width to patient after facial reducing surgery and describe the changes into objective data. Conclusion: This study concludes thatKorean university students' faces are wider than facial golden mask is significantly true and the cumulative frequency of distribution graphs are expected to be widely used for comparison of results in facial reducing surgery.

• 한국HCI학회:학술대회논문집
• /
• 한국HCI학회 2007년도 학술대회 1부
• /
• pp.667-674
• /
• 2007

Facial expressions provide significant clues about one's emotional state; however, it always has been a great challenge for machine to recognize facial expressions effectively and reliably. In this paper, we report a method of feature-based adaptive motion energy analysis for recognizing facial expression. Our method optimizes the information gain heuristics of ID3 tree and introduces new approaches on (1) facial feature representation, (2) facial feature extraction, and (3) facial feature classification. We use minimal reasonable facial features, suggested by the information gain heuristics of ID3 tree, to represent the geometric face model. For the feature extraction, our method proceeds as follows. Features are first detected and then carefully "selected." Feature "selection" is finding the features with high variability for differentiating features with high variability from the ones with low variability, to effectively estimate the feature's motion pattern. For each facial feature, motion analysis is performed adaptively. That is, each facial feature's motion pattern (from the neutral face to the expressed face) is estimated based on its variability. After the feature extraction is done, the facial expression is classified using the ID3 tree (which is built from the 1728 possible facial expressions) and the test images from the JAFFE database. The proposed method excels and overcomes the problems aroused by previous methods. First of all, it is simple but effective. Our method effectively and reliably estimates the expressive facial features by differentiating features with high variability from the ones with low variability. Second, it is fast by avoiding complicated or time-consuming computations. Rather, it exploits few selected expressive features' motion energy values (acquired from intensity-based threshold). Lastly, our method gives reliable recognition rates with overall recognition rate of 77%. The effectiveness of the proposed method will be demonstrated from the experimental results.

• 대한인간공학회지
• /
• 제31권3호
• /
• pp.427-435
• /
• 2012

The aim of this study is to investigate facial temperature changes induced by facial expression and emotional state in order to recognize a persons emotion using facial thermal images. Background: Facial thermal images have two advantages compared to visual images. Firstly, facial temperature measured by thermal camera does not depend on skin color, darkness, and lighting condition. Secondly, facial thermal images are changed not only by facial expression but also emotional state. To our knowledge, there is no study to concurrently investigate these two sources of facial temperature changes. Method: 231 students participated in the experiment. Four kinds of stimuli inducing anger, fear, boredom, and neutral were presented to participants and the facial temperatures were measured by an infrared camera. Each stimulus consisted of baseline and emotion period. Baseline period lasted during 1min and emotion period 1~3min. In the data analysis, the temperature differences between the baseline and emotion state were analyzed. Eyes, mouth, and glabella were selected for facial expression features, and forehead, nose, cheeks were selected for emotional state features. Results: The temperatures of eyes, mouth, glanella, forehead, and nose area were significantly decreased during the emotional experience and the changes were significantly different by the kind of emotion. The result of linear discriminant analysis for emotion recognition showed that the correct classification percentage in four emotions was 62.7% when using both facial expression features and emotional state features. The accuracy was slightly but significantly decreased at 56.7% when using only facial expression features, and the accuracy was 40.2% when using only emotional state features. Conclusion: Facial expression features are essential in emotion recognition, but emotion state features are also important to classify the emotion. Application: The results of this study can be applied to human-computer interaction system in the work places or the automobiles.

• Journal of Trauma and Injury
• /
• 제22권1호
• /
• pp.18-23
• /
• 2009

Purpose: In this study, we retrospectively investigated the medical records of patients with facial fractures and suspected cranial injuries in order to determine if there was any relationship between various facial fracture patterns and cranial injuries. Methods: Medical records were reviewed to identify patients diagnosed with facial fractures who underwent cranial computed tomography (CT) scans. Records were reviewed for gender, age, injury mechanism, facial fracture pattern, and presence or absence of cranial injuries. Facial fracture patterns were classified as isolated fractures (tripod, zygomatic arch, maxilla, orbit, and mandible), combined fractures, or total fractures. Cranial injuries included skull fractures, traumatic subarachnoid hemorrhages, subdural hemorrhages, epidural hemorrhages, and contusional hemorrhages. All cranial injuries were established by using cranial CT scans, and these kinds of cranial injuries were defined radiologically-proven cranial injuries (RPCIs). We evaluated the relationship between each pattern of facial fractures and the incidence of RPCIs. Results: Of 132 eligible patients with facial fractures who underwent cranial CT scans, a total of 27 (20.5%) patients had RPCIs associated with facial fractures. Falls and slips were the most common causes of the fractures (31.8%), followed by assaults and motor vehicle accidents (MVAs). One hundred one (76.5%) patients had isolated facial fractures, and 31 (23.5%) patients had combined facial fractures. Fractures were found most commonly in the orbital and maxillary bones. Patients with isolated maxillary fractures had a lower incidence of RPCIs than those with total mandibular fractures. RPCIs frequently accompanied combined facial fractures. Conclusion: Combined facial fractures had a significant positive correlation with RPCIs. This means that facial fractures caused by stronger or multidirectional external force are likely to be accompanied by cranial injuries.

• 한국컴퓨터정보학회논문지
• /
• 제12권2호
• /
• pp.21-28
• /
• 2007

얼굴모델링과 애니메이션에 대한 기술은 컴퓨터 그래픽스 분야에서 오랫 동안 연구되어 오고 있는 분야 중 하나이다. 얼굴모델링 기술은 가상현실, MPEG-4 등의 연구목적과 영화, 광고, 게임 등의 산업 분야에서 많이 활용되고 있다. 따라서 좀 더 사실적인 인터페이스의 구현을 위하여 컴퓨터 의인화를 통해 인간과 상호작용 할 수 있는 3D 얼굴모델 개발은 필수적이다. 본 연구에서는 임의의 정면 얼굴 이미지를 이용하여 간편한 조작으로 3D 얼굴모델을 생성하는 시스템을 개발하였다. 이 시스템은 한국인 표준 얼굴모델을 이용하여 메쉬상의 조정점을 얼굴 부위와 윤곽에 맞게 정합한 다음 유동적이고 탄력적으로 조정하여 3D 얼굴모델을 생성하며, 그 결과인 3D 얼굴모델을 이동, 확대, 축소, 회전시켜 가며 실시간으로 확인 및 수정할 수 있다. 개발한 시스템의 유용성을 검증하기 위해 $630{\times}630$의 크기를 가지는 30개의 임의의 정면 얼굴이미지를 가지고 실험했다.