• 패션비즈니스
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• 제22권3호
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• pp.57-66
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• 2018

The purpose of this study is to gather basic data in the special effects make-up field and to provide a source of inspiration for creative make-up design by examining how special effects make-up is developed according to representative films. Two approaches are used in this study: a literature review and an empirical case analysis. In Korea, color TV was introduced in the 1980s, with the demand for a realistic image. Since the 2000s, 3D printing technology has been introduced to special effects make-up. Special effects make-up was first introduced in Hollywood films in the 1890s, and by the 1900s, artificial teeth and eyebrows were added and presented using general make-up techniques. Since then, 3D and 4D technologies and animation performance capture methods have been introduced and distributed due to the rapid development of computer technology.

• 대한치과의사협회지
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• 제55권1호
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• pp.82-89
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• 2017

Proponents of bilaterally balanced occlusion believe that this occlusal concept is important for denture retention and stability. However, the critical appraisal of the literature reveals no scientific evidence to support the bilaterally balanced occlusion as the ideal occlusal concept for conventional complete dentures. Current evidence suggests that the occlusal concept has little influence on clinical outcomes or patient satisfaction. Additional randomized controlled clinical trials should be developed taking into account the influence of mucosal resiliency, alveolar ridge anatomy, and parafunctional activities on occlusal concept choice. In this paper, various types of complete denture occlusion (bilaterally balanced occlusion, lingualized occlusion, canine-guided occlusion) will be reviewed and compared.

• 대한치과의사협회지
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• 제50권9호
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• pp.574-585
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• 2012

Purpose : This study was performed to evaluate the healing response around the root perforation restorative material. Materials and Methods : Four beagle dogs were used for experimental study. Endodontic treatment was performed at four maxillary premolars and artificial perforation was formed at furcation area of pulp chamber. Canal was filled with gutta percha cone and the perforation was sealed with MTA at group 1. At group 2, canal was filled and the perforation was sealed with dentin paste. Tooth paste was fabricated using extracted human teeth. Histologic examination of furcation area was performed 2, 4, 8 and 12 weeks after experiment. Results : New trabecular bone formation was observed around the MTA and tooth paste. Lamellar bone was observed as time is over. There were no inflammatory reaction in both groups. Conclusion : There is a possibility which endodontic filling material can be developed using extracted teeth.

• 구강회복응용과학지
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• 제36권2호
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• pp.121-127
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• 2020

상악 무치악 환자에서 치료 방법을 결정하는데 있어 생역학적 고려사항과 함께 전치부 치아에 대한 환자의 심미적 요구도 고려될 수 있다. 이 증례 보고는 전치부의 임플란트 고정성 보철물과 구치부의 후방 연장 가철성 국소의치로 구강 기능이 회복된 상악 무치악 환자의 10년 동안 임상 결과를 기술하고 있다. 상악 전방에 임플란트 고정성 보철물로 4개의 임플란트를 연결고정 하였으며 후방에 가공선 유지장치를 가진 가철성 국소의치가 장착되었다. 하악 무치악은 임플란트 피개의치로 수복되었다. 경과 관찰 기간 동안 고정성 보철물의 인공치아와 전장 레진의 변색, 사고로 인한 보철물 파절 이외에 임플란트 및 국소의치 관련된 기계적, 기계적 생물학적 주요 합병증은 관찰되지 않았다.

• Journal of Periodontal and Implant Science
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• 제48권2호
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• pp.114-123
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• 2018

Purpose: The aim of the current study was to develop a computer-assisted detection system based on a deep convolutional neural network (CNN) algorithm and to evaluate the potential usefulness and accuracy of this system for the diagnosis and prediction of periodontally compromised teeth (PCT). Methods: Combining pretrained deep CNN architecture and a self-trained network, periapical radiographic images were used to determine the optimal CNN algorithm and weights. The diagnostic and predictive accuracy, sensitivity, specificity, positive predictive value, negative predictive value, receiver operating characteristic (ROC) curve, area under the ROC curve, confusion matrix, and 95% confidence intervals (CIs) were calculated using our deep CNN algorithm, based on a Keras framework in Python. Results: The periapical radiographic dataset was split into training (n=1,044), validation (n=348), and test (n=348) datasets. With the deep learning algorithm, the diagnostic accuracy for PCT was 81.0% for premolars and 76.7% for molars. Using 64 premolars and 64 molars that were clinically diagnosed as severe PCT, the accuracy of predicting extraction was 82.8% (95% CI, 70.1%-91.2%) for premolars and 73.4% (95% CI, 59.9%-84.0%) for molars. Conclusions: We demonstrated that the deep CNN algorithm was useful for assessing the diagnosis and predictability of PCT. Therefore, with further optimization of the PCT dataset and improvements in the algorithm, a computer-aided detection system can be expected to become an effective and efficient method of diagnosing and predicting PCT.

• 대한치과교정학회지
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• 제24권4호
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• pp.969-982
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• 1994

This study was designed to investigate the stress distribution, intensity and force mechanism derived from the MEAW by photoelastic stress analysis of the artificial teeth and surrounding bone composed of photoelastic material(PL-3) The findings of this study were as follows, 1. In case of no elastic on the MEAW with tip back, the moderate stress was observed on the molar and canine area, and the light stress was observed on the other area. 2. In case of the vertical elastic on the plain A.W, and the MEAW without tip back, the great stress was observed on the lateral incisor area, but on the MEAW with tip back, the moderate stress was observed on the anterior area and molar area. 3. In case of the C III elastic on plain A.W., the stress was concentrated on the anterior area hanged by elastic but on the MEAW without tip back, the stress was transmitted equally from the anterior area to the posterior teeth area. On the MEAW with tip back, the great stress was observed on the anterior and molar area. 4. In case of the C III elastic on the plain A.W., the stress was concentrated on the posterior area hanged by elastic but on the MEAW without tip back, the stress was transmitted equally from the posterior area to the anterior area. On the MEAW with tip back, the great stress was observed on the posterior area and the moderate stress was observed on the anterior area.

• 구강회복응용과학지
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• 제34권3호
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• pp.225-231
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• 2018

다운증후군 환자는 일반적으로 구강 관리에 대한 인식과 수행능력의 부족으로 구강위생상태가 불량하며, 치아 상실의 위험이 높다. 또한 작고 불규칙한 치아, 부분 무치증의 구강 내 특징으로 보철 치료에 어려움이 있다. 본 증례는 다운증후군 환자에서 상악 무치악 부위의 임플란트 하이브리드 보철 치료에 대한 케이스를 보고하고자 한다. 최종보철물의 외형은 하악 잔존치와 인공치를 조화롭게 설정하여 결정하였고, 위생관리가 용이하도록 가공치부위를 수정하였다. 결과적으로 심미적, 기능적으로 만족스러운 결과를 얻었기에 이를 보고하고자 한다.

• 대한치과보철학회지
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• 제54권4호
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• pp.407-412
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• 2016

심하게 흡수된 치조제를 지닌 환자에게 적절한 의치를 제공하기 위한 한 가지 방법으로써 중립대 인상 기법을 이용한 의치의 제작을 고려해 볼 수 있다. 중립대 내에 인공 치아를 배열하는 것은 다음의 두 가지 목적을 이루고자 함이다. 첫째, 치아가 정상적인 근육의 기능을 방해하지 않도록 하기 위함이며, 둘째, 의치에 저항하여 가해지는 근육 조직의 힘이 안정과 유지에 더 유리하게 작용할 수 있도록 하기 위함이다. 본 증례의 환자는 심한 잔존 치조제의 흡수를 보이는 78세 여자 환자로 오랜 기간 불안정한 상 하악 총의치를 사용하고 있었다. 의치의 안정과 유지를 향상시키기 위하여 중립대 인상 기법을 통한 새로운 의치의 제작을 계획하였다. Modeling compound를 이용하여 중립대를 인기하였으며 치아 배열 후 external impression을 시행함으로써 정확한 연마면을 형성할 수 있었다. 완성된 상 하악 총의치는 보다 향상된 안정과 유지를 보였으며 환자 역시 새로 제작된 의치에 만족감을 보였기에 이를 보고하고자 한다.

• 대한장애인치과학회지
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• 제13권1호
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• pp.23-27
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• 2017

본 증례에서와 같이 외배엽 이형성증 환자에서는 획일화된 치료 방법은 없다. 술자 입장에서는 기능적 또는 형태적으로 완벽한 장치가 아니라 할지라도, 외배엽 이형성증의 무치악 환아에게는 심미적 요구가 만족됨으로써 자존감을 드높일 수 있는 치료가 될 수 있다. 특히 외배엽 이형성증 환아는 어린 나이에 의치 장착을 시작하기 때문에 환자의 나이와 구강상태, 심미적인 요구 수준, 저작 방법 등 여러가지를 고려한 개별적 맞춤화 과정을 통해 치료방법을 찾는 것이 중요하다. 또한 환자의 성장에 맞춰 장치를 교환해주며 타 과와의 활발한 교류로 최선의 치료를 해주는 것이 추천되며, 술자와 환자 및 환자 보호자간의 충분한 대화를 통해 치료 방법을 신중하게 결정하는 것이 좋다.

• 한국치위생학회지
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• 제15권2호
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• pp.325-332
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• 2015

Objectives: The purpose of this study was to investigate tooth whitening maintenance efficacy of several dentifrices containing effective ingredients for tooth whitening. Methods: Hydroxyapatite specimens(HAPs) staining was done by using modified Stookey's methods. HAPs were treated with 2.9% hydrogen peroxide containing strip for whitening, and were shaken with several dentifrice slurry(dentifrice 1 : artificial saliva 2) for 30 minutes. The HAPs were finally dipped in staining solution for an hour. Shaking and dipping were repeated 4 times and lightness values were measured by colorimeter at each step. In clinical test, test 4 dentifrice and control dentifrice were evaluated by 21 subjects for 2 months after receiving institutional review board(IRB) approval. Organoleptic(vita shade guide) and instrumental(SHADEEYE-NCC) evaluation were performed for whiteness change of teeth. Statistical analysis was performed using repeated measures ANOVA, Tukey's post hoc test and ${\chi}^2$-test(p<0.05). Results: All dentifrices showed statistical significance in comparison with control dentifrice containing sodium fluoride and test 4 dentifrice containing sodium pyrophosphate, sodium metaphosphate, candelilla wax, and sodium fluoride showed statistical significance in comparison with other dentifrices by inhibiting staining in vitro(p<0.05). In clinical test, test 4 dentifrice showed better effects than control dentifrice in organoleptic and instrumental evaluation in tooth whitening maintenance efficacy(p<0.05). The awareness toward tooth whitening maintenance efficacy for 2 months use showed that test 4 dentifrice was much better than control dentifrice, but did not show statistically significant(p>0.05). Conclusions: Dentifrice containing sodium pyrophosphate, sodium metaphosphate, candelilla wax and sodium fluoride was more effective in keeping teeth white.